Vhf Duplexer High Notch Loop Assemblies Tuning Set Up; Figure 64: Test Equipment Set Up For Tuning Vhf Duplexer High Notch Loop Assemblies; Tuning Vhf Duplexer High Notch Loop Assemblies - Motorola ASTRO 25 GTR 8000 Manual

MN003286A01-E
Chapter 5: GTR 8000 Base Radio Optimization
5.10.4.4

VHF Duplexer High Notch Loop Assemblies Tuning Set Up

Figure 64: Test Equipment Set Up for Tuning VHF Duplexer High Notch Loop Assemblies

5.10.4.4.1

Tuning VHF Duplexer High Notch Loop Assemblies

Procedure:
1 Set up test equipment as shown in
High Notch Loop Assemblies on page
2 Using the tuning tool, adjust trimmer screws for cavity # 1 to obtain minimum reading on
millivoltmeter. (Adjust trimmer screws equally to obtain minimum. Reduce the range on the
millivoltmeter as necessary to reach true minimum reading.)
3 Repeat steps 1 and 2 for cavities 2 and 3.
170
Figure 64: Test Equipment Set Up for Tuning VHF Duplexer
170.