Radio Shack PRO-90 用户手册
59
PROBLEM
POSSIBLE
CAUSE
REMEDY
Poor or no
reception (con-
tinued)
reception (con-
tinued)
An antenna is
not connected or
connected incor-
rectly.
not connected or
connected incor-
rectly.
Make sure an
antenna is con-
nected to the scan-
ner.
antenna is con-
nected to the scan-
ner.
Error
appears.
Programming
error.
error.
Reprogram the fre-
quency correctly,
including the deci-
mal point.
quency correctly,
including the deci-
mal point.
In the scan
mode, the scan-
ner locks on fre-
quencies that
have an unclear
transmission.
mode, the scan-
ner locks on fre-
quencies that
have an unclear
transmission.
Programmed fre-
quencies are the
same as “birdie”
frequencies.
quencies are the
same as “birdie”
frequencies.
Avoid programming
frequencies listed
under “Birdie Fre-
quencies” on
Page 51 or only lis-
ten to them manu-
ally.
frequencies listed
under “Birdie Fre-
quencies” on
Page 51 or only lis-
ten to them manu-
ally.
Scanner will not
track a trunked
system.
track a trunked
system.
The transmission
might not use a
system that can
be tracked by
your scanner.
might not use a
system that can
be tracked by
your scanner.
Scan another trans-
mission.
mission.
The data fre-
quency is miss-
ing.
quency is miss-
ing.
Find the data fre-
quency (see “Pro-
gramming Trunked
Frequencies” on
Page 34).
quency (see “Pro-
gramming Trunked
Frequencies” on
Page 34).
The system you
are trying to
track is a Type I
system, and the
scanner is set to
scan Type II sys-
tems.
are trying to
track is a Type I
system, and the
scanner is set to
scan Type II sys-
tems.
Set the scanner to
receive Type I
trunked frequen-
cies. See “Scan-
ning Type I and
Hybrid Trunked Sys-
tems” on Page 44.
receive Type I
trunked frequen-
cies. See “Scan-
ning Type I and
Hybrid Trunked Sys-
tems” on Page 44.
Scanner will not
stop while scan-
ning a scan list.
stop while scan-
ning a scan list.
No IDs have
been stored.
been stored.
Store one or more
IDs (see “Scan
Lists” on Page 41).
IDs (see “Scan
Lists” on Page 41).
The IDs you
have stored are
not active.
have stored are
not active.
Scan another trans-
mission.
mission.
20-520.fm Page 59 Wednesday, August 4, 1999 3:06 PM