31
Squelch (SQ) Mode
The scanner can be set to the following SQ modes.
• Carrier SQ mode (default setting)
The scanner will stop on any transmission or squelch opening, regardless of whether any
sub-audible tone has been programmed for the channel or search range.
• Tone SQ mode
The scanner will stop on any active frequency for which either no sub-audible tone has
been programmed or for which the user-programmed sub-audible tone is also active.
• Tone Search mode
During any transmission, the scanner will begin searching all possible sub-audible tones,
one of which may also be in use. The scanner counts up through the CTCSS tones and
instantly determines any possible DCS tone. See Page 83 for a listing of the tones that the
BC780XLT decodes.
Note: When Tone Search is active in Scan Mode, once the CTCSS/DCS display flashes a
tone repeatedly (meaning that it has found the tone match), you can press
E
to
program that frequency with the captured tone. When you change the mode to Tone
Squelch from Tone Search, that frequency and tone will be programmed.
• Tone Lock (out) mode
For either a memory channel or a search range, you can lock a particular sub-audible tone
by pressing
L/O
after scrolling to the desired tone. The scanner will stop on any
transmission except those which may be using the locked sub-audible.
To set your scanner, enter into the menu mode.
1. Press
MENU
.
2. Press ▲ or ▼ to select SYSTEM DATA and then press
E
.
3. Press ▲ or ▼ to select SQ MODE and then press
E
.
4. Press ▲ or ▼ to select one type (CSQ, Tone SQ, Tone Search) and then press
E
.
5. To set Tone Lock mode, do the following first, then select Tone SQ in step 4.
1) For scan mode, enter CH DATA - CH No. - TONE DATA, select CTCSS/DCS with
▲ or ▼, set Tone Lock ON by pressing
L/O
.
2) For search mode, enter SEARCH EVENT - TONE DATA, select CTCSS/DCS with
▲ or ▼, set Tone Lock ON by pressing
L/O
.
BC780XLT1.qxd 10/08/2000 5:02 PM Page 31
