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16 Advanced operations
reception of a correct CTCSS/DCS signal, with CTCSS/DCS incor-
rect, etc.). For details about the BCLO operation please refer to the
paragraph 5.6.b
7.2 Handsfree transmission (VOX)
VOX (Voice Operated eXchange) is a device that allows you to automati-
cally switch the transmission in hands free mode just by speaking in the
built-in microphone of a headset (not provided with the unit) connected
to your transceiver. Once you have finished to talk, the VOX automatically
switches the radio on reception.
Ensure that the headset with microphone you are going to use is
suitable to your transceiver as stated in the paragraph 9.1
7.2.a Headset Connection
1) With a suitable screwdriver, unscrew the screw that holds the cover
cap of the accessory connector (item [7] of the paragraph 3.3)
2) Keep the cover cap in a safe place and connect the headset/micro-
phone to the accessory connector (for details about the contacts
layout please refer to the paragraph 9.1.a).
In order to avoid damages to the device, put the cover cap in its
place again when the accessory connector is not used.
7.2.b Enabling/disabling VOX
1) Ensure that the headset is properly connected and that the headset’s
built-in microphone is located close to the side of your mouth.
2) Switch on the radio on keeping pressed the FUNC button.
3) When the device is switched on, release the button.
7.2.c Adjusting VOX sensitivity
1) Enable the VOX as described above
2) Briefly press the FUNC button to select one of two VOX sensitivity
levels (high/low).
3) Perform some tests in order to ensure a stable transmission when
speaking with a normal voice level, but avoiding accidental transmis-
sions.
We recommend to set just the minimum sensitivity as possible.
A too high value could cause accidental transmissions, espe-
cially in hi-noise environments.
The transceiver isn’t provided with any indication of LOW/HIGH VOX
sensitivity
PTT button is disabled during VOX operation.
7.3 Confidential Communications (scrambler)
Your transceiver could have been programmed to use the scrambler
when necessary. This is a device that make your communications unin-
telligible to normal receivers/transceivers, but perfectly clear to the other
radios of your network, that obviously must belong to the HPx06 family
(i.e. equipped of the same type of scrambler).
To enable the scrambler:
1) Ensure that the other party enables his/her scrambler too.
2) Simultaneously and briefly press the MON and FUNC buttons. The
device will send a high-pitched beep to confirm that the scrambler is
enabled.
To disable the scrambler:
English
ISTR106_int 26-09-2003 9:47 Pagina 16
44


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