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[CA11] difference between RS125 and RS130
03-27-20, 12:25 PM (This post was last modified: 03-27-20 12:28 PM by Chuck - Raymarine - Moderator.)
Post: #1
[CA11] difference between RS125 and RS130
Hello,

I just recently purchased a used c97 which came with a RS130 reciever, I currently am running a C80 with the RS125.
Can you tell me the primary difference between the 2?

Thank you.
Tony Flanders

Tony Flanders
Wasilla,Ak.
C-80, DSM30/P66, RD218, RS125
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03-27-20, 12:51 PM
Post: #2
RE: [CA11] difference between RS125 and RS130
Welcome to the Raymarine Forum Tony,

The Raystar 125 GPS Sensor's communications circuitry was designed to support SeaTalk or NMEA 0183 communications. The type of communications supported by the Raystar 125 GPS Sensor was determined by the manner in which it was installed (see the Raystar 125 GPS Sensor's Installation Guide). The Raystar 130 GPS Sensor's communications circuitry was designed to exclusively support SeaTalkng / NMEA 2000 communications. The Raystar 130 GPS Sensor may be adapted to support SeaTalk (via a SeaTalk to SeaTalkng Converter) or NMEA 0183 (via a NMEA 0183 to NMEA 2000 Data Bridging device (ex. Actisense NGW-1-ISO-STNG, etc.) communications.

Both the Raystar 125 GPS Sensor and Raystar 130 GPS Sensor support WAAS (United States); EGNOS (Europe); MSAS (Japan). The Raystar 130 GPS Sensor additionally supports GAGAN (India). The Raystar 125 GPS Sensor featured a 12 channel satellite receiver while the Raystar 130 GPS Sensor featured a 50 channel satellite receiver. Both GPS receivers were capable of less than 3m accuracy. However, the position (and resulting COG) filtering of the Raystar 130 GPS Sensor was significantly better than the Raystar 125 GPS Sensor. One of the simplest ways to demonstrate the latter would be to test each system on a stationary boat. Permit each sensor to acquire a GPS position FIX. After doing so, range as far in as the MFD will permit and then start a track. Allow the system to remain on for an hour or so and then compare the resulting tracks plotted by each system. One would typically find that the plotted track of the MFD which has been interfaced to the Raystar 130 GPS sensor shows significantly less, if any, detected movement.
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03-27-20, 01:28 PM
Post: #3
RE: [CA11] difference between RS125 and RS130
Chuck,

A couple of other questions regarding the c97 and GPS:

- the c97 has a built in GPS sensor, would using the RS130 be considered an upgrade to that?
- as mentioned I have a RS125 installed on the boat, is the RS125 cabling adaptable for the RS130 so I don't have pull out the old and pull in new?

thank you for your help!

Tony Flanders
Wasilla,Ak.
C-80, DSM30/P66, RD218, RS125
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03-27-20, 01:44 PM
Post: #4
RE: [CA11] difference between RS125 and RS130
Tony,

Q1. the c97 has a built in GPS sensor, would using the RS130 be considered an upgrade to that?
A1. Yes ... particularly with respect to sensitivity. An external GPS sensor is often employed within such systems when the MFD having an internal GPS sensor has been installed in a location which will not afford it an unobstructed view of the skies overhead. This action is also taken if the mounting surface has been determined to reduce GPS signal strength received by the MFD.

Q2. Is the RS125 cabling adaptable for the RS130?
A2. Negative. It will be necessary to replace the RS125's cable with the Raystar 130 GPS Sensor's Spur Cable or a Raystar 150 GPS Sensor's Spur Cable.
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03-27-20, 02:07 PM
Post: #5
RE: [CA11] difference between RS125 and RS130
Thanks again Chuck!

Tony Flanders
Wasilla,Ak.
C-80, DSM30/P66, RD218, RS125
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03-27-20, 02:31 PM
Post: #6
RE: [CA11] difference between RS125 and RS130
You're welcome.
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