AR 10046836, Operating And Service Manual

Page: 58 / 62

Model 500W1000C
38 Rev A
2. Remove the coaxial cable from the output of the
A2 Driver Amplifier to the input of the A5
Eight-Way Splitter. The typical response from
the input of the A5 Eight-Way Splitter to the
RF OUTPUT connector on the unit’s front panel
is shown in Figure 4-3.
If the response is normal, see Step 7. If the
response is abnormal, perform the following
tests.
Figure 4-3. Typical Response: Input A5–Front
Panel RF Output
3. If the gain is slightly low (i.e., several dB below
typical), try disconnecting the inputs from the
A6–A13 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 4-4.
Figure 4-4. Typical Module Response
4. If the typical gain response to each module (A6-A13) is normal, check the 8-way splitter (A3) and the 8-
way combiner (A14) for proper performance.