Re: CS>Re: SO>Frequency and the meaning of words.
From: Jim Meissner
Date: Sun, 15 Aug 2004 08:09:22
http://escribe.com/health/thesilverlist/m72465.html
> Dear Mike:
>> Where on earth did you find the url? I googled for an hour and
>> came up empty. I was trying to find the datasheet and
>> specifications - if you have the url, please post it!!!
> I found the "1.3 GHz Hand Held Frequency Counter" in my MCM
> (www.mcminone.com) catalog page 572 of catalog 48. It is a Tenma
> 72-6605. Price is $204.75.
No wonder I couldn't find it. Tenma doesn't make a 3GHz counter:
http://www.mcmb2b.com/cgi-bin/test/counters1.html
> The input A that is specified to be used in the instructions is 1
> megohm input impedance with 25 pF shunt capacitance. So the 50 ohm
> noise calculation is not valid for 1 megohm.
> The frequency response of input A is 5 Hz to 25 MHz. So he is
> measuring 60 - 90 Mhz on a range that is only specified to go to
> 25 MHz.
The web page talks about a completely different counter than the one
shown in the photos.
>> Just for fun, let's go through the calculations and verify
>> Bruce's accuracy. For that, we'll need an equation solver called
>> Mercury, written by Roger Schafley, who also wrote Borland's
>> Eureka.
> Boy, oh Boy, if I ever need something calculated I will call on
> you.
Nah - I'd be happy to check your calculations, but you'll have to do
them yourself:) Give Mercury a try - you might find it easier than
you think!
http://archives.math.utk.edu/software/msdos/calculus/mrcry209/mrcry209.zip
> Thank you Mike.
Thank you, Jim.
> Jim Meissner www.MeissnerResearch.com
Best Wishes,
Mike Monett
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