NorthStar GM1708 961X Installation Manual

Also see for 961X: Reference manual Operation and reference manual

NorthStar GM1708 961X Installation Manual Manual pdf 63 page image

SECTION THREE - Interfacing961 INSTALLATION MANUAL Revision A Page 53Changing theoutput rateThe 961 normally uses a two-second update interval for data transmis-sion. Some applications require a longer update period, so the 961 letsyou increase that span to 199 seconds. You can choose a one-secondinterval, but at that rate, the bandwidth of 4800-baud NMEA data onlyallows the output of a reduced set of sentences.To change the output rate:1. From the PORT OUTPUT SETUP screen, press the CURSOR PAD tohighlight the SEND EVERY field.2. Enter a number, then press the ACCEPT key (or press CANCEL toleave the option unchanged).Changing theNMEA 0183waypoint IDMany marine electronic devices (such as radars and electronic plotters)can display your waypoint names, rather than a number, if they’re outputby the 961.If the peripheral equipment has this capability, at the PORT OUTPUTSETUP screen, change the 961’s 0183 WAYPTS field from NUMBERS toNAMES, by highlighting the field, making the change, and pressing theACCEPT key. The listening device will now display the nine-characterwaypoint names. Included spaces will be output. When exporting toanother device, be aware that the numerical identifiers aren’t assignedsequentially and may be re-used by the system on a random basis.Setting the NMEA0183 checksumsCertain older devices may not accept sentences containing the NMEA0183 checksum that’s output by the 961. In such cases, the device maynot operate properly, if at all.If you encounter difficulty when interfacing to older equipment, the 961offers you the flexibility of turning off the NMEA 0183 checksum:1. At the PORT OUTPUT SETUP screen, press the CURSOR PAD to high-light the 0183 SUM field, then press the EDIT key.2. Press the CURSOR PAD to change the setting from ON to OFF.3. Press the ACCEPT key (or press CANCEL to leave the optionunchanged).4. Press the RETURN key to go back to the PORT SETUP screen.Setting the auxiliary portThe auxiliary (aux) port is a general-purpose port used to transmit differ-ential corrections (interfacing with an external device that accepts SC-104NOTE:Be sure to verify this capability in the listening device beforechanging the 0183 WAYPTS field. Most older equipmentwon’t understand this identifier, and using it may cause prob-lems with the display of the waypoint information.