Are there any options available to reprogram the firmware in the TDS340A, TDS360 and TDS380 series scopes? Thanks, Chris

Hi Jared, Thanks for this information. After a number of searches on the web I found that UTsource seems to be honestly reporting the condition of the stock they can source. For the DS1486 all the sup

Thanks very much for sending through the links. That appears to be a lot easier than I was expecting. Are the Chinese options really that bad? Surely they would be encapsulating something similar to t

Thanks for the reply. I take it that the option codes are stored in the DS1486 then? I have an old PC with a GPIB card however its power supply has failed so I need to get it up and working again. Wha

I have one TDS684A scope that seems to have its NV RAM on the way out. The unit has been powered off for years now and when I powered it up a message came up indicating the signal path compensation va

I've replaced the channel switch with no luck. I am keen to check the channel 1 enable signal NOT(VS1) but as this is a hybrid to hybrid signal it is not easy to access. It would also be good to confi

Hi, I am faultfinding a 2445 that is not showing the calibration signal on channel 1. When I try to move the position on channel 1 this also does not move the trace. On channel 2 the calibration signa

Hi, Sorry for the very long delay in replying. Inside the container is a black open cell foam with comparatively large cells. The foam had not broken down. It does appear the foam was glued in place a

I have some TM-500 plugins that have been stored for a number of years in the garage in what I thought was a safe plastic storage container that is almost fully sealed from the atmosphere. To my horro

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