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Author Topic:   Standard-Horizon GX1000S and Class-D DSC

BellBoyBob posted 03-16-2008 04:21 PM ET (US)
Is the [Standard Horizon GX-1000-S] "Eclipse" entry-level DSC radio from Standard Horizon rated as a Class-D DSC Radio? It is available for $85 and claims to facilitate DSC position send and request polling on a GPS. The radio has NMEA in/out. It does NOT, however, say anything about being Class-D. With these features, does that really matter? Any insight would be most appreciated.
Bob
jimh posted 03-16-2008 04:36 PM ET (US)
If the radio does not claim to be a DSC Class-D rated radio, it probably is not a DSC Class-D radio. The requirements of DSC rating have nothing to do with having a NMEA interface or being able to perform remote position polling. Those features are not required in any DSC radio. The principal features required in a Class-D radio are described in an article in the REFERENCE section. See
Digital Selective Calling: Class–D
http://continuouswave.com/whaler/reference/dscClassD.html
As you will see, the terms NMEA and "remote position poll" are not even mentioned. Those are nice features, but they just are not related to being certified for DSC Class-D use.
The principal feature needed for a DSC radio rated Class-D is the ability to maintain a simultaneous radio watch on Channel 16 and on the DSC Channel 70. This feature contributes to the capability of the radio as part of the overall fleet of vessels equipped with GMDSS radios.
In terms of sending a distress call using DSC, there is really no difference among DSC radios. They can all send a distress call.
There are other operational features necessary to earn the Class-D rating. If you read my article you will get a better sense of what they involve.
BellBoyBob posted 03-16-2008 06:46 PM ET (US)
Thanks, Jim. That clarifies things. I was recommending the SH gx1000s to a boating buddy of mine who is trying to get the polling features at an entry level price. It seems this radio will do this.
Bob

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Author	Topic: Standard-Horizon GX1000S and Class-D DSC
BellBoyBob	posted 03-16-2008 04:21 PM ET (US) Is the [Standard Horizon GX-1000-S] "Eclipse" entry-level DSC radio from Standard Horizon rated as a Class-D DSC Radio? It is available for $85 and claims to facilitate DSC position send and request polling on a GPS. The radio has NMEA in/out. It does NOT, however, say anything about being Class-D. With these features, does that really matter? Any insight would be most appreciated. Bob
jimh	posted 03-16-2008 04:36 PM ET (US) If the radio does not claim to be a DSC Class-D rated radio, it probably is not a DSC Class-D radio. The requirements of DSC rating have nothing to do with having a NMEA interface or being able to perform remote position polling. Those features are not required in any DSC radio. The principal features required in a Class-D radio are described in an article in the REFERENCE section. See Digital Selective Calling: Class–D http://continuouswave.com/whaler/reference/dscClassD.html As you will see, the terms NMEA and "remote position poll" are not even mentioned. Those are nice features, but they just are not related to being certified for DSC Class-D use. The principal feature needed for a DSC radio rated Class-D is the ability to maintain a simultaneous radio watch on Channel 16 and on the DSC Channel 70. This feature contributes to the capability of the radio as part of the overall fleet of vessels equipped with GMDSS radios. In terms of sending a distress call using DSC, there is really no difference among DSC radios. They can all send a distress call. There are other operational features necessary to earn the Class-D rating. If you read my article you will get a better sense of what they involve.
BellBoyBob	posted 03-16-2008 06:46 PM ET (US) Thanks, Jim. That clarifies things. I was recommending the SH gx1000s to a boating buddy of mine who is trying to get the polling features at an entry level price. It seems this radio will do this. Bob