Thanks Roy. Mine shows it to measure 75 normally, but 1.3:1 in the Advanced
3 @75 ohms. Either I better change my brand of smokes or the Micro forgot
how to do the calculation... Better go back and try again to see it I
goofed somewhere...but I've done that several times...... . . . . .
.. .


Am I correct about this being simply a calculation?

--
Steve N, K,9;d, c. i My email has no u's.



"Roy Lewallen" wrote in message
...
My MFJ 269 shows the SWR of a Tektronix 75 ohm termination as 1.0:1 up
to 77 MHz when Z0 is set to 75 ohms.

Roy Lewallen, W7EL

Steve Nosko wrote:

Ian, and others,

I have the 269 HF VHF UHF analyzer and noticed something strange.
In
the "non-50 ohm" Advanced menu 3 mode, with the Zo set to 75 ohms, an
otherwise good 75 ohm load (please assume I know how to tell and I used
a
low frequency to reduce errors) shows something like a 1.3 : 1 SWR.
When I
called to ask about it, the first tech at MFJ seemed confused and
clearly
did not understand. Another call, on another day resulted in a better
tech,
but the response was to send it in for re-calibration. This also seems
to
be a calculation rather than an adjustment, no?

Once you know Z it is a simple calculation to get to SWR for another Zo.
Or
have I been smoking a bad brand...?

Woha! I see they have on line calibration manual for the 259B & 269 on
line!
http://www.mfjenterprises.com/MFJ-259Bcalibration.php
http://www.mfjenterprises.com/man/pd...alibration.pdf

I don't see anything other than "watch the blinking SWR" .(sounds like a
British insult) for the Advance 3 "calibration".