[time-nuts] testing L1 antenna

[Mark C. Stephens]

Thanks Tom, but the only RF genny I have is a pair of HP 8568B and a HP 8567A I think it is.
The fan runs all the time on the 8567A so it mainly stays unplugged..

The only thing I have that can go that high is an 8350B Sweeper with a 83522A plugin (0.01-2.4 GHz).
Can I utilise the sweeper somehow?


--marki

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf Of Tom Miller
Sent: Thursday, 25 July 2013 4:58 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] testing L1 antenna

You might generate a CW RF test signal at a level that allows easy detection on the SA. Maybe into a simple dipole antenna. A second dipole test antenna could establish a reference that you could relate the GPS antenna gain to.

Tom


----- Original Message -----
From: "Mark C. Stephens" <marks at non-stop.com.au>
To: <time-nuts at febo.com>
Sent: Thursday, July 25, 2013 2:51 AM
Subject: [time-nuts] testing L1 antenna


I have a number of GPS L1 timing antenna up, and I suspect one of them is 
not quite right.

As a test procedure, all I can come up with is a power-injector connected to 
the feed line, the feed line connected to a DC block on the input of a 8566A 
SA.
Then connect a known good antenna and compare the DUT.
Note: I haven't tried this yet, still thinking about it :)

Has anyone got a proven method to check a GPS timing antenna for reliable 
operation?


--marki
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