23
OPERATION
On/Off [ VOL ]
To power-on the radio, push the rotary volume control shortly. To turn off
the radio, push the rotary volume control for approximately 2 seconds.
Squelch [ SQ ]
The threshold of the squelch function can be set at the radio or via soft-
ware on a scale between 1-9. The higher the value, the stronger the si-
gnal has to be in order to open the squelch filter.
For changing the squelch level at the radio, please see the paragraph
Function Menu.
To deactivate the squelch, please use the
SQL
key (4). As long as you
press the key, the squelch is deactivated. Via software this key can be
programmed to a) turn off/on the function by pressing the key or b) to
temporarily deactivate the squelch as long as the key is pushed.
Channel selection
[
UP
] [
DN
]
User the channel selector keys [
UP
] and [
DN
] at the microphone for
channel selection. Depending on the setup, the channel number or
the frequency or the channel name is displayed.
Scan [SCA]
To start/stop the scan function, press the scan key [
SCA
] (3). When ac-
tivated, all channels that are enabled for scanning will be searched for
signals until a signal has been detected. Then, the scan function pauses
until the signal ends. Scanning continues after the pause. A blinking dot
in the display indicates the active scan status.
If the PTT key is pushed during scan, the radio will switch to the last
channel where a signal has been received. If no signal has been found
during scanning, the radio will switch back to the starting channel.
With the optional software T-UP37, the scan settings can be changed.
Transmit
For signal transmission, press and hold the PTT key at the microphone.
The signal strength is at the tx s-meter (7). After completion, release
the PTT key and the radio will automatically return to reception mode.
All function keys are blocked during signal transmission.
22
Attention: the radio contains a tx-blockage function, which can be set
in the Function Menu (#06 TX).
Reception
The signal strength of the received signal is indicated at the rx s-meter (6).
Depending on the squelch setting and/or CTCSS/DCS, it could be that
the signal is not audible through the speaker. Please check the ac-
cording settings if necessary.
Key lock [key symbol]
In active mode, the key lock function will block all function keys, ex-
cept for the PTT key. To activate/deactivate the key lock function,
press the FUN key (1) first (the letter F will appear in the display) and
then push the rotary volume control. The key symbol in the display
will indicate the active state of the function.
CTCSS/DCS
There are 51 CTCSS codes and 777 DCS codes (N (normal) and
I
(inverse)) available. The available codes can be individually assigned
to the different channels.
For the DCS codes, at the radio you can only set the N-codes, The I-
codes can only be programmed via the software.
Each channel can be encoded individually. By software, tx and rx fre-
quencies can be set differently. At the radio, the following settings are
available. Differing programming by software are not displayed at the
radio.
T
: CTCSS codes only for tx-frequency
CT
: CTCSS codes only for rx- and tx-frequency
DCS
: DCS
To change or set a CTCSS or DCS code, press the function key FUN
(1) followed by the squelch key SQL (4). By repeatedly pressing the
squelch SQL key (4), the radio switches through the modes
T
,
CT
and
DCS
. If no symbol appears in the display, no mode is activated.
Once the mode is selected, turn the rotary volume control (5) to select
a code. The selection is stored automatically or by pressing the FUN
key (1).
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