Maintenance; Birdie Frequencies - Radio Shack PRO-651 User Manual

CB – Searches the Citizens Band radio frequencies.
Marine – Searches the VHF-FM marine radio band.
FRS/GMRS/MURS/DOT/STAR (F/G/MURS)
Railroad – Searches the Association of American
Railroads (AAR) VHF railroad frequencies used in the
US and Canada.
Weather frequencies
162.400, 162.425, 162.450, 162.475, 162.500, 162.525,
162.550 MHz
Scanning Rate .................Approx. 55 channels per second
Search Rate ........................... Approx. 90 steps per second
Display
LCD with amber LED backlight, 4 lines of 16 characters
each, plus 13 display icons
Zeromatic
Automatically zeroes receiver on correct frequency
during searches
Audio Output ...............................................................250 mW
Internal Speaker ........................... 36 mm 8 ohms dynamic
Operating Voltage
6 VDC (4 AA alkaline, Ni-Cd, or Ni-MH)
External Power and Charge Voltage
9 VDC 400 mA regulated power supply
Dimensions (WxDxH) ................. 2.56 x 1.65 x 5.71 inches
......................................................................... 65 x 42 x 145 mm
Weight (not including batteries and antenna)
Approx. 8.5 ounces, 240 grams
Memory backup
No backup battery required, utilizes non-volatile
EEPROM memory
Specifications are typical; individual units might vary.
Specifications and depictions are subject to change
and improvement without notice.
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Maintenance

Keep the scanner dry; if it gets wet, wipe it dry
immediately. Use and store the scanner only in
normal temperature environments. Handle the
scanner carefully; do not drop it. Keep the scanner
away from dust and dirt, and wipe it with a damp
cloth occasionally to keep it looking new.
Modifying or tampering with the scanner's
internal components can cause a malfunction and
might invalidate its warranty and void your FCC
authorization to operate it.

Birdie Frequencies

Birdies are operating frequencies, which all scanners
have, that are created inside the scanner's receiver
and can cause interference. If the interference is not
severe, adjusting the squelch might omit the birdie, but
if you program one of these frequencies after a search
you will hear only noise on that frequency.
To find birdies in your scanner:
1. Disconnecting the antenna.
2. Make sure that no other nearby radio or TV sets
are turned on near the scanner.
3. Press TUNE and then press PSE. The scanner
will search for frequencies and occasionally stop
as if it has found a signal. This is a birdie.
4. Make a list of all the birdies in your scanner for
future reference.
5. Press L/OUT to lock out the frequency for any
future searches after you have reconnected the
antenna.
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