Lectrosonics SMWB/E06 User manual

SMWB Series
Wireless Microphone Transmitters and Recorders
SMWB, SMDWB, SMWB/E01, SMDWB/E01, SMWB/E06, SMDWB/E06, SMWB/E07-941,
SMDWB/E07-941, SMWB/X, SMDWB/X
Featuring
Digital Hybrid Wireless® Technology
US Patent 7,225,135
INSTRUCTION MANUAL
Rio Rancho, NM, USA
www.lectrosonics.com
Fill in for your records:
Serial Number:
Purchase Date:
SMWB SMDWB

SMWB Series
LECTROSONICS, INC.
2
Introduction
The design of the SMWB transmitter delivers the ad-
vanced technology and features of Digital Hybrid Wire-
less®in a Lectrosonics belt-pack transmitter at a modest
cost. Digital Hybrid Wireless®combines a 24-bit digital
audio chain with an analog FM radio link to eliminate a
compandor and its artifacts, yet preserve the extended
operating range and noise rejection of the nest analog
wireless systems.
The housing is a rugged, machined aluminum package
with a standard Lectrosonics 5-pin input jack for use with
electret lavaliere mics, dynamic mics, musical instrument
pickups and line level signals. The LEDs on the keypad
allow quick and accurate level settings without having to
view the receiver. The unit is powered by AA batteries,
one battery in the SMWB and two in the SMDWB. The
antenna port uses a standard 50 ohm SMA connector.
Switching power supplies provide constant voltages to
the transmitter circuits from the beginning to the end of
battery life, with output power remaining constant over
the life of the battery. The input amplier uses an ultra
low noise op amp. Input gain is adjustable over a 44 dB
range, with a DSP-controlled dual envelope input limiter
providing a clean 30 dB range to prevent overload from
signal peaks.
About Digital Hybrid Wireless®
All wireless links suer from channel noise to some
degree, and all wireless microphone systems seek to
minimize the impact of that noise on the desired sig-
nal. Conventional analog systems use compandors for
enhanced dynamic range, at the cost of subtle artifacts
(known as “pumping” and “breathing”). Wholly digital
systems defeat the noise by sending the audio informa-
tion in digital form, at the cost of some combination of
power, bandwidth, operating range and resistance to
interference.
The Lectrosonics Digital Hybrid Wireless system over-
comes channel noise in a dramatically new way, digitally
encoding the audio in the transmitter and decoding it in
the receiver, yet still sending the encoded information
via an analog FM wireless link. This proprietary algorithm
is not a digital implementation of an analog compandor
but a technique which can be accomplished only in the
digital domain.
Since the RF link between transmitter and receiver is
FM, channel noise will increase gradually with increased
operating range and weak signal conditions, however,
the Digital Hybrid Wireles system handles this situation
elegantly with rarely audible audio artifacts as the receiv-
er approaches its squelch threshold.
In contrast, a purely digital system tends to drop the
audio suddenly during brief dropouts and weak signal
conditions. The Digital Hybrid Wireless system simply
encodes the signal to use a noisy channel as eciently
and robustly as possible, yielding audio performance
that rivals that of purely digital systems, without the
power, noise and bandwidth problems inherent in digital
Table of Contents
Introduction............................................................................ 2
About Digital Hybrid Wireless®.............................................................................2
Servo Bias Input and Wiring............................................... 3
DSP-controlled Input Limiter.............................................. 3
Recorder function ............................................................... 3
Compatibility withmicroSDHC memory cards.................... 3
Features.................................................................................. 4
Battery Status LED Indicator.............................................. 4
Menu Shortcuts .................................................................. 4
IR (infrared) Sync ................................................................ 4
Battery Installation.............................................................. 5
Formatting SD Card .............................................................. 5
IMPORTANT ......................................................................... 5
iXML HEADER SUPPORT................................................... 5
Turning Power ON ................................................................. 6
Short Button Press ............................................................. 6
Long Button Press.............................................................. 6
Menu Shortcuts .................................................................. 6
Transmitter Operating Instructions ..................................... 7
Recorder Operating Instructions ......................................... 7
SMWB Main Menu ................................................................. 8
SMWB Power Button Menu.................................................. 9
Setup Screen Details ............................................................ 10
Locking/Unlocking Changes to Settings ........................... 10
Main Window Indicators..................................................... 10
Connecting the Signal Source............................................ 10
Turning Control Panel LEDs ON/OFF................................. 10
Helpful Features on Receivers ........................................... 10
Files ..................................................................................... 10
Record or Stop ................................................................... 11
Adjusting the Input Gain..................................................... 11
Selecting Frequency........................................................... 11
Selecting Frequency Using Two Buttons........................... 12
About Overlapping Frequency Bands................................ 12
Selecting the Low Frequency Roll-off................................ 12
Selecting the Compatibility (Compat) Mode ..................... 12
Selecting Step Size............................................................. 13
Selecting Audio Polarity (Phase)........................................ 13
Setting Transmitter Output Power ..................................... 13
Setting Scene and Take Number........................................ 13
Recorded File Naming ....................................................... 13
SD Info................................................................................. 13
Restoring Default Settings ................................................. 13
5-Pin Input Jack Wiring......................................................... 14
Microphone Cable Termination
for Non-Lectrosonics Microphones ............................. 15
Input Jack Wiring for Dierent Sources .............................. 16
Microphone RF Bypassing................................................. 17
Line Level Signals ............................................................... 17
Firmware Update ................................................................... 18
Recovery Process ................................................................. 19
Declaration of Conformity .................................................... 19
Silver Paste on SM Series Transmitter Thumbscrews....... 20
Straight Whip Antennas ........................................................ 21
Supplied Accessories............................................................ 22
Optional Accessories ............................................................ 23
LectroRM................................................................................ 24
Specications ........................................................................ 25
Troubleshooting..................................................................... 26
Service and Repair ................................................................ 28
Returning Units for Repair.................................................. 28

Digital Hybrid Wireless Belt-Pack Transmitters
Rio Rancho, NM 3
transmission. Because it uses an analog FM link, Digital
Hybrid Wireless enjoys all the benets of conventional FM
wireless systems, such as excellent range, ecient use
of RF spectrum, and long battery life.
Servo Bias Input and Wiring
The input preamp is a unique design that delivers audible
improvements over conventional transmitter inputs. Two
dierent microphone wiring schemes are available to
simplify and standardize the conguration. Simplied
2-wire and 3-wire congurations provide several arrange-
ments designed for use only with servo bias inputs to
take full advantage of the preamp circuitry.
A line level input wiring provides an extended frequency
response with an LF roll-o at 35 Hz for use with instru-
ments and line level signal sources.
DSP-controlled Input Limiter
The transmitter employs a digitally-controlled analog
audio limiter prior to the analog-to-digital converter.
The limiter has a range greater than 30 dB for excellent
overload protection. A dual release envelope makes the
limiter acoustically transparent while maintaining low
distortion. It can be thought of as two limiters in series,
connected as a fast attack and release limiter followed
by a slow attack and release limiter. The limiter recovers
quickly from brief transients, so that its action is hidden
from the listener, but recovers slowly from sustained high
levels to keep audio distortion low and preserve short
term dynamic changes in the audio.
Recorder function
The SMWB has a built in recording function for use in
situations where RF may not be possible or to work as a
stand alone recorder. The record function and transmit
functions are exclusive of each other - you cannot record
AND transmit at the same time. When the unit is trans-
mitting and recording is turned on, the audio in the RF
transmission will stop, but the battery status will still be
sent to the receiver.
The recorder samples at 44.1kHz rate with a 24 bit
sample depth. (the rate was selected due to the required
44.1kHz rate used for the digital hybrid algorithm). The
micro SDHC card also oers easy rmware update capa-
bilities without the need for a USB cable or driver issues.
Compatibility with
microSDHC memory cards
Please note that the SMWB and SMDWB are designed
for use with microSDHC memory cards. There are sev-
eral types of SD card standards (as of this writing) based
on capacity (storage in GB).
SDSC: standard capacity, up to and including 2 GB – DO
NOT USE!
SDHC: high capacity, more than 2 GB and up to and
including 32 GB – USE THIS TYPE.
SDXC: extended capacity, more than 32 GB and up to
and including 2 TB – DO NOT USE!
SDUC: extended capacity, more than 2TB and up to and
including 128 TB – DO NOT USE!
The larger XC and UC cards use a dierent formatting
method and bus structure and are NOT compatible with
the recorder. These are typically used with later genera-
tion video systems and cameras for image applications
(video and high resolution, high speed photography).
ONLY microSDHC memory cards should be used. They
are available in capacities from 4GB to 32GB. Look for
the Speed Class 10 cards (as indicated by a C wrapped
around the number 10), or the UHS Speed Class I cards
(as indicated by the numeral 1 inside a U symbol). Also
note the microSDHC Logo.
If you are switching to a new brand or source of card, we
always suggest testing rst before using the card on a
critical application.
The following markings will appear on compatible
memory cards. One or all of the markings will appear on
the card housing and the packaging.
UHS Speed Class I
Stand-alone
Speed Class 10
UHS Speed Class 1
UHS Speed Class I
Accompanying
microSDHC logo
microSDHC Logo is a trademark of SD-3C, LLC

SMWB Series
LECTROSONICS, INC.
4
Battery Status LED Indicator
AA batteries can be used to power the transmitter.
The LED labeled BATT on the keypad glows green when
the batteries are good. The color changes to red when
the battery voltage drops down and stays red through
most of the battery life. When the LED begins to blink
red, there will be only a few minutes remaining.
The exact point at which the LEDs turn red will vary with
battery brand and condition, temperature and power
consumption. The LEDs are intended to simply catch
your attention, not to be an exact indicator of remaining
time.
A weak battery will sometimes cause the LED to glow
green immediately after the transmitter is turned on, but
it will soon discharge to the point where the LED will turn
red or the unit will turn o completely.
Some batteries give little or no warning when they
are depleted. If you wish to use these batteries in the
transmitter, you will need to manually keep track of the
operating time to prevent interruptions caused by dead
batteries.
Start with a fully charged battery, then measure the time
it takes for the Power LED to go out completely.
NOTE: The battery timer feature in many
Lectrosonics receivers is very helpful in
measuring battery runtime. Refer to the receiver
instructions for details on using the timer.
Menu Shortcuts
From the Main/Home Screen, the following shortcuts are
available:
• Record: Press the MENU/SEL + UP arrow simulta-
neously
• Stop Recording: Press the MENU/SEL + DOWN
arrow simultaneously
NOTE: The shortcuts are only available from
the main/home screen AND when a microSDHC
memory card is installed.
IR (infrared) Sync
The IR port is for quick setup using a receiver with this
function available. IR Sync will transfer the settings for
frequency, step size and compatibility mode from the
receiver to the transmitter. This process is initiated by
the receiver. When the sync function is chosen on the
receiver, hold the IR port of the transmitter near the IR
port of the receiver. (There is no menu item available on
the transmitter to initiate the sync.)
NOTE: If a mismatch exists between the receiver
and transmitter, an error message will appear on
the transmitter LCD stating what the problem is.
Modulation
Indicators Battery
Status LED
-40 -20 0
REC
microSDHC
memory card
port
microSDHC
memory card
port
Audio
Input
Jack
Antenna
Port
IR (Infrared) Port
Antenna
Port
Audio
Input
Jack
IR (Infrared) Port

Digital Hybrid Wireless Belt-Pack Transmitters
Rio Rancho, NM 5
Battery Installation
The transmitter is powered by AA batteries. (The SMWB
requires one AA battery and the SMDWB requires two.)
We recommend using lithium for longest life.
WARNING: Risk of explosion if the battery is
replaced by an incorrect type.
Because some batteries run down quite abruptly, using
the Power LED to verify battery status will not be reliable.
However, it is possible to track battery status using the
battery timer function available in Lectrosonics Digital
Hybrid Wireless receivers.
The battery door opens by simply unscrewing the knurled
knob part way until the door will rotate. The door is also
easily removed by unscrewing the knob completely,
which is helpful when cleaning the battery contacts. The
battery contacts can be cleaned with alcohol and a cot-
ton swab, or a clean pencil eraser. Be sure not to leave
any remnants of the cotton swab or eraser crumbs inside
the compartment.
A small pinpoint dab of silver conductive grease* on the
thumbscrew threads can improve battery performance
and operation. See page 20. Do this if you experience a
drop in battery life or an increase in operating tempera-
ture.
If you are unable to locate a supplier of this type of
grease - a local electronics shop for example - contact
the factory for a small maintenance vial.
Insert the batteries according to the markings on the
back of the housing. If the batteries are inserted incor-
rectly, the door may close but the unit will not operate.
Formatting SD Card
New microSDHC memory cards come pre-formatted
with a FAT32 le system which is optimized for good
performance. The PDR relies on this performance and
will never disturb the underlying low level formatting of
the SD card. When the SMWB/SMDWB “formats” a card,
it performs a function similar to the Windows “Quick
Format” which deletes all les and prepares the card for
recording. The card can be read by any standard com-
puter but if any write, edit or deletions are made to the
card by the computer, the card must be re-formatted with
the SMWB/SMDWB to prepare it again for recording. The
SMWB/SMDWB never low level formats a card and we
strongly advise against doing so with the computer.
To format the card with the SMWB/SMDWB, select
Format Card in the menu and press MENU/SEL on the
keypad.
WARNING: Do not perform a low level format (complete
format) with a computer. Doing so may render the memo-
ry card unusable with the SMWB/SMDWB recorder.
With a windows based computer, be sure to check the
quick format box before formatting the card.
With a Mac, choose MS-DOS (FAT).
IMPORTANT
The formatting of the SD card sets up contiguous sectors
for maximum eciency in the recording process. The
le format utilizes the BEXT (Broadcast Extension) wave
format which has sucient data space in the header for
the le information and the time code imprint.
The SD card, as formatted by the SMWB/SMDWB re-
corder, can be corrupted by any attempt to directly edit,
change, format or view the les on a computer.
The simplest way to prevent data corruption is to copy
the .wav les from the card to a computer or other Win-
dows or OS formatted media FIRST. Repeat – COPY
THE FILES FIRST!
Do not rename les directly on the SD card.
Do not attempt to edit the les directly on the SD card.
Do not save ANYTHING to the SD card with a computer
(such as the take log, note les etc) - it is formatted for
SMWB/SMDWB recorder use only.
Do not open the les on the SD card with any third party
program such as Wave Agent or Audacity and permit a
save.In Wave Agent, do not IMPORT - you can OPEN
and play it but do not save or Import - Wave Agent will
corrupt the le.
In short - there should be NO manipulation of the data
on the card or addition of data to the card with anything
other than an SMWB/SMDWB recorder.Copy the les to
a computer, thumb drive, hard drive, etc. that has been
formatted as a regular OS device FIRST - then you can
edit freely.
iXML HEADER SUPPORT
Recordings contain industry standard iXML chunks in the
le headers, with the most commonly used elds lled in.

SMWB Series
LECTROSONICS, INC.
6
Turning Power ON
Short Button Press
When the unit is turned o, a short press of the power
button will turn the unit on in the Standby Mode with
the RF output turned o.
A
494.500
-40 -20 0
E
b 19
RF indicator blinks
To enable RF output from the Standby Mode, press the
Power button, select Rf On? option, then select yes.
Resume
Pwr Off
Rf On?
AutoOn?
Rf On?
No
Ye s
Long Button Press
When the unit is turned o, a long press of the power
button will start a countdown to turn the unit on with the
RF output turned on. Continue to hold the button until
the countdown is complete.
Hold
for
Rf On
...3
A
503.800
-40 -20 0
E
b 19
RF indicator not blinking
Hold power
button until
the counter
reaches 3
If the button is released before the countdown is com-
pleted, the unit will power up with the RF output turned
o.
Power Button Menu
When the unit is already turned on, the Power Button is
used to turn the unit o, or to access a setup menu.
A long press of the button turns the power o.
A short press of the button opens a menu for the fol-
lowing setup options. Select the option with the UP and
DOWN arrow buttons then press MENU/SEL.
• Resume returns the unit to the previous screen
and operating mode
• Pwr O turns the unit o
• Rf On? turns the RF output on or o
• AutoOn? selects whether or not the unit will turn
on automatically after a battery change
• Blk606? - enables Block 606 legacy mode for use
with Block 606 receivers.
• Remote enables or disables the audio remote con-
trol (dweedle tones)
• Bat Type selects the type of battery in use
• Backlit sets the duration of the LCD backlight
• Clock sets the Year/Month/Day/Time
• Locked disables the control panel buttons
• LED O enables/disables control panel LEDs
NOTE: The Blk606? feature is only available on
Bands B1, B2 or C1.
Menu Shortcuts
From the Main/Home Screen, the following shortcuts are
available:
• Record: Press the MENU/SEL + UP arrow simulta-
neously
• Stop Recording: Press the MENU/SEL + DOWN
arrow simultaneously
NOTE: The shortcuts are only available from
the main/home screen AND when a microSDHC
memory card is installed.

Digital Hybrid Wireless Belt-Pack Transmitters
Rio Rancho, NM 7
Transmitter Operating
Instructions
• Install battery(s)
• Turn power on in the Standby mode (see previous
section)
• Connect microphone and place it in the position
where it will be used.
• Have the user talk or sing at the same level that
will be used in the production, and adjust the input
gain so that the -20 LED blinks red on louder
peaks.
Gain
Freq
Rolloff
Compat -40 -20 0
Gain
25
Use the UP and DOWN
arrow buttons to adjust
the gain until the -20
LED blinks red on
louder peaks
Signal Level -20 LED -10 LED
Less than -20 dB O O
-20 dB to -10 dB Green O
-10 dB to +0 dB Green Green
+0 dB to +10 dB Red Green
Greater than +10 dB Red Red
• Set the frequency and compatibility mode to match
the receiver.
• Turn the RF output on with the Rf On? item in the
power menu, or by turning the power o and then
back on while holding the power button in and
waiting for the counter to reach 3.
Recorder Operating
Instructions
• Install battery(s)
• Insert microSDHC memory card
• Turn power on
• Format memory card
• Connect microphone and place it in the position
where it will be used.
• Have user talk or sing at the same level that will be
used in the production, and adjust the input gain
so that the -20 LED blinks red on louder peaks
Gain
Freq.
Rolloff
Compat -40 -20 0
Gain
25
Use the UP and DOWN
arrow buttons to adjust
the gain until the -20
LED blinks red on
louder peaks
Signal Level -20 LED -10 LED
Less than -20 dB O O
-20 dB to -10 dB Green O
-10 dB to +0 dB Green Green
+0 dB to +10 dB Red Green
Greater than +10 dB Red Red
• Press MENU/SEL and choose Record from the
menu
A
503.800
-40 -20 0
E
b 19
REC
Files
Format
Record
Gain
RECORD-
ING
• To stop recording, press MENU/SEL and choose
Stop; the word SAVED appears on the screen
SAVED
Files
Format
Stop
Gain
A
503.800
-40 -20 0
E
b 19
To play back the recordings, remove the memory card
and copy the les onto a computer with video or audio
editing software installed.

SMWB Series
LECTROSONICS, INC.
8
SMWB Main Menu
Freq.
Rolloff
Compat
StepSiz
Phase
TxPower
SEL
BACK
Freq Press SEL to
select desired
adjustment
Use arrow keys
to select desired
frequency
SEL
BACK
SEL
BACK
Compat Select from
listing
Use arrow keys to select
compatibility mode
SEL
BACK
Use arrow keys to select
frequency step size
100 kHz
25 kHz
StepSiz
SEL
BACK
Use arrow keys to select
audio output polarity
Pos.
Neg.
Phase
SEL
BACK
Use arrow keys to select
RF power output
25mW
50 mW
100 mW
TxPower
Rolloff
70 Hz
Use arrow keys to
select input gain
Select from
listing
b 21
80
550.400
Nu Hybrid
From the Main Window press MENU/SEL.
Use the UP/Down arrow keys to select the item.
Files SEL
BACK
Files 0014A000
0013A000
Use arrow keys to
select file in list
Select from
listing
Format SEL
BACK
Use arrow keys to initiate
formatting the memory card
No
Yes
Format?
(erases)
Gain SEL
BACK
Gain 22 Use arrow keys to
select input gain
Select from
listing
Record SEL
BACK
RECORD-
ING OR Stop SEL
BACK
SAVED
Sc&Take
Takes
SEL
BACK
Use arrow keys to
advance scene & take
Scene 5
Take 3
Sc&Take
SEL
BACK
Use arrow keys to select
scene & take
S05 T004
S05 T005
S05 T006
Takes
Default SEL
BACK
Use arrow keys to return recorder
to default factory settings
No
Yes
Default
settings
Naming SEL
BACK
Use arrow keys to select
file naming method
Seq #
Clock
Naming
SD Info SEL
BACK
[SMWB ]
Max Rec
E.........................F
0/ 14G
Battery remaining
Storage used
Storage capacity
Available recording time (H : M : S)
Press SEL to
select desired
adjustment

Digital Hybrid Wireless Belt-Pack Transmitters
Rio Rancho, NM 9
SMWB Power Button Menu
Rf On?
BatType
Remote
Press SEL to return to
the previous screen
SEL
BACK
Use arrow keys to
turn RF signal on/off
No
Yes
Rf On?
SEL
BACK
Use arrow keys to
choose battery type
Alk.
Lith.
BatType
SEL
BACK
Use arrow keys to
enable/disable remote
Enable
Ignore
Remote
From the Main Window press the power button.
Use the UP/DOWN arrow keys to select the item.
Resume
Pwr Off
Press SEL to turn the
power off
AutoOn?
SEL
BACK
ProgSw Use arrow keys to enable
auto power restore
No
Yes
1.5 V
Backlit
SEL
BACK
Backlit Use arrow keys to select
LCD backlight duration
On
30 sec
5 sec
Off
About
Locked
SEL
BACK
About
SMWB
v1.03
Displays firmware version
SEL
BACK
Use arrow keys to
lock/unlock keypad
Yes
No
Locked?
LED Off
SEL
BACK
LEDs Use arrow keys to turn
LEDs on or off
On
Off
Clock
SEL
BACK
Clock
2021
07 / 26
17: 19 : 01
Year
Month / Day
Hour : Minute: Second
The Seconds field shows
“running seconds”
and can be edited.

SMWB Series
LECTROSONICS, INC.
10
Setup Screen Details
Locking/Unlocking Changes to Settings
Changes to the settings can be locked in the Power But-
ton Menu.
Locked?
No
Ye s
LOCKED
(menu to
unlock)
Clock
Locked
LED Off
About
When changes are locked, several controls and actions
can still be used:
• Settings can still be unlocked
• Menus can still be browsed
• When locked, POWER CAN ONLY BE TURNED
OFF by removing the batteries.
Main Window Indicators
The Main Window displays the block number, Standby or
Operating mode, operating frequency, audio level, bat-
tery status and programmable switch function. When the
frequency step size is set at 100 kHz, the LCD will look
like the following.
474.500
-40 -20 0
b 470
2C
Block number
Frequency (MHz)
Frequency
(hex number)
Operating mode
Battery status
Audio level
When the frequency step size is set to 25 kHz, the hex
number will appear smaller and may include a fraction.
474.525
-40 -20 0
b 470
1
4
2C Note that the
frequency has
increased by 25
kHz from the upper
example.
Fraction
1/4 = .025 MHz
1/2 = .050 MHz
3/4 = .075 MHz
Changing the step size never changes the frequency. It
only changes the way the user interface works. If the fre-
quency is set to a fractional increment between even 100
kHz steps and the step size is changed to 100 kHz, the
hex code will be replaced by two asterisks on the main
screen and the frequency screen.
494.525
-40 -20 0
b 19 Freq.
b 19
494.525
Frequency set to fractional 25 kHz step,
but step size changed to 100 kHz.
Connecting the Signal Source
Microphones, line level audio sources, and instruments
can be used with the transmitter. Refer to the section
entitled Input Jack Wiring for Dierent Sources for
details on the correct wiring for line level sources and
microphones to take full advantage of the Servo Bias
circuitry.
Turning Control Panel LEDs ON/OFF
From the main menu screen, a quick press of the UP
arrow button turns the control panel LEDs on. A quick
press of the DOWN arrow button turns them o. The but-
tons will be disabled if the LOCKED option is selected in
the Power Button menu.
The control panel LEDs can also be turned on and o
with the LED O option in the Power Button menu.
Helpful Features on Receivers
To aid in nding clear frequencies, several Lectrosonics
receivers oer a SmartTune feature that scans the tuning
range of the receiver and displays a graphical report that
shows where RF signals are present at dierent levels,
and areas where there is little or no RF energy present.
The software then automatically selects the best channel
for operation.
Lectrosonics receivers equipped with an IR Sync func-
tion allow the receiver to set frequency, step size and
compatibility modes on the transmitter via an infrared link
between the two units.
Files
Files
0007A000
0002A000
0003A000
0004A000
0005A000
0006A000
Files
Format
Record
Gain
Select recorded
les on
microSDHC
memory card.

Digital Hybrid Wireless Belt-Pack Transmitters
Rio Rancho, NM 11
Format
Files
Format
Record
Gain
Formats the microSDHC memory card.
WARNING: This function erases
any content on the microSDHC
memory card.
Record or Stop
Begins recording or stops recording. (See page 7.)
Adjusting the Input Gain
The two bicolor Modulation LEDs on the control panel
provide a visual indication of the audio signal level enter-
ing the transmitter. The LEDs will glow either red or green
to indicate modulation levels as shown in the following
table.
Signal Level -20 LED -10 LED
Less than -20 dB O O
-20 dB to -10 dB Green O
-10 dB to +0 dB Green Green
+0 dB to +10 dB Red Green
Greater than +10 dB Red Red
NOTE: Full modulation is achieved at 0 dB,
when the “-20” LED first turns red. The limiter
can cleanly handle peaks up to 30 dB above this
point.
It is best to go through the following procedure with the
transmitter in the standby mode so that no audio will
enter the sound system or recorder during adjustment.
1) With fresh batteries in the transmitter, power the
unit on in the standby mode (see previous section
Turning Power ON and OFF).
2) Navigate to the Gain setup screen.
Gain
Freq
Rolloff
Compat -40 -20 0
Gain
25
3) Prepare the signal source. Position a microphone
the way it will be used in actual operation and have
the user speak or sing at the loudest level that will
occur during use, or set the output level of the in-
strument or audio device to the maximum level that
will be used.
4) Use the and arrow buttons to adjust the gain
until the –10 dB glows green and the –20 dB LED
starts to icker red during the loudest peaks in the
audio.
5) Once the audio gain has been set, the signal can
be sent through the sound system for overall level
adjustments, monitor settings, etc.
6) If the audio output level of the receiver is too high
or low, use only the controls on the receiver to
make adjustments. Always leave the transmitter
gain adjustment set according to these instruc-
tions, and do not change it to adjust the audio
output level of the receiver.
Selecting Frequency
The setup screen for frequency selection oers several
ways to browse the available frequencies.
Freq.
b 19
494.500
51
Gain
Freq
Rolloff
Compat
Press MENU/
SEL to select
one of four
elds to make
adjustments
Each eld will step through the available frequencies in a
dierent increment. The increments are also dierent in
the 25 kHz mode from the 100 kHz mode.
Freq.
b 19
494.500
51
Freq.
b 19
494.500
51
These two elds step in 25 kHz
increments when the step size is 25
kHz and 100 kHz increments when
the step size is 100 kHz.
Freq.
b 19
494.500
51
Freq.
b 19
494.500
51
These two elds
always step in the
same increments
1 MHz steps
1 block steps
A fraction will appear next to the hex code in the setup
screen and in the main window when the frequency ends
in .025, .050 or .075 MHz.
474.525
-40 -20 0
b 470
1
4
51
Freq.
b 19
494.525
511
4
Fraction appears
next to hex code
in 25 kHz mode
All Lectrosonics Digital Hybrid Wireless®receivers provide
a scanning function to quickly and easily nd prospec-
tive frequencies with little or no RF interference. In other
cases, a frequency may be specied by ocials at a
large event such as the Olympics or a major league ball

SMWB Series
LECTROSONICS, INC.
12
game. Once the frequency is determined, set the trans-
mitter to match the associated receiver.
Selecting Frequency Using Two Buttons
Hold the MENU/SEL button in, then use the and ar-
row buttons for alternate increments.
NOTE: You must be in the FREQ menu to access
this feature. It is not available from the main/
home screen.
Freq.
b 19
494.500
51
1 block steps
1.6 MHz steps to
nearest 100 kHz
channel
10 MHz steps 100 kHz steps
to next 100
kHz channel
100 kHz Mode
Freq.
b 19
494.525
511
4
1 block steps
1.6 MHz steps
10 MHz steps
25 kHz steps
25 kHz Mode
If the Step Size is 25 kHz with the frequency set between
even 100 kHz steps and the Step Size is then changed to
100 kHz, the mismatch will cause the hex code to display
as two asterisks.
494.525
-40 -20 0
b 19
Freq.
b 19
494.500
**
Step Size and
Frequency
mismatch
About Overlapping Frequency Bands
When two frequency bands overlap, it is possible to
select the same frequency at the upper end of one and
the lower end of the other. While the frequency will be the
same, the pilot tones will be dierent, as indicated by the
hex codes that appear.
In the following examples, the frequency is set to
494.500 MHz, but one is in band 470 and the other in
band 19. This is done intentionally to maintain compat-
ibility with receivers that tune across a single band. The
band number and hex code must match the receiver to
enable the correct pilot tone.
Freq.
b470
494.500
F4
Freq.
b 19
494.500
51
Make sure the
band number and
hex code match
the receiver setting
Selecting the Low Frequency Roll-o
It is possible that the low frequency roll-o point could
aect the gain setting, so it’s generally good practice to
make this adjustment before adjusting the input gain. The
point at which the roll-o takes place can be set to:
• LF 35 35 Hz • LF 100 100 Hz
• LF 50 50 Hz • LF 120 120 Hz
• LF 70 70 Hz • LF 150 150 Hz
The roll-o is often adjusted by ear while monitoring the
audio.
.
Rolloff
Compat
StepSiz
Phase
Rolloff
70 Hz
Selecting the Compatibility (Compat)
Mode
When used with a Lectrosonics Digital Hybrid Wireless®
receiver, the best audio quality will be achieved with the
system set to the Nu Hybrid compatibility mode.
Rolloff
Compat
StepSiz
Phase
Compat
IFB
Use the UP and DOWN arrows to select the desired
mode, then press the BACK button twice to return to the
Main Window.
Compatibility modes are as follows:
Receiver Models LCD menu item
SMWB/SMDWB:
• Nu Hybrid: Nu Hybrid
• Mode 3:* Mode 3
• IFB Series: IFB Mode
Mode 3 works with certain non-Lectrosonics models.
Contact the factory for details.
NOTE: If your Lectrosonics receiver does not
have Nu Hybrid mode, set the receiver to Euro
Digital Hybrid Wireless® (EU Dig. Hybrid).
Receiver Models LCD menu item
SMWB/SMDWB/E01:
• Digital Hybrid Wireless®: EU Hybr
• Mode 3: Mode 3*
• IFB Series: IFB Mode
* Mode works with certain non-Lectrosonics models.
Contact the factory for details.

Digital Hybrid Wireless Belt-Pack Transmitters
Rio Rancho, NM 13
Receiver Models LCD menu item
SMWB/SMDWB/X:
• Digital Hybrid Wireless®: NA Hybr
• Mode 3:* Mode 3
• 200 Series: 200 Mode
• 100 Series: 100 Mode
• Mode 6:* Mode 6
• Mode 7:* Mode 7
• IFB Series: IFB Mode
Modes 3, 6 and 7 work with certain non-Lectrosonics
models. Contact the factory for details.
Selecting Step Size
This menu item allows frequencies to be selected in
either 100 kHz or 25 kHz increments.
Rolloff
Compat
StepSiz
Phase
StepSiz
100 kHz
25 kHz
StepSiz
100 kHz
25 kHz
If the desired frequency ends in .025, .050 or .075 MHz,
the 25 kHz step size must be selected.
Selecting Audio Polarity (Phase)
Audio polarity can be inverted at the transmitter so the
audio can be mixed with other microphones without
comb ltering. The polarity can also be inverted at the
receiver outputs.
Rolloff
Compat
StepSiz
Phase
Phase
Pos.
Neg.
Setting Transmitter Output Power
The output power can be set to:
SMWB/SMDWB, /X
• 25, 50 or 100 mW
/E01
• 10, 25 or 50 mW
Compat
StepSiz
Phase
TxPower
TxPower
25 mW
50 mW
100 mW
Setting Scene and Take Number
Use UP and DOWN arrows to advance Scene and Take
and MENU/SEL to toggle. Press the BACK button to
return to menu.
Sc&Take
Scene 1
Ta ke 5
TxPower
Sc&Take
Ta kes
Naming
Recorded File Naming
Choose to name the recorded les by the sequence
number or by the clock time.
Naming
Seq #
Clock
TxPower
Naming
SD Info
Default
SD Info
Information regarding the microSDHC memory card
including space remaining on card.
TxPower
Naming
SD Info
Default
[SMWB ]
Max Rec
E.........................F
0/ 14G
Fuel gauge
Storage used
Storage capacity
Available recording
time (H : M : S)
Restoring Default Settings
This is used to restore the factory settings.
TxPower
Naming
SD Info
Default
Default
settings
No
Ye s

SMWB Series
LECTROSONICS, INC.
14
The wiring diagrams included in this section represent
the basic wiring necessary for the most common types of
microphones and other audio inputs. Some microphones
may require extra jumpers or a slight variation on the
diagrams shown.
It is virtually impossible to keep completely up to date on
changes that other manufacturers make to their prod-
ucts, thus you may encounter a microphone that diers
from these instructions. If this occurs please call our
toll-free number listed under Service and Repair in this
manual or visit our web site at:
www.lectrosonics.com
10k
1k
5
4
3
2
1
To Audio Amplifier
5V SOURCE
MIC
VOLTAGE SELECT
LINE IN
GND
+15uF
+5 VDC
Servo Bias
Pin 4 to Pin 1 = 0 V
Pin 4 Open = 2 V
Pin 4 to Pin 2 = 4 V
+
To Limiter Control
30uF
500 Ohm
100 Ohm
2.7K
200 Ohm
+
3.3uF
5-Pin Input Jack Wiring
Audio input jack wiring:
PIN 1
Shield (ground) for positive biased electret lavaliere mi-
crophones. Shield (ground) for dynamic microphones and
line level inputs.
PIN 2
Bias voltage source for positive biased electret lavaliere
microphones that are not using servo bias circuitry and
voltage source for 4 volt servo bias wiring.
PIN 3
Microphone level input and bias supply.
PIN 4
Bias voltage selector for Pin 3.
Pin 3 voltage depends on Pin 4 connection.
Pin 4 tied to Pin 1: 0 V
Pin 4 Open: 2 V
Pin 4 to Pin 2: 4 V
PIN 5
Line level input for tape decks, mixer outputs, musical
instruments, etc.
Installing the Connector:
1) If necessary, remove the old connector from the
microphone cable.
2) Slide the dust boot onto microphone cable with
the large end facing the connector.
3) If necessary, slide the 1/8-inch black shrink tubing
onto the mircrophone cable. This tubing is needed
for some smaller diameter cables to ensure there
is a snug t in the dust boot.
4) Slide the backshell over the cable as shown
above. Slide the insulator over the cable before
soldering the wires to the pins on the insert.
5) Solder the wires and resistors to the pins on the
insert according to the diagrams shown in Wiring
Hookups for Dierent Sources. A length of .065
OD clear tubing is included if you need to insulate
the resistor leads or shield wire.
6) If necessary, remove the rubber strain relief from
the TA5F backshell by simply pulling it out.
7) Seat the insulator on the insert. Slide the cable
clamp over the and of the insulator and crimp as
shown on the next page.
8) Insert the assembled insert/insulator/clamp into
the latchlock. Make sure the tab and slot align
to allow the insert to fully seat in the latchlock.
Thread the backshell onto the latchlock.
TA5F Latchlock Insert
Insulator Cable clamp
Backshell with
strain relief
Remove strain relief
if using dust boot
Backshell
without strain
relief
Dust boot (35510)
Note: If you use the dust boot, remove the
rubber strain relief that is attached to the TA5F
cap, or the boot will not fit over the assembly.

Digital Hybrid Wireless Belt-Pack Transmitters
Rio Rancho, NM 15
NOTE: This termination is intended for UHF
transmitters only. VHF transmitters with
5-pin jacks require a different termination.
Lectrosonics lavaliere microphones are
terminated for compatibility with VHF and UHF
transmitters, which is different from what is
shown here.
Microphone Cable Termination
for Non-Lectrosonics Microphones
TA5F Connector Assembly
Mic Cord Stripping Instructions
1
23
4
5
VIEW FROM SOLDER
SIDE OF PINS
0.3"
0.15"
Crimping to Shield and Insulation
Shield
Insulation
Strip and position the cable so that the clamp
can be crimped to contact both the mic cable
shield and the insulation. The shield contact
reduces noise with some microphones and the
insulation clamp increases ruggedness.
Crimp these
ngers to
contact the
shield
Crimp these
ngers to
clamp the
insulation

SMWB Series
LECTROSONICS, INC.
16
BALANCED AND FLOATING LINE LEVEL SIGNAL S
*NOTE: If the output is balanced but center
tapped to ground, such as on all Lectrosonics
receivers, do not connect Pin 3 of the XLR jack
to Pin 4 of the TA5F connector.
TA5F
PLUG
XLR JACK
Fig. 7
Compatible Wiring for Both Servo Bias Inputs and Earlier Transmitters:
Simple Wiring - Can ONLY be used with
Servo Bias Inputs:
Servo Bias was introduced in 2005 and all trans-
mitters with 5-pin inputs have been built with this
feature since 2007.
Wiring Hookups for Different Sources
In addition to the microphone and line level wiring hook-
ups illustrated below, Lectrosonics makes a number of
cables and adapters for other situations such as con-
necting musical instruments (guitars, bass guitars, etc.)
to the transmitter. Visit www.lectrosonics.com and
click on Accessories, or download the master catalog.
A lot of information regarding microphone wiring is also
available in the FAQ section of the web site at:
http://www.lectrosonics.com/faqdb
Follow the instructions to search by model number or
other search options.
SHIELD
TIP
PIN
5
4
3
2
1
SLEEVE
LINE LEVEL
RCA or 1/4” PLUG
A UDI O 1
2
3
4 5
T A5 F
PLUG
UNBALANCED LINE LEVEL SIGNAL S
For signal levels up to 3V (+12 dBu) before limiting. Fully
compatible with 5-pin inputs on other Lectrosonics transmitters
such as the LM and UM Series. A 20k ohm resistor can be
inserted in series with Pin 5 for an additional 20 dB of
attenuation to handle up to 30V (+32 dBu).
Fig. 8
1
2
3
4
5
PIN
SHIELD
AUDIO
1
2
3
45
TA5F
PLUG
2.7 k
2 VOLT NEGATIVE BIAS 2-WIRE ELECTRET
Compatible wiring for microphones
such as negative bias TRAM models.
NOTE: The resistor value can range from 2k to 4k ohms.
Fig. 4
Fig. 11
4 VOLT POSITIVE BIAS 3-WIRE ELECTRET
NOTE: This servo bias wiring is not compatible with earlier
versions of Lectrosonics transmitters. Check with the factory
to confirm which models can use this wiring.
2 VOLT POSITIVE BIAS 2-WIRE ELECTRET
Simplified wiring for microphones
such as Countryman B6 Lavalier
and E6 Earset models and others.
NOTE: This servo bias wiring is not compatible with earlier
versions of Lectrosonics transmitters. Check with the factory
to confirm which models can use this wiring.
Fig. 9
Fig. 3 - DPA Microphones
DANISH PRO AUDIO MINIATURE MODELS
This wiring is for DPA lavalier
and headset microphones.
NOTE: The resistor value can range from 3k to 4 k ohms.
Same as DPA adapter DAD3056
Fig. 10
2 VOLT NEGATIVE BIAS 2-WIRE ELECTRET
Simplified wir
ing for microphones such as negative bias TRAM.
NOTE: This servo bias wiring is not compatible with earlier
versions of Lectrosonics transmitters. Check with the factory
to confirm which models can use this wiring.
Fig. 6
LO-Z MICROPHONE LEVEL SIGNALS
For low impedance dynamic mics or electret
mics with internal battery or power supply.
XLR JACK
Insert 1k resistor in series with pin 3 if attenuation is needed
Fig. 1
1
2
3
4
5
PIN
SHIELD
A UDI O 1
2
3
4 5
T A5 F
PLUG
3.3 k
1.5 k
2 VOLT POSITIVE BIAS 2-WIRE ELECTRET
Compatible wiring for microphones such as
Countryman E6 headworn and B6 lavaliere. Also see Fig. 9
4 VOLT POSITIVE BIAS 2-WIRE ELECTRET
Most common type of wiring for
lavaliere mics.
Fig. 2
WIRING FOR LECTROSONICS M152/5P
(N/C)
WHITE
RED
The M152 lavaliere microphone
has an internal resistor and can be
wired in a 2-wire configuration.
This is the factory standard wiring.
Fig. 5 - Sanken COS-11 and others
DRAIN (BIAS)
SOURCE (A UDIO)
SHIELD
4 VOLT POSITIVE BIAS 3-WIRE ELECTRET
WITH EXTERNAL RESIST
OR
Also used for other 3-wire
lavaliere microphones that
require an external resistor.
SHELL
SHELL
SHELL
SHELL
SHELL
SHELL
SHELL
SHELL
SHELL
SHELL

Digital Hybrid Wireless Belt-Pack Transmitters
Rio Rancho, NM 17
Microphone RF Bypassing
When used on a wireless transmitter, the microphone
element is in the proximity of the RF coming from the
transmitter. The nature of electret microphones makes
them sensitive to RF, which can cause problems with
microphone/transmitter compatibility. If the electret mi-
crophone is not designed properly for use with wireless
transmitters, it may be necessary to install a chip capaci-
tor in the mic capsule or connector to block the RF from
entering the electret capsule.
Some mics require RF protection to keep the radio signal
from aecting the capsule, even though the transmitter
input circuitry is already RF bypassed.
If the mic is wired as directed, and you are having dif-
culty with squealing, high noise, or poor frequency
response, RF is likely to be the cause.
The best RF protection is accomplished by installing RF
bypass capacitors at the mic capsule. If this is not pos-
sible, or if you are still having problems, capacitors can
be installed on the mic pins inside the TA5F connector
housing. Refer to the diagram below for the correct loca-
tions of capacitors.
Use 330 pF capacitors. Capacitors are available from
Lectrosonics. Please specify the part number for the
desired lead style.
Leaded capacitors: P/N 15117
Leadless capacitors: P/N SCC330P
All Lectrosonics lavaliere mics are already bypassed and
do not need any additional capacitors installed for proper
operation.
CAPSULE
CAPSULE
SHIELD
AUDIO
SHIELD
AUDIO
BIAS
TA5F
CONNECTOR
TA5F
CONNECT
OR
2-WIRE MIC 3-WIRE MIC
Capacitors next
to mic capsule
Capacitors in
TA5F connector
Line Level Signals
The wiring for line level and instrument signals is:
• Signal Hot to pin 5
• Signal Gnd to pin 1
• Pin 4 jumped to pin 1
This allows signal levels up to 3V RMS to be applied
without limiting.
NOTE for line level inputs only (not instrument):
If more headroom is needed, insert a 20 k
resistor in series with pin 5. Put this resistor
inside the TA5F connector to minimize noise
pickup. The resistor will have little or no effect
on the signal if the input is set for instrument.
See Fig. 8 on
previous page
Line Level
Normal Wiring
Line Level
More Headroom
(20 dB)

SMWB Series
LECTROSONICS, INC.
18
Firmware Update
Firmware updates are made using a microSDHC memory
card. Download and copy the following rmware update
les to a drive on your computer.
• smwb vX_xx.ldr is the rmware update le, where
“X_xx” is the revision number.
In the computer:
1) Perform a Quick Format of the card. On a
Windows-based system, this will automatically
format the card to the FAT32 format, which is the
Windows standard. On a Mac, you may be given
several options. If the card is already formatted in
Windows (FAT32) - it will be greyed out - then you
do not need to do anything. If the card is in another
format, choose Windows (FAT32) and then click
“Erase”. When the quick format on the computer is
complete, close the dialogue box and open the le
browser.
2) Copy the smwb vX_xx.ldr le to the memory card,
then safely eject the card from the computer.
In the SMWB:
1) Leave the SMWB turned o and insert the microS-
DHC memory card into the slot.
2) Hold down both the UP and DOWN arrow buttons
on the recorder and turn the power on.
3) The recorder will boot up into the rmware update
mode with the following options on the LCD:
• Update - Displays a scrollable list of the .ldr les
on the card.
• Power O - Exits the update mode and turns the
power o.
NOTE: If the unit screen shows FORMAT
CARD?, power the unit off and repeat step 2.
You were not properly pressing UP, DOWN and
Power at the same time.
4) Use the arrow buttons to select Update. Use the
UP and DOWN arrow buttons to select the desired
le and press MENU/SEL to install the rmware.
The LCD will display status messages while the
rmware is being updated.
5) When the update is complete, the LCD will display
this message: UPDATE SUCCESSFUL REMOVE
CARD. Open the battery door and remove the
memory card.
6) Re-attach the battery door and power the unit back
on. Verify that the rmware version was updated by
opening the Power Button Menu and navigating to
the About item. See page 6.
7) If you re-insert the update card and turn the power
back on for normal use, the LCD will display a
message prompting you to format the card:
Format Card?
(files lost)
• No
• Yes
If you wish to record audio on the card, you must
re-format it. Select Yes and press MENU/SEL to
format the card. When the process is complete, the
LCD will return to the Main Window and be ready
for normal operation.
If you choose to keep the card as is, you may re-
move the card at this time.
The rmware update process is managed by a bootload-
er program - on very rare occasions, you might need to
update the bootloader.
WARNING: Updating the bootloader can
corrupt your unit if interrupted. Don’t update
the bootloader unless advised to do so by the
factory.
• smwb_boot vX_xx.ldr is the bootloader le
Follow the same process as with a rmware update and
select the smwbboot le.
Recovery Process
In the event of a battery failure while the unit is recording,
a recovery process is available to restore the recording
in proper format. When a new battery is installed and the
unit is turned back on, the recorder will detect the miss-
ing data and prompt you to run the recovery process.
The file must be recovered or the card will not be
usable in the SMWB.
First it will read:
Interrupted Recording
Found
The LCD message will ask:
Recover?
for safe use
see manual
You will have the choice of No or Yes (No is selected as
the default). If you wish to recover the le, use the DOWN
arrow button to select Yes, then press MENU/SEL.
The next window will give you the option to recover all
or part of the le. The default times shown are the best
guess by the processor where the le stopped recording.
The hours will be highlighted and you can either accept
the value shown or select a longer or shorter time. If you
are unsure, simply accept the value shown as the default.
Press MENU/SEL and the minutes are then highlighted.
You can increase or decrease the time to be recovered.
In most cases you can simply accept the values shown
and the le will be recovered. After you have made your
time choices, press MENU/SEL again. A small GO! sym-
bol will appear next to the DOWN arrow button. Pressing
the button will initiate the le recovery. The recovery will
happen quickly and you will see:
Recovery
Successful

Digital Hybrid Wireless Belt-Pack Transmitters
Rio Rancho, NM 19
Special Note:
Files under 4 minutes long may recover with additional
data “tacked on” to the end of the le (from previous
recordings or data if the card had been used previously).
This can be eectively eliminated in post with a simple
delete of the unwanted extra “noise” at the end of the
clip. The minimum recovered length will be one minute.
For example, if the recording is only 20 seconds long,
and you have selected one minute there will be the de-
sired 20 recorded seconds with an additional 40 seconds
of other data and or artifacts in the le. If you are uncer-
tain about the length of the recording you can save a
longer le - there will simply be more “junk” at the end of
the clip. This “junk” may include audio data recorded in
earlier sessions that were discarded. This “extra” infor-
mation can be easily deleted in post production editing
software at a later time.
Declaration of Conformity

SMWB Series
LECTROSONICS, INC.
20
Silver Paste on SM Series
Transmitter Thumbscrews
Silver paste is applied to thumbscrew threads on new
units at the factory to improve the electrical connection
from the battery compartment through the housing on
any SM Series transmitter. This applies to the standard
battery door and the battery eliminator.
Threads
provide
electrical
contact
The small enclosed vial contains a tiny amount (25 mg) of
silver conductive paste. A small speck of this paste will
improve the conductivity between the battery cover plate
thumbscrew and the case of the SM.
The tiny vial is about
1/2 inch tall and
contains 25 mg of
silver paste.
With improved conductivity (lower resistance) more of
the battery voltage can get to the internal power sup-
plies causing reduced current drain and longer battery
life. Though the amount seems very small, it is enough
for years of use. It is, in fact, 25 times the amount that we
use on the thumbscrews at the factory.
To apply the silver paste, rst completely remove the
cover plate from the SM housing by backing the thumb-
screw completely out of the case. Use a clean, soft
cloth to clean the threads of the thumbscrew.
NOTE: Do NOT use alcohol or a liquid cleaner.
Simply hold the cloth around the threads and turn the
thumbscrew. Move to a new spot on the cloth and do it
again. Do this until the cloth remains clean. Now, clean
the threads in the case by using a dry cotton swab (Q-tip)
or equivalent. Again, clean the case threads until a fresh
cotton swab comes away clean.
Open the vial, and transfer a pinhead speck of silver
paste to the second thread from the end of the thumb-
screw. A easy way to pickup a speck of paste is to par-
tially unfold a paper clip and use the end of the wire to
acquire a tiny bit of paste. A toothpick will also work. An
amount that covers the end of the wire is sucient.
Apply paste to second thread
from end of thumbscrew
It is not necessary to spread the paste more than a little
bit on the thread as the paste will spread itself every time
the thumbscrew is screwed in and out of the case during
battery changes.
Do not apply the paste to any other surfaces. The cover
plate itself can be cleaned with a clean cloth by rubbing
the slightly raised rings on the plate where it contacts the
battery terminal. All you want to do is to remove any oils
or dirt on the rings. Do not abrade these surfaces with
a harsh material such as a pencil eraser, emery paper,
etc., as this will remove the conductive nickel plating and
expose the underlying aluminum, which is a poor contact
conductor.