Post Reply 
 
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
[DG] [DG] AIS 700 - AIS Antenna problem
09-27-18, 05:13 AM (This post was last modified: 09-27-18 07:21 AM by Derek - Raymarine - Moderator.)
Post: #1
[DG] AIS 700 - AIS Antenna problem
Hello,

I keep getting an error with my AIS 700. on the diagnostic page of the proAIS2 software i keep seeing a red X by the AIS antenna list. I'm wondering what this means and if there are other diagnostic tools to help me solve the problem. (though i realize its prob an issue with my VHF antenna)
Find all posts by this user
Quote this message in a reply
09-27-18, 07:47 AM
Post: #2
RE: [DG] AIS 700 - AIS Antenna problem
Hi nachothecat

Thankyou for your enquiry.

The key diagnostics to check in PRO AIS2 is the VSWR reading . . ideally it should be between 1.0 :1 and 2.0 : 1, VSWR is a ratio of how efficient the antenna (and cable) is, the higher the ratio the poorer the performance.

check out this FAQ found here for more information, ( it refers to AIS 650, but the antenna issues will be the same)

So if the VSWR is high, then either the antenna is at fault or the cable/ connections to the antenna. Please also bear in mind that some antennae are not suitable for AIS transmissions, most antenna are specified for a range of frequency and AIS operates circa 162MHz, this needs to be in the middle of the range for the antenna selected.

regards
Derek
Find all posts by this user
Quote this message in a reply
09-29-18, 06:28 PM (This post was last modified: 09-30-18 04:04 AM by Chuck - Raymarine - Moderator.)
Post: #3
RE: [DG] AIS 700 - AIS Antenna problem
Make sure the antenna, if on a ratchet mount, is not laying down horizontal. High VSWR can result and give you a bad antenna indication.
Visit this user's website Find all posts by this user
Quote this message in a reply
10-01-18, 09:17 AM
Post: #4
RE: [DG] AIS 700 - AIS Antenna problem
Thankyou - also good advice
Thanks
Derek
Find all posts by this user
Quote this message in a reply
Post Reply 


Forum Jump:


User(s) browsing this thread: 1 Guest(s)