Motorola ASTRO 25 GTR 8000 - 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

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 Figure 64: Test Equipment Set Up for Tuning VHF Duplexer
High Notch Loop Assemblies on page 170.
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.
MN003286A01-E
Chapter
5: GTR 8000 Base Radio Optimization
170