Kenwood TM-451A - Manual (Page 60)

European Versions
To send 1750 Hz, "1750" must first be selected from
the Tone frequency list by using the "Selecting a
Tone Frequency" {page 52} procedure.
A 1750 Hz Tone is then transmitted by pressing
[TONE/CTCSS] or microphone [PF]. If you prefer,
this function can be assigned to other microphone
keys. See "Configuring the PF Keys" (page 70}.
Also, if CTCSS is ON, 1750 Hz cannot be selected
{page 74}.
Transmit Hold for sending the 1750 Hz repeater
access tone can be enabled via Menu B.
1 Press [REV] + POWER ON to enter Menu B.
2 Select Menu No. 54 {page 24}.
• The current 1750 Hz Hold status appears.
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3 Select a status.
• OFF: 1750 Hz sent only as long as
[TONE/CTCSS] is pressed.
• ON : 1750 Hz sent for 2 seconds continuously.
• Default: OFF
4 Exit Menu B.
Note: If the Tone function is assigned to microphone [PF], then
[PF] functions the same as [TONE/CTCSS].
AUTOPATCH (U.S.A. and Canada Versions)
Some repeaters offer a service called Autopatch. This
feature allows you to dial a telephone number from your
transceiver and carry on a telephone conversation. This
repeater function cannot be used for commercial
transactions, but it can save lives when used
appropriately during emergencies.
Autopatch requires the use of a DTMF (Dual Tone Multi-
Frequency) keypad on your microphone. The keypad
includes the 12 keys found on a push-button telephone
plus an additional 4 keys (A, B, C, D). These additional
keys are required for various control operations by some
repeater systems.
■ Activating the Microphone Keypad
1 Press and hold [PTT].
2 Press the numeric keys on the keypad in sequence
to send DTMF tones.
DTMF Tones
Freq
(Hz)
1209 1336 1477 1633
697 1 2 3 A
770 4 5 6 В
852 7 8 9 C
941 * 0 # D
Note: Some repeaters require a special key sequence to activate
Autopatch. Check with the control operator.
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