“CTCSS Bell" Paging with the FTS-17A
CTCSS Bell operation is very similar to the CTCSS encode/decode operation just described,
in that subaudible tones open the squelch. However, if you are waiting for a call, it is
sometimes convenient to have the transceiver "ring" to get your attention. The CTCSS Bell
mode displays a small bell above the 10's-of-MHz frequency digit on the display (or to the
left of the name, if displaying a memory by name). When you receive a matching CTCSS
call, the small bell on the display blinks to indicate you received a call, and the transceiver
rings like a telephone if you have the ringer enabled (see box below). To activate the CTCSS
Bell:
O Tune to the desired frequency or memory.
O Select a CTCSS tone frequency using the F/W and TONE buttons as described on the
previous page, if you have not already.
Ringer Alerting Tone
You can control the way the transceiver rings when either a selective call (CTCSS Bell, or
DTMF Page) is received. You can set the ringer to sound differently for each of these modes.
To check or change the state of the ringer, press and hold F/W for V^-second, then press £D
/ MRg. The number in the center of the display indicates the length of each ring, and can be
set to 0, 1, 3, 5 or 8 (ringing tone pairs) with the selector knob or mic buttons (0 = no
ringing).
The display also shows either "P" (for DTMF pager) or "b" (for CTCSS Bell) in the memory
box, indicating to which response mode the displayed ringer length setting applies. Press ""j
to display and allow changing the other mode's ringer setting.
There may also be a letter "S" displayed just above the VOL control. If present, the ringer is
set to ring only once (single ring) when a call is received. If it is not displayed, the ringer will
sound when a call is received, and every 2 minutes thereafter until reset by the PTT, or
corresponding tone button. Press theF/W button to toggle between single and multiple
ringing.
When you expect to receive calls from stations using tone squelch (decoding, or CTCSS Bell
at their end), activate tone squelch encode/decode operation as described above, so they will
not miss your signal when you turn off the CTCSS Bell later to reply.
Press F/W -» CALL BELL to activate CTCSS Bell paging (the small bell icon will appear).
As with CTCSS decoding, all calls without a matching CTCSS tone will be ignored by your
receiver, but those with the matching tone will cause the transceiver to ring and the squelch
to open while the caller transmits. The bell icon begins to blink, and continues until you
manually reset it (by pressing the PTT switch to transmit, retuning, or pressing D/MR). Note
that the other station does not need to be using the CTCSS Bell function to call you: they can
use normal CTCSS encode-only (or encode/decode) functions of their transceiver.
When you receive a call, if you have the ringer enabled, you will need to disable the CTCSS
Bell feature to prevent ringing every time the other station transmits: press F/W — > CALL
BELL to turn it off.
The CTCSS Bell system is not memory-specific: turning it on or off affects the dial and all
memories.
Note: If you activate the Bell without having an FTS-17A installed, it will ring every time
the squelch opens.
DTMF Paging & Code Squelch (with the FRC-6 Option)
The FRC-6 option includes a DTMF tone encoder/decoder and a dedicated microprocessor
providing paging and selective calling features under DTMF control. The paging and code
squelch systems use 3-digit numeric codes (000 ~ 999), transmitted as DTMF (Dual-Tone,
Multi-Frequency) tone pairs. The FRC-6 has eight Code Memories in which to store 3-digit
DTMF paging codes.
The primary function of the DTMF signalling system allows your receiver to remain silent
until it receives one of the stored 3-digit codes. Then the squelch opens so the caller is heard,
and in the paging mode, the transceiver also rings like a telephone (if desired - see the box on
the previous page). When you close the PTT to transmit, the same three prestored DTMF
code digits are sent automatically. In the paging mode, three more DTMF digits are also sent,
representing your personal station identification.
The DTMF paging and code squelch systems are selected by the PAGE CODE button. Either
"PAGE" or
"CODE" appears at the top of the display when DTMF paging or code squelch is activated,
respectively.
DTMF Code Squelch
The code squelch mode is very simple. Both you and the other station communicate using
the same 3-digit DTMF sequence, sent automatically by the FT-2400H at the start of every
transmission. Your receiver normally remains silent to all signals that are not prefixed by
your selected 3-digit code. After you receive the tones, your squelch opens and stays open
during their transmission.
To use the code squelch mode, you must first store and then manually select the one Code
Memory holding the 3-digit DTMF code required to open both your squelch and that of the
other station (as described on the following pages). Also, in the code squelch mode, Code
Memories 1-7 always function the same — the distinctions and special settings described
below for the paging mode do not apply.
In either code squelch or paging modes, any DTMF-equipped station can call you (they can
use a DTMF keypad to send the three digits if you are in code squelch mode, or six digits if
you are in paging mode).
DTMF Paging
In the DTMF paging mode, you can receive signals that are prefixed with any of up to seven
different pre-stored 3-digit codes, according to the way you program the Code Memories.
When you receive a paging call, the selected Code Memory changes automatically, and the
display responds by displaying a Code Memory number (blinking) in the memory box, and
with the 3-digit DTMF code of the caller in place of the frequency display. The meaning of
the Code Memory number and 3-digit code displayed depends on how you stored the paging
code:
Individual Codes
These are personal ID codes to identify each station uniquely. You store one of these for
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Summary of Contents for FT-2400H
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