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Re: [TenTec] more oscilloscope questions

To: "J. W. (Dub) Thornton" <dub@atlinkwifi.com>
Subject: Re: [TenTec] more oscilloscope questions
From: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Reply-to: geraldj@weather.net, Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Sun, 11 Jul 2010 17:20:11 -0500
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
The manuals (service and user) for the HP1745 are on line at: 

As for those shopping, I've found it really handy when looking for 
complex machinery (like a farm tractor, or planter) to acquire the 
manual first, then when I shop after studying the manual I can know more 
than the seller and exercise the equipment better before buying.

The HP 1740 manual is at:

Tek isn't as friendly without signing in with a serial number which 
makes manual study before purchase difficult without PAYING for the 
manual. There have been quite a number of scopes, lately mostly digital 
since the 465 and 1740 were competing for the market. For RF work I 
still prefer the analog scope because things don't often repeat for a 
sampling scope that expects repetitive signals to grab properly.

There are probably tutorials available from Tek and HP/Agilent on use of 
the analog scopes that go into detail on how to calibrate and how to 
show waveforms.

73, Jerry, K0CQ

On 7/11/2010 11:18 AM, J. W. (Dub) Thornton wrote:
> Jerry:
> Is the HP 1745 a good'un then? I have had a 1745, with two TEK P6131 10X
> passive probes for a few years, but was unable to find a manual for it
> when first
> bought it, and have not tried for a while now. Never used a scope enough to
> even know HOW to use one, but enjoy reading postings from you particularly,
> along with a few of the other guys that seem to know what they are
> talking about.
> I have been a big fan of Ten Tec for a lotta years, and have a stable of
> 7 of their
> rigs dating from the Omni VI Option 3, back thru the Triton IV digital.
> I am also a
> big fan of Elecraft, and built the K2 #317 and K3 # 833.
> Appreciate your opinion on the 1745.
> Thanks, 73 Dub K5DUB
> At 09:30 AM 7/11/2010, you wrote:
>> If its not Tek or HP and if its HP before the 1740, its not really a
>> scope that works well and reliably. Yes there were pretenders but their
>> products tended to be poor with poor bandwidths and lousy sweep
>> triggering. The Tek 465 except for the delayed sweep switch and the HP
>> 1740 or 1742 have been reliable tools that work well and are FLAT to
>> their bandwidth spec, not 3 dB down a the bandwidth spec. These are 200
>> MHz and most logic glitches will be seen by them. A 30 MHz scope can
>> miss glitches that logic can make. With my 475 on the bench I used it
>> for DC through UHF measurements and set the VTVM on the back test
>> equipment shelf. I quit using a meter with a GOOD DC scope available.
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