ard at p850ug1.demon.co.uk
Mon Aug 8 17:05:48 CDT 2005
> I think I have to reluctantly give the nod to the DEC 1350 in terms
What the heck is a DEC 1350? A PDP11 with an IB(V)11 card driving an HP1350?
> of capability. But I think the HP's analog vector generator outperforms
> DEC's digital vector generator.
In what way is the HP vector generator analogue? I've just looked in the
service manual, it has subtractors to calculate the length, XOR gates to
get the absoule value of that number, counters for the X and Y positions,
rate multipliers to clock the counters based on the X and Y differences,
etc. The output of the counters feed the DACs, the outputs of the DACs go
to the output BNCs.
It's not waht I'd call an analogue vector generator, where a couple of
ramp voltages are generated using analogue circuitry based on the current
and end positions of the beam.
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