HTX-212 Two-Meter Mobile Transceiver
(190-1125)                 DTMF/Subaudible Tones      Faxback Doc. # 19133

Your HTX-212 has seven DTMF (Dual-Tone, Multiple Frequency - another name
for "touch tones") memories where you can store DTMF sequences.  DTMF
Memory 0 can hold a seven-digit DTMF paging sequence your HTX-212 must
receive for DTMF paging.  DTMF Memories 1-6 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-212 displays "td, DTMF 1." and the current
    sequence stored in DTMF Memory 1.

3.  Rotate TUNE, or press UP or DOWN on the microphone, to select one 
    of the six transmit DTMF memories (1-6) or the receive DTMF memory
    (0).

    NOTE: "td" appears before DTMF Memories 0-6, and "rd" appears before
          DTMF Memory 0.

4.  Press SHIFT. Then use the keypad to enter the sequence you want to
    store.

    NOTE:  DTMF Memories 1-6 hold 15 digits each. DTMF Memory 0 holds 7
           digits.

5.  Repeat Steps 3 and 4 to store more DTMF sequences, or press DTMF 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.  If DTMF is not on the display, press DTMF.

    NOTE:  If the DTMF memory that contains the sequence you want to
           transmit is already selected, skip to Step 6.

2.  Hold F for at least 1 second. FUNC flashes.

3.  Press DTMF.

4.  Rotate TUNE, or press UP or DOWN on the microphone, to select the
    DTMF memory that contains the sequence you want to transmit.

5.  Press DTMF.

6.  Press the push-to-talk button.  While holding down push-to-talk,
    press DTMF.  The HTX-212 transmits the stored sequence.

USING DTMF PAGE

DTMF page lets other operators page you through your HTX-212.  To turn on
DTMF page, press DTMF so DTMF appears on the display.  The HTX-212 does
not pass any transmission to the speaker until it receives the DTMF
sequence you stored in DTMF Memory 0.  If DTMF Memory 0 is empty, DTMF
page does not operate.

When you receive a DTMF page, the HTX-212 turns on the speaker and turns
off DTMF page.

NOTES:  If you turn on auto-reply, the HTX-212 sends the sequence in the
        currently selected DTMF memory when it receives the DTMF sequence
        you set.  See "Using Auto-Reply," Faxback Doc.#     , below.

        If you turn on tone-alert, the HTX-212 sounds three tones when it
        receives its DTMF sequence you set.  See "Setting the DTMF Page
        and Subaudible Tone Alert," below.

Using Group Calling

Group calling lets several users be paged at once.  Each user must have a
transceiver that has this feature.  When the HTX-212 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 tones stored in DTMF Memory 0.  If 
the tones match, it operates as if it received the entire sequence.

For example, if these page 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-212 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-212 displays the first configuration menu item.

4.  Repeatedly press /\ 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 to exit the configuration menu.

To turn off auto-reply, set the option to OFF in Step 4.

USING SUBAUDIBLE TONES

Some repeaters require you to transmit a subaudible tone to activate them.
You can set your HTX-212 to transmit any of the 38 standard subaudible 
tones.  You can also limit incoming reception by setting the HTX-212 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-212 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.  Hold F for at least 1 second. FUNC flashes.

2.  Press T-SQL. The HTX-212 displays "tC" and the currently set transmit
    tone.

3.  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."

4.  Press /\.  The HTX-212 displays "rC" and the currently set receive
    tone.

5.  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."

6.  Press T-SQL to save the settings.

Activating Subaudible Tone Transmit and Squelch

1.  Press T-SQL once. T appears.  The HTX-212 includes the selected
    transmit tone with your transmissions.

2.  Press T-SQL again.  T-SQL appears.  The HTX-212 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-212 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.  The alert
function automatically turns off after the three tones sound.


(CS 2/21/96)