13
Alignment
Sub Receiver Front-end Adjustment
Setup the test equipment as shown below.
Set the RF Signal Generator output to 156.525 MHz,
at a level of +10dBµ, ±3.0 kHz deviation with a 1 kHz
audio tone.
Adjust
L1006
,
L1007
, and
L1008
in order for maxi-
mum indication on the DC voltmeter.
TX Deviation Adjustment
Setup the test equipment as shown below.
Set the AF Signal Generator output to 200 mVrms at 1
kHz.
Set the channel to CH16.
With the PTT switch pressed, adjust
VR1003
so that
the maximum deviation is 4.4 kHz ± 0.1 kHz.
Release the PTT switch, then set the AF Signal Gen-
erator output to 1 Vrms at 100 Hz.
With the PTT switch pressed, adjust
VR1004
so that
the maximum deviation is 4.4 kHz ± 0.1 kHz.
Release the PTT switch.
Receiver Front-end Adjustment
Setup the test equipment as shown below.
Set the spectrum analyzer as shown below:
CENTER: 159.000 MHz
SPAN: 20.000 MHz
RBW, VBW: 30 kHz
SWP: 200 ms
Set the channel to CH01A.
Adjust
L1001
,
L1002
,
L1003
,
L1004
, and
L1005
until
the wave form shown in below is obtained.
Spectrum
Analizer
Tracking
Generator
ANT
TP1004
GX3000S
DC Voltmeter
RF Signal
Generator
ANT
TP1009
GX3000S
AF Signal
Generator
Deviation
Meter
50-ohm
Dummy Load
Sampling
Coupler
ANT
J2006
Pin 2
GX3000S
AF UNIT A
LIGNMENT
P
OINT
P
IN
2 of J
2006
GX3000S-FRONT-END
ATTEN 10dB
RL 10.0dBm
10dB/
CENTER 159.00 MHz
RBW 300 kHz VBW 300 kHz
SPAN 20.00 MHz
SWP 200 ms
Содержание MATRIX GX3000S
Страница 1: ...1 SERVICE MANUAL 25 Watt VHF FM Marine Transceiver MATRIX GX3000S EM014N90A ...
Страница 4: ...Exploded View Miscellaneous Parts 4 Note ...
Страница 5: ...5 Connection Diagram ...
Страница 6: ...6 Block Diagram ...
Страница 10: ...10 Circuit Description Note ...
Страница 16: ...16 Alignment Note ...
Страница 18: ...18 RF Unit Note ...
Страница 30: ...30 RF Unit Note ...
Страница 32: ...32 AF Unit Note ...
Страница 40: ...40 AF Unit Note ...
Страница 42: ...42 CNTL Unit Note ...
Страница 49: ...49 CONT 1 Unit Circuit Diagram ...
Страница 51: ...51 MIC Unit Circuit Diagram ...