User's Manual Part 1

90 OEMV Family Installation and Operation User Manual Rev 5B
Chapter 5 Positioning Modes of Operation
5.4.3 L-Band Commands and Logs
The ASSIGNLBAND command allows you to set OmniSTAR or CDGPS base station
communication parameters. It should include a relevant frequency and data rate, for example:
assignlband omnistar 1536782 1200
or,
assignlband cdgps 1547547 4800
The PSRDIFFSOURCE command lets you identify from which source to accept RTCA1, RTCM1,
CDGPS or OmniSTAR VBS differential corrections. For example, in the PSRDIFFSOURCE
command, OMNISTAR enables OmniSTAR VBS and disables other DGPS types. AUTO means the
first received RTCM or RTCA message has preference over an OmniSTAR VBS or CDGPS message.
The RTKSOURCE command lets you identify from which source to accept RTK (RTCM, RTCMV3,
RTCA, CMR, CMRPLUS and OmniSTAR HP) differential corrections. For example, in the
RTKSOURCE command, OMNISTAR enables OmniSTAR HP or XP, if allowed, and disables other
RTK types. AUTO means the NovAtel RTK filter is enabled and the first received RTCM, RTCA or
CMR message is selected and the OmniSTAR HP or XP message, if allowed, is enabled. The position
with the best standard deviation is used in the BESTPOS log.
The HPSEED command allows you to specify the initial position for OmniSTAR HP.
The HPSTATICINIT command allows you to speed up the convergence time of the HP or XP process
when you are not moving.
The PSRDIFFSOURCE and RTKSOURCE commands are useful when the receiver is receiving
corrections from multiple sources.
Several L-Band specific logs also exist and are prefixed by the letters RAWLBAND, LBAND or
OMNI. CDGPS corrections are output similarly to SBAS corrections. There are four SBAS fast
corrections logs (WAAS32-WAAS35) and one slow corrections log (WAAS45) for CDGPS. The
CDGPS PRN is 209.
 1. In addition to a NovAtel receiver with L-Band capability, a subscription to the
OmniSTAR, or use of the free CDGPS, service is required. Contact NovAtel for details,
see Customer Service on Page 18.
2. All PSRDIFFSOURCE entries fall back to SBAS (even NONE) for backwards
compatibility.
Refer to the OEMV Firmware Reference Manual for more details on individual L-Band commands
and logs.