Operating Instructions and Installation Instructions

ComNav Vector G2/G2B Installation & Operation Operation

Document PN 29010078 V2.0 - 57 -

DRAFT #3 – 29 May 2009

Other Commands

The commands in Table 8 through Table 16 above are all the ones typically used in

marine applications of the G2.

There are several other commands which Hemisphere’s Crescent chipset supports.

Most of these other commands are documented in the GPS Technical Reference

However, it should be noted that the GPS Technical Reference is a general-purpose

reference for the Crescent chipset, & products based on that – but ComNav’s Vector G2

& G2B products do not implement all of the chipset’s features. So, the information in that

document must be used with some caution, when used with the G2.

• Some of these other commands can be used for special applications,

diagnostics, or other purposes. Describing them and their use is beyond the

scope of this manual.

• Some of the rest simply make no sense in the G2. The chipset provides them (&

reacts to them) for when it used in discrete-antennae GPS Compass products

(such as the Hemisphere Sensors, or ComNav’s Navigator G4), in custom circuit

designs, or in OEM products built around Hemisphere’s GPS Receiver “module”.

• The remainder of the other commands are for features and functions not

supported in ComNav’s versions of the Hemisphere products.

• Some specific items you should ignore are:

– all “subscription”, e-Dif, L-Dif & OmniSTAR features, and related commands

– anything related to Ports C & D

– the $JALT, $JAPP, $JCONN, $JK, $JLIMIT and $JWCONF commands

– the $JATT,FLIPBRD command

– any commands relating to Binary outputs Bin 76 & 93

Some newer ones are not mentioned, and there are also some formatting errors in the document.