Products > Test Equipment
Sniffing the Rigol's internal I2C bus
ted572:
DG4000 Calibration Restoration:
I just finished calibrating my DG4000 for Channel 1 and 2, and the frequency response is flat up to 200 MHz and well within +/- 0.8 dB.
I very tediously calibrated channel 1 and recorded all the levels and frequencies for each of the 60 steps for HFLAT Cal.
And HFLAT is the only calibration routine that I did.
When I got done and checked channel 1 the response was great as noted above. But, I said to myself - WT*. Why? Because in going through the routine I never saw any frequency above 65 MHz, and therefore I never changed changed any of the levels.
So what is calibration? I have concluded that it is removing the un-calibration that you end up with after you install the firmware patch to extend the frequency! That's right. . . Now is that unbelievable, or not.
So to calibrate (or rather restore the previous calibration of) your DG4000:
Press - Utility, Test/Cal, Secure Code, (put in PW) 2010, Enter, Secure OFF, (the result should be) Secure ON, Access gained.
Then for Cal. select HFLAT, Call Point (start at HFLAT 1-1), Measure Value, Input Value, press Save and wait for it to complete (about 3 seconds), select Cal Point for the next step. Repeat for all 60 steps. Then your done and you didn't have to make measurements or level changes. You didn't even have to hook anything up to your DG4000 except for AC power. Hi
Repeat for the remaining channel.
Cheers, Ted
g***!:
--- Quote from: Bugware on December 06, 2013, 05:00:03 pm ---
--- Quote from: g***! on December 06, 2013, 04:11:46 pm ---The model number is still DS2202 (not A), all keys still install/uninstall OK, but I forgot to try going back to a previous FW...Will do that now and report back!
Update: Tried downgrading FW....not working...OOPs
--- End quote ---
So you got a DS2202 with a new Firmware 00.02.01.00.03, right?
What are the FPGA version (SPU, WPU, CCU, MCU)? Any changes?
--- End quote ---
SPU 03.01.09
WPU 00.07.01
CCU 12.29.00
MCU 02.12
I think there has been changes, but I dont have a record of the origional data.
The SCPI command no longer switches in the 50 Ohm termination :--
Bugware:
--- Quote from: g***! on December 06, 2013, 05:16:51 pm ---
...
SPU 03.01.09
WPU 00.07.01
CCU 12.29.00
MCU 02.12
I think there has been changes, but I dont have a record of the origional data.
--- End quote ---
Cool, thanx. :-+
I think only the SPU and WPU were changed.
neslekkim:
does it exist any windows program to take apart the GEL files?
marmad:
--- Quote from: g***! on December 06, 2013, 04:11:46 pm ---The model number is still DS2202 (not A), all keys still install/uninstall OK, but I forgot to try going back to a previous FW...Will do that now and report back!
Update: Tried downgrading FW....not working...OOPs
--- End quote ---
I didn't have any problems downgrading again - but I did have some problems when running the new FW version on my DS2000.
I had a few complete hangs - some of which I was able to clear by re-booting - and the final one I couldn't get rid of (the DSO would be frozen even after booting) until I downgraded. It's clear the "saved" selections for each menu item (that have more than 2 settings) get out-of-whack and can cause problems. You have to cycle through menu selections to get a feature to operate correctly sometimes.
According to Drieg, they've changed the structure of unit settings stored in FRAM memory - and he mentioned these hints for the update process:
- use boot method to flash it
- you may experience the unit will hang up in splash screen (RIGOL logo) - reseting FRAM to default will help: keep pressing left menu key F6 (sixth)
- load default settings
I couldn't get my DSO to stop hanging by using the F6 method - so I downgraded. But perhaps the best thing (for non-A owners) is to follow these steps:
1) Before upgrading - set 'Default' for System->Power On
2) Upgrade via boot method
3) During first boot up after upgrade, hold in left-menu F6 (sixth gray button) during the boot
Maybe this will prevent hang-ups while running the FW.
More info about any improvements found, bug fixes, or new bugs added since v.01.01.00.02 will be posted over in the DS2000 thread.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version