Kenwood TH-D72A User manual

DUAL TONE MULTI-FREQUENCY (DTMF)
The keys on the keypad function as DTMF keys; the 12 keys found on a push-button telephone plus 4 additional keys (A,
B, C, D). This transceiver provides 10 dedicated memory channels. You can store a DTMF code with up to 16 digits.
Some repeaters in the U.S.A. and Canada offer a service called Autopatch. You can access the public telephone network
via such a repeater by sending DTMF tones. For further information, consult your local repeater reference.
MANUAL DIALING
Manual Dialing requires only two steps to send DTMF
tones.
1Press and hold [PTT].
2Press the keys in sequence on the keypad to send
DTMF tones.
• The corresponding DTMF tones are transmitted.
• If the DTMF Hold function is activated, you not need hold
down [PTT] while pressing keys. After transmitting the
first tone (by pressing [PTT] and the first key), pressing
additional keys will keep the transceiver in transmit mode
for 2 seconds.
Frequency (Hz) 1209 1336 1447 1633
697 [1] [2] [3] [A]
770 [4] [5] [6] [B]
852 [7] [8] [9] [C]
941 [] [0] [#] [D]
■DTMF Hold
Activate this function to remain in transmit mode, after
beginning to press keys when making a call.
1Enter Menu mode and access Menu 173.
2Set DTMF Hold to “On” to continue transmitting
when pressing keys.
• Set this menu to “Off” to stop the 2 second continuous
transmission.
AUTOMATIC DIALER
There are 10 dedicated DTMF Memory channels available
to store DTMF codes. You can store up to 16 digits in
each channel.
■Storing a DTMF Code in Memory
1Enter Menu mode and access Menu 170.
2Press [ (OK)]
3Press [ ]/[ ] or rotate the Tuning control to select
a channel number.
4Press [ OK] or [MENU] to set the selected
channel number.
• The name entry display appears.
5Enter a name for the channel, the press [ OK] or
[MENU] to set it.
• The code entry display appears.
6Enter a DTMF code for the channel, then press [
OK] or [MENU] to set it.
• When a space is entered, it becomes a “Pause” code.
DTMF – 1

DTMF – 2
■Transmitting Stored DTMF Codes
1Press and hold [PTT].
2While transmitting, press [MENU].
• The last called DTMF Memory channel number and
name appears on the display. If no name has been
saved for the channel, the DTMF code appears.
3While still transmitting, press [ ]/[ ]or rotate
the Tuning control to select your desired DTMF
Memory channel, then press [ OK] or [MENU] to
transmit DTMF code.
• Additionally, you can press a DTMF key
corresponding to your desired channel ([0] ~ [9]) to
select the channel and begin transmission.
• The stored DTMF code scrolls across the display and
is transmitted.
• The code will be transmitted even if you release [PTT]
before the entire code has scrolled across the display.
• If no DTMF code is stored in the selected channel, the
frequency display is restored.
■Selecting a Transmit Speed
Some repeaters may not respond correctly if a DTMF
code is transmitted at fast speed. If this happens,
change the DTMF code transmission speed; the
default is 100 msec.
1Enter Menu mode and access Menu 171.
2Select a speed (in msec) from the available list: 50/
100/ 150.
■Selecting a Pause Duration
You can change the pause duration stored in DTMF
Memory channels; the default is 500 msec.
1Enter Menu mode and access Menu 172.
2Select a pause duration (in msec) from the available
list: 100/ 250/ 500/ 750/ 1000/ 1500/ 2000.
DTMF KEY LOCK
This function will lock the DTMF transmission keys so that
they will not transmit if they are accidentally pressed while
transmitting. To lock the DTMF keys, turn this function
On.
1Enter Menu mode and access Menu 181.
2Set the key lock to “On” or “Off”.