Products > Test Equipment

Upcoming Rigol DSG815/830

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tv84:

--- Quote from: chicken on July 09, 2020, 09:48:55 pm ---Looks like I got a different version of the firmware file. For example the size of DoryApplication.sim is 0x2b7be4 in mine.

--- End quote ---

Chicken, I've placed renewed parsings in the previous msg. 

Check to see if you have a different FW from the ones I have. If yes, I would be interested in getting that one also.


--- Quote from: chicken on July 09, 2020, 06:34:43 pm ---I wasn't aware of that thread. The only difference is :SYSTem:PRESet (620, 0x4016cdd8, :SYSTem:PRESet, Programming Guide) which is missing in your list.

--- End quote ---

Thanks, this allowed me to correct a rare bug. You could correct your command IDs. It's not the int16 that you assumed (see my list).

chicken:

--- Quote from: tv84 on July 12, 2020, 04:29:30 pm ---Chicken, I've placed renewed parsings in the previous msg. 

Check to see if you have a different FW from the ones I have. If yes, I would be interested in getting that one also.

--- End quote ---

Judging from offset and size of DoryApplication.sim, your 00.01.06.00.01 FW file is the same as mine.


--- Quote from: tv84 on July 12, 2020, 04:29:30 pm ---Thanks, this allowed me to correct a rare bug. You could correct your command IDs. It's not the int16 that you assumed (see my list).

--- End quote ---

Are you referring to the ID column in my list? It's the index of the SCPI command structure in the command tree array, not the int16 field that references the array of function pointers. IIRC there are "inert" entries to build the hierarchy. But I agree, your numbering based on function index makes more sense.

tv84:

--- Quote from: chicken on July 09, 2020, 06:09:47 pm ---PS: And here my notes about loading extracted firmware binaries with Ghidra and radare2

--- End quote ---

A practical way that I use to load a IAR file in IDA Pro is using 0x3FFFFF94 as the loading address (attached).

Sighound36:
Norepy

From this thread I take you have have bot the Rigol and Siglent offerings on test currently, so what are you conclusions thus far or is the jury still out?

noreply:

--- Quote from: Sighound36 on July 13, 2020, 12:40:56 pm ---Norepy

From this thread I take you have have bot the Rigol and Siglent offerings on test currently, so what are you conclusions thus far or is the jury still out?

--- End quote ---

Currently only the 815 - no stock on the Siglent when review started - but should be getting the Siglent shortly.

So far, I like the 815 - it 'does what's written on the tin' as the saying goes.

I have been using this for testing RF power amplifiers (as input source) and the signal(s) are extremely clean out of the RF Amplifier(s).

As you know, if you put 'crap' into an Amplifier - it WILL amplify your 'crap' - given that there are absolutely clean signal(s) out of the Amp is a good indication.

I would like a 'touch screen' (spoiled by the SVA and MSO5000) - but the 815 has a functional system - it takes a while to get used to the menu structure - but its possible to make all the setting you need - but sometimes many key presses.

I like the compact size - big bonus - can bring very close to DUT and have 'short' leads.

The 815 'looks' dated , I think it was loosely based on the R&S SM300 from a form factor point of view - a tribute to R&S - as their device was last revised in 2007 - and it still has better specs than Rigol and the Siglent offerings.

What I noticed, is  that there is no Square Wave output on the 815 - other than on the LF output (BNC) and only up to 20KHz.

Not sure if its same on the Siglent at this moment in time?

I can understand that there is no great desire for Square Waves when working with RF (and a digital DAC based signal generator can suffice at a much lower cost) but in my 'one off' case , I was looking for a ULTRA FAST  edge in a signal - I guess this is where the 'pulse mode' comes into play. This is my next area of testing , so will report soon.

On the 815, this is an option (I think the Siglent has this feature as standard offering - correct me if wrong) so at the moment its on 'trial' mode until time runs out.

Modulation works well on the 815, I have been able to successfully modulate FM carrier(s) with various tones and soon full Stereo Encoding with RDS - to check all the pilot frequencies in receiver tests.

I am hoping to do a 'full report' - side by side of the main features from a user's perspective - as soon as I get the Siglent unit and do some similar testing which I made with the 815.

My only negative for the 815 at this moment is that there is no 'hack' to enhance the device - because if it can be enhanced to the 3.6GHz variant - it will kill the Siglent from a price / performance - without a doubt!

Let's face it, most people here don't want to shell out big $$$ on an option which is already 'inside' the device you purchased - just awaiting an activation code?

This is why I think 'hackability' is a big factor when deciding to purchase.

At the moment the score is ;-

DSG815 = 0
SSG3021Z=1

BUT, if and when DSG815=1 - the Siglent will have to drop its price by a mile as the price / performance ratio of the Rigol will kill it for sure.

Like most RF Signal Generator customers TODAY, having a device limited to 1.5GHz is a deal breaker - unless you are ONLY going to be working within this frequency limit.

With 2.4GHz, 5GHz and even higher RF devices being the norm today - you really need to have the higher frequency capability - especially if you are going to drop >$3000 for a RF Signal Generator.

This makes me think that even the Rigol's 3.6GHz  and Siglent's 3.2GHz offerings are already dated.

But, and a big BUT, there are already RF Signal Generators which cover the higher frequencies and modern digital modulation protocols out on the market but  unfortunately they cost lots of $$$.

This is why for the majority of 'us' its the Rigol and Siglent offerings (even if dated) that are really affordable at the moment.

From a price performance point of view , Rigol and Siglent will always be behind the Agilent and R&S offerings - which will be beyond the budget of most people like myself (and possibly others in this forum) - and because Rigol and Siglent choose to be in this market sector we can benefit by having an affordable access to instruments which can be 'enhanced' to make them even more desirable for the price / performance they offer.



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