tablished, the transceivers at both ends are set to Code Memory 0, with the other station's
unique ID displayed). If you change your Code Memory selection to Code Memory 1, it will
then match his Code Memory 0, and all he will have to do is switch from paging to code
squelch mode.
To do this, after you have exchanged initial paging calls, press PAGE CODE twice (to
change from paging to code squelch mode), then F/W —> PAGE CODE to bring up the
code setting display, and then turn the selector knob one click clockwise (to display a
blinking 1 in the memory box). If, while you were doing this, he just changed from paging to
code squelch mode, when you again transmit he should hear you, and you hear him, without
the ringing.
With Code Squelch activated in this manner, you will hear three DTMF code digits at the
start of each of his transmissions, and your set will also transmit the same three digits when
you press your PTT switch. These digits are those stored in the current Code Memory, and
they will open the squelch of both stations. Therefore, at the start of each transmission, you
must wait a second or two after pressing the PTT switch for the DTMF code to be sent and
his squelch to open before you start speaking.
When you finish your conversation, to reac tivate DTMF Code Paging, press PAGE CODE
twice so that "PAG" is again displayed.
Auto-Transpond Paging
Normally, after a page is received, the indicator blinks on the display until you transmit to
respond to the page, or press PAGE CODE or D / MR to return to the frequency/memory
display. This lets you know if a call came in while you were distracted, but it does not let the
caller know whether you received his call, or not. The auto-transpond feature addresses this
problem. When enabled, your display still changes to show Memory Code 0 and the caller's
code, and the ringer still sounds (if it is enabled), but the radio also automatically transmits
your ID Code back to the caller. Thus he can tell that you are in range, although possibly not
able to answer his page right away.
To activate auto-transpond, just press the RPT button while the DTMF Code setting display
is active. An "R" appears to the right of the displayed Memory Code when the feature is
enabled.
Note that auto-transpond is not Code Memory-specific: it is either enabled or disabled for all
paging calls (including groups).
DTMF Code Delay
When calling other stations with DTMF paging or code squelch, particularly through
repeaters, you may find some are unable to receive your calls. This can be caused by their
receiver squelch not opening fast enough (after receiving your carrier) to allow all of the
DTMF codes to be received and decoded. To correct this problem, you can set a longer delay
between the time your transmitter is activated and the time that the first DTMF digit is
transmitted.
Press F/W — > PAGE CODE, if necessary, to activate the DTMF Code setting display (the
number in the memory box blinks). Then press D / MR, to toggle the DTMF Code delay
between 250 and 750 ms (an "L" appears at the left side of the DTMF Code when the longer
delay is selected.
As with the auto-transpond feature, the DTMF Code Delay selection applies to all Paging
Codes.
In Case of Problems
Although basic operation of the FT-2400H is simple, some of the newer features may seem
somewhat complicated at first. The small number of controls belies the variety of features
that are available, and some buttons have more functions than are indicated by their labels.
So it is not difficult to get lost, at least until you have had the chance to familiarize yourself
with all of the features. This section provides some tips to help you navigate the various dis-
play and button modes.
If the display shows nothing at all, push the power switch, and check the power supply con-
nections and the fuse in the power cable pigtail. If the fuse is blown, you will need to find
out and correct the cause before replacing it. Replace the fuse only with one of the same type
and capacity: 15-A, fast-blow.
The display usually tells a lot about the current state of operation. With the FRC-6 option
installed, the display can take on many different states. Most of these are shown at the right,
together with the button to press in each case to return to the main (operating frequency) dis-
play. You will also see a (programmable) 4-letter word displayed in place of frequency when
a named memory is displayed. Pressing A/N STEP, will display the frequency. Except for
the main frequency and the memory name displays, most or all of the other buttons will be
disabled anyway.
It is well worthwhile to study the main frequency display diagram on page 6 carefully. This
display is the basis for basic operation. For example, if the frequency display changes
unexpectedly when you transmit (or if "Err" appears), check for a small" + " or "—" at the
top center, indicating that repeater shift is active, but that the resulting transmit frequency is
out of range.
If the main frequency or memory name display is visible, but pressing a button appears to do
nothing, first check for "LOCK" at the top left corner of the display. If you see it, press F/W
-> LOW LOCK unlock the buttons. Otherwise, you can press the D/MR button, which will
usually terminate any partially entered commands.
If the number in the memory box is blinking, the display is showing a DTMF Memory Code.
This occurs spontaneously when a DTMF page is received. Press PAGE CODE to return the
frequency display to normal.
If you still cannot enter data, check to see if the "TX" indicator near the upper left of the
display is on, indicating that the transceiver is transmitting. Releasing the PTT switch should
return the set to receive. If still nothing happens, switch the transceiver off, and then back on.
If the display shows all segments at the same time, or shows "C-Rx" and you cannot turn the
set off, you may have inadvertently started memory cloning - press the PTT switch (the
display will change to "Err", and then hit the power switch to return to normal operation.
As a last resort, if you are unable to gain sensible control of the transceiver, reset the CPU as
described in the next section.
To avoid confusion resulting from inadvertent button presses, set the keypad lock on (press
F/W —» LOW LOCK) if you leave the transceiver unattended while it is on. Remember to
set the lock back off when you wish to enter data.
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Summary of Contents for FT-2400H
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