"MarkK" wrote:


OK, seems like a good place to ask this question...

I have a Tek 2712 spectrum analyzer and one of the Philips PLS157 PLA is
bad. It is in the trace blanking logic. I can buy an unprogrammed PLS157
on E-bay.

Anybody have any ideas where I can get the program info or even better a
pre-programmed part. It is A9U308 PN 160-5005-00 Man code 8009 which is
TEK .

Or failing that, anybody have an idea of what the logic is that is used to
create the blanking signal, there are about 4 or 5 inputs to this chip and
only one output is bad so I might be able to wire up some combinational
logic to re-create the function.

The logic is quite simple. I have some PDFs with diagrams created by
other people. The PLS157 dies often in these spectrum analyzers.

http://www.edaboard.com/thread17974-2.html

If you register with this site you can download the PDFs (otherwise
they are invisible):


--
Failure does not prove something is impossible, failure simply
indicates you are not using the right tools...
nico@nctdevpuntnl (punt=.)
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