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Stryker SR-955HP - RX Testing; USB sensitivity; LSB Mode Testing; LSB sensitivity

Stryker SR-955HP
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USB sensitivitychoose channel 2MIC with 1K30 m V signalturn power the 0adjust MIC input valueto get -3 dB
the present value input is the sensitivitythe value shall between 0.8-2mV.
LSB mode testing
LSB power and frequency errorcheck if power on channel 123is over 55Wcurrent <10.5ASIND>30dBcheck if
modulation signal frequency is -1KHZ±50HZtesting machine conditionMIC with 1K30 mV
signalTUNE MODE: MANUALTUNE FREQ: with testing frequencyAF ANL IN: SSB
LSB sensitivitychoose channel 2MIC with 1K30 m V signalturn power the 0adjust MIC input valueto get -3 dB
the present value input is the sensitivitythe value shall between 0.8-2mV.
RX testing
NoteRF 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 SPAN20MHZ
TRACKAMPLITUDE-50 dB RORTRF OUT
SSB mode
USB sensitivityChose channel 2, when SP reach 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 sensitivitychoose 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 meterChoose channel 2adjust W5 to let RSSI=-67dBm, the meter just in S9 positionin channel 123 when
RSSI=-5dBmthe meter shall full barand on -110dBmdisplay 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 marginchoose 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 sensitivitychoose 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 meterchoose channel 2gain maximumadjust W4 to let the meter in S9 position when it is -67dBm, when it is -5dbm,
the meter shall be full bar, when it is -113dbm, the meter shall be 1-5 bar.
testing machine set on 1 K 30%
SQ deepestChoose 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 -40dBmtesting machine set on1K 30%)。
SP maximum output marginchoose 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%)