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89
Additional Information
Troubleshooting
Problem
Cause
Solution
Scanner won’t
power on.
The AC adapter or DC
adapter/cable is not
connected.
Be sure the adapter’s barrel plug is
fully plugged into the DC 13.8V jack.
The keypad does
not work.
The scanner may need
to be initialized.
Follow steps in “Initializing the
Scanner to Factory Defaults” below.
Scanner will not
scan when SCAN
is pressed
Possible “birdie”
frequency
programmed
Tighten squelch, apply attenuator or
lock out the “birdie” frequency
The scanner may
need to be reset or
initialized
Follow steps in “Initializing the
Scanner to Factory Defaults” below.
No channels
programmed, or
only one channel
programmed, or all
channels locked out
Ensure that the scanner has more
than one channel programmed and
enabled for scanning
SQUELCH control is
not adjusted properly
Turn SQUELCH control clockwise
until scanning resumes
The scanner does
not receive digital
transmission on
digital frequencies
or trunking
systems.
The digital channel
or talkgroup is not
using APCO-25 digital
modulation.
The scanner can only receive
APCO-25 C4FM/CQPSK IMBE digital
signals.
The digital channel or
talkgroup is encrypted.
The scanner will not receive
encrypted traffic.
The digital channel
or talkgroup is being
transmitted from a
distant location.
Reposition the scanner or use
an outdoor antenna to improve
reception.
Scanner scans
slowly.
SQUELCH control is
set too high.
Turn SQUELCH control counter
clockwise.
Scanner stops on
noise or silence.
Subaudible squelch
mode not set.
Set the correct subaudible squelch
mode. See
“Appendix B: Detailed Menu
Reference: Conv Menu”
on page 101.
Summary of Contents for PRO-652
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