HTX-242 Two-Meter Mobile Transceiver
(190-1126) Using DTMF and Subaudible Tones FaxBack Doc. # 19149
Your HTX-242 has 10 DTMF (Dual-Tone, Multiple, Frequency - another name
for touch tones) memories where you can store DTMF sequences, DTMF Memory
0 can hold a 7-digit DTMF paging sequence your HTX-242 must receive for
DTMF paging. DTMF Memories 1-10 each hold 15 digits you can quickly
transmit.
Storing a DTMF Sequence
1. Hold down F for at least 1 second. FUNC flashes.
2. Press DTMF. The HTX-242 displays the sequence stored in the currently
selected memory.
3. Rotate TUNE, or press UP or DOWN on the microphone, to select one of
the 10 transmit DTMF memories (1-10) or the receive DTMF memory (0).
NOTE: "td" appears with transmit DTMF Memories 1-10, and "rd" appears
with receive DTMF Memory 0.
4. Press SHIFT. Then use the keypad to enter the sequence you want to
store.
NOTE: DTMF Memories 1-10 hold 15 digits each. DTMF Memories 1-10
hold 15 digits each. DTMF Memory 0 holds 7 digits.
5. Repeat Steps 3 and 4 to store more DTMF sequences, or press DTMF or
PTT to save all sequences and return to normal operation.
NOTE: To clear a DTMF sequence, repeat these steps but do not enter a
frequency in Step 4 after you press SHIFT.
Transmitting a DTMF Sequence
1. Hold F for at least 1 second. FUNC flashes.
2. Rotate TUNE, or press UP or DOWN on the microphone, to select the DTMF
memory that contains the sequence you want to transmit.
3. Press the push-to-talk button. While holding down PTT, press DTMF.
The HTX-242 transmits the stored sequence.
NOTE: If the DTMF auto send feature is turned on, the HTX-242
transmits the tones in the selected DTMF memory every time you
press PTT.
Using DTMF Page
DTMF page lets other operators page you. To turn on DTMF page, press DTMF
so DTMF appears. The HTX-242 does not pass transmissions to the speaker
until it receives the sequence you stored in DTMF Memory 0. If DTMF
Memory 0 is empty. DTMF page does not operate.
NOTES: If you turn on auto-reply, the HTX-242 immediately sends the
sequence in the currently selected DTMF memory when it receives the
sequence you set. See "Using Auto-Reply" on Faxback Doc. #19149.
If you turn on tone-alert, the HTX-242 sounds four tones when it
receives its DTMF sequence you set. See "Setting the DTMF Page and
Subaudible Tone Alert" on Faxback Doc. #19149.
If you turn on DTMF auto send, the HTX-242 opens squelch only for
transmissions that start with the sequence stored in DTMF Memory 0.
After the transmission, DTMF squelch is still turned on. See
"Using DTMF Auto Send" on Faxback Doc. #19149.
Using Group Calling
Group calling lets you page several users at once. Each user must have a
transceiver that has this feature. When the HTX-242 receives at least
three DTMF tones followed by the sequence A-B-C, it compares the DTMF tones
it received before the A-B-C with the sequence in DTMF Memory 0. If the
tones match, it operates as if it received the entire sequence.
For example, if these sequences are assigned to a group:
Name Assignment DTMF Page Sequence
George West Side 4654321
Bob West Side 4654254
Doug East Side 4651823
Bill North Side 4652252
Cary East Side 4651855
Paul South side 4653552
Kim North Side 4652183
James South Side 4653122
Beth East Side 4651931
Assuming all club members have DTMF page activated, to page everyone,
transmit 465ABC.
To page West Side members, transmit 4654ABC.
To page Doug and Cary, transmit 46518ABC.
To page only one person, transmit the 7-digit sequence.
Using Auto-Reply
If you turn on the auto-reply feature, the HTX-242 automatically sends the
sequence stored in the currently-selected DTMF memory when it receives a
DTMF page.
Follow these steps to turn on auto-reply.
1. Press VFO.
2. Hold F for at least 1 second, FUNC flashes.
3. Press MR. The HTX-242 displays the first configuration menu item.
4. Repeatedly press UP ARROW to select the AR option. Then rotate TUNE,
or press UP or DOWN on the microphone, to set the option to on.
5. Press MR or PTT to save the setting.
To turn off auto-reply, set the option to oFF in Step 4.
Using DTMF Auto Send
If you turn on the DTMF auto-send feature, the HTX-242 automatically sends
the sequence stored in the currently-selected DTMF memory every time you
press PTT.
Follow these steps to turn on auto send.
1. Press VFO.
2. Hold F for at least 1 second. FUNC flashes.
3. Press MR.
4. Repeatedly press UP ARROW to select the Ar option. Then rotate TUNE,
or press UP or DOWN on the microphone, to set the option to on.
5. Press MR or PTT to save the setting.
6. Press DTMF so DTMF is on the display.
To temporarily turn off auto send, press DTMF so DTMF is not on the
display. To turn off auto send, set the option to oFF in Step 4.
NOTES: This feature works with the DTMF page feature. If you stored a
sequence in DTMF Memory, the HTX-242 does not pass transmissions to
the speaker until it receives that sequence. After the
transmission, DTMF squelch is still turned on.
If there is no sequence stored in DTMF Memory 0, the HTX-242 still
transmits the currently selected DTMF memory sequence each time you
press PTT, but passes all transmissions to the speaker.
Using Subaudible Tones
Some repeaters require you to transmit a subaudible tone to activate them.
You can set your HTX-242 to transmit any of the 38 standard subaudible
tones. You can also limit incoming reception by setting the HTX-242 to
open the squelch only when someone transmits a subaudible tone you select.
Valid Subaudible Tones
Code Freq. (Hz) Code Freq. (Hz) Code Freq. (Hz)
XZ 67.0 1B 107.2 6Z 167.9
XA 71.9 2E 110.9 6A 173.8
WA 74.4 2A 114.8 6B 179.9
XB 77.0 2B 118.8 7Z 186.2
WB 79.7 3Z 123.0 7A 192.8
YZ 82.5 3A 127.3 M1 203.5
YA 85.4 3B 131.8 M2 210.7
YB 88.5 4Z 136.5 M3 218.1
ZZ 91.5 4A 141.3 M4 225.7
ZA 94.8 4B 146.2 M5 233.6
ZB 97.4 5Z 151.4 M6 241.8
1Z 100.0 5A 156.7 M7 250.3
1A 103.5 5B 162.2
Setting the Subaudible Tones
Some repeaters require you to transmit a subaudible tone with your
transmission. You can also set a tone that must accompany transmissions
for your HTX-242 to open squelch.
Follow these steps to set the subaudible tones for the VFO mode.
After you set the tones, you must activate the function to turn it on.
Changing this setting does not change the tones stored in any memory
channel.
1. Press VFO.
2. Hold F for at least 1 second. FUNC flashes.
3. Press T-SQL. The HTX-242 displays rC and the currently set receive
tone.
4. Rotate TUNE, or press UP or DOWN on the microphone, to set a different
receive tone. If you do not want a receive tone, select oFF.
5. Press UP ARROW. The HTX-242 displays tC and the currently set
transmit tone.
6. Rotate TUNE, or press UP or DOWN on the microphone, to set a different
transmit tone. If you do not want a transmit tone, select oFF.
7. Press T-SQL or PTT to save the settings.
Activating Subaudible Tone Transmit and Squelch
1. Press T-SQL once. T appears. The HTX-242 includes the selected
transmit tone with your transmissions.
2. Press T-SQL again. T-SQL appears. The HTX-242 includes the selected
transmit tone with your transmissions and requires the selected
receive tone to open squelch.
3. Press T-SQL a third time to turn off both subaudible tone transmit
and squelch. Neither T nor T-SQL appears on the display.
Setting the DTMF Page and Subaudible Tone Alert
When the alert function is turned on, the HTX-242 sounds a sequence of
three tones when it receives a DTMF page (if DTMF page is activated) or a
transmission that includes the correct subaudible tone (if tone squelch
is activated).
To turn on the alert function, press F then ALT. ALT appears. To turn
off the alert function, press F then ALT again. ALT disappears.
(SP 02/16/96)
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