How To Verify Vhf Duplexer Insertion Loss; Verifying Vhf Duplexer Isolation; Figure 5-10 Verifying Vhf Duplexer Isolation - Connecting Test Equipment - Motorola GTR 8000 Manual

5.9.4.6.1 How To Verify VHF Duplexer Insertion Loss

Procedure Steps
1 Connect test equipment as shown in
2 Observe and note the level in dBm as shown on the millivoltmeter.
Connect the duplexer cable assembly and test equipment to the duplexer as shown in
3
4 Observe and note the level in dBm as shown on the millivoltmeter.
Subtract the absolute number noted in step 2 from the number noted in step 4. The difference should be less
5
than 1.3 dB to meet specification for Insertion Loss.
6 Repeat steps 1 through 5 for Low-Pass/High-Notch cavities with the following exceptions:
a. Set the service monitor to Rx or Tx frequency, whichever is LOWER
b. Connect service monitor to Low Pass duplexer input (cavity # 1)
c. Connect terminator to cavity #6.

5.9.4.7 Verifying VHF Duplexer Isolation

Figure 5-10 Verifying VHF Duplexer Isolation — Connecting Test Equipment
6871022P86-A - November 2012
Figure 5-8.

5.9.4.6.1 How To Verify VHF Duplexer Insertion Loss

Figure 5-9.
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