The readout acquire uses the same ICs although it is encoded to binary
and processed by the microprocessor before being displayed.
I left out checking for the time slot pulse in my post. If it was
missing, then there could be short/open or U2320 (155-0017-00) which
is another custom Tektronix readout could be bad.
On Tue, 10 Jul 2012 13:13:23 -0000, "Albert" <aodiversen@...>
wrote:
Sure, though readout acquire, as viewed from the plugins, is still the old method. Missing units in readout could be caused by a fault during the corresponding time slot TS-9. I would first of all check for the presence of the -15V pulses at the main interface connectors, contacts B39. All 4 plugin positions have the B39 contacts in common so all should show the TS-9 pulse.
Albert
--- In TekScopes@..., "David C. Partridge" <david.partridge@...> wrote:
The readout in the 7854 is radically different - it is part of one of the logic boards.
Dave
-----Original Message-----
From: TekScopes@... [mailto:TekScopes@...] On Behalf Of Rob
Sent: 10 July 2012 02:49
To: TekScopes@...
Subject: RE: [TekScopes] 7854: Excessive stored trace brightness.
P.S. All the numbers above are for a 7904. I assume they are the same in a 7854.
David Hess