HP105/HP405 User manual
Page. 13
Transmission Power
Your HP105/HP405 can transmit with two power levels according to the distance of your party station(s).
This option is programmed via PC and it can not modified by the user. We do recommend, when possible,
to use the Low power: it will increase the battery duty and will reduce the risk to make interference with
stations not owning to your radio network which may sharing the same channel with you.
!
If the low battery mark is "blinking" (Low Battery indication), the Unit will then automatically revert
to Low RF Power when transmitting in order to help prolong the Battery's operational life. In this
case, two short beeps will be heard before transmission.
Scanning channels
If you have more than one channel programmed, your HP105/HP405 can scan them: in other words it can
cycle through them and stop when a signal is detected.
The advanced scan functions of the radio allow to optionally look for carrier or carrier with CTCSS/DCS or
CTCSS.
1) To activate the scan Switch Off and then Switch ON the radio holding MON and FUNC buttons.
2) A long beep will be heard when enter the SCAN MODE.
3) During scanning the LED will blink amber.
4) Only the channel in the Scan List will be monitored for activity. The Scan List is programmed via PC.
5) During scanning the channel selector knob becomes invalid.
6) To stop channel scan Switch Off and then Switch ON the radio holding MON and FUNC buttons.
7) One among the programmed channels can be assigned as Priority Channel. The scanning will look
back at the priority channel with high frequency.
8) User can select the priority channel:
9) To select Priority channel, before starting the Scan Mode (before switching On the radio) select the
channel using the selector knob.
!
NOTE
: If the Scan List has no channels, a low tone (error beep) will be heard when you switch
On the radio holding MON +FUNC and radio will not start the Scan Mode. At least two channels
must be in the Scan List for the Unit to be put in the SCAN Mode.
!
When a proper signal is received on a channel, the radio will stop scanning and audio will
become audible. When the activity on that channel ceases, the unit will automatically resume
scanning.
!
If CTCSS/DCS have been previously programmed, the scanning will stop only if the received
carrier has the appropriate signalling.
!
If PTT is pressed during scanning, the radio will transmit on the first vacant channel. In case of no
activity, the Unit will automatically resume scanning.
Advanced Operations
In this section we’ll describe some advanced operation which you can do with your handheld transceiver:
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