Model 250S1G6
34
Rev D
4.3.9
Low or No Power Output (RF Test) (Schematic Diagram No.
10034514)
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 250S1G6’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 ≥ 55.5 dBm.
Figure 4-
2 should be ≥
58 dBm.
NOTE: If the overall gain is low, the amplifier chain can be separated
at the input of A3 Four-Way Splitter.
35
37
39
41
43
45
47
49
51
53
55
57
59
61
63
65
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
Gain
(d
B)
Frequency (GHz)
35
37
39
41
43
45
47
49
51
53
55
57
59
61
63
65
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
Gain
(d
B)
Frequency (GHz)
Figure 4-1. Typical Response at 0 dBm Input
Figure 4-2. Typical Response at –20 dBm Input
Phase matching must be maintained from the input of the A3 Four-Way Splitter to the inputs of the A29
Sixteen-Way Combiner; if coaxial cables are removed, they must be reinstalled in the same locations from
which they were removed. Replacement coaxial cable assemblies must the same lengths as the original ones.
NOTE: If the original gain is low, the amplifier chain can be separated at the input to the A3 Four-Way
Splitter and the gain checked from the input to the A3 Four-Way Splitter to the
RF OUTPUT
connector on the unit’s front panel.
