Motorola ASTRO 25 GTR 8000 User Manual

• Tuning tool (thin blade) (VHF)
•
N-to-N bullet connector (UG29A/U or equivalent)
• 7/16-inch Nutdriver (UHF)
• 7/16-inch Open End Wrench (UHF)
• N-to-BNC Adapter (UG349A/U)
• N-to-N Connector (UG57B/U)
5.10.3
Tuning a 700/800 MHz Duplexer
No field tuning is needed on a 700 MHz or 800 MHz duplexer. The duplexers are pre-tuned to operate
over the entire sub-band.
5.10.4
Tuning a VHF Duplexer
The following procedures are most easily performed with the duplexer module removed from the rack
or cabinet. Know the transmit and receive frequencies for the particular base radio before beginning.
If the duplexer module is tuned according to instructions and does not meet specifications for return
loss, insertion loss, and/or isolation, the duplexer must be returned to the Motorola Solutions Support
Center (SSC) for repair.
5.10.4.1
VHF Duplexer Tuning Setup
Perform the tasks in Setting Up for VHF Duplexer Tuning on page 167 before tuning the VHF duplexer
module. See Figure 61: VHF Duplexer Tuning Setup on page 167.
MN003286A01-E
Chapter
5: GTR 8000 Base Radio Optimization
166

Motorola ASTRO 25 GTR 8000 Specifications

General

Brand	Motorola
Model	ASTRO 25 GTR 8000
Category	Radio
Language	English