Hi Siggi, Thank you for your useful comments. The is a 2445 scope and not 2445A or 2445B. I believe the scope has lost calibration data. The scope shows a failure of Test 04. With a status of 11. Havi

I have tested the "A+" input to U800 and whilst there is a large DC offset there is no AC component.

I am having issues with a 2445 Oscilloscope that is not showing the A horizontal sweep. The “B” sweep appears when the B delayed time base is used. The readout shows some dots on the bottom line of te

Hi Mark & Others, I have finally managed to program new EPROMs after a bit of a nightmare in having misplaced my old programmer and also loosing the software for another one. The bad news is the re-pr

Hi, I am trying to do some calibration work on a 2230 scope. The position control is somewhat misaligned and normally to centre the horizontal sweep the position control is not in the 12 o’clock posit

Hi Chuck, Looking at the schematics the processor seems to be driven by a 5MHz clock (the clock being generated by a 10MHz crystal). According to the datasheet for the 6802 the maximum clock frequency

Hi, Thankf for this. I still would like to find out the access time for the 27128 EPROMs that are used in the instrument. Does anyone know what the this is? Thanks, Chris

I need to replace the EPROMs in a 2445 oscilloscope. These appear to be two 27128 EPROMs with part numbers 160-1994-09 & 160-1995-09. Does anyone know the access time required for these? I am able to

Hi, I have two TCP202 current probes that appear to have issues. The first probe has a large DC offset and is not able to be balanced using the balance thumbwheel. The coarse adjustment in the probe a