TM9100 Service Manual TMAA02-08 Keypad Microphone 431
© Tait Electronics Limited August 2005
16 TMAA02-08 Keypad Microphone
The TMAA02-08 keypad microphone plugs into the
microphone socket on the graphical-display radio control
head, and enables users to make calls to other radios, groups,
or to a PABX or PSTN. The types of call that you can make
depends on the way your radio has been programmed.
As well as the PTT key, there are twelve alphanumeric keys, two
scroll keys, and a left and right selection key on the keypad
microphone. The selection keys and scroll keys duplicate the
keys on the control head.
The microphone button operates a hookswitch, which is closed
when the microphone is connected to the microphone clip, and
open when the microphone is removed from the microphone
clip. The function of the hookswitch is determined by the
radio programming.
16.1 Operation
16.1.1 Using the Keypad
The 12 alphanumeric keys on the keypad microphone are used to dial call
strings and enter text.
The left selection
key , right selection key and scroll keys or have
the same functions as the left and right selection keys and scroll keys on the
control head.
Pressing an alphanumeric key enters the first character on the key into the
control head display. Subsequent quick presses toggle through the other
characters on the key. Pausing for longer than one second moves the cursor
on to the next place in the dialled string or text message on the control head
display, ready for the next key press.
If the wrong number or character has been selected, use the left selection key on
either the microphone keypad or control head to clear it and move back one.
16.1.2 Using the PTT Key
The PTT key is used for voice transmission.
1. Select the required channel or group.
2. Check that the channel is clear. If the green LED is glowing, the
channel is busy and you may not be able to transmit.
PTT key
scroll keys
grommet
right selection keyleft selection key
alphanumeric
keys
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