Spectra Precision ADLCONF User Guide - Manual (Page 21)

21 ADLCONF User Guide
Disable TX
Select this check box to disable the transmitter when you need to conduct certain tests of
a radio system where you need to ensure that the radio will not transmit. If you select this
check box, remember to clear it or the radio will not transmit data.
Scramble Control
To demodulate a digital transmission, a receiver must synchronize itself with the
transmitter. This can be hard to do when the transmitter sends a long series of one’s or a
long series of zeroes. But if every nth characters in the transmission were switched, a one
to a zero or a zero to a one, and if the receiver was expecting this, it could more easily and
quickly synchronize itself with the transmission. This is essentially what Scramble Control
does and why we recommend you leave it on for all radios.
If you select a protocol type other than Transparent (EOT and EOC) or Packet Switched,
Scrambling Control is automatically disabled although the check box remains selected.
However, if some of the radios in your system are non-Pacific Crest radios, you may need
to turn Scramble Control off.
Note – Trimble protocols require Scramble Control. With a Trimble protocol selected, you are
unable to turn off Scramble Control.
Automatic turn off
The radio turns off automatically when the input voltage reaches a user-specified level.
The default is 9 volts.
You can also select a low voltage warning offset. This is the number of volts above the
automatic turn off level at which the radio interface, if it has one, warns you that the radio
battery charge is low. With a radio shut off value of 9 V and a low voltage warning offset
of 1 V, the radio warns you when the battery reaches 10 V. The radio turns off when the
battery reaches 9 V.
If you are configuring an ADL Vantage Pro radio, the Automatic turn off feature is on
and grayed out. Because of the higher transmit power of the ADL Vantage Pro radio, the
battery can be damaged by overdischarge. To prevent this, the radio always warns you of a
low battery condition at 11 V and shuts off when the battery discharges to 10 V.
RX LED definition
If you have a radio with an Rx LED, you can switch the meanings of the LED to one of the
following:
• Signal received (RF energy above squelch level is detected) – the default
• Data packets received