Zartek ZA-720, User Manual, Page: 11 / 15

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OPTIONAL FEATURES
Battery Save Function
The Battery Save function decreases the amount of power used when a
signal is not being received and no operations are being performed (no keys
are being pressed, and no switches are being turned). While the channel is
not busy and no operation is performed for 10 seconds, Battery Save turns
ON. When a signal is received or an operation is performed, Battery Save
turns OFF.
y
Factory programmed on Save ON.
Squelch
The squelch level is used to adjust the threshold at which signals will open
the audio channel. A low level will allow weaker signals to be audible, al-
though with more background noise. However, if weak signals are annoying,
the level can be adjusted higher to open the channel only when stronger
signals are received.
You can set up the squelch level from 0 to 9. The higher the squelch level,
the less noisy is the signal as only stronger signal are accepted. The lower
the squelch level the noisier the signal is, as weak signals are also allowed.
As the communication range or obstructions between radios increase, the
weaker the signal becomes. It is advised to use a lower squelch level to get
further communication range.
y
Factory programmed on Squelch level 3.
Time-out Timer
The purpose of the Time-out Timer is to prevent any person jamming up a
channel for a long time whilst transmitting. If the time that you continuously
transmit exceeds the set Time-out time, the transceiver will stop transmitting
and a tone “beep” will sound. To stop the tone, release the PTT switch. You
can press the PTT switch again to resume transmitting.
NOTE: you can set up the time level: 15s, 30s, 60s, 90s …… 600s.
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Factory programmed on TOT 300s.
VOX (Voice-operated Transmission)
The ZA-720 has a multi-level sensitivity built-in VOX function. You can enjoy
talking and listening without pressing PTT key as transmit is automatically
activated by sound. This turns your radio into hands-free “walk & talk” when
used with a headset. Voice activation is used to operate the radio in hands-
free mode or as a noise / baby monitor. The radio will begin transmitting
when a noise or voice is heard. There are many headset options (see op-
tional accessories below) which can be used in VOX mode allowing for full
hands-free communication.
NOTE
:
That VOX can be activated in software and manually.
Manual VOX ON/OFF: First set the channel from CH 1 – 5, then switch off
the radio. Now Hold in the PTT & Monitor Buttons together and switch radio
On whilst holding them in and then release. The radio will announce VOX
ON. Repeat the process to toggle VOX OFF.
VOX level
The sensitivity level of the microphone can be adjusted to allow different
volumes of sounds to make the radio begin and remain transmitting. There
are 1 - 5 levels with 1 being the highest and most sensitive to lower volumes
of sound. If the radio is used in a very noisy environment it is recommended
to use a low sensitivity level to avoid the radio transmitting unnecessarily. At
low sensitivity level it will be required to speak loudly into the microphone to
activate the radio. At high sensitivity, a soft voice is all that is required which
enable the radio to be placed at a further distance from the noise source
(typically 30cm max).
Scan
A scan function is useful when you want to find other people on similar
frequencies or to monitor communication within your group. If an active
channel is found the scan will stop and lock on to that channel. You can now
transmit and receive on this frequency. When the signal is gone for 5 sec-
onds, scanning will resume. LED flashes when scanning.
There are 2 ways to setup scanning:
1) Via Programming Software:
Program CH 16 to be blank with no data.
Select CH 16 to scan. The radio will begin scanning all the selected chan-