User manual

120 20131-301 Gemini G3 - User Manual

5. Maintenance, Trouble-Shooting and Testing

The checks described below should be done at annual intervals or whenever deterioration in performance

is noted.

5.1 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 and 10W range)

• Radio service monitor (IFR-COM120B/C or equivalent).

• Cable with male connector (check type of connection present on unit) to connect G3 radiomodem

to the service monitor.

5.2 Basic Tests

Recommended checks:

For checks 1 to 6, refer to Table 5 - Test Checklist next page.

1. Power-up LED Sequence

2. Transm

it power output

3. Reflected power output

4. Carrier frequency

error

5. TX Deviation

6. Main RX and Aux. RX RSSI

7. RF Link test between Paragon3 unit(s) and mobile unit (PING test from the unit’s Web page as per

paragraph 4.7.7.1 or PING from a PC as per paragraph 5.4.1)

8. GPS test as per 5.3.2.

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 service is done during

winter months