Stryker SR-955 HPC alignment – Radios Guide

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Note before testing

Testing Voltage 13.8V

Pay attention to have correct setup for testing machine.

Do not change inside or parameter at will.

Before assembling the cover, delete the factory mode by the factory software.

Do remember to reset the radio to factory default after assembling the radio.


stryker-sr-955-hpc-alignmentFrequency points for testing

Band A

Channel 1:RX(24.025)  、TX(24.105)、NB/ANL open

Channel 2:RX(27.065) 、TX(27.100) 、NB/ANL open

Channel 3:RX(30.105)  、TX(30.095)  、NB/ANL open


VCO testing 


New radio reset

All new radio will auto reset after power on, but required to manual reset again: Hold FUNC+SCAC+ COLOR key and power on the radio,LCD show “REST ALL” then show ”REST END” , the full reset is done.

Note:Hold FUNC to power is half reset, the LCD show RESET.

Check Quiescent Current: Turn off SQ,In AM/FM/USB/LSB, all < 400mA(LCD color is RGB.

Check Display: Hold SCAN to power on,to check 2 LCD.

Check Backlight LED

A-  Power on and repeat press COLOR key,the LED show  :RED、GREEN、BLUE    3 colors,make sure the LED work  fine before install LCD board.

B- Switch to DIM position,The big LCD show DIM :31,adjust channel knob until big LCD show DIM:OFF,check the changes of darkles, the smaller data get the darker backlight.

Check voltageIn function menu, the “LCD:xxx” Set to     N&DC,the big LCD show voltage. The voltage shall be  ± 0.10Vcomapred with the supplied voltage, adjust the R521 560K resistance if not match.

Check keys and buttonsCheck the function, look and touch of full panel, key, switch, Knobs.

Check programmingProgram the radio with Frequency point listed on the top of this instruction, cancel the factory mode by the factory software.

VCO voltage Testing   TP510 and TP509,

TP510:between 1.0-4.0 in all frequency band,no Fluctuation,if does not match, adjust C801 8P capacitance,Capacitance toleration is  ±2P,check other problem if it not matches.

TP509:between 0.8-5.5 in all frequency band,no Fluctuation,if does not match, adjust C555 4P5 capacitance,Capacitance toleration is  ±2P,check other problem if it not matches.

Note:2 VCO is connected, when TP510 testing unlock,TP509 also unlock,only when TP510 locked,TP509 can be  locked.



Frequency adjustment

Enter testing modeHold COLOR to power on,adjust FREQ for the rough adjust,CLAR external spindle for fine adjust,FUNC, COLOR key are used to switch between testing items.

VCO frequency adjustmentTesting point TP513,FM mode,CLAR inner spindle in middle position(an Obviously fixed-point can be found in middle point),before adjustment, power on radio in USB mode for 2-5 minutes.

Choose FRQ 320:Adjust  L807,frequency 38.695MHZ±10HZ,background    noise < 40HZ

Choose F05 XXX:Adjust frequency 38.695MHZ±10HZ,background noise < 40HZ

Turn clockwise and anti-clockwise to the end and  test the fluctuation need 500±100Hz, switch the knob to a middle position after testing.

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Choose F15 XXX:Frequency need 38.695MHZ±10HZ,background noise < 40HZ

Turn clockwise and anti-clockwise to the end and test. the fluctuation need 1500±200Hz, switch the knob to the middle position after testing.

Choose F25 XXX:Frequency need 38.695MHZ±10HZ,background noise < 40HZ.

Turn clockwise and anti-clockwise to the end and test. the fluctuation need 2500±300Hz, switch the knob to a middle position after testing.

Note:FRQ 320 data can not adjusted,if the frequency fluctuation is <100HZ,you can adjust   ±70>

After testing FO5、F15、F25 frequency fluctuation,be sure to turn the CLAR inner spindle in middle position.

BFO frequency adjustment:Enter testing mode,choose BFXX display,testing point TP301

Choose FM mode,frequency need 10.695MHZ±10HZ,background noise < 40HZ

Choose USB mode,frequency need 10.6975MHZ±10HZ,background noise < 40HZ

Choose LSB mode,frequency need 10.6925MHZ±10HZ,background noise < 40HZ

AFF frequency adjustmentEnter testing mode,choose AFFXXX display,testing point TP514

Choose FM mode,frequency need 10.240MHZ±40HZ,background noise < 40HZ

Note1:During alignment,choose the minimum deviated frequency, do well adjust and warm up the testing machine.

If the deviation does not meet the standard, revise the C582    5P capacitance,Capacitance between 1-6P,if still not OK,check another index.

Note2:The final frequency is composed of BFO and VCO frequency when the testing transmitting frequency is an error, it is necessary to recheck both frequencies. Due to the high requirement on accuracy, do adjust this 2 frequency after the temperature turn normal if any soldering work near the 10.24MHZ, and 10.6975 MHz component. Y800, Y501, Y500 must ground, the housing of L807 and Y800 shall be touched. After finish above alignment, be sure to install the shield over the 2 VCO to ensure rest alignment.


                                                                              TX testing


Note:Voltage 13.8V,testing machine with filter<20HZ    HPF and 15KHZ    LPF,DE-EMPHASIS is OFF。Clockwise turning is for increase power, anti-clockwise turning is for reducing low. The power switch only works for AM,FM mode. If the power is too big, connect an Attenuator with testing machine.


TX Voltage:When the FM power is over 50W(current around 9A),The voltage is 13V

Switch location: All the 5 Rocker Switch fix in middle position,CLAR inner spindle fix in middle point ,MIC GAIN to maximum

Power supply voltage: In USB mode,switch the power to maximum, adjust W13 until voltage in T9 is 12V±0.1V

Quiescent current:In USB mode ,switch the power to maximum,MIC Short-circuited.

A- J3 with Short-circuit jumper(J4 without),hold PTT, adjust W8 until the current is minimum, adjust W8 anti-direction until the current is 100MA over the minimum value.

B- J4 with Short-circuit jumper(J3 without),hold PTT, adjust W9 until the current is minimum, adjust W9 anti-direction until the current is 100MA over the minimum value.

C- J3, J4 all without Short-circuit jumper,hold PTT, adjust W7 until the current is minimum, adjust W7 anti-direction until the current is 100MA over the minimum value.

D- Testing the transistor follow above order.

E- 4 transistors must be installed under same voltage

Coil adjustmentBefore adjust power,L20、L16 move to the corresponding position as the sample,install J3、J4 jumper

Transmit intermediate-frequency transformer adjustmentChoose channel3, FM mode,output power to maximum,adjust T13、T14,to get maximum output power

Note:After finish above alignment, be sure to install the shield over the T13、T14 to ensure rest alignment.


FM mode testing

Coil adjustmentBefore adjust power,L20、L16 move to the corresponding position as the sample,install J3、J4 jumper

Transmit intermediate-frequency transformer adjustmentChoose channel 3, FM mode,output power to maximum,adjust T13、T14,to get maximum output power, Note:After finish above alignment, be sure to install the shield over the T13、T14 to ensure rest alignment.

FM High powerChoose channel 2,adjust output power to maximum, adjust W14 to get power 50W±2W, the power on channel 1 and channel 3 shall > 40w, current < 10A, frequency 50HZ

FM low powerChoose channel 1、2、3,adjust output power to minimum,the power shall between 0.5-3W,current <2.7A

Next Article ► STRYKER SR-955HP & ASYMOD III ASYMMETRICAL Hi-Fi AM & eSSB Transceiver

FM maximum deviationChoose channel 2,send 2K,30 mV signal to MIC,MIC GAIN adjust to maximum, then adjust W500,to get frequency deviation between 3.5±0.2KHZ,the deviation on channel 1、3 shall between 3-4.0 KHZ.

FM transmitting background noiseChoose channel 1、2、3,adjust output power to maximum,MIC short-circuited,the background noise shall < 50HZ

Power RSSI meterChoose channel 2, 1-2 bar for minimum power, Display 40-60 for 50W

SWR Choose channel 2, output power to maximum,adjust TC1 to get 2 bars for SWR,reverse adjusts to get just one bar

Sensitivity:Choose channel 2,send 1K signal to MIC,adjust machine output , when the frequency deviation is 1.5K,the audio output of testing machines shall between 5-9mV, SIND >40dB。。

SNRChoose channel 2,send 1K signal to MIC,adjust machine output . when the frequency deviation is 1.5k, SNR >40dB

Pre-emphasisChoose channel 2, send 1K signal to MIC,adjust testing machine output, when frequency deviation is 0.8K,fix this deviation point as 0 dB point,change modulation and testing:
0.3K:-11~-9 0.5K:-6~-4 1.5K:1~4 2K:3~5 2.50K:2~4 3K:-1~1 4K:-12-~9 5K:-20~-16

FM signalingEnter test mode,choose CTC/DCS channel ,MIC short circuited,press PTT,adjust frequency knob,adjust CTC deviation to 0.35K,when testing CTCSS,the decode frequency for the testing machine shall be ±0.5Hz of the radio channel. DCS deviation adjusts to 0.45K,with smoothing Waveform symmetry. When testing DCS,the decode signaling for the resting machine shall be same as the radio channel.

Transmitting RBChoose channel 2,adjust output power to maximum,send 1KHZ,2S signal,to check if the deviation is between 2.3-2.5k,frequency 1KHZ±10HZ.

ECHO, MON testingChoose channel 2,open ECHO function,adjust VOL, DEL, MON to maximum,Hold PTT,you shall hear your own voice from the speaker,adjust MON,the voice will change,when adjust MON to the let end MON is off,you will not able to hear your own voice from the speaker.

SWR testingChoose channel 2,adjust output power to maximum,connect 2 Parallel loads of 50R to the antenna connector,SWR display ±2 bar when it is on 2.


AM mode testing

Testing machine setup TUNE MODE set as MANUAL,TUNE FREQ set on transmitting frequency,AF ANL IN set on AM DEMOD。

AM output powerChoose channel 2,adjust to maximum power level, MIC short-circuited, adjust W11 to get power 15W±0.5W,output power for channel 1 and channel 3 > 12W,current < 5.5A

AM low powerChoose channel 2,adjust to minimum power level, MIC short-circuited, to get power 0.5W-3W,current < 3A

AM High power modulationChoose channel 2, adjust to maximum power level, input 1.25K 30MV signal to MIC, adjust V10, the frequency deviation between 95%±5%,on channel 1 and channel 3 frequency deviation between 80-100%,PEP power > 50W,current <5.8A,W501 must in middle position,do not adjust it.

AM transmitting background noise:Choose channel 1、2、3,adjust to maximum power level,MIC short-circuited,the background noise shall be < 1.5%。

SensitivityChoose channel2 ,send 1Ksignal to MIC,adjust machine output, when the frequency deviation is on 60%,the audio output of testing machines shall between 1-3mV, SIND >26dB。

SNRChoose channel 2,send a1K signal to MIC,adjust testing machine output . when the frequency deviation is on 60%, SNR >40dB

                                               You can also read ► How to adjust SWR

Pre-emphasisChoose channel 2,adjust to maximum power, send 1K signal to MIC,adjust testing machine output when frequency deviation is on 30%,fix this deviation point as 0 dB point,change modulation and testing:
0.3K:-2~1 0.5K:-2~1 1.5K:-2~1 2K:-2~1 2.50K:-2~1 3K:-6-~1 4K:-18-~13 5K:-26~-20

AM low Power residual amplitude modulationChoose channel 1、2、3,adjust to minimum power,send 1K 30 mV signal to MIC,when testing machine on FM,residual amplitude modulation need <1.2KHZ

AM High power residual amplitude modulationChoose channel 1、2、3,adjust to maximum power,send 1K 30 mV signal to MIC,when testing machine on FM,residual amplitude modulation need <1.2KHZ

AM amplitude balanceChoose channel 1、2、3,adjust to maximum power Spectrum CENTER frequency set same as testing machine,band width at 10KHZ,REF LEVEL at 50 dB,send 1.25K,30 mV signal to MIC,Observe the Waveform symmetry,the Fluctuation shall not over 2 dB。


PA mode testing

PA testingSwitch to PA mode,hold PTT,the speaker can not give out sound, connect an 8W 3R speaker to the PA port in the rear of the radio,adjust VOL,the speaker will work.


USB mode testing

Balance adjustchoose channel 2,MIC short circuited,Spectrum CENTER frequency set same as testing channel,band width at 10KHZ,AVG=5, REF LEVEL at 45 dB. Hold PTT, adjust W502 until the center frequency of the Spectrum reaches the minimum, the value shall < -8dBm in USB or LSB mode.

Noteafter testing,be sure to assemble the shield for L807.

USB high power and frequency error:Choose channel 2,adjust W6 to get 60W power,check if the frequency or the modulation signal is 1KHZ±50HZ,check if the power on channel 1 and 3is over 55W,current <10.5A,and SIND>30dB。(testing machine condition:MIC with 1K、30 mV signal,TUNE MODE: MANUAL,TUNE FREQ: with testing frequency,AF ANL IN: SSB)

USB sensitivity:choose channel 2,MIC with 1K,30 m V signal,turn power the 0,adjust MIC input value,to get -3 dB,the present value input is the sensitivity,the value shall between 0.8-2mV.


LSB mode testing

LSB power and frequency error:check if power on channel 1、2、3is over 55W,current <10.5A,SIND>30dB,check if modulation signal frequency is -1KHZ±50HZ。(testing machine condition:MIC with 1K、30 mV signal,TUNE MODE: MANUAL,TUNE FREQ: with testing frequency,AF ANL IN: SSB)

LSB sensitivity:choose channel 2,MIC with 1K,30 m V signal,turn power the 0,adjust MIC input value,to get -3 dB,the present value input is the sensitivity,the value shall between 0.8-2mV.


RX testing


Note:RF GAIN switch clockwise for increase the gain, anti-clockwise to reduce the gain. VOL switch clockwise to increase volume, anti-clockwise to reduce volume. NB/ANL function on, SP load with 8R 10W resistance. Testing machine filter with <20HZ HPF and 15KHZ LPF


High-level waveform: In AM or FM mode, RF GAIN is highest, antenna input, TP2 output, adjust T1, T2, T3, all wave shall be right and without self-collision, the margin shall be -45±2 dB, testing point TP2.
Testing machine set on :CONTROLS: ANT, CENTER FREQ: 27.065M, REF LEVEL:-30dB, SPAN:20MHZ, TRACK,AMPLITUDE:-50 dB, RORT:RF OUT。


SSB mode

USB sensitivity:Chose channel 2, when SP reach the highest value, adjust T4,T5,T6,T7,T10, to make the margin of SP output maximum, the SP margin shall > 1.0V, SIND > 11db (testing machine set on -121db, frequency add 1k on main frequency ,modulation off.

LSB sensitivity:choose channel 1, 2, 3, SP output margin shall> 1.0V, SIND > 11db(testing machine set on -121db, frequency add -1k on main frequency ,modulation off.)

RSSI meter:Choose channel 2,adjust W5 to let RSSI=-67dBm, the meter just in S9 position,in channel 1、2、3 when RSSI=-5dBm,the meter shall full bar,and on -110dBm,display 1-5 bar

SQ deepest :Choose channel 2, turn SQ switch to right end. Adjust W3, to let the speaker open on -27±2dBm. The SQ shall be open when the signal is -15dbm in channel 1, 2, 3. And off on -40dBm.

SP maximum output margin:choose channel2, when the SP is maximum, the margin shall be 5.3V±0.3V, current < 0.9A, then adjust SP to 2- 3V, the SIND shall > 35dB(testing machine set on -47dBm, modulation off)


AM mode

AM sensitivity:Choose channel 2, and adjust T12,T8,T9, to make SP output margin maximum, the SP output on channel 1,2,3 shall > 1.0v, SIND>8dB(testing machine set on -113db, 1k, 30%)

RSSI meter:choose channel 2,gain maximum,adjust W4 to let the meter in S9 position when it is -67dBm when it is -5dbm, the meter shall be the full bar, when it is -113dbm, the meter shall be the 1-5 bar.
(testing machine set on :1 K 30%)

SQ deepest:Choose channel 2, turn SQ switch to right end. Adjust W2 to let the speaker open on -27±2dBm. The SQ shall be open when the signal is -15dbm in channel 1, 2, 3. And off on -40dBm(testing machine set on:1K 30%)。
SP maximum output margin:choose channel2, when the SP is maximum, the margin shall be 4.7V±5.3V, current < 0.8A, then adjust SP to 2- 3V, the SIND shall > 30dB,SNR>30Db (testing machine set on -47dBm, 1K 30%)

AF sensitivity:choose channel 2, when the SP is maximum, the margin shall be 2.7V±3.3V(testing machine set on -47dBm, 1K 30%)

HI-CUT function:choose channel 2, when the SP is maximum, turn on HI-CUT function, the SP output shall reduce 0.4V-0.7V(testing machine set on -113dBm, 1K 30%) Note: turn off Hi-cut function after this testing.

ANL function:choose channel 2, when the SP is maximum, turn off ANL function, the SP output shall increase by 0.8V-1.2V(testing machine set on -113dBm, 1K 30%) Note: turn on ANL function after this testing.

RF GAIN function:Choose channel 2,RF GAIN adjust to minimum, SIDN shall between 8-16dB
(testing machine set on :-60dBm 1K 30%)


FM mode 

FM sensitivity:choose channel 2, SP output margin between 2- 3V,the SIND on channel 1、2、3shall >11dB(testing machine set on:-119dBm 1K 1.2K)。

SP maximum output margin:choose channel2, when the SP is maximum, the margin shall be 4.7V±5.3V, current < 0.8A, then adjust SP to 2- 3V, the SIND shall > 33dB,SNR>35dB (testing machine set on -47dBm, 1K 1.2k)

AF sensitivity:choose channel 2, when the SP is maximum, the margin shall between 3.0-3.6V(testing machine set on -47dBm, 1K 0.4K)

ASQ adjust:enter testing mode,choose AQ ON open on just -113dBm,choose AQ OFF turn off just on -116dBm

ASQ testing:Enter function menu to turn on ASQ function, the SQ shall open on -113±3dBm on channel 1,2,3 and SQ off on -119dBm. Turn of ASQ function after this testing.

CTCSS/DCS testing:In FM mode,cut OP1、OP2 point ,and install optional CTC board,testing the working of CTCSS、DCS decode(testing for first sample only)

 

 

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