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the microphone to see the RF output power levels. Release PTT to see
incoming signal strengh.
Calibrate Standing Wave Ratio (SWR)
Check and calibrate the SWR to ensure that you are using power
effectively.
1. Press S/RF/CAL/SWR until CAL and a vertical status bar display on
the LCD screen to indicate you are in Calibration mode. No bar
graph status levels display.
2. Press and hold PTT; bar graphs status levels display the current
level. While still holding PTT, turn Channel Selector to adjust the
levels up or down.
3. Release PTT. Press S/RF/CAL/SWR until the LDC displays SWR and
1.5, 2, and 3.
4. Press PTT to see if the new calibration is between 1.5 and 2.
Repeat these steps until the calibration level is between 1.5 and 2.
PREVENTIVE MAINTENANCE
Every six months:
1. Check the SWR.
2. Be sure all electrical connections are tight.
3. Inspect antenna coaxial cable for wear or breaks in shielding.
4. Be sure all screws and mounting hardware are tight.
MAINTENANCE
The Bearcat 880 is designed to give you years of trouble-free service.
There are no user-serviceable parts inside. Except for the fuse in the DC
power cord, no maintenance is required.
To replace a blown fuse:
1. Press ends of the fuse holder together. Twist to open. Carefully
separate the two pieces.
2. Remove the fuse and inspect. If blown, replace with the same
type fuse.