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Basic Operation of the Transceiver
Important! - Before turning on the radio the first time, confirm that the power connec-
tions have been made correctly and that a proper antenna is connected to the antenna jack.
Switching Power ON/OFF
Push the POWER switch turn on the radio. The display will become illuminated.
The radio will start up on the last channel used prior to shut-down during the previ-
ous operating session.
The display should show either a channel number or scan mode indicator (DSC,
USC, GDS, GUS, PDS, PUS, DDW or UDW). If "ERR" is displayed instead, the
transceiver has not yet been programmed with channel frequencies; switch off the
power and contact your network administrator or VERTEX STANDARD dealer. If
a scan mode indicator is displayed, you can press the SCAN button to display a
channel number, and then press either the UP (p) or DOWN (q) button to change
channels.
Setting the Volume
Turn the VOL knob clockwise to increase the volume, and counterclockwise to de-
crease it.
Transmitting
To transmit, wait until the "BUSY" indicator is off (the channel is not in use), and
press the PTT (Push-To-Talk) switch on the side of the microphone (the "TX" indi-
cator will appear or the "TX" indicator will glow red). While holding in the PTT
switch, speak across the face of the microphone in a clear, normal voice level, and
then release the PTT switch to receive.
Automatic Time-Out Timer
If the selected channel has been programmed for automatic time-out, you must limit
the length of each transmission. While transmitting, a beep will sound five seconds
before time-out. Another beep will sound just before the deadline; the "TX" indica-
tor will disappear and transmission will cease soon thereafter. To resume transmit-
ting, you must release the PTT and wait for the "penalty timer" to expire (if you press
the PTT before this timer expires, the timer restarts, and you will have to wait an-
other "penalty" period).
Selecting Groups and Channels
m Press the UP (p) or DOWN (q) button (repeatedly, if necessary) to select a dif-
ferent group of channels.
m Turn the CHANNEL selector knob to select a different channel within the current
group.
VX-4000 Operating Manual
Page 5
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