Stryker SR-955HP User Manual

SR-955HP alignment
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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 assemble the cover, delete the factory mode by the factory software.
Do remember to reset radio to factory default after assemble the radio.
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Frequency point 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
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VCO testing
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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 darker backlight.
Check voltage： In 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 buttons： check the function, look and touch of full panel, key, switch, Knobs.
Check programming：
Program the radio with Frequency point listed in 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 not match, adjust C801 8P capacitance，Capacitance
toleration is ±2P，check other problem if it not match.
TP509：between 0.8-5.5 in all frequency band，no Fluctuation，if not match, adjust C555 4P5 capacitance，Capacitance
toleration is ±2P，check other problem if it not match.
Note：2 VCO are connected, when TP510 testing un lock，TP509 also unlock，only when TP510 locked，TP509 can be locked

Stryker SR-955HP Specifications

General

Type	CB Radio
Channels	40
Weight	3.5 lbs
Antenna Impedance	50 Ohms
Power Supply	13.8V DC
Frequency Range	26.965 MHz - 27.405 MHz
Power Output	4W AM / 12W SSB
Modulation	AM/SSB
Dimensions	9.5 x 6.5 x 2.5 inches
Microphone	Dynamic
Features	ANL

Summary

General Setup and Frequency Points

Note before testing

Important notes on voltage, setup, parameters, and factory reset procedures.

Frequency points for testing

Lists specific frequency channels (Band A, 1-3) for testing.

VCO Testing

New radio reset

Manual reset procedure using FUNC+SCAC+COLOR keys for a full reset.

Check Quiescent Current

Verify current < 400mA in AM/FM/USB/LSB modes with SQ off.

Check Display

Hold SCAN to power on to check the 2 LCD screens.

Check Backlight LED

Test LED colors (RED, GREEN, BLUE) and dimming function.

Check voltage

Verify LCD voltage against supplied voltage, adjust R521 if needed.

Check keys and buttons

Verify function, look, and touch of panel controls.

Check programming

Program radio with listed frequencies, cancel factory mode.

VCO voltage

Test TP510 (1.0-4.0V) and TP509 (0.8-5.5V), adjust C801/C555 if needed.

Frequency Adjustment

Frequency adjustment

Enter testing mode, use COLOR/FUNC keys to switch items, adjust FREQ/CLAR.

VCO frequency adjustment

Adjust L807/frequency for specific points (FRQ 320, F05, F15, F25).

BFO frequency adjustment

Test TP301 in FM/USB/LSB modes, adjust frequency and background noise.

AFF frequency adjustment

Test TP514 in FM mode, adjust frequency and background noise.

TX Testing

Note on TX Testing

Voltage, filters, DE-EMPHASIS settings, power switch behavior.

TX Voltage

Check voltage when FM power exceeds 50W.

Switch location

Set rocker switches to middle, CLAR spindle to middle, MIC GAIN to max.

Power supply voltage

Adjust W13 for 12V±0.1V in USB mode at max power.

Quiescent current

Adjust W8/W9/W7 for minimum current with MIC shorted.

Coil adjustment

Position L20/L16 and install J3/J4 jumpers before power tests.

Transmit IF Transformer Adjustment

Adjust T13/T14 for max output power in FM mode.

FM Mode Testing

Covers FM High/Low power, max deviation, background noise, RSSI, SWR, Sensitivity, SNR.

FM Signaling

Test CTC/DCS channel, PTT, CTCSS/DCS decode.

Transmitting RB

Check deviation for 1KHZ, 2S signal.

ECHO, MON Testing

Test ECHO function, VOL, DEL, MON adjustments for voice feedback.

SWR Testing

Connect parallel loads to antenna connector, check SWR display.

AM Mode Testing

Covers AM output power, low power, deviation, background noise, sensitivity, SNR, pre-emphasis.

AM Low Power Residual Amplitude Modulation

Check residual AM for low power settings.

AM High Power Residual Amplitude Modulation

Check residual AM for high power settings.

AM amplitude balance

Balance amplitude modulation spectrum center frequency.

PA mode testing

Switch to PA mode, check speaker output with 8R 3W speaker.

USB high power and frequency error

Check USB high power and frequency accuracy.

RX Testing

USB sensitivity

Adjust MIC input for -3dB, measure sensitivity between 0.8-2mV.

LSB Mode Testing

Check LSB power, frequency error, sensitivity.

LSB sensitivity

Adjust MIC input for -3dB, measure sensitivity between 0.8-2mV.

High-level waveform

Check waveform in AM/FM, ensure no self-collision, margin -45±2 dB.

SSB Mode

Covers USB/LSB sensitivity, RSSI meter, SQ deepest, SP output margin.

USB sensitivity (SSB)

Adjust SP output margin for maximum, SIND > 11db.

LSB sensitivity (SSB)

Adjust SP output margin for maximum, SIND > 11db.

RSSI meter (SSB)

Set RSSI to -67dBm (S9), -5dBm (full bar), -110dBm (1-5 bar).

SQ deepest (SSB)

Adjust W3 for speaker open at -27±2dBm, check open/off points.

SP maximum output margin (SSB)

Set SP max margin to 5.3V±0.3V, check SIND > 35dB.

AM Mode

Covers AM sensitivity, RSSI meter, SQ deepest, SP output margin.

AM sensitivity

Adjust T12/T8/T9 for max SP output margin, SIND > 8dB.

AM RSSI meter

Set meter to S9 at -67dBm, check readings at -5dBm and -113dBm.

AM SQ deepest

Adjust W2 for speaker open at -27±2dBm, check open/off points.

AM SP maximum output margin

Set SP max margin to 4.7V±5.3V, check SIND > 30dB, SNR>30Db.

AF sensitivity (AM)

Check SP output margin between 2.7V±3.3V.

HI-CUT function

Test HI-CUT effect on SP output reduction (0.4V-0.7V).

ANL function

Test ANL effect on SP output increase (0.8V-1.2V).

RF GAIN function

Adjust RF GAIN to minimum, check SIDN (8-16dB).

FM Mode

Covers FM sensitivity, SP output margin, AF sensitivity.

FM sensitivity

Check SP output margin (2-3V) and SIND (>11dB).

SP maximum output margin (FM)

Check SP max margin (4.7V±5.3V), SIND > 33dB, SNR>35dB.

AF sensitivity (FM)

Check SP output margin between 3.0-3.6V.

ASQ adjust

Enter testing mode, adjust AQ ON/OFF points.

ASQ testing

Test ASQ function, check SQ open/off levels.

CTCSS/DCS testing

Test CTCSS/DCS functionality in FM mode.