AR 1000W1000G, Руководство по эксплуатации и обслуживанию, Страница: 58 / 70

Model 1000W1000G
38 Rev A
6. Check the voltage on the feed thru caps of the A1 Pre-Amp, with the RF gain control at maximum
gain. Troubleshoot any incorrect voltages.
C1
+24.0 V ± 0.5 V
C2 –15.0 V ± 0.5 V
C3 +4.7 V
±
0.5 V
7. Check the voltages on the feed thru caps of the A6-A21 Final Amplifiers.
C50
+24.0 V
±
0.3 V
C51 –15.0 V ± 0.3 V
4.3.9 Low or No Power Output (RF Test) (Schematic 10045618)
NOTE: The DC Tests specified in Section 4.3.8 should be completed before conducting the RF tests
specified in the following sections.
1. The Model 1000W1000G’s typical gain response at 0 dBm input and -20 dBm input is shown in
Figures 4-1 and 4-2. The actual gain may vary considerably from that shown in Figure 4-1 but should
be ≥ 60 dBm. Figure 4- 2 should be ≥ 6 4.0 dBm. NOTE: If the overall gain is low, the amplifier
chain can be separated at the input of A3 Two-Way Splitter.
Figure 4-1. Typical Response at 0 dBm Input