Motorola ASTRO 25 GTR 8000 - Figure 67: Verifying VHF Duplexer Insertion Loss - Connecting Duplexer Cable Assembly; Verifying VHF Duplexer Insertion Loss

Figure 67: Verifying VHF Duplexer Insertion Loss — Connecting Duplexer Cable Assembly
5.10.4.6.1
Verifying VHF Duplexer Insertion Loss
Procedure:
1 Connect test equipment as shown in Figure 66: Verifying VHF Duplexer Insertion Loss —
Connecting Test Equipment on page 172.
2 Observe and note the level in dBm as shown on the millivoltmeter.
3 Connect the duplexer cable assembly and test equipment to the duplexer as shown in Figure 67:
Verifying VHF Duplexer Insertion Loss — Connecting Duplexer Cable Assembly on page 173.
4 Observe and note the level in dBm as shown on the millivoltmeter.
5 Subtract the absolute number noted in step 2 from the number noted in step 4. The difference
should be less 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.
MN003286A01-E
Chapter
5: GTR 8000 Base Radio Optimization
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