Tigertronics SignaLink SL-1+ Guide

SignaLinkTM SL-1+ Sound Card - Radio Interface
154 Hillview Drive Grants Pass, Oregon 97527
[phone] Fax: [phone] Internet: http://www.tigertronics.com
Installation & Operation
- INTRODUCTION -
The SignaLink Model SL-1+ is an enhanced version of the
Tigertronics SL-1 Sound Card - Radio Interface. In
addition to providing all the features and capabilities of the
original SignaLink, the SL-1+ offers fully adjustable
Transmit and Receive Audio levels, a front panel selectable
short or variable “Hang Time”delay, and a more sensitive
Auto-PTT™circuit. These new features insure
compatibility with virtually all radio Mic jacks, Data and
Accessory Ports, and now make it possible to attach the
SignaLink to the back of the radio, so that you can keep
your microphone plugged-in! Support for Voice modes
such as Internet Repeater Linking (EchoLink, etc.) and
Voice Contest Keyer operation is now provided, and
switching from Digital to Voice can be done with just a
press of the “Delay”switch.
The SignaLink SL-1+ is designed and manufactured using
only the highest quality components. Assembly is done
using “state of the art”robotic production equipment. Strict
testing of every unit, and our high level of quality control
insures you of a premium quality product that will provide
many years of dependable service. A great deal of effort has
gone into the design and manufacture of the SignaLink SL-
1+, and we are very proud to make it available.
- INSTALLATION OVERVIEW -
The SignaLink is very easy to install and operate. However,
if it is not installed and operated correctly, you will not
realize its best performance and in extreme cases you can
damage your other equipment. Therefore, it is extremely
important that you take the time to read these installation
instructions carefully to avoid any possible problems. If
after completing the installation you have any difficulty,
please refer to the “Troubleshooting”section near the end of
this manual. It covers most of the common problems that
you might run into. Technical Support for the SignaLink is
also available if you need it. Please see the “Technical
Support”section of this manual for more information.
- WHAT YOU WILL NEED -
If you purchased the optional SignaLink Cable Accessory
Kit (P/N: SLASSY), then you should have everything that
you need to complete the installation and start operating. If
not, then you will need to purchase the following items from
your local electronics supply store:
· You will need two shielded audio cables with a
3.5mm stereo plug installed on each end. These
cables must be long enough to attach the
SignaLink to your sound card’s Mic and Speaker
jacks.
· If your radio does not provide speaker audio (or the
equivalent) on the Mic, Data, or Accessory Port
connector (check your radio manual), then you will
also need one shielded audio cable with a 3.5mm
mono plug installed on each end. This cable is
used to connect your radio’s External Speaker or
Headphone Jack to the SignaLink, so it can be
relatively short. A length of two feet is usually
about right.
To verify your radio wiring you will need a multimeter.
Some customers may find needle-nosed pliers to be helpful
when installing the programming jumpers. You will need
software for testing when the installation is complete.
Sample software selections for popular modes (PSK-31,
SSTV, MT63, RTTY, etc.) are supplied on the CDROM
included with your SignaLink. You can also download
additional software from the main page of our website at
www.tigertronics.com (see the “SignaLink Software”link).
- CONNECTING POWER -
CAUTION –Before applying power to the SignaLink read
this entire section thoroughly. Both the SignaLink and your
radio can be damaged by improper installation.
Grants Pass, Oregon

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The SignaLink requires a power source of 6.75 to 15 volts
DC at 13 milliamps (nominal). This is low enough that it
can usually be powered by the “Accessory Voltage”found
on the microphone or Accessory Port connector of most
radios. If Accessory Voltage is not available from the radio,
then power can be supplied through a 2.1mm power jack on
the rear of the unit.
Powering From Your Radio –To determine if the
SignaLink can be powered from your radio, you will need to
check the “pin-out”of the radio connector that you are
going to attach the SignaLink to (Mic, Data, Accessory,
etc.). This information can be found in your radio
Operators Manual. Most radios have a small amount of
power available on the mic jack (typically 8v @ 10ma) for
microphone accessories (DTMF pad, LEDs, etc.). Power is
also sometimes available on the Data or Accessory port. If
your manual shows that this voltage is available, then you
can skip now to the “Connecting The Radio”section of this
manual. That section will cover making the actual power
connection.
If power is not available on the radio connector you are
using, then you have a couple of other easy options for
powering the SignaLink. The first option would be to
obtain power from whatever 12 volt supply powers your
radio. To do this you will need to make a short cable from
that power supply to the external power jack on the back of
the SignaLink. Note that you might also be able to obtain
12-volt power from an Accessory Voltage connector on the
back of the radio (check your radio manual). The external
power jack on the SignaLink requires a standard
2.1mm/5.5mm power plug. This plug has been included
with the SignaLink for your convenience. You will need to
wire the plug to your power supply in the appropriate
manner. The polarity of the plug should be center
positive. Be sure to wire the plug with the correct polarity
and be sure to install a fuse in the line for safety. For
maximum protection, we recommend that you fuse BOTH
the positive and negative power lines with a low current
(250 ma or less) “fast blow”fuse.
The second option for powering the SignaLink is to use a
Wall Transformer. This is the quick and easy solution but
it does require an outlet. If you choose this option, you will
need to select a transformer with an appropriate rating. A
common problem in selecting wall transformers is that they
almost always put out more voltage than you expect. This is
because they are rated for output voltage at a specific load
current. If the load on the transformer is below the rated
load, then the voltage output will be higher than the rated
output. Under a light load, it is not uncommon for wall
transformers to provide twice their rated output voltage!
This means that a typical 12 volt transformer might put out
as much as 25 volts under little or no load, which would
exceed the SignaLink input voltage ratings. Because of the
very light load (13ma) provided by the SignaLink, you will
need to select a transformer with a rated voltage well under
12 volts. We would recommend a 6 volt transformer with a
low current rating. Below are some transformer sources
that are appropriate.
Radio Shack P/N 273-1758 (6v 300ma). You will also need
the 2.1mm (5.5mm OD) adapter plug P/N 273-1716.
Mouser Electronics (1-800-346-6873): P/N 412-106054.
(6v 500ma). Mouser also has a 9 Volt 200ma wall
transformer (P/N: 412-109024) that will work.
Digikey (1-800-344-4539): P/N DPD090020-P-5 or
DPD090020-P5-TC. These are both 9 Volt 200 ma units
that will work fine.
- CONNECTING THE SOUND CARD -
The SignaLink connects to the sound card through two
shielded audio cables with 3.5mm stereo connectors.
Connect one cable from the jack labeled “Computer –
SPKR”on the SignaLink to the jack labeled “Speaker
Output”on your sound card. The Speaker Output jack will
be Green if color-coded. Connect the other cable from the
jack labeled “Computer –MIC”on the SignaLink to the
“Microphone Input”jack on the sound card. This jack will
be Pink or Red if color-coded.
Note that if you normally have speakers connected to your
sound card and want to keep them connected while the
SignaLink is installed, then you will need to use a stereo
“Y”adapter cable on the sound card output. We have
supplied a “Y”adapter in our optional Cable Accessory Kit
for your convenience. We do NOT recommend the use of a
“Y”adapter unless you are using “amplified”(powered)
speakers. Conventional speakers often times cause slight
overloading of the sound card output, which can reduce the
signal level available to the SignaLink and produce minor
distortion. This distortion is generally not noticeable to
your ear but can greatly impact the quality of some digital
modulation signals like PSK-31. It is generally preferred
not to leave the speakers connected unless they can be
switched OFF when not in use. You will find most of the
digital modulation schemes very loud and very annoying
anyway!
- CONNECTING THE RADIO -
CAUTION –Before connecting the SignaLink to your
radio, read this entire section thoroughly. Both the
SignaLink and your radio can be damaged by improper
installation.
The SignaLink attaches to the radio through an 8-pin RJ-45
connector located on the rear of the unit. A radio cable with
the appropriate connector for your radio was supplied with
the SignaLink for this purpose. One end of this cable plugs
into the SignaLink’s “RADIO”connector, and the other end
plugs into the radio’s Mic, Data, or Accessory Port

3
connector. This cable brings all of the radio’s signal lines
into the SignaLink, so that you can connect to any line that
is required (see note below on connectors with more than
eight pins). The SignaLink uses the radio’s Ground, PTT,
Speaker Output, Mic Input, and Accessory Voltage lines.
These are the signal names that you will find on a typical
Mic connector. These signals are also available on most
Data and Accessory ports, but they are often labeled
differently. This will be covered in more detail below.
Because the location of these signals on the radio connector
varies from radio to radio, we have provided a
“Programming Socket”inside the SignaLink (see JP-1 in
Figure-4). The Programming Socket provides a convenient
way to route the various signals to the correct pin on the
radio connector. This is accomplished with “press-in”
jumper wires so no soldering is required.
Since the Programming Socket is a standard DIP-16 format,
you can also use a Dip Header Module for programming
rather than wires. This “module”approach requires
soldering but does have the advantage that the resulting
“module”can be quickly changed to re-configure for
different radios. The Dip Headers are available from
Tigertronics as part number “SLHEAD”, and from
electronic suppliers like DigiKey (P/N A103-ND) and
Mouser (P/N 544-16PT-02).
Signal Lines –Every installation requires connecting to at
least three pins on the radio’s Mic, Data, or Accessory
connector. On the Mic connector these are “Mic Input”,
“PTT”, and “Ground”. On the Data or Accessory Port,
these same basic signals are used, but they are usually
labeled differently. The table in Figure 1 shows the
common mic signals and their Data / Accessory port
equivalents. Please refer to this table if you are installing
the SignaLink on your radio’s Data or Accessory port.
Mic Signal Data/Accessory Port Signal
PTT (Push-To-Talk) Standby, PKS, or Packet Standby
Mic / Mic Input TX Data, Data Input, PKD, or
Mod In
AF Out / Speaker RX Data, Data Out, RXD, or
RX Audio
PTT GND PTT Ground, Chassis Ground
Mic GND Signal GND, Mic GND
Figure 1 - Data / Accessory Port Signal Names
Note that many radios actually have multiple ground
connections (Mic Ground, PTT Ground, etc.). The
Programming Socket has multiple ground (G) connections
for this reason.
On many radios the Mic, Data, and Accessory connectors
also provide access to Supply Voltage and Speaker Audio.
Supply Voltage has already been discussed in the section on
“Connecting Power”. If your radio has power available on
the connector then you will be instructed to connect it later
in this section. If Speaker Audio (or the equivalent Data /
Accessory Port signal) is not available from the connector
on your radio, then you will need to install a short (mono)
jumper cable from the External Speaker or Headphone jack
on your radio to the SPKR jack on the rear panel of the
SignaLink. If this signal is available on the connector, then
you will connect it later in this section.
Before proceeding with jumper installation you should
verify in your radio manual that the radio PTT requirements
do not exceed the specifications of the SignaLink keying
circuit. Verify that the PTT is “Grounded”to make the
radio transmit and the PTT signal does not exceed 15 volts
@ 75ma. This is well within the ratings of all modern
radios but could be a problem on some older rigs. If your
radio exceeds these specifications or requires some other
keying arrangement, then you will need to key the radio
using a low voltage/low current relay. Please feel free to
contact Technical Support if you need assistance with this.
Connectors With More Than Eight Pins –The jumper
installation procedure in this manual is for use with radio
connectors that have 8 pins or less. If you are installing the
SignaLink on a 13-pin Accessory port (currently the only
radio connector with more than eight pins), then you will
either be using a fully assembled cable that we provided, or
you will be attaching your own 13-pin connector to our un-
terminated cable. In either case, jumper settings and/or
special instructions for installing the connector and jumpers
were included with the radio cable. Please follow those
instructions instead of the procedures in this manual.
Jumper Settings –If printed jumper settings were supplied
with your radio cable, then please skip to the “Install
Jumper Wires”section, and install the jumpers as shown on
the document. If you did not receive printed jumper
settings with your radio cable, then please check the
“Jumper Settings”section of the SignaLink CD to see if
information for your radio is available. Jumper settings for
the most common radios are included on the CD. If you do
not find the jumpers settings for your radio, then you will
need to follow the procedure below to install the jumpers.
Identifying Jumper Locations - Identifying the jumper
locations for your radio is a two-step process. First we will
identify the pin-out for the radio connector, and then we
will verify that it is correct. The verification process is very
important since incorrect wiring could damage your
equipment. The final steps will be to draw a wiring
diagram using Figure-2 and actually install the jumpers.
· Lookup Pin-out –In your radio Operators Manual,
find the page that identifies the pin-out of the Mic,
Data, or Accessory connector that you are going to use.
Using the manual, identify the pin numbers assigned to
the following signals, and record them below. Note
that the signals found on radio Data and Accessory
ports will likely be labeled differently from those

4
shown. Please refer to the table in Figure 1 for the
equivalent Data / Accessory Port signals.
____ PTT
____ Mic Input
____ Speaker Audio
____ Accessory Voltage
____ Mic Ground**
____ PTT Ground**
____ Chassis Ground**
** Note that some radios only have one ground pin.
** Speaker and Accy Power are not always available.
· Verify Pin-out –This step is Extremely Important
since not all manufacturers use the same numbering
convention for their connectors. This is especially true
of radios using RJ-45 mic connectors. This brief
verification process could ward off a major disaster
when you turn on the power! This procedure verifies
that the pin numbers, which you just identified in the
Operators Manual, do in fact match the numbers
identified on the Programming Socket. The easiest way
to do this is to use a multimeter to verify some of the
more important lines. Before you start, you will need to
make sure that the radio power is OFF, that there are
NO JUMPERS are installed in JP-1, and that the
supplied cable is connected between the SignaLink and
the radio.
Note that you should not find the lines “scrambled”.
They will either be in the correct order or they will be
completely reversed (pin 1=8, 2=7, 3=6, etc).
First check the Ground pin (or pins) recorded earlier.
You can do this by checking for continuity between the
radio chassis and the pins numbered on the
Programming Socket (JP-1). JP-1 is a very convenient
place to probe since it is wired 1:1 to every pin on the
radio connector. You will be checking against the
numbers you recorded earlier from the Operators
Manual. Note that if your radio has a separate mic
ground it may have a slight resistance to chassis
ground. Any other ground pin should test very close to
zero ohms. If you do not get the expected continuity in
this test, try checking against the numbers in the
reverse order (1=8, 2=7, 3=6, etc). It would probably
be very helpful to make a new table using the reversed
number sequence to avoid mistakes! This step should
establish whether or not the radio connector is “reverse
ordered”and allow you to correct the numbers on your
table.
Once you are confident about the ground lines you can
move on to other pins. If your radio had Accessory
Power you should be able to turn ON the radio and use
your multimeter (volts scale) to test for power on the
appropriate pin of JP-1.
You can test the PTT pin as follows: First check the
pin with your multimeter (volts). You should see a
voltage on the PTT pin (5-12v) when the radio is ON.
You should be able to key the radio by grounding the
PTT line. For the sake of safety, you should ground the
PTT pin through a small value resistor (100-1000
ohms) in case it’s not the pin you think it is! Be sure
your radio power is set to LOW and an antenna or
dummy load is connected for this test, as the radio will
go into “transmit”with the line grounded.
If the Speaker signal is available on the connector you
are using, then you can try attaching a speaker or
headphone to the appropriate pin on JP-1 to see if you
can hear audio. Note that you will NOT be able to hear
anything if the speaker source is a low level output
(usually the case on Data and Accessory ports).
There is no easy way to test the mic line but there will
be little doubt about it if the other lines are correct.
The main thing you are looking for here is to determine
whether or not the connector numbers are reversed on
your radio. If you have any unresolved errors, then you
should double check your numbering in the Operators
Manual again.
SPKR
MIC
PTT
PWR
G
- - -
8_______________________
7_______________________
6_______________________
5_______________________
4_______________________
3_______________________
2_______________________
1_______________________
JP1
G
G
Radio Connector
SPKR
MIC
PTT
PWR
G
- - -
8_______________________
7_______________________
6_______________________
5_______________________
4_______________________
3_______________________
2_______________________
1_______________________
JP1
G
G
Radio Connector
Figure 2 –Jumper Wiring Diagram
· Draw Jumper Wires - Once you have verified your
pin-out and are comfortable with the results, you are
ready to label the lines in Figure-2 and draw in the
jumper wires. To do this, you simply need to draw a
line between the pins on the left of JP-1 (G, PWR, PTT,
Mic & SPKR) and their appropriate match on the right
side of the diagram. For example, draw a line between
“PWR”pin on the left of JP-1 and the line that you
labeled “Accessory Voltage”. The “PTT”pin should be
connected to the pin that you labeled “PTT”and so on.
If you are installing the SignaLink on a Data or
Accessory port, then refer to Figure 1 for the correct
signal names. An example of the Jumper Wiring
Diagram for a Kenwood TS-450 is shown in Figure 3.

5
Figure 3 –Example Jumper Wire Diagram for TS-450
VERY IMPORTANT NOTE! –You are about to install
the jumper wires. The wires must be 24ga AWG or
you will damage the socket! It would be best to use the
wires that we provided for this purpose to avoid
damage.
· Install Jumper Wires –Now that you know where the
jumper wires go, all you need to do is install them!
This is best done by gripping them close to the end with
needle-nosed pliers. When pushing the wires into the
socket, be very careful not to bend them back and forth
or they might break. If you break a wire off in the
socket, there is no way to remove it. You will have to
have a new socket installed! This should not be an
issue if you are just a little bit careful. If you plan to
change the socket configuration often for different
radios, you might prefer to use a Dip Header for
programming, rather than wires. The Dip Header is a
small terminal block that you can solder the wires onto
and then simply plug into JP-1 when it’s finished. This
is by far the best method if you need to switch radios
often. The Dip Headers are available from Tigertronics
as part number “SLHEAD”, and from electronic
suppliers like DigiKey (P/N A103-ND) and Mouser
(P/N 544-16PT-02).
Once you have all of the jumpers installed, take a
minute to look them over. You might want to compare
your jumper settings to the sample settings shown in
the “Jumper Settings”section of the SignaLink
CDROM.
NOTE: If you are using the external “SPKR”or
“PWR”input jacks on the rear of the SignaLink, then
you should NOT have any jumpers going to the
“SPKR”or “PWR”pins on JP-1.
· Measure Accessory Voltage –This step is normally
not necessary. But, if you have wired the accessory
power from your radio and are not sure if it is adequate
to power the SignaLink, then you can easily verify the
voltage. First make sure the pc board is on an insolated
surface (no metal or wire clippings under board!).
Turn on the radio and press the Power switch on the
SignaLink. The green Power led should illuminate.
Using your multimeter (volts) verify the voltage
between chassis ground and test point TP-1 near the
left rear corner of the SignaLink pc board (Figure-4).
The voltage should be at least 6.75 volts for proper
operation. If the voltage is not adequate, then you will
need to remove the Power jumper on JP-1 and power
the unit externally (see “Connecting Power”).
JP2 JP1 TP1
Delay Ctrl RX Level Ctrl TX Level Ctrl
Figure 4 –Location of TP1, JP1, JP2 and the TX, RX, and
Level controls.
- AUXILIARY AUDIO OUTPUT –
The SignaLink has an Auxiliary Audio Output jack on the
front panel that can be used to attach an external radio
speaker or headphones for monitoring receiver audio.
Inside the SignaLink we have provided jumper JP-2 to
allow you to select when the external audio jack is active.
By default we have jumpered both positions on JP-2 which
makes the audio available all of the time. However, you can
move the jumpers to allow the jack to be active only when
the SignaLink is ON or OFF. To make the jack active when
the unit is ON, jumper pins 1 & 2. To make the jack active
when the unit is OFF, jumper pins 3 & 4. For example, if
you only install the jumper on pins 3 & 4, the audio jack
will only be active when the SignaLink is OFF. This is a
nice way to mute the speaker when you are working the
digital modes! Note that if your radio has audio on the mic
connector, you can also use the rear panel SPKR connector
for an external speaker. This jack is wired directly to the
SPKR pin on JP-1.
NOTE: Attaching or removing an external speaker while
you are using the SignaLink will change the loading on the
radio’s speaker circuit. This will probably cause a change
SPKR
MIC
PTT
PWR
G
- - -
8_______________________
7_______________________
6_______________________
5_______________________
4_______________________
3_______________________
2_______________________
1_______________________
JP1
G
G
Radio Connector
Ground
Mic Input
Packet Standby (PTT)
Receive Audio
+8 VDC
Mic Ground
SPKR
MIC
PTT
PWR
G
- - -
8_______________________
7_______________________
6_______________________
5_______________________
4_______________________
3_______________________
2_______________________
1_______________________
JP1
G
G
Radio Connector
SPKR
MIC
PTT
PWR
G
- - -
8_______________________
7_______________________
6_______________________
5_______________________
4_______________________
3_______________________
2_______________________
1_______________________
JP1
G
G
Radio Connector
Ground
Mic Input
Packet Standby (PTT)
Receive Audio
+8 VDC
Mic Ground

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in the level of audio going to the sound card, and may
require you to re-adjust the audio level to compensate.
- SETTING THE AUDIO LEVELS -
(QUICK PROCEDURE!)
Before you operate your SignaLink on the air, you will need
to adjust your soundcard and radio Receive and Transmit
Audio levels. Incorrect adjustment of these levels can cause
poor performance or unreliable operation. This procedure
tells you how the levels should be set. It assumes you
already know how to use your computer to set sound card
levels. If you are not familiar with setting the sound card
levels, then please refer to the “Detailed Procedure”for
doing this in the back of this manual.
Before you can adjust the audio levels, the SignaLink must
be connected to the sound card and radio. Both the
SignaLink and the radio should be powered ON and a
communications program that you have selected should
already be installed on your computer. Note that you will be
using the communications program to generate the audio
tones that are used to adjust the level controls, so CW
programs should NOT be used unless they have a
continuous "Tune" mode. A PSK-31 program like DigiPan
is ideal for making these adjustments.
Transmit Audio Adjustment
· If the SignaLink is connected to your radio’s Mic jack,
then set your radio to USB. If the SignaLink is
connected to a Data or Accessory Port, then you will
need to set your radio to the appropriate mode for this
type of connection. USB will work on some radios, but
you may need to select a special mode such as “Data”,
“User”, or “D-USB”. If you are not sure which mode to
use, then consult your radio manual.
· If the SignaLink is connected to your radio’s Mic jack,
then turn the radio’s Mic Gain control all the way
down so that there will not be any transmit power. If
the SignaLink is connected to a Data or Accessory Port,
then the Mic Gain control may not have any effect on
the power output (consult your radio manual). If this is
the case with your radio, then you will need to turn
down the radio’s “Forward Power”control instead.
Otherwise, you should set this control to provide
maximum power. Note that the “Forward Power”
control might be labeled “RF Power”or “Carrier
Power”on your radio.
· Your radio’s Speech Processor / Compressor and VOX
features should be turned OFF.
· Select “TUNE”in your communications program.
Open the Windows “Volume Control Panel”and select
“Playback”controls. Make sure that the “Master
Volume”(far left volume control) and “Wave Volume”
controls are NOT muted. The “Microphone”control
(under Playback ONLY!) MUST be muted.
· Adjust the “Master Volume”control for 75% of full
volume. Next, set the “Wave Volume”control to zero
and then advance it slowly noting the point where the
SignaLink’s PTT LED turns ON. This “ON”point is
the absolute minimum level needed to switch the
SignaLink into Transmit, so we will need to increase
the level further to insure reliable operation. Increase
the Wave control to a point about 50% higher than the
point where PTT activates.
· If the SignaLink is connected to your radio’s Mic jack,
then you should now be able to adjust the radio’s Mic
Gain control for the desired transmit power level (see
important note below BEFORE making final
adjustments to your transmit power!). If you cannot
get adequate power by adjusting the Mic Gain control,
then you may need to set both the Master and Wave
volume controls higher (if possible), or adjust the
SignaLink’s internal “TX Level”control for more
output (see “TX Level and RX Level Controls”at the
end of this section).
· If the SignaLink is connected to a Data or Accessory
Port, then the Mic Gain control may not affect power
output. In this case, you will need to adjust the radio’s
transmit power output by setting both the Master and
Wave volume controls higher, or by adjusting the
SignaLink’s internal “TX Level”control for more
output (see “TX Level and RX Level Controls”at the
end of this section). Your radio might also have a Data
or Accessory Port gain control that can be increased to
provide more power out (usually through a radio menu
setting –check your radio manual). Be sure to read
the important note below BEFORE making final
adjustments to your transmit power!
· Be sure to turn your program’s “TUNE”function OFF
when you are finished making adjustments. If the PTT
LED never turns ON, then you need to set your Master
and Wave controls higher. If it still fails to turn ON, or
if you cannot reach the desired transmit power level,
then see the Troubleshooting section of this manual for
possible causes.
· IMPORTANT - Before you set your transmit power
level, you need to check your radio manual and find out
what the recommended maximum transmit level and
duty cycle are. Most digital modes are similar to RTTY
(100% duty cycle) and cannot be run at full power
without damaging your radio. Also, some modes (like
PSK-31) typically only require 25 watts or less for
reliable communication. You can actually “swamp”
out other users if you use too much power.
Receive Audio Adjustment
· Open the Windows “Volume Control Panel”and select
“Recording Controls”. The “Master Volume”(if
available) and “Microphone Volume”controls should

7
be “Selected”(check box). Set the “Master Volume”(if
available) and the “Microphone Volume”controls to
50%. These settings should be adequate for normal
operation.
· If the SignaLink is attached your radio’s Mic jack, then
all further adjustment of the Receive Audio level should
be done with the radio’s Volume control. If you are not
able to get an adequate amount of Receive Audio with
these settings, then you can set the sound card Mic
volume control higher, or adjust the SignaLink’s
internal “RX Level”control for more output (see “TX
Level and RX Level Controls”at the end of this
section).
· If the SignaLink is attached your radio’s Data or
Accessory Port, then all further adjustment of the
Receive Audio level should be done with the sound
card’s Mic volume control, or the SignaLink’s internal
“RX Level”control (see “TX Level and RX Level
Controls”at the end of this section).
· If you are unable to get an adequate Receive Audio
level, then please see the Troubleshooting section of
this manual.
- TX LEVEL AND RX LEVEL CONTROLS -
IMPORTANT - Do not attempt to adjust these controls
until after you have completed either the “Quick”audio
level setting procedure, or the more detailed procedure in
the back of this manual. The TX Level and RX Level
controls do NOT need to be adjusted for most installations.
The SignaLink’s TX Level and RX Level controls allow you
to adjust the Transmit Audio level going to the radio, and
the Receive Audio level going to the sound card. The
factory default setting for both of these controls is fully
counter-clockwise (minimum) and is ideal for most
installations. However, some equipment combinations may
require more audio than the factory settings provide. If you
have completed the audio level setting procedure, and
cannot get adequate Transmit power or Receive Audio, then
you can adjust these controls to provide the correct level for
your installation. The location of these controls is shown in
Figure 4. To increase the level, simply turn the control
clockwise. We recommend that you use the proper trimmer
adjustment tool to do this, but a small jewelers type
screwdriver can be used instead.
NOTE: The “TX Level”control does NOT affect the
operation of the SignaLink’s PTT circuit. If you cannot get
the PTT LED to turn ON, it has nothing to do with the TX
Level adjustment. You should NOT adjust the TX Level
control until the sound card levels have been set properly
and the SignaLink is switching to Transmit. See the
Troubleshooting section of this manual if you need
assistance with this problem.
- GENERAL RADIO SETTINGS -
Virtually all digital modes require that you TURN OFF any
Speech Processing or Compression features in your radio.
This is to insure RF linearity. You must also TURN OFF
your VOX circuit when using the SignaLink. As mentioned
in the sound card level settings procedure, you can usually
use your radio’s USB mode for digital operation (LSB for
some bands). However, if the SignaLink is connected to a
Data or Accessory Port, then you may need to select a
special mode such as “Data”, “User”, “D-USB”or “D-LSB”
(to name a few). If you are not sure which mode to use,
then consult your radio manual.
- SIGNALINK OPERATION -
Operation of the SignaLink is very simple. The
SignaLink’s “receive”circuitry is active at all times, so you
do not need to turn it ON to receive signals through it. The
“transmit”circuitry is only active when the unit is turned
“ON”. When active, the SignaLink will trigger your radio’s
PTT whenever it sees sound card activity, so it is important
to keep it turned “OFF”when it is not in use to prevent
accidental transmissions. If you are using your computer
solely for Digital operation, you might want to consider
disabling your Windows sounds.
Delay Switch - The front panel “Delay”switch is used to
control the Transmit “Hang Time”for the SignaLink’s
Auto-PTTäcircuit. With the Delay switch OUT, the radio
will remain keyed for approximately 30 milliseconds after
Transmit Audio from the sound card has stopped. This
setting is suitable for CW QSK operation, and other modes
that require fast turn-around times like Packet. It is also the
best position for many other digital modes like PSK-31 and
MT63.
With the Delay switch pressed IN, the “Var”LED on the
SignaLink’s front panel will turn ON to indicate that the
variable Hang Time delay is selected. In this position, the
Hang Time delay can be adjusted from approximately
300ms to 3 seconds, by means of an internal “Delay”
control (see Figure 4 for location). The factory default
setting for this control is approximately two seconds, which
is adequate for most Voice modes such as Internet Repeater
Linking, Remote Base operation, and Voice Contest Keyers.
For slow AFSK CW, you will probably want to decrease the
Hang Time delay to between 500 ms and 1 second.
- VISIT US ON THE INTERNET -
If you have Internet access, please visit our web site at:
http://www.tigertronics.com

8
Our site contains the latest news about Tigertronics’
products, support information, and other information of
interest to all Hams and SWLs. This is also the best source
for downloadable programs that work with our products.
We also have all of our distribution software and
documentation available for download as well. The site is
updated often, so stop in on a regular basis and get the latest
news and updates.
- YOUR COMMENTS WELCOME -
We have made every effort to make the SignaLink the best
product possible. We welcome any comments or
suggestions that you would like to make. Please drop us a
note to let us know about your experiences, tips you would
like to share with other users, or how we might do a better
job for you.
- LIMITED WARRANTY -
Tigertronics warrants the SignaLink to be free of defects in
material and workmanship for a period of 90 days from the
date of shipment. Tigertronics will repair or replace, at its
option, any parts found to be defective during the warranty
period. This warranty does not include any unit that has
been subject to misuse, neglect, improper installation or
operation. This warranty is in lieu of all others, express or
implied, and no person or representative is authorized to
assume for Tigertronics any other liability in connection
with the sale or use of this product. Tigertronics will not be
responsible for any expense or loss of revenue or property
incurred by the user due to operation or malfunction of this
equipment. Tigertronics reserves the right to make circuit
or component changes, or to incorporate new features, at
any time, without obligation.
- RETURN POLICY -
A Return Material Authorization Number (RMA#) must be
obtained before any product will be accepted for return or
repair. Items received without an RMA# clearly marked on
the OUTSIDE of the package WILL BE REFUSED. Items
being returned must be sent prepaid. Returned items should
have a note attached showing the RMA#, customer name,
return address, phone number, and action requested. Units
being returned for warranty repair must be accompanied by
a copy of the original sales invoice showing the date of
purchase.
Customers wishing to return a product for REFUND, for
ANY REASON, must receive an RMA# within 15 days
from the shipping date shown on the original sales invoice.
Customers returning products for refund will be charged a
Restocking Fee equal to 20% of the purchase price, to cover
the cost of re-testing and re-stocking. Products that have
been damaged or modified in any way may not be returned.
Contact our Technical Support department for the RMA#.
- TECHNICAL SUPPORT -
BEFORE YOU CALL –The vast majority of technical
issues can be resolved with the information that is available
in this manual and on the Tigertronics web site. If you
thoroughly investigate these resources, you will probably
never need to call. Please take some time to read through
this manual, and then check the online support resources to
be sure that you have the most current software and
documentation available. Thank you.
If you encounter a problem that you cannot resolve with the
SignaLink (not software), please contact our Technical
Support Staff at [phone]. They are available every
Monday, Wednesday, and Friday, from 1:00 PM to 5:00
PM Pacific Time. Be sure to have your equipment
available for testing when you call. Please DO NOT mail,
email, or fax your technical inquiries. We realize that
calling is a little more expensive, but more can be
accomplished in a few minutes on the phone than can be
done in hours of writing!
- GENERAL SPECIFICATIONS -
Power Supply: 6.75 - 15 VDC @ 13 ma (nom)
Freq Response: 300Hz –3.3KHz
In / Out Impedance: 600 ohm
Attenuation: Radio To Sound Card: Variable
Sound Card to Radio: Variable
Auto-PTTäDelay: Fast (OUT) –30 ms
Variable (IN) –300 ms to 3 sec
PTT Circuit: MOSFET Transistor
Rating - 15v @ 75 ma (Max)
Radio Connector: Mic, Spkr, Pwr, PTT - RJ-45
Spkr - 3.5mm Mono
Sound Card Conn: Mic/Spkr - 3.5mm Stereo
Other Connectors: Aux. Spkr - 3.5mm Mono
Aux. Power - 2.1mm Coaxial
Case: Extruded Aluminum - 6061T4
Screws: Stainless steel socket head cap
3/32”Allen head
Dimensions: 1.1”x 2.7”x 3.2”

9
Operating Temp: -30C to +60C
Troubleshooting and Detailed Adjustment Procedures
- TROUBLESHOOTING -
These are the most common problems as reported by our
Technical Support Staff. If you do not find your problem
listed here, or if you are unable to resolve the problem, then
please refer to the Technical Support section of this manual
for instructions on contacting Technical Support.
Radio doesn’t transmit AND the SignaLink's PTT LED
is OFF - It is important to remember that the SignaLink
keys the radio automatically when it detects transmit audio.
If the PTT LED on the SignaLink is OFF, then it is most
likely because the signal from the soundcard’s speaker
output is not getting to the SignaLink, or because the signal
level is too low. Please check the following:
· Sound card not functioning properly - If you are not
sure that your sound card is functioning correctly, then
you should perform the soundcard test following this
section.
· Sound card levels set too low –Repeat the procedure
for setting the sound card audio levels. If this does not
resolve the problem, then set the Master Volume
control to 90-95% of full volume (instead of 75%), and
try again. If a higher volume setting works, then you
should find the lowest setting that works reliably, and
then have a friend verify that your transmitted signal is
undistorted.
· Soundcards with Digital outputs –If your soundcard
has digital outputs, then you will need to disable them
for the SignaLink to work properly. Most digital
outputs can be disabled by running the software that
was supplied with the sound card, and selecting
“Disable Digital Outputs”. If you are not sure how to
do this, then please consult the instruction book that
came with your soundcard or PC.
· Sound card cables reversed –Make sure you have not
reversed the mic/spkr cables to the sound card, and that
they are plugged into the correct sound card jacks. The
Speaker Output jack will be Green if color-coded, and
the Mic Input jack will be Red or Pink. Most sound
cards are poorly marked so you may need to refer to
your computer’s manual to verify the correct jack
location.
Radio doesn’t transmit even though the SignaLink's
PTT LED is ON - If the SignaLink's PTT LED turns ON
but the radio doesn't switch to transmit, then you have
jumpered the PTT signal incorrectly on JP-1. This should
not be an issue if you tested the PTT line as outlined in the
jumper section. If you find ANY jumper connected wrong
then we recommend that you go through the entire jumper
installation procedure again.
Radio transmits but there is no power output, or it is too
low –Verify that your radio’s “Forward Power”(sometimes
called “RF Power”or “Carrier Power”) control is set to
maximum. If the SignaLink is attached to your radio’s Mic
jack, then power is normally adjusted using the radios Mic
Gain control. If this control is set to maximum and you are
not able to obtain the desired transmit power level, then you
may need to set the computer’s Master and Wave Playback
controls higher, and/or adjust the SignaLink’s internal “TX
Level”control for more output. If the SignaLink is attached
to your radio’s Data or Accessory Port, then the Mic Gain
control may not have any effect on the power output. If this
is the case with your radio, then you will need to set the
computer’s Master and Wave Playback controls higher (if
possible), and/or adjust the SignaLink’s internal “TX
Level”control for more output. You may also need to
increase the Data/Accy Port gain on your radio. If
available, this can be adjusted via a menu setting on most
newer radios.
My Transmit signal is “wide”or distorted –This is
generally the result of over-driving your radio. Verify that
your radio’s speech processor/compressor is turned OFF.
Your radio’s “Forward Power”control (sometimes called
“RF Power”or “Carrier Power”) should be set to maximum.
If you have lowered this control to decrease your transmit
power, then you more than likely have not set the audio
levels correctly, and are overdriving your radio. Follow the
“Setting The Audio Levels”procedure to correct this
problem. If the above mentioned radio controls are set

10
correctly, then try turning the mic gain down and see if that
improves the quality of your signal. If the mic gain has no
effect (this may be the case with a Data or Accessory Port
connection), then you may have the software PlayBack
volume controls, or the SignaLink’s TX Level control set to
high. See the “Set Audio Levels”procedure to correct this.
The SignaLink transmits when the radio volume is
turned up (or tuned to a strong signal), or the SignaLink
flutters between Transmit and Receive –This problem is
caused by an incorrect sound card mixer setting. To fix this
problem, open the Windows Volume Control Panel. Select
PlayBack Controls, and check the “Mute”check-box under
the Microphone control. Be sure that you disable the Mic in
PLAYBACK CONTROLS ONLY, or you will not be able to
receive!
I can't seem to receive - There are several possible causes
for this problem:
· Sound card not functioning properly - If you are not
sure that your sound card is functioning correctly, then
you should perform the Sound Card Test following this
section.
· The Microphone volume control is not selected - The
“Select”check box for the Mic control (under
RECORDING CONTROLS ONLY) should be checked.
· Sound card or radio level controls set too low -
Because there are multiple controls that effect audio
levels, it is very easy to have one set wrong. See the
"Setting The Audio Levels" section of this manual to
correct the problem.
· Sound card cables reversed –Make sure you have not
reversed the mic/spkr cables to the sound card, and that
they are plugged into the correct sound card jacks. The
Speaker Output jack will be Green if color-coded, and
the Mic Input jack will be Red or Pink. Most sound
cards are poorly marked so you may need to refer to
your computer’s manual to verify the correct jack
location.
· Computer too slow or incompatible with software.
Software not configured properly - Check the
documentation for the program that you are using and
verify that your computer meets the minimum
requirements. Verify that the program is configured
correctly and be sure that you are using it correctly. If
all else fails, try using a different program.
Why Can't I Receive Some Stations - No matter how good
your antenna and radio are, there will always be some
stations that you cannot copy (even with strong signals!).
While the reason for this may be because of operator error
(wrong mode or baud rate, off frequency, etc.), radio wave
propagation problems can often prevent you from receiving.
Some modes are more susceptible to this than others. For
example, even though PSK31 usually works very well with
weak signals, sometimes even strong PSK31 signals cannot
be copied at all because of multipath and Doppler Shift
propagation problems. Other modes like HF Packet and
RTTY do not work well with weak signals and are
susceptible to multipath and Doppler Shift.
Windows "System Sounds" cause the SignaLink to
transmit –Because the SignaLink is activated by sound
card output, it is important that it is turned OFF when not
in use. The sounds that are generated by Windows during
different system events (Startup, Shutdown, File Close, etc.)
can be transmitted if they are inadvertently sent to the
SignaLink. Turn the SignaLink OFF when you’re done
using it, or disable your Windows system sounds to avoid
this issue.
- TESTING YOUR SOUND CARD -
If you are having unexplainable problems or are simply not
sure if your sound card is working at all, you can use the
following test procedure to verify sound card operation.
This test uses the Sound Recorder program that comes with
Windows to test your sound card’s record and playback
functions. Before you begin the test, you need to verify that
your computer speakers are plugged into the sound card and
that all programs that use the sound card are closed.
To test the record function of the sound card, we need to
have an audio source connected to the sound card's
Microphone input. We will use your radios external
speaker output for this purpose. Disconnect ALL CABLES
from the SignaLink before you start this test.
· Using a mono cable, connect the Speaker or Headphone
output of your radio to the “SPKR”jack on the rear of
the SignaLink. Be sure to use the jack that’s labeled
“SPKR”(not the one labeled “Computer - SPKR”).
· Using a stereo cable, connect the SignaLink’s
“Computer - MIC”jack to your sound card’s
Microphone input jack (not the Line Input). This jack
will be Red or Pink if color-coded. Make sure no other
cables are connected.
Before we can record a signal, we need to adjust the radio
and computer volume controls. Please note that the volume
settings used here are for test purposes only. The controls
will need to be re-adjusted later using the procedure found
in the “Set Audio Levels”section of this manual. For now,
adjust the audio level controls as follows:
· Set your radio’s volume control to half of full volume.
· Open the Windows Volume Control Panel by clicking
on the Start Button and selecting Programs (or “All
Programs”), Accessories, Multimedia (or
“Entertainment”) and then Volume Control. The

11
Volume Control panel should look similar to the one
shown below:
Figure 1 –Volume Control Panel
· From the Options menu, select Properties to display the
Properties page. In the “Adjust Volume For”window,
select Playback.
· In the “Show the following volume controls”window,
verify that the Master Volume and Wave controls are
selected. The Properties Page should look like the one
shown in Figure-2. Note that the Master Volume
control may be labeled “Volume Control”.
Figure 2 –Sample Properties Page
· Click OK to close the properties page. The Playback
volume controls should now be displayed.
· Set the Master Volume and Wave controls to 1/2 of full
volume. Verify that the Master Volume and Wave
Level controls are NOT muted. The Balance controls
should be left in their center position.
· From the Options menu, select Properties to display the
Properties page. In the “Adjust Volume For”window,
select Recording.
· In the “Show the following volume controls”window,
verify that the Microphone box is checked. When you
are done, the Properties Page should look similar to the
one shown below.
Figure 3 –Record Properties
· Click OK to close the properties page. The Volume
Control panel should now show only the Recording
controls, and should look similar to the picture shown
below.
Figure 4 –Record Level Controls
· Set the Sound Card’s Master Volume and Microphone
Level controls to mid range. Verify that these controls
are “Selected”by the Select check box below each
control. If only one level control can be selected at a
time, then select the Microphone input.

12
NOTE: The Master Volume control may not be
available on some computers.
· Click on the X in the upper right-hand corner to close
the Volume Control. Your new settings will be saved
automatically.
Now that the recording and playback controls are set to a
usable level, we are ready to record and playback a test
sound.
· Start the Sound Recorder program by clicking on the
Start Button and selecting Programs (or “All
Programs”), Accessories, Multimedia (or
“Entertainment”) and then Sound Recorder. The
Sound Recorder program should look like the picture
below. Note the location of the Record, Stop and Play
buttons.
Figure 5 –Sound Recorder Screen Shot
· To begin recording, click the Record button. If
everything is working correctly, you will see the
position slider moving from left to right and the
Position display incrementing. You should also see the
scope display in the center of the program window
track the audio signal. If nothing happens, or if you get
an error message, then see the "Sound Card Problems"
section below.
· If everything appears to be working, then let the
program record for a few seconds and then click the
Stop button. We now have a test sound recorded that
we can play back through the speakers.
· To play the sound, click the Play button. You should
hear the sound through your computer speakers. If you
do, then you can close the Sound Recorder program.
Your sound card is functioning correctly. If you don’t
hear the sound playback, then you need to proceed to
the "Sound Card Problems" section below.
Sound Card Problems
While Tigertronics does NOT provide support for sound
card problems, we have listed a few troubleshooting tips
here to help you with some of the most common problems.
If you are unable to resolve a problem with your sound card,
then you will need to contact your computer’s manufacturer
or a computer repair shop for help.
· If the record and playback features of the Sound
Recorder program seem to work, but no sound is ever
heard (or seen on the scope display), then check the
level controls. You might have one of the volume
controls muted, de-selected or set too low. If the
volume controls look ok, then check your cabling.
Verify that the cables have the right type of connector
installed (3.5mm stereo) and are plugged into the right
jacks. If you are using amplified speakers, verify that
they are turned ON.
· If you receive an error message when you click the
Record or Play button, then you need to verify that all
other programs that use the sound card are closed.
Problems can occur if more than one program tries to
access the sound card at one time. If all of the other
sound card programs are closed and you still receive an
error message when you click the Record or Play
button, then your sound card or its drivers may not be
installed correctly. Refer to the instructions that came
with your sound card (or computer) to re-install the
card and / or drivers.
· If all of the Sound Recorder control buttons (Record,
Play, etc.) are disabled, then your sound card drivers
are probably not installed correctly. Refer to the
instructions that came with your sound card (or
computer) to re-install the card and /or drivers. Note
that it is normal for the Play, Rewind and Fast Forward
buttons to be disabled until after you have recorded a
sound.
- SETTING THE AUDIO LEVELS -
(DETAILED PROCEDURE)
This is a “Step-By-Step”procedure to assist those who are
not already familiar with setting sound card levels using the
Windows Volume Control Panel. Before you operate your
SignaLink on the air, you will need to adjust the Receive
and Transmit Audio levels. Incorrect adjustment of these
levels can cause poor reception, over-modulation, or
improper operation. This procedure will show you how to
adjust your sound card and radio audio levels for optimum
performance.
Before you can adjust the audio levels, the SignaLink must
be connected to the sound card and radio. Both the
SignaLink and the radio should be powered ON and a
communications program that you have selected should
already be installed on your computer. Note that we will be
using the communications program to generate the audio
tones that are used to adjust the level controls, so CW
programs should NOT be used unless they have a
continuous "Tune" mode. A program like DigiPan is ideal.

13
Transmit Audio
Follow the steps below to set your transmit audio level.
· Start the communication program and leave it in
Receive mode.
· Open the Windows Volume Control Panel by clicking
on the Start Button and selecting Programs (or “All
Programs”), Accessories, Multimedia (or
“Entertainment”) and then Volume Control. The
Volume Control panel should look similar to the one
shown in Figure-6.
Figure 6 –Volume Control Panel
· From the Options menu, select Properties to display the
Properties page. In the “Adjust Volume For”window,
select Playback.
· In the “Show the following volume controls”window,
verify that the Master Volume and Wave level controls
are selected. When you are done, the Properties Page
should look like the one shown in Figure-7.
NOTE: The Master Volume control may be simply
labeled “Volume Control”.
Figure 7 –Playback Properties
· Click OK to close the Properties page.
· Set the sound card’s Master Volume control to
approximately 75% of full volume. Set the sound
card’s Wave level control to minimum.
· The Balance controls should be left at their center
position.
· Verify that the Master Volume and Wave level controls
are NOT muted (check box).
· Verify that the Microphone control is muted. This
control MUST be muted. Any other controls that you
are not using can be muted to reduce the amount of
noise picked up by the sound card, but they do not have
to be.
· Verify that all special audio processing features are
turned OFF. This includes features like, “Bass Boost”,
“Audio Expander”, etc. These features must be turned
OFF or they will distort your transmit audio. If
available, these features can usually be accessed
through an “Advanced”button on the volume control
panel.
· Put your communications program into Transmit mode.
If the program has a “Tune”mode, then select it
instead.
· The SignaLink’s PTT LED should be OFF at this point.
Now, slowly slide the sound card’s Wave level control
up until the PTT LED turns ON. This “ON”point is
the absolute minimum level needed to switch the
SignaLink into Transmit, so we will need to increase
the level further to insure reliable operation. Increase

14
the Wave control to a point about 50% higher than the
point where PTT activates.
· If this SignaLink is connected to your radio’s Mic jack
(see below for Data/Accy Port connections), then you
should now be able to adjust the radio’s Mic Gain
control for the desired transmit power level. If you
cannot get adequate power by adjusting the Mic Gain
control, then you may need to set both the Master and
Wave volume controls higher, or adjust the
SignaLink’s internal “TX Level”control for more
output (see the “TX Level and RX Level Controls”
section of this manual). Be sure to see the
IMPORTANT NOTE below BEFORE making final
adjustments to your transmit power level.
· If the SignaLink is connected to a Data or Accessory
Port, then the Mic Gain control may not affect power
output. In this case, you will need to adjust the radio’s
transmit power output by setting both the Master and
Wave volume controls higher, or by adjusting the
SignaLink’s internal “TX Level”control for more
output (see “TX Level and RX Level Controls”at the
end of this section). Your radio might also have a Data
or Accessory Port gain control that can be increased
(usually through a radio menu setting –check your
radio manual). Be sure to see the IMPORTANT
NOTE below BEFORE making final adjustments to
your transmit power level.
· IMPORTANT NOTE: Before you set your transmit
power level, you need to check your radio manual and
find out what the recommended maximum transmit
level and duty cycle are. Most digital modes are
similar to RTTY (100% duty cycle) and cannot be run
at full power without damaging your radio. Also, some
modes (like PSK-31) typically only require 25 watts or
less for reliable communication. You can actually
“swamp”out other users if you use too much power.
Receive Audio
Follow the steps below to set your receive audio level.
· Set your radio’s volume control to about 25% of full
volume.
· If it's not already running, start the Windows Volume
Control program again by clicking on the Start Button
and selecting Programs (or “All Programs”),
Accessories, Multimedia (or “Entertainment”) and then
Volume Control.
· From the Options menu, select Properties to display the
Properties page. In the “Adjust Volume For”window,
select Recording.
· In the “Show the following volume controls”window,
verify that the Microphone box is checked. When you
are done, the Properties window should look similar to
the one shown in Figure-8.
Figure 8 –Recording Properties
· Click OK to close the Properties window.
· The Volume Control panel should now show only the
Recording controls. It should look similar to the
picture shown in Figure-9.
Figure 9 –Record Level Controls
· Set the sound card’s Master Volume and Microphone
Level controls to mid range. Verify that these controls
are selected by the “Select”check box below each
control. If only one level control can be selected at a
time, then select the Microphone input.
NOTE: The Master Volume control may not be
shown.

15
· The sound card’s volume levels are now properly set.
· If the SignaLink is attached your radio’s Mic jack, then
all further adjustment of the Receive Audio level should
be done with the radio’s Volume control. If you are not
able to get an adequate amount of Receive Audio with
these settings, then you can set the sound card Mic
volume control higher, or adjust the SignaLink’s
internal “RX Level”control for more output (see the
“TX Level and RX Level Controls”section of this
manual).
· If the SignaLink is attached your radio’s Data or
Accessory Port, then all further adjustment of the
Receive Audio level should be done with the sound
card’s Mic volume control, or the SignaLink’s internal
“RX Level”control (see the “TX Level and RX Level
Controls”section of this manual).
· Click the “X”in the upper right hand corner of the
Volume Control window to close it and save your
settings.
NOTE: If you are unable to get an adequate Receive Audio
level, then please see the Troubleshooting section of this
manual for possible causes.
SignaLinkäand AutoPTTäare trademarks of Tigertronics
Copyright © 2001-2015 Tigertronics - All Rights Reserved
(3/03/06 Rev-C)