RACOM 1402 User manual

1402MAN.TXT
RACOM MODEL 1402 AND 1402D
AUTOMATIC MORSE CODE STATION IDENTIFIERS
TABLE OF CONTENTS
FCC WARNING . . . . . . . . . . . . . . . . . . . . . 2
INSPECTION . . . . . . . . . . . . . . . . . . . . . 2
Return for Warranty or Repair . . . . . . . . 2
SPECIFICATIONS for Model 1402 . . . . . . . . . . . . 3
Additional Specifications for Model 1402D . . 4
OPTIONS for Models 1402 and 1402D . . . . . . . . . . 4
INTRODUCTION AND GENERAL FEATURES . . . . . . . . . . 5
Usage of the RACOM 1402 Identifier . . . . . 5
Operating Modes . . . . . . . . . . . . . . 6
EXTERNAL CONTROLS AND POWER HOOKUP
Power Requirements . . . . . . . . . . . . . 7
Fuse . . . . . . . . . . . . . . . . . . . . 7
Front Panel Controls and Indicators . . . . . 7
INITIAL OPERATION
Initial Check & Set-up . . . . . . . . . . . 7
Call Sign Programming . . . . . . . . . . . 7
INTERNAL ADJUSTMENTS . . . . . . . . . . . . . . . . 8
PROGRAMMING
Programming From a PC . . . . . . . . . . . 9
Programming With Switches . . . . . . . . . . 9
Step By Step Programming . . . . . . . . . . 10
TERMINAL HOOKUP GUIDE . . . . . . . . . . . . . . . . 12
Addition Terminals for Model 1402D . . . . . 14
FIGURES Call Sign Programming Chart . . . . . . . . . 15
Rear Terminals . . . . . . . . . . . . . . . 16
Schematic Diagram . . . . . . . . . . . . . . 17
Component Layout . . . . . . . . . . . . . . 18
(C) RACOM, INC., 1992
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FCC WARNING
Because the 1402 uses digital electronics and a 3.59 MHz
oscillator, the FCC requires that this warning be printed.
Please notify RACOM if you detect any RF problems with the 1402.
This equipment generates, uses and can radiate radio frequency
energy and, if not installed and used in accordance with the
instructions manual, may cause interference to radio
communications. It has been tested and found to comply with the
limits for a Class A computing device pursuant to Subpart J of
Part 15 of FCC Rules which are designed to provide reasonable
protection against such interference when operated in a
commercial environment. Operation of this equipment in a
residential area may cause interference, in which case the user
at his own expense will be required to take whatever measures may
be required to correct the interference.
INSPECTION
After the instrument is unpacked, it should be carefully checked
for damages received in transit. If any shipping damage is
found, file a claim with the carrier and refer to the Warranty
Section of this manual.
Perform an electrical inspection as soon as possible after the
equipment is received.
RETURN FOR WARRANTY OR REPAIR
If the equipment is to be returned to RACOM for service or
repair, please follow the procedures listed below:
1 Contact RACOM for a "RETURN MATERIAL AUTHORIZATION NUMBER"
(RMA #)
By writing to: RACOM, INC.
RMA Division
5504 State Road
Cleveland, Ohio 44134
Or Telephone: [phone]
2 Attach a tag to the equipment. This tag should identify the
owner of the unit and give the serial number and the RMA number. *
3 Carefully repack the unit and mark the box with the RMA number. *
4 Then ship the unit to: RACOM, INC.
Repair Department
5504 State Road, Cleveland, Ohio 44134
* NOTE: No merchandise will be accepted by RACOM, INC without
an RMA number.
(C) RACOM, INC., 1992
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SPECIFICATIONS for Model 1402
Call Letters: Up to 12 letters, digits, "-" or "/" (for
repeaters). Optionally proceeded by DE (from).
Call Programming: Programmed with switches or by a cable
to a PC (personal computer).
Front Panel Features: TEST SWITCH for manual ID and testing.
SPEAKER SWITCH turns on internal speaker.
ACTIVE LED indicates when unit is identifying.
Output Impedance: 600 Ohm +/- 20 %
Output Level: Variable from -25 to -3 DBM
Solid State Transmitter
Keying Switch: Maximum 200 mA to ground with maximum .6 VDC
drop from maximum 200 VDC (or less) source.
Monitor Inputs: Receiver (Rx) COR monitor and transmitter (Tx)
keying monitor.
Receiver COR Monitor: Switch set to Active low or active high.
Transmitter Monitor: Active low. Usually controlled by push-to-talk
closure to ground. Also starts time period.
Rx and Tx Monitor Loading:
1 mA maximum at 0 VDC, 0 mA for voltages
above +5 VDC.
Rx and Tx Monitor Levels:
Digital low is defined as 0 to +1.2 VDC
Digital hi is defined as +3.5 to +75 VDC
Operating Modes: 1 Identifies after each time period.
2 Identifies after each transmission.
3 Identifies one time period after
beginning of a transmission.
4 Identifies at the beginning of a
transmission and again one time period
after start of the transmission.
Note: "Time Period" is the time the INTERVAL
TIMER is set to. Typically 15 Minutes.
The following items are programmed into the 1402 with its
switches or with the optional PC programming cable. The call
sign and all variables are stored in a removable EEPROM.
| Default | Programmable range
| Value |
-----------------------|-----------|----------------------------
Call Letters: | | Up to 12
Output Frequency: | 1080 Hz | 690 to 2020 Hz
Period Interval Timer: | 15 Min | 0 to 98 Minutes
Monitor Release Delay: | 3 Sec | 0 to 19 Seconds
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Code speed: Switch set from 10 to 40 Words/Minute
We recommend setting it to 24 W/Min.
Connections: Screw terminal strip.
Humidity: Up to 95% RH
Monitor Inhibit After
Identification: .4 seconds
Output Signwave
Distortion: 20% maximum
Output Noise: 50 db below rated output
Power Requirements: 8-20V AC-DC 200 mA
Size: Desk top - 8.5" wide x 1.75" high x 5.5" deep
Temperature Range: -20 degrees C to +80 degrees C
Weight: 2 lbs.
ADDITIONAL SPECIFICATIONS for Model 1402D
Audio Output: 600 ohm, balanced, DC blocked and isolated
from ground. Variable up to +3 DBM.
Relay Contacts: Two form "C" (DPDT) contacts rated at 2 Amps.
Audio Monitor: Input is 10K ohm impedance (min.) balanced,
DC blocked and isolated from ground.
Sensitivity is adjustable down to 40 mVAC.
OPTIONS for Models 1402 and 1402D
Part number Description
1402-PC Programming cable and software for a PC
1402-R EIA Rackmount 19" x 1.75"
1402-T 120 Vac Wall plug power transformer
1402-L 50 Character microprocessor for 1402 or 1402D
This must be programmed with option 1402-PCL
1402-PCL 50 character PC software and programming cable
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INTRODUCTION AND GENERAL FEATURES
The Racom Model 1402 is a sophisticated state of the art Morse
Code Station Identifier which is designed with the professional
communications specialist in mind. The 1402, when optioned
correctly, will interface easily to any communications system,
and will provide years of maintenance-free service. Low-power
consumption, high noise immunity CMOS logic circuits and
microprocessor are used throughout for dependable operation in
areas where RF radiation can cause havoc with lesser equipment.
Usage of a microprocessor approximated signwave completely
eliminates key clicks that are common to most identifiers. All
CMOS circuits have protected circuitry against static damage.
Racom products are built on 1/16" thick glass-epoxy printed
circuit boards, with all ICs mounted in sockets for ease of
service. The strict usage of name brand top quality components
and high degree of craftsmanship make RACOM the name to know in
the communications field. As a further assurance, RACOM station
identifiers are subjected to a pre-inspection, electronic
calibration, performance tests, a 48 hour cycling test (burn-in),
and a functional operation test prior to shipment.
USAGE OF THE RACOM 1402 IDENTIFIER
The 1402 identifier is capable of producing any Morse Code call
sign that has between one and twelve alphabetical or numerical
characters. The 1402 may be programmed with the Morse Code
characters A through Z, 0 through 9, the symbols / and - and a
"space" (no audio). Any of these Morse characters, in any
desired order, can be accessed by proper setting of a series of
subminiature switches located on the printed circuit board. The
twelve call letters may be optionally proceeded by "DE" (meaning
from).
The standard Model 1402 is capable of several distinct operating
modes which comply with FCC part 81 and 90 regulations. With a
wide variety of external hookup schemes, the 1402 can easily
function in these situations:*
1) Paging operations
2) Business Radios (mobile or base stations)
3) Local and remote control stations (repeaters)
4) Amateur radio stations
5) Marine Applications
6) Unmanned test stations or warning systems
7) Public Safety or emergency radio systems
* Always check specific FCC qualifications for your particular
station before using an automatic identifier.
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Operating Modes:
The standard 1402 will operate in four distinct modes. The 1402
has two built-in timers. The interval timer controls the time
interval or time period at which identifications take place
(usually about 15 minutes). The other timer is the monitor delay
timer. This timer will delay an identification until it reaches
it's set point (usually 2 to 5 seconds). It is reset to 0
whenever there is activity on any of the monitor inputs. This
timer keeps the 1402 from identifying on top of other traffic.
Mode 1: The unit will identify every time interval as set
by interval timer.
Mode 2: The unit will identify from 0 to 19 seconds after
transmission has ended.* This 0 to 19 second delay
time is called "Monitor Delay Time".
Mode 3: The unit will identify one time interval after the
transmitter has been keyed.* This time interval
is set by the interval timer. Grounding the
transmitter monitor terminal starts the timer.
Mode 4: The 1402 will identify over any audio at the
beginning of the transmission and again identify
one time interval after the transmitter was first
keyed.* This time interval is set by the interval
timer. Grounding the transmitter monitor terminal
starts the timer.
* Provided the "transmitter monitor" is connected to the transmitter.
NOTE: The "COR monitor" terminal and the "XMTR monitor" terminal
are active in all of the above modes and if either or both
terminals is given a "digital low" (less than 1.2 VDC), no
identification will take place until the "digital low"
resumes to a "digital high" (above 3.5 VDC).
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EXTERNAL CONTROLS AND POWER HOOKUP
Power Requirements:
The Model 1402 may be powered by 8-25 volts AC/DC which makes it
ideal for 12 volt battery operation. Power is applied between
terminals 1 and 2 of TB1 or to the power connector. These
terminals connect to a full wave bridge rectifier so the power
connections are not sensitive to polarity.
The option "T" 120 VAC wall plug transformer should be plugged
into the power jack or connected between terminals TB1-1 and
TB1-2.
Fuse:
The power fuse is located on the circuit board. This fuse
should be replaced with one of the same type and value.
Front Panel Controls and Indicators:
The following two switches and LED are mounted on the front panel.
SPEAKER: When this locking toggle switch is "up", an internal
monitor speaker is connected to the identifier's
audio circuit.
TEST: This is a momentary contact switch that will cause
identifier to identify, regardless of other
conditions, when momentarily toggled. This switch
is also used to program the 1402.
ACTIVE LED: During normal operation, this LED will flash during
the monitor delay period and light solid during
the identification period. When the 1402 is being
programmed, it will flash when data needs to be saved.
INITIAL OPERATION
Initial Check & Set-up:
Initial set-up of the Model 1402 will involve removing the top
cover, which is secured by four screws. Inspect the unit at this
time for any obvious damage. If everything looks proper, the
identifier may be connected to an appropriate power source;
depress the "speaker" switch. The identifier should send out the
Morse Code characters "DE", meaning "from". A newly purchased
unit will only emit the "DE" code because the call sign needs to
be programmed.
Call Sign Programming:
Call sign programming requires setting of switches for each Morse
Code character or the 1402 may be programmed from a PC (Personal
Computer) with its optional program cable and software.
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INTERNAL ADJUSTMENTS
Inside the 1402 there are two rotary dip switches (SW1 and SW2)
and one two section dip switch (SW3). These are dual purpose
switches.
For normal operation as an identifier, switch SW1 must be in
position "0" and the other switches function as indicated on this
page. When SW1 in a position other than "0" the 1402 is in the
programming mode and SW1 determines the address to be programmed.
The other switches determine the data to be programmed at the
address of SW1. Program is discussed on the following pages.
Audio Output Level - R28:
R28 controls the amplitude of audio output seen between
TB1-7 and TB1-8, for purposes of setting modulation or
deviation levels.
Audio Monitor Sensitivity - R2 (Model 1402D only):
This control adjusts how much receiver audio voltage is
required to trigger the audio monitor circuitry. Each
individual installation may require touching up of this
control to match it to the receiver's audio output level.
The important consideration is to see that hum and noise
does not falsely trigger the circuit.
Code Speed - SW2:
When the unit is in normal operation, switch SW2 controls
the code speed as follows: Code speed is in words per minute.
SW2 Position | 0 1 2 3 4 5 6 7 8 9
-------------|----------------------------------------
Code Speed | 40 30 24 20 17 14 13 12 11 10
Interval Timer Mode - SW3-1:
When the unit is in normal operation, switch SW3-1 controls
if the interval timer will cycle continuously or only be
started by transmitter monitor terminal activity.
On - Started by transmitter monitor activity (Mode 3)
Open - Runs continuously (Mode 1)
This switch must be closed or on for operation in modes
2, 3 or 4.
Receiver COR Monitor State - SW3-2:
When the unit is in normal operation, switch SW3-2 controls
the state of the receiver COR monitor terminal as follows:
If the COR is not connected this switch should be set "open"
On - COR is active high
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PROGRAMMING
The station's call letters must be programmed into the 1402. The
1402 also allows output frequency, interval timer, monitor
release delay and its mode to be customized programmed for the
system or to stay at our recommend values.
The 1402 may be programmed with its internal switches or it may
be programmed by a cable connected to a PC (personal computer).
For normal operation of the 1402 switch, SW1 must be in position
0. When the 1402 is being programmed, SW1 selects the address to
be programmed. Switches SW2 and SW3 determine the data to be
programmed at the address of specified by SW1.
Programming from a PC:
To program with a PC plug, the DB25 end of the programming cable
into one of the parallel printer ports (LPT1, LPT2 or LPT3) on
the PC and start the PC program marked "1402.BAT" on the 1402
disk. The program will instruct you as to when the other end of
the cable should be plugged into J2 on the 1402 and when to apply
power to the 1402.
Programming With Switches:
To program the 1402 with switches, it is necessary to set SW1 to
the address or position to be programmed. SW2 and SW3 are set to
the character or value to be programmed. The test switch is
pushed to do the actual programming. This needs to be done for
each position of SW1 that needs to be programmed. The active LED
will flash if the data selected with SW2 and SW3 does not match
the data at the address selected with SW1.
SW1 DESCRIPTION
ADDRESS
-------------------------------------------
0 Normal Operation
1 Call Letter Character position 1
2 - A Call Letter Character positions 2 to 10
B Call Letter Character position 11
C Call Letter Character position 12
D Monitor Delay in seconds
E Interval Time in Tens of Minutes
F Tone Frequency, "DE" and mode 4 selection
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Step By Step Programming:
1 Set SW1 to 1 for call letter position 1
2 Set SW2 and SW3 to code for Call Letter Character 1
See table 1 for settings
3 Push the test switch to save the settings
4 Repeat steps 1, 2 and 3 for each call letter character
5 If the call letters have 12 characters, skip to step 9
6 Set SW1 to the first not used call letter position
7 Set SW2 and SW3 to the END code (See table 1)
8 Push the test switch
9 Set SW1 to D
10 Set SW2 and SW3-1 to the monitor delay in seconds.
11 Push the test switch
12 Set SW1 to E
13 Set SW2 and SW3 to the desired interval time in
minutes
14 Push the test switch
15 Set SW1 to F
16 Set SW2 to the desired tone frequency, use SW3-1 to
select mode 4 and SW3-2 to add "DE" (from) if desired.
17 Push the test switch
18 Set SW1 to 0
19 1402 is now back in normal operation. Push the
test to hear the call letters.
20 Set SW2 to the desired code speed
21 Set SW3-1 to the Interval Timer start mode
If mode 1 identification is desired set this switch "open"
22 Set SW3-2 to the desired COR monitor state
If the COR is not connected this switch should be set "open"
Call character selection at addresses 1 to C:
SW3 SW3 | Position of SW2
-1 -2 | 0 1 2 3 4 5 6 7 8 9
-------------|--------------------------------------------------
Open Open | 0 1 2 3 4 5 6 7 8 9
On Open | A B C D E F G H I J
Open On | K L M N O P Q R S T
On On | U V W X Y Z / - space END
Programming in the "END" selection will tell the 1402 that this
is the end of the call and the identification will end at its
address.
Markings on SW3:
The switch SW3 is general made with a marking of either OPEN or
ON. Please remember that for this type of switch closed is the
same as on and open is the same as off.
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Monitor Delay Time Setting (Seconds) at address D:
SW3 | Position of SW2
-1 | 0 1 2 3 4 5 6 7 8 9
-------------|--------------------------------------------------
Open | 0 1 2 3 4 5 6 7 8 9
On | 10 11 12 13 14 15 16 17 18 19
SW3-2 Keep this switch in the open position.
Interval Time Setting (Minutes) at address E:
SW3 SW3 | Position of SW2
-1 -2 | 0 1 2 3 4 5 6 7 8 9
-------------|--------------------------------------------------
On On | 0 10 20 30 40 50 60 70 80 90
Open On | 3 13 23 33 43 53 63 73 83 93
On Open | 5 15 25 35 45 55 65 75 85 95
Open Open | 8 18 28 38 48 58 68 78 88 98
For mode 2 operation set the interval time to 0.
Tone Frequency Setting (Hz) and options at address F:
SW3 SW3 | Position of SW2
-1 -2 | 0 1 2 3 4 5 6 7 8 9
-------------|---------------------------------------------------
See below | 2020 1660 1410 1220 1080 970 870 800 740 690
SW3-1 Open Modes 1, 2 or 3. Also see the section on the
Interval Timer Mode on page 8. Set the interval
time (see above) to 0 form mode 2 operation.
SW3-1 On Mode 4. An identification takes place immediately
when the transmitter monitor terminal goes to the
low state. Then the interval timer will start and
another identification will follow. If the unit is
operated in mode 4 the Interval Timer Mode switch on
page 8 must be in the on position.
SW3-2 Open DE (from) is sent before the call letters.
SW3-2 On DE is not sent
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TERMINAL HOOKUP GUIDE
NOTE: All identifier terminals are referenced to ground
potential and all voltage measurements are made with
respect to ground (TB1-4).
POWER (TB1-1 and TB1-2)
Power of 8-25 volts AC/DC should be applied between terminals
TB1-1 and TB1-2 or to the power connector. These terminals
connect to a full wave bridge rectifier so the power connections
are not sensitive to polarity.
The optional 120 VAC ("T" option) wall plug transformer should be
plugged into the power jack or connected between terminals TB1-1
and TB1-2.
RECEIVER COR MONITOR (TB1-3):
This terminal has the purpose of inhibiting or delaying the
identifier from keying the transmitter until such a time that
there is no other traffic on the channel. Generally, this
terminal is connected to the receiver squelch circuit* in such a
fashion that a "digital low" (less than 1.2 VDC) applied to the
COR terminal indicates that there is traffic on the received
frequency, and the identifier will remain quiet until the voltage
resumes to a "digital high" (more than 3.5 VDC), indicating that
the channel is cleared of traffic. Some receivers have an
"active high" squelch voltage, where a "digital high" means the
channel is busy and a "digital low" means the channel is clear.
In this situation, switch SW3-1 may be used to invert the level
of this terminal. See "Option D's Audio Monitor" for further
information regarding COR hookups.
* May go to a "channel busy" light circuit if this is available
and electrically compatible.
GROUND (TB1-4):
Chassis ground and common for the Transmitter Monitor,
Transmitter Keying and Receiver Monitor terminals is TB1-4. This
terminal may also be used as power ground if the 1402 is to
operate off the base station's power.
TRANSMITTER KEYING (TB1-5):
This is the terminal that is used to automatically key the
transmitter while identification is taking place. The
transistorized terminal is capable of switching a 200 MA load (up
to +200 VDC open circuit) to ground. It cannot switch AC and it
cannot switch anything that is not "ground seeking". For these
applications, the "D" option must be used.
Whether the transistor or relay is used, the connection is made
at the push-to-talk (PTT) line of the transmitter.
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TRANSMITTER, TX or XMTR MONITOR (TB1-6):
This terminal has the function of letting the identifier know
when the transmitter is on the air. In almost all cases, the TX
monitor terminal is connected to the push-to-talk (PTT) line of
the transmitter.* The TX monitor terminal performs two
functions: (1) It inhibits identification until the transmitter
is free, and (2) It starts the interval timer when used in Modes
2, 3 or 4. The TX monitor is an "active low" circuit; i.e., the
transmitter is considered "on" or "keyed" when a "digital low"
(less than 1.2 VDC) is applied to the terminal, and "off" when a
"digital high" (more than 3.5 VDC) is applied.
* May connect to a "TX key" light circuit if available and
electrically compatible.
AUDIO OUTPUT (TB1-7): (See next page for Model 1402D)
This terminal is a ground-referenced medium audio output with a
600 ohm output impedance. It is designed to hook directly to
the microphone input lead of the transmitter. The identifier
audio circuitry produces a sine-wave with electronic circuitry to
prevent key clicks. Audio output amplitude is varied by
adjusting R28. Generally, the output level should be adjusted for
40% deviation, or 2 KHz on a 5 KHz system.
In some cases, a resistor of 10K or greater Ohms must be placed
in series with the audio lead to ease adjustment of deviation and
to reduce loading.
AUDIO GROUND (TB1-8): (See next page for Model 1402D)
TB1-8 is the ground that should be used for audio.
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ADDITION TERMINALS for Model 1402D
RELAY CONTACTS (TB1-9, 10, 11); (TB1-12, 13, 14):
These six terminals comprise two sets of SPDT relay contacts.
The relay contacts close and remain closed for the entire
duration of the identification period. One set of contacts may
be used to key the transmitter and the other set may be used to
connect audio into the transmitter microphone circuit.
These relay contacts break down as follows:
TB1-9 N. C. TB1-12 N. C.
TB1-10 Common pole TB1-13 Common pole
TB1-11 N. O. TB1-14 N. O.
AUDIO OUTPUT (TB1-7 and TB1-8):
This audio output is transformer-coupled, DC blocked and
electrically isolated from the chassis. Approximately 100 volts
may be placed across these terminals without damage. The output
is a sine-wave 600 OHM impedance and its output is variable with
R28.
AUDIO MONITOR (TB1-15 and TB1-16):
The audio monitor is designed to connect directly across the
receiver's volume control terminals (high side and ground) or to
a standard 600 OHM audio transmission line.* Its 10K OHM input
impedance allows for relatively minimal audio power losses. The
function of the audio monitor is to keep a watch on receiver
activity and to prevent the identifier from keying the
transmitter until the channel is clear. Its function is much
like that of the COR monitor terminal except that it is audio-
controlled instead of DC-controlled.
The audio monitor needs about 40mVAC to trigger, which is
considerably less than what is normally found on audio lines. The
sensitivity of this circuit can be adjusted by R2. Some care
must be taken in making this adjustment so that hum and noise
will not falsely trigger the circuit. The audio monitor
terminals are transformer-coupled, DC blocked and electrically
isolated from the chassis. Approximately 200 VDC may be placed
across the terminals without damage.
*NOTE: Some installations may dictate hooking the audio monitor
to the receiver speaker terminals for an audio source.
This is generally not recommended because adjusting
station volume control too low will defeat the purpose of
the monitor and risk FCC citation.
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