Standard Horizon Matrix GX3000E, Руководство по обслуживанию

Страница: 13 / 66

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 +10dB
μ , ±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 un-
til the wave form shown in below is obtained.
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
P
IN
2 of J
2006
AF UNIT A
LIGNMENT
P
OINT
AF Signal
Generator
Deviation
Meter
50-ohm
Dummy Load
Sampling
Coupler
ANT J2006
Pin 2
GX3000S/E
Spectrum
Analizer
Tracking
Generator
ANT TP1004
GX3000S/E
DC Voltmeter
RF Signal
Generator
ANT TP1009
GX3000S/E