Stryker SR-955HP Alignment Manual Download Page 4

Testing machine setup

  TUNE    MODE set as MANUAL

TUNE

 

FREQ set on transmitting frequency

AF

 

ANL

 

IN set on 

AM    DEMOD

 

 

AM output power

Choose 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 power

Choose channel 2

adjust to minimum power level, MIC short-circuited, 

to get power 0.5W

-3

W

current < 3A

 

 

AM High power modulation

Choose 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 back 

ground noise shall be < 1.5%

 

 

Sensitivity

Choose 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

 

 

SNR

Choose channel 2

send a1K signal to MIC

adjust testing machine output . when the frequency deviation is on 60%

 

SNR >40dB

 

 

Pre-emphasis

Choose 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 modulation

Choose 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 modulation

Choose 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 balance

 

Choose 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

 

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PA mode testing

 

PA testing

Switch to PA mode

hold PTT

the speaker can not give out sound, connect a 8W 3R speaker to the PA port in the 

rear of the radio

adjust VOL

the speaker will work. 

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USB mode testing

 

Balance adjust

choose 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 reach minimum, 

the value shall < 

-8dBm in USB or LSB mode. 

Note

after 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  for  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

 

Summary of Contents for SR-955HP

Page 1: ... 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 R5...

Page 2: ... 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 adjustment Enter 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 ...

Page 3: ...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 noise Choose channel 1 2 3 adjust output power to maximum MIC short circuited the background noise shall 50HZ Power RSSI meter Choose channel 2 1 2 bar for minimum power Display 40 60 for 50W SWR Choo...

Page 4: ...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 modulation Choose 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 modulation Choose channel 1 2 3 adjust to maximum power send 1K 30 mV signal to MIC when testing machine on FM residual amplitu...

Page 5: ...ND 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 di...

Page 6: ...y 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...

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