[time-nuts] Chinese Scopes

[SAIDJACK at aol.com]

Hi guys,
 
I am very partial to the HP Denali 54720D scope which is available on Ebay  
in varius forms for around $1500.
 
This $50K+ when-new scope is very easy to use, has many low cost plug ins,  
8GS/s with up to 2GHz Bandwidth plug ins available, and the amazing 54701A 
FET  probe. Support and spare parts supply are excellent. It's almost 
instantly  on and ready, something I really don't like about the small portable 
scopes as  they seem to take forever to boot up.
 
The plug in I find most useful is the 54721A, with 1.1GHz bandwith, that  
gives two channels plus triggers.
 
Don't look at the 54720A version, it is about the same price but has less  
performance (BW, memory etc).
 
It's a bit more than a Rigol, but for around $2200 you can get the  
mainframe, two 21A plug ins, three FET probes, and as  a side-feature the use as a 
boat anchor..
 
The only time I needed to use the manual was when using more obscure  
features such as histogram and FFT features, and then only to get all the  
details of what's possible. Otherwise it's so much easier to use than the small  
handheld Tektronix and Lecroy Waveace scopes.
 
One cool feature is to use the 54701A probe as a FET input probe  for our 
RF spectrum analyzer, using the scope as a probe power supply.  Works 
amazingly well, I've used it up to way past 2GHz.Gives the analyzer  0.6pF/100KOhms 
input impedance. The probe is almost indestrucable.
 
bye,
Said
 
 
In a message dated 4/16/2012 19:54:42 Pacific Daylight Time,  
hmurray at megapathdsl.net writes:


>  To bring this full circle, a friend bought a very clean, working 465 for 
 $50
> at MIT. 

Did that include probes?  :)

Good  probes are probably worth more than that even without the scope.


--  
These are my opinions, not necessarily my employer's.  I hate  spam.




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