14) Channel scanning [Scan]
If this function is active, the unit looks for occupied channels. As this function does not work with
open squelch, set the squelch control (8) [
SQ/Asq
] according to para
2
before activating the scan
function.
Depress the key (15) [
Scan
] briefly to start the channel scan. Now the channels are stepping
upwards and the scan symbol
SC
appears on the LCD screen. The scan function stops on
the next channel on which a signal opens the squelch. It is terminated at this moment, which
is indicated by the extinction of the scan symbol
SC
.
For a premature deactivation of the scan function, depress the key (15) [
Scan
] once again,
any other key on the front panel, except the VOX function On/Off switch (13), or press the
Up/Down keys (2, 3) or the PTT key (4) on the microphone, or just turn at the rotary channel
switch (9) [
Channel
]. Then the scan symbol
SC
will disappear from the display, and the actu-
al channel will be that one, on which the channel number was just standing at the moment of
deactivation of the scan function.
15) Dual watch function [Dual Watch / ]
This function allows you to watch activity on two channels at a time. Before activating this
function make sure that the squelch is closed on free channels.
First select the first survey channel by means of the rotary channel switch (9) [
Channel
] or
the Up/Down keys (2) [
q
] and (3) [
p
] on the microphone and its modulation. Then depress
briefly the key (19) [
Dual Watch /
] so that the dual watch symbol
DW
flashes in the LCD
window. Now select the second survey channel by means of the rotary channel (9) switch or
the Up/Down keys (2) and (3) on the microphone and its modulation. Then depress briefly the
key (19) [
Dual Watch /
] once again so that the dual watch symbol
DW
appears constant-
ly, which means that means that the dual watch function is finally activated now. Make sure
that the second pressure on the dual watch key occurs within 23 seconds after the first one,
otherwise the DW function will be aborted, which will be indicated by the extinction of the flas-
hing dual watch symbol
DW
in the display.
If on none of both survey cannels is received any signal, the unit will step from one channel
to the other two times every second. If on one of these channels is received a signal, which
opens the squelch, the unit will remain on it until the channel is free again. 7 seconds later
the unit will continue stepping from one channel to the other like before.
If you press briefly the key ( 19 ) [
Dual Watch /
] another time, the dual watch symbol
"
DW
" will flash again in the LCD window. Now you can select another second survey chan-
nel by means of the rotary channel switch ( 9 ) or the Up/Down keys ( 2 ) and ( 3 ) on the
microphone and its modulation. That channel, on which the unit was, while the dual watch key
was pressed, is the first survey channel now.
To deactivate the dual watch function and to stay on the actual channel, depress twice briefly the
dual watch key (19), any other key on the front panel, except the VOX function On/Off switch (13)
or press the Up/Down keys (2) and (3), or just turn at the rotary channel switch (9). Transmitting
is possible on the actual channel but it does not terminate the dual watch function.
As a token of the deactivation of the DW function the dual watch symbol
DW
will disappear
from the display.
16) Key lock function [ ]
If you press the dual watch or key lock key (19) [
Dual Watch /
] and hold it for a short peri-
od, you will hear 2 seconds, after starting to press, a second short receipt tone which announ-
ces that the key lock function is active. The key lock function is also indicated with a key sym-
bol
in the LCD window. Now the unit ignores any entry from any key on the front panel,
except the VOX function On/Off switch (13), and also the Up/Down keys (2) and
English
English
(3) and the rotary channel selector (9). Thus it is also impossible to stop most activated func-
tions. Only transmission is possible. The function remains even active if the unit is switched
off in the meantime, provided that the supply voltage remains connected.
To deactivate the key lock function depress the key (19) [
Dual Watch /
] once again and
hold it for a short period, until you will hear 2 seconds later a second short receipt tone which
indicates that the key lock function is deactivated now. At the same time the key symbol -
disappears from the display. Now the keys are released again.
17) VOX function
The VOX function is a voice activated control of the transmitter. That means talking into the
microphone will make the transceiver turn automatically to transmit mode. Thus keeping the
PTT key on the microphone depressed during sending out a message becomes unnecessa-
ry. To prevent an unwanted transmission the VOX circuit in the RoadCom-FS is coupled with
the squelch circuit of the receiver. This has the effect, that the voice activated switching on of
the transmitter by sound signals from the microphone can only take place, when the squelch
is closed at the same time. Therefore make sure that the squelch is closed on free channels
before you activate the VOX function. For best results use auto squelch.
To activate the VOX function depress the button of the VOX function On/Off switch (13) on
the left side of the front panel until it latches. If now the actual channel is free and the squelch
is closed, the red standby LED of the VOX function (14) [VOX] lights up. This indicates that
the unit is ready for radio operation with the VOX function now.
If you speak loud enough into the microphone, the unit will switch itself automatically to transmit
mode, which will be indicated by the symbol
TX
on the LCD. The LED (14) [
VOX
] remains alight
also in transmit mode. During your message it may occur, that the actual loudness of your voice
falls below the volume level, which is necessary for the VOX function to make the unit switch to
transmit mode. If the duration of those periods of low speech level remains below a certain time,
which is called the VOX delay time, the unit will stay in transmit mode. If the duration of those
periods exceeds the VOX delay time, the unit returns to the receive mode. In this moment the
LED (14) [
VOX
] switches itself briefly off and on again.
If the squelch is open for some reasons, the LED (14) [
VOX
] will be dark, even with activated
VOX function. One reason for an open squelch could be that there is a station on the channel,
for example the partner station. Another reason could be that the noise level has increased so
that the squelch remains open also on a free channel. In this case the unit will not switch itself to
transmit mode by talking into the microphone, no matter how loud you speak.
The unit can be switched to transmit mode by the help of the transmit key on the micropho-
ne at every time, also with active VOX function.
To deactivate the VOX function depress the button of the VOX function On/Off switch ( 13 )
until it is released.
18) External speaker jack
The RoadCom-FS is equipped with a 3.5 mm jack socket (23) at the rear panel to connect an
external speaker of 4-8 ohm impedance. At 4 ohms the speaker load can be 4 watts (e.g. TEAM
TS-500). When the external speaker is connected, the internal speaker will be switched off.
19) Signal meter internal/external
The bar meter in the LCD window shows in reception mode the signal strength of a received sig-
nal (S value), and in transmit mode the signal strength of the transmit signal. There is also a 2.5
mm jack socket (24) at the rear panel of the RoadCom-FS to connect an external S-meter with
a 2.5 mm plug (e. g. TEAM SM 930). It can show the S values more exactly. Please note that the
external S-meter shows only the relative field strength of the incoming signal.
20
21
roadcom-FS-FMN_manual_09052012_V1_mod:RoadCOM manual.qxd 24.05.2012 13:18 Seite 20
