[time-nuts] Test Equipment

[Lux, Jim (337C)]

> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf Of Gerhard Hoffmann
> Sent: Thursday, January 21, 2010 2:50 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Test Equipment
> 
> Lux, Jim (337C) wrote:
> > What frequency ranges?
> > If you are interested in <60MHz, then something like the TenTec TAPR VNA
> > ($600) connects to a PC or a mac.  Works as a signal generator and as a 2
> > port VNA.
> >
> >
> Or this one:
> http://groups.yahoo.com/group/VNWA/
> (DG8SAQ)
> 
> Excellent to 500 MHz, quite usable to 1300 MHz.
> Does 6 or 12 term error correction, most of this VNA is software.
> I'm just using one to tune a 100 MHz oscillator with opened loop.   :-)
> 
> The only drawback is that one cannot measure compression
> because the absolute levels vary over f.
> 
> But then it can embed / de-embed, virtual match, display the Q
> and equivalent circuit of a crystal from S11 measurement,
> L, C, time gating and and and.
> 


Outstanding.. that one is very competitive in price (using a ballpark $2/GBP conversion) to the TAPR one.

I'm glad that more of these are becoming available (as assembled units, not as kits..)