Rigol DG4062 Function/Arbitary waveform generator teardown

[chrome]

Measuring a rubidium reference using the DG4062 counter mode reads 9.999 999 478 MHz, so about 0.05ppm out - not bad, and looks like the osc is at least calibrated and probably temp compensated.

Did you leave that running for a while or was this a one time measurement?

[mikeselectricstuff]

Was pretty stable over about 10 minutes

[eSaloooo]

yes, i guess it must be a VCTXCO~

[stupid]

I can't watch the youtube,who can tell me what's the DAC of DG4062, I doubt it‘s AD9778,Dual 14-Bit, 1.0 GSPS D/A Converter,like AD9739 of Agilent 81160 in Dave's teardown.

[mikeselectricstuff]

I can't watch the youtube,who can tell me what's the DAC of DG4062, I doubt it‘s AD9778,Dual 14-Bit, 1.0 GSPS D/A Converter,like AD9739 of Agilent 81160 in Dave's teardown.

AD9781

[eSaloooo]

I can't watch the youtube,who can tell me what's the DAC of DG4062, I doubt it‘s AD9778,Dual 14-Bit, 1.0 GSPS D/A Converter,like AD9739 of Agilent 81160 in Dave's teardown.

Hi,stupid maybe you're in china , here is the way to watch the video:

http://f-2-1-o-9-o.ccnn.info/x999/browse.php?u=mmklUp%2FgA2W0FzB%2FoEbJcZqmDUU5eTyB0yYkOJkzYkUzVzXl%2F0E%3D&b=29

[Wim13]

Does anyone knows the real dimensions of the DG4062..

In the brochure  it is 313 mm wide and 160 mm high,
in the manual it is 440 mm wide and 218 mm high,

are there different models around...?

[Sparky]

Does anyone knows the real dimensions of the DG4062..

In the brochure  it is 313 mm wide and 160 mm high,
in the manual it is 440 mm wide and 218 mm high,

are there different models around...?

Just checked -- DG4062 is: 313 mm wide x 160 mm high.  (I don't believe there are different world models, but I'm in NA if it helps.)

[Herman]

Siglent launched the SDG5000 series, and the parameter is better than DG4000.
Someone used it? How about it?
I used the SDG1000, it's very good.
I think the SDG5000 will not let me down.

[marmad]

Learning about the unimplemented buttons/features on the DS2000 got me curious about the DG4000 series - and sure enough, while re-watching Mike's video, it's clear there are 3 unused button positions (2 with illumination) on the keypad PCB (and the corresponding knockouts in the front panel):





Edit: Whoops - Chrome crashed while posting that, and lost an image temporarily. 

[EV]

Learning about the unimplemented buttons/features on the DS2000 got me curious about the DG4000 series - and sure enough, while re-watching Mike's video, it's clear there are 3 unused button positions (2 with illumination) on the keypad PCB (and the corresponding knockouts in the front panel):

Interesting, what is coming there?   

[marmad]

Interesting, what is coming there?   

Well, judging by the button positions, one would likely be another mode (after MOD, SWEEP, BURST) - but not sure about the other 2 close to the CH selects - perhaps some kind of CH combinations?

[jpb]

Learning about the unimplemented buttons/features on the DS2000 got me curious about the DG4000 series - and sure enough, while re-watching Mike's video, it's clear there are 3 unused button positions (2 with illumination) on the keypad PCB (and the corresponding knockouts in the front panel):

Interesting, what is coming there?   

They might just lay out complete grids of buttons as it is simpler and gives them the potential for future expansion without there being any specific plans.

It's hard to know what they might add as they already have a frequency counter and two channels unless it is something to generate binary patterns or signals.

[marmad]

They might just lay out complete grids of buttons as it is simpler and gives them the potential for future expansion without there being any specific plans.

I don't agree with that - considering that just two of the three buttons are illuminated (edit: and the knockouts in the front panel) tends to make me think they had/have plans. Now whether they decided NOT to implement something - or ever will in the future (regardless of plans) - is a different story.

[KedasProbe]

The keyboard version (in system info) is 4.01 so they did change it probably more than expected while the hardware version is 1.01

[jpb]

I was just looking at the User Manual for the Agilent 33250A:

http://cp.literature.agilent.com/litweb/pdf/33250-90002.pdf

in particular the block diagram on page 304 and it struck me that the Rigol DG4000 series is based on this. The Agilent design dates from 2003/4 and gives quite a lot
of details so it is likely that it would form a template.

The three relays per channel in the teardown that appear to be attenuators are probably two attenuators and perhaps a gain switch on the output amp (going from 20dB to 0dB).

The specs are also similar in format so I suspect that perhaps the pulse and square waves are generated from sine waves and a comparator in the same way which is why
they have different rise times to the arb output see pages 300 and 301. The Agilent design does this above 2MHz whilst I guess the Rigol, if it does it, switches it in at 5MHz because
the specs give a change in jitter at that frequency. I've not looked at the teardown again to see if any of this is likely from the circuit, but the specs seem to be in accord.

Edit : on further thought, it would appear that they use Arb for the pulses at least which can't be frequency swept. For square waves it is puzzling because if they use Arb in the same way why do the different models have different rise times? They can't build them into the arb shape otherwise they would change with frequency and square waves can be frequency swept.