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Siglent SDG6000X series 200-500 MHz AWG's

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gammaburst:

--- Quote from: mawyatt on October 06, 2023, 03:50:11 pm ---Do you have any references where this IMD reduction occurred with the use of the SA mentioned above?

--- End quote ---

Not sure to whom you're speaking there. I don't understand the question, so maybe not to me.

My SDG6022X has firmware 36R8 and hardware 03-00-00-78-38.

Just for fun, here's a screen capture (via GPIB) of my old R3265M SA (circa 1991). I performed a self-calibration a couple hours ago - not much change. The SDG6022X (liberated) is set to -30dBm (both channels) with Wave Combine enabled, and CH1 simply plugged into the SA through a DC blocking capacitor.

You fellows mentioned -6 dBm so I've attached that screen capture too. Looks like about -73 dBc.
I dialed-in some extra SA attenuation so the stronger signal doesn't hit the SA's first mixer too hard (distortion).

mawyatt:

--- Quote from: gammaburst on October 06, 2023, 08:32:15 pm ---
--- Quote from: mawyatt on October 06, 2023, 03:50:11 pm ---Do you have any references where this IMD reduction occurred with the use of the SA mentioned above?

--- End quote ---

Not sure to whom you're speaking there. I don't understand the question, so maybe not to me.

My SDG6022X has firmware 36R8 and hardware 03-00-00-78-38.

--- End quote ---

That was for Performa01 wrt to the reduction in IMD with signal amplitude increase which we were interested with (see "...." below), sorry for the confusion.

"Long ago we spent considerable time and $ looking into analog channels to achieve such, this was for some very specific applications. We did develop a broadband channel that exhibited a somewhat unique property, where the signal of interest odd harmonics experienced a sort of "suck out" phenomena in the classic sweep of input amplitude power and plotting the fundamental and harmonics on a power scale (dBm). The general idea was to place the input signal level utilizing AGC to place the conditioned signal within the region of the odd harmonic null, thus removing/reducing such over a wide-band without the need for tunable filters. The odd harmonic "null" looked more like a notch filter with the input power sweep.

Don't want to detract from this thread but could post something about these unique non-linear amps if folks are interested, from what I can remember from way back ???"

BTW, appears your results are slightly better :-+

Best,
 

Performa01:
Since distortions are highly dependent of signal levels, I thought I’d take advantage on my precision step attenuator in order to measure distortion performance of my SDG6052X at various output levels while still keeping the input level to the spectrum analyzer the same -30 dBm all the time. Of course I’ve checked my SA first – it doesn’t generate any distortion products relevant for this measurement itself; that means, the relative levels of the distortion products were the same for all input levels from -30 to -50 dBm for instance.

I have tested all output levels before and after the click of an internal relay when stepping through the range from -30 dBm to +10 dBm in 1 dB increments. By this, I noticed a curious behavior as can be seen in the table below: At some spots, there is a relay action every other step, such as -13 to -14, and then again -15 to -16 dBm, but then there are also areas like +2 to -5 dBm without any relay action.

The test has been performed at 100 MHz.

Output  IMD
 [dBm]  [dBc]
---------------
   -30  -71.5
   -29  -74.0
   -24  -71.9
   -23  -70.9
   -22  -71.2
   -21  -74.9
   -16  -69.6
   -15  -68.5
   -14  -68.1
   -13  -75.9
   -08  -62.5
   -07  -61.4
   -06  -60.6
   -05  -59.2
   +02  -54.1
   +03  -53.6
   +08  -48.8
   +09  -48.3
   +10  -48.2

As we can see, my SDG6052X has a sweet spot (-75:9 dBc) at -13 dBm output, see first screenshot.

SDG6052X_Int_100MHz_-13dBm

At -14 dBm, the distortion rises significantly to -68.1 dBc; Yet it shows a lot less higher order distortion products in comparison:

SDG6052X_Int_100MHz_-14dBm

Martin72:

--- Quote from: Martin72 on October 05, 2023, 07:52:29 pm ---@Performa01:

Thank you for the cable hint, I need to make some cables for my SML01.
The two 20dB attenuators and the combiner from mini circuits I´ve ordered now from mouser (It seems that mini circuits accept only credit card, I don´t have one.), should arrive in the next week.

--- End quote ---

Already arrived...looks like good quality.

boolhead:

--- Quote from: tv84 on September 01, 2023, 02:48:09 pm ---
--- Quote from: mathstudi on September 01, 2023, 02:34:19 pm --- I wonder if there will be a successor in the near future.

--- End quote ---

https://www.siglenteu.com/waveform-generators/sdg7000a-arbitrary-waveform-generator/

--- End quote ---


SDG6012X-E 160MHz version running firmware 36R8:
Hi tv84, can not telnet to 10101 with telnet_sdg6000.ads, does this ads file not support SDG6012X-E :-//?

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