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Author Topic:   GX2100AIS Radio from Standard-Horizon
jimh posted 05-29-2010 08:45 AM ET (US)   Profile for jimh   Send Email to jimh  
In recent conversation with support specialist Scott Iverson at Standard-Horizon, I learned more about the new GX2100AIS VHF Marine Band Radio with AIS receiver. I was already impressed with the radio, but Scott told me of several features that should be interesting to share:

The radio actually has four receivers that operate simultaneously:

--a general coverage FM radiotelephone receiver for the VHF Marine Band channels for voice reception;

--a digital selective calling receiver for data reception on the reserved DSC broadcast channel 70;

--an automated identification system digital data receiver for AIS broadcast reception on channel 87; and,

--an automated identification system digital data receiver for AIS broadcast reception on channel 88.

The intermodulation signal rejection of the radio is rated at 80-dB. This excellent performance is obtained by use of doubly-balanced mixers, RF attenuators, and careful design. This level of performance was previously available only in the top-of-the-line VHF marine radios.

The display of AIS targets on the radio's front panel display is intentionally limited to the ten closest targets. This prevents the display from "turning black" with too many targets shown, as could occur if the radio were in an area with many AIS vessels, such as a busy commercial harbor.

In regard to resetting the radio's MMSI number, the reason the radio must be returned to Standard-Horizon for reprogramming is due to federal requirements. Further, the technique for reprogramming the MMSI is quite complex and requires specialized hardware and software, again needed to comply with federal regulations. There is not a secret keyboard sequence or other easily implemented way to reprogram the radio's MMSI.

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