Model 60/40S1G18B
Rev A
37
If the A4/A5 20-watt modules are normal, check the response of the A1A2 Driver Amp. The gain should
be approximately 18-20 dB. See Figure 4-11 for a typical A1A2 Driver Amp response.
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S2
1,
d
B
Freq, GHz
Figure 4-11. Typical A1A2 Driver Amp Response
4.
If the A1A2 Driver Amp is normal, check the A1A1 Pre-Amp. The gain of the A1A1 Pre-Amp should be
approximately 18-20 dB with the gain control at maximum. The typical A1A1 Pre-Amp response is
shown in Figure 4-12.
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5
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19
S2
1,
d
B
Freq, GHz
Figure 4-12. Typical A1A1 Pre-Amp Response
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