KVH Industries TracVision R4 - Manual (Page 45)

Sleep Mode (TracVision R5 only)
When the vehicle has come to a stop and the antenna holds its
position for 1 minute, the antenna unit enters Sleep Mode, which
turns off the conical scan tracking, reducing any motor noise the
antenna may be making. As soon as the vehicle moves, Sleep
Mode will automatically be turned off and the system will begin
tracking the satellite again. This convenient feature is ideal for
when a vehicle is parked for a short time or idling and
passengers want to watch TV.
KVH recognizes that some customers may not want to take
advantage of this convenient feature. In this case, it is possible to
disable Sleep Mode using a simple software command as follows:
1. Connect a laptop computer to the system using the
maintenance port and use the KVH Flash Update
Wizard or HyperTerminal, as described in Section
2.5.1, “Installing Your Selected Satellites.”
2. Turn on the antenna. When the limit switch test is
complete:
a. Type HALT and press Enter.
b. Type DEBUGON and press Enter.
c. Type SLEEPOFF and press Enter.
3. Turn the antenna off by pressing its power button.
4. Wait 30 seconds and press the antenna’s power
button to turn the antenna back on. Sleep Mode is
now disabled. To reactivate Sleep Mode, follow this
same process, typing SLEEPON instead of
SLEEPOFF during Step c.
Conical Scan Tracking (TracVision R5 only)
The antenna control unit uses conical scanning to maintain peak
signal strength to the receiver and to update the satellite’s
position. When conical scan tracking is active, the antenna moves
continually with a circular motion to sweep across the satellite’s
peak signal. The signal strength is then fed back to the control
circuits to keep coming back to the direction of the strongest
signal.
3-7
Using Your TracVision R5/R4
54-0157 Rev. H
Unlike turning the power off, the
antenna will still be operational and
drawing power when in Sleep
Mode. If you are going to be parked
for an extended period of time,
turning off the antenna will
conserve power while still allowing
you to receive the TV signals.