"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.

If anybody out there has any info about this, I could use it.

TIA

Mark

Mark,

You might try searching the following Yahoo forums:

http://tech.groups.yahoo.com/group/TekScopes/
http://tech.groups.yahoo.com/group/TekScopes2/

The first one gave 59 hits on "2712 spectrum analyzer", and the second
gave 2 that were of no interest.

But you might find someone who has more information on what you are
looking for. I'm sure if the information exists, they can help you find
it.

Mike