1792 VHF Radio
User's Manual
12
4. MAINTENANCE
The Model 1792 VHF Radio requires no maintenance, other than the recommended periodic checks
outlined below. If transmission problems should arise, perform the Annual Revalidation procedures
described in below. If the problem persists, contact All Weather, Inc. Customer Service.
4.1
PERIODIC MAINTENANCE
Periodic maintenance of the Model 1792 VHF Radio is divided into three categories within the
maintenance cycle: monthly, triannual, and annual maintenance procedures.
4.1.1 Monthly Maintenance
Check the cabling for integrity. Verify the voice output. Verify the Tx LED illuminates when voice
output is activated.
4.1.2 Triannual Maintenance
Triannual maintenance of the VHF radio is identical to that specified in the monthly maintenance
procedure.
4.1.3 Annual Revalidation
The following list gives the test equipment required during annual revalidation.
Radio Test Equipment:
Power Meter
Bird Watt Meter Model 43 or equivalent
Forward/Reflected Power
Tester
Bird Watt Meter Model 43 w/ 10C elements or equivalent
Frequency Meter
Aeroflex 3500 or equivalent
Modulation Meter
Aeroflex 3500 or equivalent
Deviation Meter
Aeroflex 3500 or equivalent
When VHF antenna cables are longer than 50 feet, tests must be repeated at the antenna end of the
cable.
Power Level
1.
Remove power from the VHF radio by turning the power switch on the radio’s front panel off.
2.
Connect the power meter between the RG58 connector on the front end of the CDP rear panel
and terminate with the antenna or a dummy load. See Figure 8.
