Specifications

VP ONCORE COMMAND REFERENCE
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POSITION FIX/IDLE MODE SELECT(@@Cg)
This utility allows the user to place the VP receiver into one of two
possible operating modes: Position Fix or Idle mode. The Position Fix
mode is the normal operating mode of the VP receiver in which it
acquires and tracks satellites and computes position from the satellite
measurements. The Idle mode is a reduced power mode in which the VP
does not track satellites. The receiver’s MPU is active only while it
operates on input commands and creates output response messages. All
other times the receiver is placed in a low-power wait state in which it
waits for the next command string to be entered via the serial port.
Default value: Idle
NOTE: This command has probably caused more confusion and
consternation amongst Oncore receiver users than the rest of the
commands combined. This is especially true of users who first learned
how to work with newer Oncores such as the GT/UT, and then were
handed a VP to work with.
The VP was the ONLY Oncore ever supplied with a Position Fix/Idle
command, so if you are not used to dealing with it, it can drive you nuts
until you figure out what is going on. Basically, when in Idle mode, the
RF section of the receiver shuts down, and all internal activity stops. This
means no message traffic, etc. There are three ways to get into Idle
mode:
1. Command the receiver into Idle mode using this command.
2. Default the receiver using the @@Cf command.
3. Perform a receiver Self-Test.
This is what trips up most users familiar with the GT/UT receivers.
Whenever they default the receiver they simply issue an @@Ea
command (or whatever...) and the receiver starts right back up again.
Well, the VP won't. You must issue the Position Fix Mode command in
order to restart the receiver.
The Self Test problem is similar. After performing a Self Test, a GT/UT
will start right up where it left off. The VP will complete the Self-Test, go
into Idle Mode, and simply sit there until the Position Fix Mode
command is received.
118 Synergy Systems, LLC 05OCT01