[time-nuts] Test Equipment

[Luis Cupido]

But only starts at 5GHz :-(  :-(

Luis Cupido
ct1dmk


John Miles wrote:
> You could also get really hardcore and build the VNA described in DUBUS
> 4/2009 by HB9TXV.  Very nice piece of work, usable to 30 GHz.
> 
> -- john, KE5FX
> 
>> -----Original Message-----
>> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com]On
>> Behalf Of Lux, Jim (337C)
>> Sent: Thursday, January 21, 2010 3:44 PM
>> To: Discussion of precise time and frequency measurement
>> Subject: Re: [time-nuts] Test Equipment
>>
>>
>>> -----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..)
>>
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> 
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