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Old 10-11-2017, 1:22 PM
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Default VXD-R70 Repeater lost transmit.

I have been running a VXD-R70 for my business for the last 2 years. I have lost the transmit strength. I installed my signal meter on the transmit side and also checked after my duplexer and the output is 15watts max. In my CPS software it is set for 45watts. Could my transmit radio have gone out already? The system is used minimally. Thanks for any help, Matt.

Last edited by Mattguy; 10-11-2017 at 2:45 PM..
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Old 10-11-2017, 8:19 PM
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Are you saying that the output of the duplexer is 15W?

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Old 10-11-2017, 8:22 PM
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Quote:
Originally Posted by Mattguy View Post
I have been running a VXD-R70 for my business for the last 2 years. I have lost the transmit strength. I installed my signal meter on the transmit side and also checked after my duplexer and the output is 15watts max. In my CPS software it is set for 45watts. Could my transmit radio have gone out already? The system is used minimally. Thanks for any help, Matt.
If only 2 years old, its still under the 3 year warranty. Contact the dealer that sold you it and get to the depot asap.

This is a fairly common issue its cousin the XPR8300/XPR8400.
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Old 10-11-2017, 8:42 PM
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Thank you wiscomm. The date on box is 2/3/2013. Would the warranty still be in effect from the purchase date or manufacture date?
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Old 10-11-2017, 8:43 PM
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Thank you wiscomm. The date on box is 2/3/2013. Would the warranty still be in effect from the purchase date or manufacture date?
Purchase date from dealer to you.
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Old 10-11-2017, 8:44 PM
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Are you saying that the output of the duplexer is 15W?

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I checked to make sure duplexer was not bad by testing power before and after duplexer. Output is 15 watts either way. I heard of issues with the transmit radio going bad and people swapping the heads.
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Old 10-11-2017, 8:51 PM
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Old 10-11-2017, 10:25 PM
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Did you check both forward and return power? That being said, it is possible the unit could be folding down because of excessive VSWR due to a problem in the antenna system. This is done to protect the final on the repeater.

Or it could very well be a bad PA in the unit itself...
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Old 10-13-2017, 8:36 AM
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Quote:
Originally Posted by Mattguy View Post
I have been running a VXD-R70 for my business for the last 2 years. I have lost the transmit strength. I installed my signal meter on the transmit side and also checked after my duplexer and the output is 15watts max. In my CPS software it is set for 45watts. Could my transmit radio have gone out already? The system is used minimally. Thanks for any help, Matt.
What power level is the station rated for? Did you actually verify that power level directly at the transmitter terminals, into a dummy Load? Going by what the software shows could be way off.

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Old 10-13-2017, 9:00 AM
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I installed my power meter between my duplexer and antenna. Also between TX output and antenna with no duplexer, to see if it was a duplexer issue. All of a sudden one day we lost the distance we had. It will only reach out about 5 miles now. Before I was hitting 35 miles.
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Old 10-13-2017, 10:05 AM
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Quote:
Originally Posted by Mattguy View Post
I installed my power meter between my duplexer and antenna. Also between TX output and antenna with no duplexer, to see if it was a duplexer issue. All of a sudden one day we lost the distance we had. It will only reach out about 5 miles now. Before I was hitting 35 miles.
What kind of power meter is this and what is the reflected power from the antenna?

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Old 10-13-2017, 12:12 PM
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I second checking reflected power if your equipment is capable. Between the duplexer and antenna. If you have a dummy load you can check it between the duplexer and the dummy load. Sometimes cans can become untuned as well. So you can hook up your power meter between the repeater and a dummy load.

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Old 10-13-2017, 2:13 PM
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Quote:
Originally Posted by Mattguy View Post
I installed my power meter between my duplexer and antenna. Also between TX output and antenna with no duplexer, to see if it was a duplexer issue. All of a sudden one day we lost the distance we had. It will only reach out about 5 miles now. Before I was hitting 35 miles.
"All of a sudden lost range" Did you test the antenna?
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Old 10-13-2017, 2:25 PM
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The OP said the CPS software is "set to 45 watts". Unless you verify with a proper external watt meter, the power level could be too high leading to damage. Or it could be that forward or reverse power limits have been triggered.

A sudden power level failure could be antenna, feedline or the PA.

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