Lectrosonics HH Manual

Lectrosonics Standard Test & Alignment Procedure
Part number(s): HH Hardware version(s): 17424B (audio) & 17423B (radio) Firmware version(s): 0.93
Part number(s): HHAU Hardware version(s): 17424B (audio) & 17423B (radio) Firmware version(s): ?
Part number(s): HH/E01 Hardware version(s): 17424B (audio) & 17423B (radio) Firmware version(s): ?
Part number(s): HH/E02 Hardware version(s): 17424B (audio) & 17423B (radio) Firmware version(s): ?
Common name: hand held transmitter Author(s): Rodney Wildhagen & Cruz Garcia Test procedure version: 01.00
Date: 04 Oct 2011
Initial setup: Audio Board only
Audio board with PIC18F67J11 µC IC
Step Measurement name& description Measurement result (Typ)
Test Segment 10 of 60
Program µC IC and Current draw Audio board only
CAUTION When reprograming already tested devices, be sure to set device programmer GUI to preserve all settings (block,
limiter settings, etc.). In Microchip MPLAB this is done by selecting Programmer > Settings > Program > Preserve
EEPROM on program > Apply > OK. Failure to do so will result in loss of all assigned variable values such as
frequency block, limiter setting, indicator settings, etc.
Note This need only be performed at the factory the first time the DUT is powered up, when µC IC is replaced, or when a
firmware update is desired and confirmed to be appropriate.
Apply +3.0VDC, 300mA current limit in at battery contact J8 (J9 is circuit common)
Note In order to program DUT, JU1 must be jumpered or the power button must be pressed during the entire programming process. Remove JU1 jumper after programming.
Program µC IC with programming cable connected at J6 (ICSP port)
Remove ICSP cable
Measure current draw 50 to 500 mA (117)
Note The goal here is only to ensure the audio board powers up and is not burning up with fever

Remove DC voltage from Battery contacts and apply firmware version label to audio board
Test Segment 20 of 60
NOTE: This segment may be performed using one audio board to test multiple radio boards
Initial setup:
Known good, pre-tested audio board with PIC18F67J11
µC IC running firmware version appropriate & current for
part number connected to an untested radio board
Test panel key pad or appropriate test rig connected to
audio board J2
Apply +3.0VDC, 300mA current limit in at battery contact
J8 (J9 is circuit common).
All voltage measurements referenced to circuit common
All demodulated carrier and carrier deviation
measurements taken with a Hewlett Packard 8901B
modulation analyzer with no 8901B filters selected. Use of
other instruments may yield different results particularly
measurements pertaining to noise and phase and
measurements where noise is a significant factor
All audio stimulus signals applied to audio input rig
defined at foot of this document
All audio stimulus signals are single ended.
Carrier power for various part numbers are as follows:
HH=100mW, HHAU & HH/E01=50mW and HH/E02
All audio measurements taken with a ≤10 Hz HPF and
80KHz LPF (use filter on audio signal analyzer, no
modulation analyzer unless otherwise specified).
This font indicates use of the
A
lternate Method to manual testing. The
Alternate Method uses the LectroLink
apparatus and either the LecNet2
Command Terminal Utility or the
O:\ATE\MTE\HH\
H
H_LectroLink_Control.exe
program. Test steps bearing the same
number indicates alternate method(s).
Step Measurement name & description Measurement result (Typ)
Power Up sequence and current draw
Prerequisite(s): FPGA IC programmed
Hold test power button on test panel key pad for 3 seconds until DUT powers up
Observe behavior of test key pad LED -10 LED turns on red, then -20 LED
turns on red then both off.
both LED's flash red once then

green once
Observe behavior of test audio board LCD "HH"
"Vx.xx"
"block XX"
"Hybrid"
?
?
?
?
frequency "Main" screen
Note a flashing antenna icon inside a ׎indicates the PLL is not locked
Measure current draw 50 to 500 mA (145)
Note The goal here is only to ensure the DUT powers up and is not burning up with fever
Audio board frequency block assignment
Prerequisite(s): FPGA IC programmed
Note: This part has to be performed only on the first DUT to setup Test Audio Board for the Block.
Momentarily connect audio board TP5 to TP22 (enter Set-up mode)
Note Entering Set-up mode is not necessary if the Alternate Method is exercised.
Using the test key pad navigate to the "Block" screen.
Press UP or DWN button on the test panel key pad to change unit to desired Block
block= (set freq block 470,19-33, 944 standard 400-999 extended)
Turn DUT Off then back On and check to see if the Block set.
VCO adjustment & VCO start-up test
Prerequisite(s): FPGA IC programmed
Using the test key pad navigate to the "Freq." screen
Press MENU/SEL and UP button simultaneously to change frequency to highest frequency. (pressing MUNU/SEL

and UP simultaneously will step the frequency up in increments of 16 only pressing the UP or DOWN buttons will
only increment by 1)
channel=XX set channel (0(00) to 1020 (ff) in normal tuning mode, 80 is 512)
Adjust radio board C1 for 2.5 VDC at radio board TP1 (VCO_CONT) +2.45 to +2.55 VDC (+2.5)
No DC power in at battery contacts
Wait until transmitter completely powers down (approx. 4 sec)
Apply +3.0VDC, 500mA current limit in at battery contact J8 (J9 is circuit common)
Hold Power button for 3 seconds (make sure unit come on).
Measure carrier signal power to be sure the VCO starts on power up at selected
carrier frequency ≥+10 dBm
Using the test key pad navigate to the "Freq." screen
Press MENU/SEL and UP button simultaneously to change frequency to lowest frequency. (pressing MUNU/SEL
and UP simultaneously will step the frequency up in increments of 16 only pressing the UP or DOWN buttons will
only increment by 1)
channel=XX set channel (0(00) to 1020 (ff) in normal tuning mode, 80 is 512)
Measure DC voltage at radio board TP1 (VCO_CONT) +0.6 to +1.2 VDC
No DC power in at battery contacts
Wait until transmitter completely powers down (approx. 4 sec)
Apply +3.0VDC, 500mA current limit in at battery contact J8 (J9 is circuit common)
Hold Power button for 3 seconds (make sure unit come on).
Measure carrier signal power to be sure the VCO starts on power up at selected
carrier frequency ≥+10 dBm
Carrier signal power adjustments & spectral purity measurements
Prerequisite(s): FPGA IC programmed
Momentarily connect audio board TP22 to J5 pin 4 (enter Set-up mode)
Note Entering Set-up mode is not necessary if the Alternate Method is exercised.

Note Power Measurement are made with the output of the DUT connected directly to the power measuring device to ensure measurement is as accurate as posable .
Using the test key pad navigate to the "PwrCal" screen
Note
This sets the DUT to "L" (50mW) carrier power at the Mid carrier frequency, from here pressing the UP or DWN
buttons adjusts carrier power. Pressing MENU/SEL button once will move to the Low carrier freq. UP and DWN
buttons adjusts carrier power. Press MENU/SEL again moves to the highest frequency, UP and DWN buttons
adjusts carrier power. Pressing MENU/SEL once more moves to "H" (100mW) at the Mid freq and the pattern
continues to set power for 100mW..
Measure current draw
Repeat this process until all 6 carrier signal power points have been adjusted and double checked after the last
adjustment has been made
Current draw tolerances
for test procedure segment
#20
50mW 100mW
160 to 196
mA (178)
191 to 233
mA (212)
Carrier signal power tolerances for test
procedure segment #20
50mW 100mW
HH +15 to +19dBm +18 to
+22dBm
HHAU 16 to 17.5dBm
HH/E01 +14.8 to -
18.8dBm
HHB/E02 9.5 to 11.1dBm
powercal(p,s)=
set transmitter power calibration parameter, "p" selects
the power level must be 50 or 100, "s" specifies the
carrier frequency within the block and must be 0 for
block bottom, 1 for block middle, or 2 for block top
Note
Carrier power may alternatively be adjusted by first querying the powercal
value "powercal(50,0)?" and subsequently incrementing or decrementing carrier
power using "p=+2" syntax.
Test Segment 30 of 60

NOTE: This segment may be performed using one known good pre-tested audio board to test multiple radio boards
Spectral purity measurements and RF Mute function
Prerequisite(s): FPGA IC programmed
Connect RF Board J3(J4 common) DUT output to a splitter that feeds to the SpecAn, Frequency Counter high
frequency input and the ModAn.
Momentarily connect audio board TP22 to J5 pin 4 (enter Set-up mode)
Note Entering Set-up mode is not necessary if the Alternate Method is exercised.
Apply +3.0VDC, 500mA current limit in at battery contact J8 (J9 is circuit common)
Using the test key pad navigate to the "PwrCal" screen
Step thru all 6 PwrCal measurement while checking for spurs using both prescribed setting in the next steps. This
will result in 12 different spur measurements.
Measure spurs 5 to 1495MHz RBW=30kHz, VBW=10kHz ≤-65 dBc
Note Neither the 2nd nor the 3rd harmonic should be considered as a spur
Measure spurs carrier freq +/- 20MHz RBW=30kHz, VBW=10kHz ≤-65 dBc
Using the test key pad navigate to the "Standby" menu and press the MENU/SEL to activate RF Mute
Measure RF carrier output at radio board J3 ≤-60 dBc
Press MENU/SEL button again to get to the "Xmit" menu, Pressing MENU/SEL again take unit out of "Standby"
Measure carrier signal power to at radio board J3 ≥+5 dBm
Using the test key pad navigate back to the frequency "Main" screen
Modulation level and distortion adjust
Prerequisite(s): FPGA IC programmed
DUT at middle carrier frequency
channel=XX set channel (0(00) to 1020 (ff) in normal tuning mode, 80 is 512)
NOTE BL944 specimens are permitted to exhibit 150% of otherwise allowable distortion. Some products have required this
additional margin, others have not. At the time of this writing it is unknown how this product will shake out.

Momentarily connect audio board TP22 to J5 pin 4 (enter Set-up mode)
Note Entering Set-up mode is not necessary if the Alternate Method is exercised.
pilotbp=1
Using the test key pad navigate to the "DevOff" screen (Mid carrier freq is highlighted)
tone=1 (sets DSP 1kHz test tone mode ON)
Adjust radio board R26 for minimum modulation distortion at demodulated
carrier
≤1.0 % THD+N (0.7)
Adjust radio board R47 for 100kHz peak deviation at radio board J3 99 to 101 kHz (100)
Press MENU/SEL button on the test panel key pad (Lowest carrier freq is highlighted)
channel=XX set channel (0(00) to 1020 (ff) in normal tuning mode, 80 is 512)
Measure distortion at demodulated carrier, fine adjusting radio board R26 if
required ≤1.2 % THD+N (0.7)
Press UP or DWN button on the test panel key pad for 100 kHz peak carrier
deviation at radio board J3 99 to 101 kHz (100)
devoff(0)? (Get deviation offset setting for the Low
channel) (+10 to -10). devoff(0)=x (set deviation
offset for 100KHz)(1KHz steps).
99 to 101 kHz (100)
Press MENU/SEL button on the test panel key pad (Highest carrier freq is highlighted)
channel=XX set channel (0(00) to 1020 (ff) in normal tuning mode, 80 is 512)
Measure distortion at demodulated carrier, fine adjusting radio board R26 if
required
≤1.2 % THD+N (0.7)
Press UP or DWN button on the test panel key pad for 100 kHz peak carrier
deviation at radio board J3
99 to 101 kHz (100)
devoff(1)? (Get deviation offset setting for the high
channel) (+10 to -10). devoff(1)=x (set deviation
offset for 100KHz)(1KHz steps).
99 to 101 kHz (100)
Repeat this step until no further adjustment is necessary

Press BACK button on the test panel key pad to get back to the frequency "Main" screen
tone=0 (turns off DSP 1kHz test tone)
Test Segment 40 of 60
Install VCO shield cover
No DC power in at battery contacts
Disconnect radio board from audio board
Install VCO shield assembly Part number ?
Bend tabs at 45 degrees and Solder around the VCO shield
Allow to cool for a minimum of 10 minutes
Test Segment 50 of 60
NOTE: This segment must be performed using the audio/radio board pairs that will remain paired up
Setup:
Audio board with PIC18LF6J11 µC IC running firmware
version appropriate & current for part number connected
to an untested radio board, these boards will live together
til death do they part.
Test panel key pad connected to audio board J3
Apply +3.0VDC, 500mA current limit in at battery contact
J8 (J9 is circuit common)
All voltage measurements referenced to circuit common
All demodulated carrier and carrier deviation
measurements taken with a Hewlett Packard 8901B
modulation analyzer with no 8901B filters selected. Use o
f
other instruments may yield different results particularly
measurements pertaining to noise and phase and
measurements where noise is a significant factor
All audio stimulus signals applied to audio input rig
All audio stimulus signals are single ended.
Carrier power for the various part numbers are as follows:
HM=100mW, HMAU & HM/E01=50mW and HM/E02
All audio measurements taken with a ≤10Hz HPF and
80KHz LPF (use filter on audio signal analyzer, not
modulation analyzer unless otherwise specified).
This font indicates use of the
A
lternate Method to manual testing. The
alternate Method uses the LectroLink
apparatus and either the LecNet2
Command Terminal Utility or the
O:\ATE\MTE\HM\
H
M_LectroLink_Control.exe
program. Test steps bearing the same
number indicate alternate method(s).
Connect Power Meter Head to RF Board J3(MT4 is circuit

defined at foot of this document, see below common).
Power Up sequence and current draw
Prerequisite(s): FPGA IC programmed
Hold power button on test panel key pad for 3 seconds.
Observe behavior of test key pad LED -10 LED turns on red, then -20 LED turns on red then both off.
both LED's flash red once then
green once
Observe behavior of test key pad LCD "000000"
"HH"
"Vx.xx"
"Hybrid"
?
?
?
?
frequency "Main" screen
a flashing antenna icon inside a ׎indicates the PLL is not locked
Measure current draw 50 to 500 mA (170)
Note The goal here is only to ensure the audio board powers up and is not burning up with fever
20.20 Control Panel switch test
Prerequisite(s): FPGA IC programmed
Apply +3.0VDC, 500mA current limit in at battery contact J8 (J9 is circuit common)
LCD display and push button key pad installed
Observe LCD display and
verify the frequency "Main"

screen is displayed
buttons?
realtime button status bitmap
(menu/sel=128, back=64, up=1,
down=2, "4=4", "3=8", "2=16",
"1=32", no button=0)
ok 0 (no
tolerance) (0)
Press and release control
board Menu/Sel button
Observe change in menu on
LCD to the Menu screen
press and hold
Menu/Sel
buttons?
realtime button status bitmap
(menu/sel=128, back=64, up=1,
down=2, "4=4", "3=8", "2=16",
"1=32", no button=0
ok 1 (no
tolerance) (1)
Release Menu/Sel
button
Press and hold control board
Down button
Observe change in highlighted
menu on LCD
buttons?
realtime button status bitmap
(menu/sel=128, back=64, up=1,
down=2, "4=4", "3=8", "2=16",
"1=32", no button=0)
ok 16 (no
tolerance) (16)
Release Down button
Press and hold control board
Up button
Observe change in highlighted
menu on LCD
buttons?
realtime button status bitmap
(menu/sel=128, back=64, up=1,
down=2, "4=4", "3=8", "2=16",
ok 32 (no
tolerance) (32)

"1=32", no button=0)
Release Up button
Press and hold control board
Back button
Observe change in Menu on
LCD return back to freq "main
screen"
buttons?
realtime button status bitmap
(menu/sel=128, back=64, up=1,
down=2, "4=4", "3=8", "2=16",
"1=32", no button=0)
ok 2 (no
tolerance) (2)
Release Back button
Press and hold control board
Mute ׎button
Observe change in Menu on
LCD the Mute ׎Icon appears
buttons?
realtime button status bitmap
(menu=1, back=2, mode=4,
power=8, down=16, up=32,
mute=64)
ok 4 (no
tolerance) (4)
Release Mute button
Press and release Mute ׎until
any icons are gone.
Press and hold Audio board
Mute button
Observe change in Menu on
LCD the<–Mute–> Icon
appears and flashes
buttons?
realtime button status bitmap
(menu=1, back=2, mode=4,
power=8, down=16, up=32,
ok 64 (no
tolerance) (64)

mute=64)
Release Mute button
Press and hold control board
Power button
buttons?
realtime button status bitmap
(menu/sel=128, back=64, up=1,
down=2, "4=4", "3=8", "2=16",
"1=32", no button=0)
ok 0 (no
tolerance) (8)
Release Power button
DC voltage measurements
Apply +3.0VDC, 500mA current limit in at battery contact J8 (J9 is circuit common)
Hold Power button for 3 seconds (make sure unit come on).
Measure DC voltage at audio
board: TP16 +1.7 to +1.9VDC (+1.8)
TP9 +3.1 to +3.5VDC (+3.3)
D3/C37 junction -3 to -3.6VDC (-3.3)
U16-pin5 +4.9 to +5.1VDC (+5.0)
C40/D4 junction +6.9 to +7.1VDC (+7.0)
TP-3 +4.1 to +4.9VDC (+4.0)
TP1 (backlight) +2.5 to +2.7VDC +2.6
TP6 +1.39 to +1.59VDC (+1.49)
TP15 TP6 value +/- 50mVDC (+10mVDC)
Phantom power voltage measurements
Note:
Current measurements are made with audio input rig (described at the foot of this document) attached to the audio
input of the audio board with NO audio stimulus. Audio stimulus will light the audio LED's causing more current
pull and the audio input rig can add as much as 10 mA. Connect input rig to DUT.
Measure voltage at Audio +2.0 to +3.0VDC (+2.5V)

input Rig test point
Audio board frequency block assignment
Momentarily connect audio board TP5 to TP22 (enter Set-up mode)
Note Entering Set-up mode is not necessary if the Alternate Method is exercised.
Using the test key pad navigate to the "Block" screen.
Press UP or DWN button on the test panel key pad to change unit to desired Block
block= (set freq block 470,19-33, 944 standard 400-999 extended)
Turn DUT Off then back On and check to see if the Block set.
VCO adjustment & VCO start-up test
Using the test key pad navigate to the "Freq." screen
Press MENU/SEL and UP button simultaneously to change frequency to highest frequency. (pressing MUNU/SEL
and UP simultaneously will step the frequency up in increments of 16 only pressing the UP or DOWN buttons will
only increment by 1)
channel=XX set channel (0(00) to 1020 (ff) in normal tuning mode, 80 is 512)
Adjust radio board C1 for +2.5 VDC at radio board TP1 +2.0 to +2.6 VDC (+2.5)
No DC power in at battery contacts
Wait until transmitter completely powers down (approx. 4 sec)
Apply +3.0VDC, 500mA current limit in at battery contact J8 (J9 is circuit common)
Hold Power button for 3 seconds (make sure unit come on).
Measure carrier signal power to be sure the VCO starts on power up at selected
carrier frequency ≥+10 dBm
Using the test key pad navigate to the "Freq." screen
Press MENU/SEL and UP button simultaneously to change frequency to lowest frequency. (pressing MUNU/SEL
and UP simultaneously will step the frequency up in increments of 16 only pressing the UP or DOWN buttons will
only increment by 1)
channel=XX set channel (0(00) to 1020 (ff) in normal tuning mode, 80 is 512)

Measure DC voltage at radio board TP1 +0.6 to +2 VDC (+1.3)
No DC power in at battery contacts
Wait until transmitter completely powers down (approx. 4 sec)
Apply +3.0VDC, 500mA current limit in at battery contact J8 (J9 is circuit common)
Hold Power button for 3 seconds (make sure unit come on).
Measure carrier signal power to be sure the VCO starts on power up at selected
carrier frequency ≥+10 dBm
Carrier signal power adjustments & spectral purity measurements
Momentarily connect audio board TP22 to J5 pin 4 (enter Set-up mode)
Note Entering Set-up mode is not necessary if the Alternate Method is exercised.
Note Power Measurement are made with the output of the DUT connected directly to the power measuring device to ensure an accurate as possible measurement.
Using the test key pad navigate to the "PwrCal" screen
Note
This sets the DUT to 50mW carrier power at the Mid carrier frequency, from here pressing the UP or DWN buttons
adjusts carrier power. Pressing MENU/SEL button once will move to the lowest carrier freq. UP and DWN buttons
adjusts carrier power. Press MENU/SEL again moves to the highest frequency, UP and DWN buttons adjusts carrier
power. Pressing MENU/SEL once more moves to 100mW at the Mid carrier frequency and the pattern continues.
Measure current draw
Repeat this process until all 6 carrier signal power points have been adjusted and double checked after the last
adjustment has been made
Current draw tolerances
for test procedure segment
#20
50mW 100mW
17423
≤B
333 to
407 mA
(370)
414 to
506 mA
(460)
Carrier signal power tolerances for test
procedure segment #20
50mW 100mW
HH +16.3 to
+17.7dBm
+19.3 to
+20.7dBm
HHAU +16.3 to
+17.7dBm
HH/E01 +14.8 to -

18.8dBm
HH/E02 9.7 to 11.1dBm
powercal(p,s)=
set transmitter power calibration parameter, "p" selects
the power level must be 50 or 100, "s" specifies the
p
osition within the block and must be 0 for block bottom,
1 for block middle, or 2 for block top
Note
Carrier power may alternatively be adjusted by first querying the powercal
value "powercal(50,0)?" and subsequently incrementing or decrementing carrier
power using "p=+2" syntax.
Test Segment 60 of 60
Spectral purity measurements and RF Mute function
Prerequisite(s): FPGA IC programmed
Connect BNC cable with a 2 Prong Adaptor from RF Board J3(J4 common) to a splitter that feeds to the SpecAn,
Frequency Counter high frequency input and the ModAn.
Step thru all 6 PwrCal measurement while checking for spurs using both prescribed setting in the next steps. This
will result in 12 different spur measurements.
Measure spurs 5 to 1495MHz RBW=30kHz, VBW=10kHz ≤-65 dBc
Note Neither the 2nd nor the 3rd harmonic should be considered as a spur
Measure spurs carrier freq +/- 20MHz RBW=30kHz, VBW=10kHz ≤-65 dBc
Using the test key pad navigate to the "Standby" menu and press the SENU/SEL to active RF Mute
Measure RF carrier output at radio board J3 ≤-60 dBc
Press MENU/SEL button again to get to the "Xmit" menu, Pressing MENU/SEL again take unit out of "Standby"
Measure carrier signal power to at radio board J3 ≥+5 dBm
Using the test key pad navigate back to the frequency "Main" screen
Modulation level and deviation adjustment
Prerequisite DUT at mid channel for the Block.
channel=XX set channel (0(00) to 1020 (ff) in normal

tuning mode, 80 is 512)
Note: BL944 specimens are permitted to exhibit 150% of otherwise allowable distortion. Some products have required this additional margin. others have not. At the time of this writing, it is unknown how this product will shake out.
Momentarily connect Audio Board TP5 to TP22 (enter Set-up mode).
Entering Setup Mode is not necessary if the Alternate Method is used.
pilotbp=1
Using the test key pad navigate to the "DevOff" screen (Mid carrier frequency is highlighted)
tone=1 (sets DSP 1KHz test tone mode on)
Adjust RF Board R26 for minimum distortion at demodulated carrier at RF
Board J3. ≤1.0% THD+N (0.7)
Adjust RF Board R47 for 100KHz peak deviation at RF Board J3. 99 to 101KHz (100)
Press MENU/SEL button on the test panel key pad (lowest carrier frequency is highlighted)
channel=XX set channel (0(00) to 1020 (ff) in normal tuning mode, 80 is 512)
Measure distortion at demodulated carrier at RF Board J3. ≤1.2% THD+N (0.7)
Press Up or Down button on test key pad for 100KHz peak deviation at RF
Board J3. 99 to 101KHz (100)
devoff(0)? (Get deviation offset setting for the Low
channel) (+10 to -10). devoff(0)=x (set deviation
offset for 100KHz)(1KHz steps).
99 to 101KHz (100)
Press MENU/SEL button on the test panel key pad (Highest carrier frequency is highlighted)
channel=XX set channel (0(00) to 1020 (ff) in normal tuning mode, 80 is 512)
Measure distortion at demodulated carrier at RF Board J3 ≤1.2% THD+N (0.7)
Press Up or Down button on test key pad for 100KHz peak deviation at RF
Board J3. 99 to 101KHz (100)
devoff(1)? (Get deviation offset setting for the High
channel) (+10 to -10). devoff(1)=x (set deviation
offset for 100KHz)(1KHz steps).
99 to 101KHz (100)

Repeat this Section until no further adjustment is necessary.
Press BACK button on the test key pad to get back to the main (frequency) screen.
tone=0 (turns Off test tone)
Low pass filter set / and Frequency adjust
Prerequisite(s) Unit in set-up mode
Unit at middle carrier frequency
Note Entering Set-up mode is not necessary if the Alternate Method is exercised.
Using the test panel key pad navigate to the "Rolloff" screen LCD reads "Rolloff 35Hz" If LCD reads anything other
than "Rolloff 35Hz" press the DWN button on the test panel key pad to change it to "Rolloff 35Hz".
rolloff=0 (set LF roll-off to 35 Hz)
Using the test panel key pad navigate to the "Fine" screen (menu function that allows offset of carrier frequency)
Press UP or DWN button on the test panel key pad to fine adjust middle carrier
frequency
+/- 2kHz
finetune? (gets setting) finetune=xx (set fine frequency correction -16 to
+15, 3.125 kHz steps)
Pilot signal deviation & frequency measurements
Prerequisite(s) no audio in at audio input rig
Gain set to "0"
level=0 (changes audio level to 0)
Using the test panel key pad navigate to the "freq." screen
Press MENU/SEL and UP button simultaneously to change frequency to the lowest carrier frequency. (pressing
MUNU/SEL and UP simultaneously will step the frequency up in increments of 16 only pressing the UP or DOWN
buttons will only increment by 1) .
channel=XX set channel (0(00) to 1020 (ff) in normal tuning mode, 80 is 512)
Measure peak carrier deviation at radio board J3 4.5 to 6.5 KHz (5.5)
2.8 to 3.4KHz (3.1)

2.8 to 3.4 KHz (3.1)
1.5 to 1.9 KHz (1.9)
Note Pilot Tone signal frequency at demodulated carrier at radio board J3 31.999 to 32.001 KHz (32)
Noise measurements (low gain branch)
Prerequisite(s) Unit in set-up mode
Gain set to "0"
Note Entering Set-up mode is not necessary if the Alternate Method is exercised.
Using the test panel key pad navigate to the "Compat" screen
Press UP button on the test panel key pad until LCD reads "Passthru"
compat=0 (changes compat mode to passthru)
Using the test panel key pad navigate to the "Freq." screen
Press MENU/SEL and UP button simultaneously to change frequency to highest frequency. (pressing MUNU/SEL
and UP simultaneously will step the frequency up in increments of 16 only pressing the UP or DOWN buttons will
only increment by 1)
channel=XX set channel (0(00) to 1020 (ff) in normal tuning mode, 80 is 512)
Using the test panel key pad navigate to the "Gainsw" screen select low gain
gainsw=2
Measure Noise (noise signal amplitude) at radio board J3 ≤-55 dBu (-58)
Noise & microphonics measurements (high gain branch)
Prerequisite(s) Unit in set-up mode
Note Entering Set-up mode is not necessary if the Alternate Method is exercised.
DUT in "Passthru"
No audio signal in at audio input rig
FREQ set to highest frequency
Gain set to "0"
Using the test panel key pad navigate to the "Gainsw" screen select high gain

gainsw=1
Measure Noise (noise signal amplitude) at radio board J3 ≤-55dBu (-58)
Tap edge of radio board repeatedly at corner opposite from power connections
with ceramic screwdriver handle and measure noise at demodulated carrier at
radio board J3 referenced to step #40.100.10 value
0 to 18dB(r) (+5)
Using the test panel key pad navigate to the Gain screen and change audio gain to "Gain 45"
level=45 (changes audio level to 45)
Measure Noise at radio board J3 ≤-53dBu (-57)
Using the test panel key pad navigate to the "Gainsw" screen select "auto"
gainsw=0
Mic gain pot taper test
Prerequisite(s) Unit in set-up mode
Note Entering Set-up mode is not necessary if the Alternate Method is exercised.
DUT in "Passthru"
FREQ set to highest frequency
Audio Gain set to "Gain 45"
Gainsw set to "auto"
-55 dBu, 250Hz, low distortion, sinusoidal signal in at audio input rig
Note Neither audio board LED (D5 nor D6) are red (limiter not activated)
Note It is vital that the demodulation device (typically an FM modulation meter/analyzer) not be permitted to auto range while performing the remainder of test step #40.110
Measure audio signal level at demodulated carrier at radio board J3 0dB reference (0)
Note #40.110.20.10 carrier signal deviation varies a bit with different batches of digital pot IC's at the maximum gain setting
Change audio Gain setting to "Gain 22"
level=22 (changes audio level to 22)
Measure audio signal level at demodulated carrier at radio board J3 -24 to -22dB(r) (-23)
Change audio Gain setting to "Gain 22"

level=0 (changes audio level to 0)
Measure audio signal level at demodulated carrier at radio board J3 -43.5 to -41.5dB(r) (-42.5)
Mute unit by pressing S1
mute=2 mute audio 1=unmuted 2=muted
Measure audio signal level at demodulated carrier at radio board J3 ≤-45dB(r) (-47)
Un-mute unit by pressing S1
Measure audio signal level at demodulated carrier at radio board J3 -43.5 to -41.5dB(r) (-42.5)
Modulation distortion measurement
Prerequisite(s) Unit in set-up mode
DUT in "Passthru"
FREQ set to highest frequency
Audio Gain set to "Gain 0"
Gainsw set to "auto"
Note Entering Set-up mode is not necessary if the Alternate Method is exercised.
-10 dBu, 250Hz, low distortion, sinusoidal signal in at audio input rig
Verify neither audio board LED (D5 nor D6) are red (limiter not activated)
Measure audio signal
distortion of the demodulated
carrier radio board RF J3 at
carrier frequency:
Highest freq ≤0.55% THD+N (0.35)
FREQ set to lowest frequency
measure audio signal
distortion.
Lowest freq ≤0.55% THD+N (0.35)
channel=xx, set channel (0(00) to 1020 (ff) in normal tuning mode, 80 is 512 ≤0.55% THD+N (0.35)
FREQ set to mid frequency
measure audio signal
distortion.
Middle freq ≤0.55% THD+N (0.35)