5. Occupied channel search ( SCAN ) [ SC ] :
Before selecting the SCAN function set the squelch control
( 1 ) [ SQUELCH ]
according to Para
2
of this chapter because this function does not work with un-
muted receiver. Depress the key
( 12 ) [ SC ]
now. In the display appears
[ SC ]
and the channels are stepping upwards. SCAN stops on the first occupied chan-
nel, where a signal can trigger the squelch threshold. It continues 10 seconds af-
ter the signal falls below the squelch threshold.
Depressing the key
( 12 ) [ SC ]
again or any other, except
( 15 ) [ FRQ ]
, will
stop the SCAN function.
6. Dual Watch [ DW ] :
This function allows to watch activity on a second channel. Before selecting the
DW function set the squelch control
( 1 ) [ SQUELCH ]
according to Para
2
. Se-
lect now the first channel which you want to survey and then depress briefly the
button
( 14 ) [ DW ]
. In the display appears a flashing
[ DW ]
sign.
Start within 5
seconds selecting the second channel which you want to survey otherwise the
DW function will stop automatically. After having reached the desired channel
press the button
( 14 ) [ DW ]
another time and the symbol
[ DW ]
will appear
permanently. Now the DW function is completely activated.
The DW function will remain on this channel if the incoming signal can open the
squelch and is not longer interrupted than 10 seconds. Otherwise the unit will
tune to the other channel. If no signal is found there the radio will step every
second to the other channel.
Depressing the key
( 14 ) [ DW ]
again or any other, except
( 15 ) [ FRQ ]
, will
stop the DW function.
7. Transmit ( Push To Talk / PTT ) :
To transmit depress and hold the PTT key on the microphone. In the display ap-
pears
[ TX ]
and together with the symbol
[ SRF ]
= (
S
ignal
R
adio
F
requency )
the relative output power will be shown in form of a progressively increasing
number of bar sections. The microphone sensitivity has been set to give good
results speaking normally at a distance of 2 - 4 inches. Speaking too loudly will
cause distortion and make the signal difficult to understand especially in case of
amplifier or echo microphones. While the set is in the transmitting mode there is
no key entry possible and the receiver is muted. On completion of the transmis-
sion release the PTT key and the set will revert to receiving mode.
8. S-meter [ EXT S-METER ] :
Behind the letters
[ SRF ]
the relative transmit power and received fieldstrength
will be displayed in the window
( 3 )
, forming progressive bar sections. The
TEAM SelCom 4040
has on its rear panel a socket
( 20 ) EXT S-METER
for the
connection of an additional S-meter with a 2.5 mm plug.
- 15 -