Northern Airborne Technology NPX136D - Manual (Page 36)

NPX136D Series Panel Mount P25 VHF Transceiver
SM68 Installation and Operation Manual
Section 3 Rev: 1.00 Issue 4 Page 3-10
ENG-FORM: 806-0114.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
3.6 Settings Menu
The settings menu allows changing of general NPX136D settings.
3.6.1 Brightness
DsplBrt LtOff:01-20
DsplBrt Lt On:01-20
The display is dimmable in 20 steps. Two settings for the display brightness are stored in non-volatile
memory: one level for when panel lights are off and one for when panel lights are on. Both of these
settings are changed from the brightness settings menu. To switch between levels turn the panel lights on
or off.
Note
: In a well-lit area, such as daylight in an aircraft cockpit, brightness settings below 10 may be
difficult to read. If the display cannot be read properly, follow these instructions for a 'short-cut' to
changing the brightness:
1. Turn the NPX136D radio off and then back on.
2. Wait for 12 seconds, or until the HELP screen is displayed.
3. Press the Esc button three times.
4. Press the Menu button and then the Enter button.
5. The NPX136D should be in the brightness field of the Settings Menu.
6. Press the up or down arrow until the display can be read.
7. If this does not work, repeat starting at step 1.
3.6.2 Transmit Power
Tx Pwr:Lo, Hi, Per Chan
The transmit power level for all channels can be changed from Lo (1 Watt) or Hi (10 Watts) or may be set
to Per Chan where the power setting from the channel is used to control the transmit power level.
3.6.3 Transmit Mode
Tx Mode:Simplex, Duplex
There are two modes possible: DUPLEX (repeater) operation, and SIMPLEX (direct) operation. Duplex
means that the NPX136D uses both the RX and TX frequencies programmed into the selected channel.
When in duplex mode the display shows both the receive (preceded by the text
R: ) and transmit (preceded
by the text T: ) frequencies and squelch mode. Simplex means that the NPX136D uses the RX frequency
and tone or digital squelch programmed into the selected channel for both RX and TX purposes. When in
simplex mode the display shows the text
S: and the channel frequency and squelch mode.
3.6.4 Squelch Mode, Analog Tones
Anlg Tone: On, Off, TxOnly
For analog channels, CTCSS and DCS tones are selectable to on, off or transmit only.