Specifications

VP ONCORE COMMAND REFERENCE
WHAT EXACTLY IS A VP?
I fully admit to being rather cavalier in my definition of a “VP”. This command reference is usable
for early packaged Oncore receivers such as the “PVT-6”, 6 and 8 channel “Basic” Oncores, and
finally the 6 and 8 channel board level product “VPs”. The common thread is that they all respond
to the commands shown here (or some subset, depending on age and firmware revision.)
IDENTIFICATION BY MODEL NUMBER
Most of the Oncore receivers have some sort of bar-code tag that identifies the receiver by model
number and serial number. If there is no tag, the only way to positively identify the receiver is by
querying the Receiver electronic ID using the binary @@Cj command. While by no means
complete, the following list should allow you to identify 90% of the receivers out there. We know
for a fact that a lot of “house numbered” receivers with total jibberish for model numbers have
worked their way into the surplus market, but under the skin they are probably pretty standard
parts. “If it walks like a VP, talks like a VP, and acts like a VP, it’s probably some variation of a
VP.....”
Model Number Receiver Details
PVT6xxxxxxxxx Early 6 channel Oncore
A121xxxxxxxxx “Basic Oncore”, could be either 6 or 8 channel
B1xxxxxxxx Early 6 Channel VP Oncore
B2xxxxxxxx B1 with enhanced RF filtering
B3xxxxxxxx First 8 channel VP Oncore
B4xxxxxxxx B3 with enhanced RF filtering, interim configuration
between B3 and B8
B8xxxxxxxx Final version of 8 channel VP receiver
Naturally, the operating firmware was undergoing improvements and expansion during the
progression through the various models of hardware. This means that your old 1994 vintage PVT-
6 will probably NOT respond to all of the commands included in this document, while your B3, B4,
and B8 receivers should work just fine. The good news is that most of these older receivers can
have their firmware inexpensively re-flashed to give them increased functionality (add 1PPS
functions, TRAIM, Carrier Phase), fix old bugs, etc. If this is of interest, simply email us at:
[e-mail].
That’s about all I have. If any of you VP gurus out there find any glaring errors or omissions in this
doc, please let me know so that I can clean up after myself........
Best Regards,
Randy Warner
Senior Applications Engineer
Synergy Systems, LLC
[e-mail]
2 Synergy Systems, LLC 05OCT01