you hear a noise in the speaker. To reactivate the squelch press
the monitor key M ( 10 ) again. If there is no station on the actual
channel, the symbol ( = BUSY ) disappears from the display.
5) Voice transmission
Radio contact is only possible with stations that work on the same
channel. Before transmitting, listen whether the actual channel is
free. Do not send signals on occupied channels. To transmit
depress and hold the PTT key ( 12 ). During transmission, the TX
control lamp ( 15 ) is red and all keys are disabled, except for the
ON/OFF key. The sensitivity of the built-in microphone ( 9 ) is set
for speaking at a distance of 2 - 3 inches. Speaking too loud will
cause distortions and makes the signal difficult to understand. On
completion of the transmission release the PTT key and the set
will return to receive mode.
6) Call tone transmission
By pressing the call tone key C ( 5 ), you can transmit a call sig-
nal. The call signal will be transmitted for three seconds and is
also audible in the internal speaker ( 7 ). All stations in the neigh-
bourhood that are on the same channel will hear it. Once the call
tone is finished, the unit will switch back to receive mode.
7) LCD window illumination
By pressing the enter key ( 6 ), the backlight of the LC display
is turned on for four seconds. The LCD backlight will also be
switched on if the menu key
( 11 ) is pressed.
8) Key lock function
The key lock function disables all keys except for the PTT key, the
call tone key and the ON/OFF key. To enable the key lock func-
tion, depress the enter key ( 6 ) for 2 seconds until the key lock
symbol appears in the display to the right of the the channel num-
ber, accompaned by a confirmation tone. To deactivate the key lock,
English
depress the enter key ( 6 ) again for 2 seconds until the key-
lock symbol disappears.
9) Channel selection
The TeCom-508 has 8 channels. The following instructions show
how to select a channel:
Depress the menu key
( 11 ) one time, until the number of the
actual channel flashes in the LCD window. The channel selection
must be done as long as the channel number is still flashing, oth-
erwise the unit returns to the normal mode without changing the
channel. Press the up key
▲
( 3 ) to increase the channel num-
ber by one, and press the down key
▼
( 4 ) to decrease the chan-
nel number by one. Pressing the keys for one second will make
the channel number change quickly. The pitch of the confirmation
tones depends on the current channel number. The channels step
in a ring like system. To terminate the channel selection and to
return to the normal receiving mode, press the enter key ( 6 ).
No channel selection is possible in key lock mode.
10) CTCSS
CTCSS stands for continuous tone coded squelch system and is
used to suppress unwanted signals on the actual channel. With
CTCSS a tone in the frequency range of 67 – 250 Hz with a low
level is added to the signal. With CTCSS, all sent signals contain
a CTCSS code and all incoming signals will be filtered for this set
CTCSS code, i.e. only signals with the selected CTCSS code will
be received.
TeCom-508 has 38 different CTCSS codes available. When using
the code number 0, the CTCSS function is disabled. With TeCom-
508 it is possible to set for each channel individual CTCSS codes.
To activate the CTCSS function press the menu key
( 11 )
twice. The CTCSS number in the upper right corner of the display
will start blinking. To set the CTCSS code use the up- and down
keys ( 3 & 4 ). To confirm your selection press :
English
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