Oscilloscope question

[Scott Stevens]

On Sat, 09 Apr 2005 11:52:08 +0100
Philip Pemberton <philpem at dsl.pipex.com> wrote:

> In message <m1DK4GO-000IxtC at p850ug1>
>           ard at p850ug1.demon.co.uk (Tony Duell) wrote:
> 
> > Solartrond DVM manuals (and the manual for the DTU [1]) contain 
> > schematics, or at least the oens I have do.
> 
> Not this one. From what I can tell, there's an Operation Manual (P/N
> 71500024) and a Maintenance Manual (P/N 71500026 or 7150026 depending
> on which part of the manual you read), which is listed as an "Optional
> Accessory" in my ops manual.
> On the plus side, the ops manual does include the calibration
> instructions. I don't have a copy of the calibration overlay for the
> keypad, but there's a 1:1 copy of it in the manual anyway. The
> calibration jackplug is a bog-standard 2.5mm mono minijack that's had
> the tip line wired to the barrel(i.e. dead short).
> 
> > That was quite common at one time. DEC PDP11 and PDP8 manuals often 
> > included ROM dumps, flowcharts, state diagrams, and so on. These
> > machines wre _documented_
> 
> Seems the late 70s/early 80s was the timeframe when this was common.
> I've got a 1992 HP 1651B service manual and it's just a boardswapping
> guide. Not even any parts lists for the individual PCBs - just a list
> of boards and how to remove them. There's not even any info on
> calibrating the acquisition timebase (I suspect it's calibration-free
> - a crystal oscillator or something).
> My Tek 466 manual (circa 1986) covers everything - schematics,
> waveforms, calibration, parts lists for every individual part on every
> PCB, microcode, performance checks...
> 
> "Scopes from Tek, spectrum analysers and logic analysers from HP,
> multimeters from Fluke"
> 
> Not sure about bench PSUs, I tend to build those myself, but I've got
> a Farnell Instruments L30/BT here (my 5A DIY PSU went bang - cheap
> components never last very long).
> 

Bench power supplies from Kepco or Harrison Laboratories (later
purchased by HP, so if you've seen a Harrision supply, you know what the
'good' HP supplies look like)