AR 10047590, Руководство по эксплуатации и обслуживанию

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Model 125S1G2z5
34 Rev A
Phase matching must be maintained from the input of the A3 Two-Way Splitter to the inputs of the A10 Four-
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 Two-Way
Splitter and the gain checked from the input to the A3 Two-Way Splitter to the RF OUTPUT
connector on the unit’s front panel.
2. Remove the coaxial cable from the
output of the A2 Driver Amplifier to the
input of the A3 Two-Way Splitter. The
typical response from the input of the
A3 Two-Way Splitter to the
RF OUTPUT connector on the unit’s
front panel is shown in Figure 4-2.
If the response is normal, see Step 7. If
the response is abnormal, perform the
following tests.
Figure 4-2. Typical Response: Input A3–Front Panel RF
Output
3. If the gain is slightly low (i.e., several
dB below typical), try disconnecting the
inputs from the A6–A7 Final Module
one at a time, then reconnect them.
Note the difference in response when
disconnecting the module; if any
module causes less of a change in gain
than the others, check the module and
the coaxial cable associated with that
module. Typical module response is
shown in Figure 4-3.
Figure 4-3. Typical Module Response
4. If the typical gain response to each module (A6-A7) is normal. check the Two-way splitter (A3) and the
Two-way combiner (A10) for proper performance.