In message <email@example.com> John Brosnahan writes:
> >>The only case I can imagine is near a strong 25Mhz signal. Since the
> >>test frequency for the AEA TDR box is 25Mhz. It should be a fine test
> >>instrument for ham use....
> >>W8SS Joe
> I am not familiar with the guts of the AEA TDR but normally a TDR puts
> out a fast-rise-time DC pulse and there is no sine wave RF component. The
> PRF (pulse repitition frequency) is usually much lower than 25 MHz to
> allow for reasonably long coax runs. So I don't know where this 25 MHz
> "test frequency" comes from.
The CableMate Analyst uses pulse for the TDR display to locate
discontinuities and a 25MHz signal for RF line loss measurements.
> >As someone said earlier, I don't think AEA made a TDR box. I think these
> >two guys are talking about apples and oranges . . .
> YES, AEA made a TDR, but no one knew about it. It is/was called the CableMate
> and looks just like their HF Analyst. It was priced at $995, but the QST ad
> p.7, Sept. 1996 shows it "discounted" to $499
These are now on special offer at $299.95. AEA/Tempo say they will
have product in 3rd week of August. Phone (760) 598-9677. I have no
connection with Tempo except I am waiting for 3rd week of August :-)
Tony - G3SKR / W2TG email: firstname.lastname@example.org
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