开云体育

Dear forum members!

I have THS720 and just wonder whether by a "not so simple" FW change THS720 could be upgraded to THS720A or THS720P? The functional difference is in having for later models the external trigger input. I wonder whether someone already tried anything like that? HW seem to be almost the same between A and not-A models.
Also it's known that the flash IC in question contains the calibration data too. It's a 680x0 (683xx) based machine. It would be interesting to check whether there is a some sort of ISP function built-in into the FW. I don't believe that Tek service guys had to unsolder anything to re-program the new version of the FW.

Thank you!

Maxim

On Sat, Oct 20, 2018 at 10:59 AM, <maxim.vlasov@...> wrote:

I have THS720 and just wonder whether by a "not so simple" FW change THS720
could be upgraded to THS720A or THS720P?

I don't believe that Tek service guys had to unsolder anything to re-program the new
version of the FW.

All the original non-windows TDS's except the 200, 300 and 3000 series
had their F/W updated through the GPIB connector. To update the 300's
a special pod was connected to a connector on the main board. The other
end of the pod was connected to a PC with both GPIB and RS232. It was
powered by an 18 VAC adapter. The pod P/N was 067-1436-00.
The THS's used the same pod plus a cable adapter to connect to a connector
under the keyboard. To update a special DOS software in conjunction with
the F/W data files was used.

According to the info I have the THS non-A and A are not compatible.

/H?kan

On Sat, Oct 20, 2018 at 05:05 AM, zenith5106 wrote:

According to the info I have the THS non-A and A are not compatible.

/H?kan

Thank you H?kan,

I see. So, since the connector has the 680x0 bus on it, likely the pod had the complete programmer putting the main THS CPU in the Hi-Z mode on the bus and taking the controls over the THS internals.
By analyzing the board of my THS720 and the schematics of THS720a, I could assume that likely the FW will work, but the external calibration routing will fail when checking the external trigger. I have no circuitry for the extenal trigger at all. The rest seems to be identical apart from quite a few common mode chokes.
Have anyone actually tried to boot the 1.14-1.16 FW on the THS710/720 scope?
As you say the legit tools wouldn't support this, however.

Thank you,

Maxim