HTX-245 Mini Handheld 2m/70cm FM Amateur Transceiver
(190-1106)                 Special Features           Faxback Doc. # 58623

Continuous Tone Coded Squelch System Features

Your transceiver can transmit and receive a low-level, selectable, sub
audible tone at the same time as it transmits (TX) or receives (RX) a 
regular signal.  This special tone lets you listen only to other radios 
set to the same tone frequency when you use the transceiver in simplex 
operation.  It also lets you match your radio to the subaudible tone 
frequency used by a local repeater.

Setting The CTCSS Tones

To set the TX and RX tones for the transceiver, follow these steps. 

1.  Press F + SET.

2.  Rotate CH until the current rt setting appears. 

3.  Press /\ or \/ to select a frequency or no frequency (CTCSS off) from
    the table below.  Your selection appears. 

4.  Rotate CH to set the CTCSS tone for the TX setting.  tt appears. 

5.  Press /\ or \/ to select a tone frequency from the table below.

6.  Press PTT to store all the settings.

Using The CTCSS Tones

You can use a transmit tone, a receive tone, or both.  For example, if the 
selected repeater does not transmit a CTCSS tone to be certain the squelch
automatically opens, enable the transmit tone but not the receive tone.

To enable only the transmit (TX) tone, press F + T. SQ.  T appears above 
the displayed frequency. 

To enable both the transmit and the receive (RX) tones, press F + T. SQ. 
again.  TSQ appears above the displayed frequency.

When you store a frequency in one of the 50 memory locations, all settings 
chosen for the selected frequency are stored as well.  Before you store a 
frequency (see "Storing a Transmit/Receive Frequency" in Faxback Doc. # 
58622), select the Subaudible Tone frequencies first.

Subaudible Tone Frequencies (Hz)

   67.0    118.8    183.5

   69.4    123.0    186.2

   71.9    127.3    189.9

   74.4    131.8    192.8 

   77.0    136.5    196.6

   79.7    141.3    199.5

   82.5    146.2    203.5 

   85.4    151.4    206.5 

   88.5    156.7    210.7

   91.5    159.8    218.1

   94.8    162.2    225.7  

   97.4    165.5    229.1

   100.0   167.9    233.6

   103.5   171.3    241.8

   107.2   173.8    250.3

   110.9   177.3    254.1
 
   114.8   179.9

Using DTMF Code

DTMF (Dual-Tone Multi Frequency) tones are those typically associated with 
the use of your telephone. Your transceiver can transmit up to 16 separate
DTMF tones and store a sequence of tones in up to 6 different memory
locations (d1 to d6).  You can use DTMF to transmit to a land-patch and
then to a telephone line. This lets you enable or disable certain repeater
functions which is handy if you are involved with repeater administration.
You can also signal to another radio equipped to receive DTMF codes.

Follow these steps to enter and store a DTMF sequence.

1.  Press VFO (BAND A).

2.  Press F+DTMF (M).  If no DTMF codes are stored in memory, --- -- d1 
    appears.  Hold down F while rotating CH to select a different DTMF 
    memory location.

3.  Enter up to 16 characters (0 through 9, and A through F; E=*, F=#).
    The radio sounds a beep for each entry, and two to indicate the 16th 
    character.  If you try to enter more than 16 characters, the radio 
    sounds two short beeps.  If you make an entry error, press F+CLR (6)
    and begin this step again.

4.  Press PTT to store the sequence in the selected memory location.  The
    transceiver returns to the VFO mode.

5.  To enter and store another DTMF sequence, repeat Steps 2-4.

Transmitting A DTMF Code

You can transmit a DTMF code from memory or using direct entry.

Transmitting a DTMF Code from Memory

1.  Press F+DTMF.  The last stored DTMF sequence appears.

2.  Hold down F and rotate CH until you see the desired DTMF code memory 
    location.  Then press PTT to exit the DTMF mode.

3.  Select a transmit frequency (see "Selecting Frequencies (Direct 
    Tuning) and Receiving Transmissions" in Faxback Doc. # 58622).

4.  Press PTT + M to transmit the selected DTMF code using the selected 
    frequency.

Transmitting a DTMF Code Using Direct Entry

1.  Hold down PTT (transmit).

2.  Enter each character of the desired DTMF code in order.  The DTMF tone
    sounds to confirm your entry.

Note: You can also hold down PTT and enter the first character of the DTMF
      sequence. Then, release PTT and continue to enter the balance of the
      DTMF code as long as you enter each character within 1-second of the
      proceeding character entry.

Using The transceiver with Packet Radio

You can connect your transceiver directly to a packet radio terminal node 
controller (TNC).  Refer to your TNC instructions for details.

Other Special Features

Locking The Keypad

To lock the transceiver's keypad so you do not accidentally change a 
setting, press F+ (KEY SYMBOL)(SC/C).  (KEY SYMBOL) appears.  This locks 
all buttons except PTT, PWR, F, and M.

To unlock the keypad, press F+ (KEY SYMBOL) again.

Lighting The Display

When you press any key except PTT or F, the backlight turns on for about 5 
seconds.  You can also use either /\ or \/ to turn on the backlight to 
avoid pressing any number keys.

Turning The Key Tone On And Off

The transceiver is preset to sound a beep each time you press a key.  To 
turn off the beep, press F + BEEP (8). bP oF briefly appears.  To have the 
beep sound again, press F + BEEP again.

Setting The Frequency Step

Follow these steps to change the frequency increment used during scanning 
and stepping to a frequency.

1.  Make sure the radio is in the VFO mode, then press F + STEP (7).  The 
    current step setting (in kHz) appears with St.

2.  Repeatedly press /\ or \/ until the desired new setting appears.  You 
    can change the frequency step to 5 kHz, 10 kHz, 12.5 kHz, 15 kHz, 25 
    kHz, or 50 kHz.

3.  Press PTT to store your selection. 

Power Save

The power save feature conserves battery power by turning off power to the 
receiver part of the radio and turning it on briefly every 8 seconds to 
check for a transmission.

To enable the power save feature, press F + PS (4).  S appears.

Notes:  When the radio receives no signal within an 8-second period, S 
        begins flashing indicating that the power save feature is active. 

        When the radio receives a signal during that 8-second period, S 
        remains steady.

        The green signal indicator lights to indicate that a signal has 
        been received and that power save is on stand-by.

        To use the transceiver for packet communications, disable the 
        power save feature (see "Using the Transceiver with Packet Radio" 
        above).

Using Auto Power-Shutoff

Follow these steps to have the transceiver automatically turn off after a 
preset period of non-use.

1.  Press F + APO (5).  Auto Power Shutoff is normally disabled.  OFF
    appears.

2.  Repeatedly press either /\ or \/ to select a time period until power
    shutoff.  You can select 30, 60, 90, or 120 minutes.

3.  Press PTT or VFO to store your selection and exit to the VFO mode.

To turn off the auto power-shutoff feature press F + APO again.

Limiting Transmit Duration (Time-Out Timer)

When you communicate using repeaters, keep your transmissions as brief as 
possible.  Most repeaters have built-in timers that limit single 
transmissions to 3 minutes or less.  You can set the transceiver to stop 
transmitting if you exceed a set time limit with a single transmission.

To set a value for the time-out timer, press F + TOT (9).  The default 
setting (OFF) appears.  Repeatedly press /\ or \/ to select the desired 
time-out-interval (up to 20 minutes).  When you select a value for the 
time out feature, TOT appears.  Press PTT to store the setting and exit to 
the VFO mode.

Tuning The Weather Radio Frequencies

The transceiver can receive 7 NOAA (National Oceanographic and Atmospheric 
Administration) weather broadcast frequencies.  To listen to the channel 
broadcasting in your location, press F + BAND to select the weather band.  
WX appears.  Then rotate CH or repeatedly press \/ or /\ to select your 
local weather channel from the following table.

  Channel Number       Frequency (MHz)

      CH-01                162.400

      CH-02                162.425

      CH-03                162.450

      CH-04                162.475

      CH-05                162.500

      CH-06                162.525

      CH-07                162.550

(BR EB 2/15/00)

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