[time-nuts] OT: Power level reference

[Adrian]

John,

it might easily happen ;)

Even the HP 434A that was introduced 50 years ago appears to be still in 
use by some power nuts:
http://www.electricspacecraft.com/pitfalls%20for%20web.pdf

Adrian


J. Forster schrieb:
> How accurately do you NEED to measure power? Is this the start of a new
> Group...  Power Nuts?
>
> The 432A / 478A / 8477A and a good DMM is waaay good enough for ANY real
> engineering use.
>
> -John
>
> ======================
>
>
>   
>> and... I forgot to mention the Rohde & Schwarz NRS that goes from DC to
>> 15 GHz.
>> The maximum accuracy method (advanced substitution method - using a
>> standard cell) described in the manual is probably what you're looking
>> for.
>> Btw. mine has all three available heads for 50, 60 and 75 ohms. I've
>> been close to selling it until I discovered what a marvelous instrument
>> it is.
>>
>> Adrian
>>
>>
>> Joseph Gray schrieb:
>>     
>>> We all have our various highly accurate frequency and perhaps time
>>> references. Is there a relatively simple and inexpensive method of
>>> making an accurate RF power level reference? If so, then what do we
>>> calibrate it with, not already having such an accurate reference?
>>>
>>> One possibility that comes to mind is an HP 436A power meter. These
>>> are abundant and usually have no sensor probes (which are expensive).
>>> They also have a built in 50MHz, 0dBm reference. However, without more
>>> fancy test equipment, I have no way to calibrate the reference, or
>>> even verify that it is accurate.
>>>
>>> Joe Gray
>>> KA5ZEC
>>>
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>>     
>
>
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