25
Transmitting
Attention: Never transmit without having an antenna connected!
Before starting the transmission, listen to make sure that the channel is free and that there is no
doubling with a different radio station! Please note that the radio station needs a certain time
to carry out its start-up sequency: Thus, you should wait for a second before speaking.
For transmitting, you just have to press the
PTT
button (push-to talk button) on the left side of
your microphone and to speak with normal voice level into the microphone while holding the key
pressed. Dont speak too loud such that the sound of your voice is natural for your radio contact
partner. (Simply give it a try and ask for a modulation report afterwards.)
Squelch
Each radio set features a function for noise suppression (squelch) suppressing the reproduction,
if the signal is lacking or too weak. Use the
SQ
control to adjust the signal level at which the
function is activated. By turning the knob to the left, the signal level is reduced, by turning the
knob to the right, the signal level is increased. With constantly varying conditions of reception
(e.g. during mobile operation) a frequent adjustment of this level can be necessary.
ASC (Automatic Squelch Control)
The ASC function is a patented function elaborated by the President Electronics SA France group.
This function evaluates the so-called signal-to-noise ratio (ratio between the useful signal and
the interfering signal). The useful signal is only forwarded to the loudspeaker, if it is worth being
received, i.e. it is almost free from noise. Thus, a permanent readjustment, as for the squelch
function depending on the field strength, is not necessary. This is of benefit to a safe participation
in the street traffic when driving. The ASC function can be used for AM und FM mode. ASC is
activated by pressing the
ASC
key; in this case, the SQ control has no function.
Signal strength indication
On the right side of the channel or frequency indication, a bargraph is displayed which shows the
signal strength in S-grades when receiving. The S-grades 1, 3, 5, and 9 are indicated. Values
above S9 are indicated as S9+30. In this case, the received signals are very intensive and are
transmitted by an adjacent radio station.
Power display
When pressing the push-to-talk button on your microphone, the bar display shows the relative
transmitting power instead of the S-value.
Dual Watch
The dual watch function enables you to be ready-to-receive on two channels: The radio set
automatically changes from the current channel to an arbitrary second one and checks whether
a signal is present on this channel.
Switch to the first channel to be monitored and press the
DW
key:
DW
flashes on the display.
Switch over to the second channel to be monitored now and press the
DW
key again: DW stops
flashing on the display. If the squelch is adjusted correctly, the display switches between both
selected channels. If a signal is received on one of both channels, the dual watch function stops.
After having finished the call, dual watch is activated again.
Direct access to channel 9/19 (EMG)
By pressing the
EMG
key once, the radio set switches over to channel 9, by pressing the key
once again, channel 19 is activated (for this, the type of modulation is used which was activated
last for the corresponding channel). By pressing the
EMG
key for the third time, the radio set
returns to the initial channel.
Channel scanning/SCAN
For using the channel scan function ASC and TSQ must be switched off. Adjust the
SQ
control
such that the background noise just disappears. Activate channel scanning by pressing the
SCAN
key: Scanning will stop as soon as a signal which is worth being received is available on a channel.
