120 20120-211
Gemini
PD+
Installation Guide
13
4. Trouble-Shooting and Testing
The checks described below should be done at annual intervals or whenever deterioration in per-
formance is noted.
4.1 Equipment Required
•
13.8 VDC (nominal) car battery, or
13.8 VDC/20A regulated power supply (In the case the unit is not installed in a vehicle)
•
In-line watt meter (50W range)
•
Radio service monitor (IFR or equivalent).
•
Cable with mini-UHF male connector to connect Gemini
PD+
to the service monitor.
•
WinRIS version 4.14 or later as detailed in paragraph 4.1.1 below
4.1.1 WinRIS
To find out how to launch the Windows-based Radio Installation Software (WinRIS), please refer
to the readme.txt file on the application’s installation diskette. This application is used for align-
ment, firmware auto-upgrade, and is a system-testing tool. For functional details of the numerous
buttons and menu-selectable items available, please refer to the program’s context sensitive help.
It is also possible to access the help information via the F1 key.
4.2 Basic Tests
Recommended checks:
1.
Transmit and Reverse power output
2.
Carrier frequency error
3.
Frequency deviation
4.
Receivers RSSI Check
5.
RF Data Link test between a Gemini unit and a base station.
6.
GPS test (not required on Gemini
PD+
Lite model).
- For checks 1 to 5, refer to Table 4 – Test Checklist below.
- For check 6, refer to paragraph 4.3.2 - GPS Test.
Important note: Before proceeding make sure that the service monitor has been recently
calibrated and has warmed up for at least the time specified by its manufacturer.
Some reported frequency and deviation problems have actually been erroneous indications from
service monitors that have not adequately warmed up. This is particularly likely when field serv-
ice is done during winter months
.
