Products > Test Equipment
DG4000 - a firmware investigation
<< < (94/96) > >>
tv84:
Help yourself:

1. Try flash downgrade FW again.
2. If OK, license it and upgrade FW again.
    If NOK, change USB disk and go to step 1.
Aleks Alekseev:
Everything worked out for me. I took a flash drive from friends and everything was flashed from it. My 5 flash drives unfortunately did not work
Blanc:
This is my first time writing.
This is a question regarding a problem with RIGOL DG4062.
I bought a used DG4062. Firmware is 1.04. (I'd like to update this to 1.08 somehow, but I can't get it.)

I posted this because I wanted to know if the following problem can be improved by updating the firmware. RIGOL's official website doesn't seem to have a history of bug fixes, so it's impossible to determine whether this is a hardware failure or a software bug.

When testing, I found that for CH1, the output was largely discontinuous at output impedance settings other than High-Z (for example, 50 ohm). If you gradually increase the output from the minimum output (-56dBm), the output will be abnormally large in the 4 steps before the relay switches. When the relay switches, it returns to the continuous increasing state before the abnormal value. Also, in the High-Z output, the output is slightly discontinuous between 3.5mV-4.0mV and 80mV-110mV.

If it's a hardware failure, I'd like to try to repair it, but unfortunately I don't have a circuit diagram, so I think it will be quite difficult. If anyone has any clues, I would appreciate it if you could let me know.
TurboTom:
Welcome to the forum!

Changing the "output impedance" doesn't change the AWG Impedance in reality (it always stays at 50 Ohms). What changes is the calculated output level / voltage to represent the correct figure when you attach a load as specified in the "output impedance" setting. The menu item should rather be called "load impedance". If you find the "real" output voltage of your AWG to be discontinuous, this may well be a problem with calculating the output levels for "non-standard" load impedances, but it may as well be a problem of inaccurate calibration of the instument.

Regarding this issue, you are lucky since the DG4000 is one of the few instruments with a "real" calibration guide available (attached to this message).

I uploaded the firmware package 00.01.12.00.02 that includes a bootlaoder, here's the link. After this, it should be possible to install the latest F/W 00.01.14.00.01.

All the best and good luck!  ;)

P.S.: ...and it can be "improved" to full DG4202 specs...  8)

Blanc:
Thank you for your reply.
Reading your explanation, it seems like the DG4000's discontinuity is coming from the bug of calculation software and/or incorrect calibration. A kind person gave me an archive of old FWs containing the bug fix history. Although the history was not detailed, it seems likely that updating the FW and performing appropriate calibration will resolve the issue.

Unfortunately, I don't have a USB memory that the update process of DG4000 can recognize, so I haven't updated the FW yet.

Thank you again giving  me a manual for the calibration.
Fortunately, I already have a six and a half digit DMM, but no high frequency power meter.
However, I don't think the accuracy of high frequency output is much of a problem.

It's good for me that my troubles are not due to hardware.
I have already opened the cabinet and checked the PCB.
Seeing the small surface-mounted resistors and relays seemed a bit cumbersome.
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod