3-19
Procedure :
(1) Local sweep adjustment
Initialize the spectrum analyzer and the MG3633A.
1) Set the spectrum analyzer to :
Center frequency, 100 MHz
Span, 100 kHz
Set the MG3633A output to :
LEVEL, -10 dBm
Frequency, 100 MHz (CW)
Press “→CF” key of the spectrum analyzer.
2) Set the MG3633A output frequency to 99.96 MHz (CW).
On the spectrum analyzer, press “Peak Search” key, and set the marker function to delta maker mode (Press
“Marker” key and press “F2” key).
3) Set the MG3633A output frequency to 100.04 MHz (CW).
On the spectrum analyzer, press “Peak Search” key, and read the frequency difference between 99.96 MHz input
and 100.04 MHz input.
4) Adjust the variable resistor R123 on LOCAL-SP2 (refer to Fig. 3-2-4) until the reading of frequency difference
becomes 80 kHz ±200 Hz, to repeat the procedure 2), 3).
(2) YTO FM sweep adjustment
Initialize the spectrum analyzer.
1) Set the spectrum analyzer to :
Center frequency, 1000 MHz
Span, 10 MHz
Set the MG3633A output to :
Frequency, 1000 MHz (CW)
Press “→CF” key of the spectrum analyzer.
2) Set the MG3633A output frequency to 996 MHz (CW).
On the spectrum analyzer, press “Peak Search” key, and set the marker function to delta maker mode (Press
“Marker” key and press “F2” key).
3) Set the MG3633A output frequency to 1004 MHz (CW).
On the spectrum analyzer, press “Peak Search” key, and read the frequency difference between 996 MHz input
and 1004 MHz input.
4) Adjust the variable resistor R53 on RF CONVERTER (refer to Fig. 3-2-4) until the reading of frequency differ-
ence becomes 8 MHz ±40 kHz, to repeat the procedure 2), 3).
3.2 Troubleshooting
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