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Quick comparison Siglent 3032X-R vs Rigol RSA3030N
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ehoernchen:
The realtime capability comes initially with 25MHz BW on the Siglent and 10MHz on the Rigol.

The two pictures show a WLAN spectrim in the density view on both with 10 MHz Bandwidth.
To look at a complete channel the 25 MHz span comes handy.

On the Rigol you have more options to setup the density display like pallette and density hues.

The Rigol has also more display combinations but it has no 3D display.

Otherwise the function seems quite similar and both offer up to 40MHz Span for Money.

ehoernchen:
Now the VNA function.

First two pictures show the TF of a filter on Siglent and Rigol. I like the split screen of the Rigol. The Siglent seems to need to show both on top of each other.

SigVNA2 and RigVNA2 show that the Siglent seems to have a bit more dynamic range.

Initially also here the Rigol showed some hickup. E.g. the S21 was displayed just to the center frequency and then only max was displayed. (RigVNA3). After restarting it disappeared. But I saw it sporadicly again.

Also the reflection measurement on the Rigol puzzled me (no pictures). With an open connector it showed a S11 close to 0, but I expected close to 1. Is there an external reflection bridge necessary?

That was it on the comparison. I will send one back in the next days.
tautech:

--- Quote from: ehoernchen on September 16, 2023, 08:23:32 am ---The Siglent seems to need to show both on top of each other.

--- End quote ---
Yes, you need View/Stop/Hold a trace then activate another and select the measurement type required.
With the 4 traces available you can have Log Mag, SWR, Phase and a Smith chart each in a different trace color and with common to all markers.
This does get seemingly busy for the inexperienced but to have them all correlated on one display can be useful.

BTW, did you notice for more precise traces/measurements 10001 points can be selected at the expense of greater sweep times. 200 points is the default minimum.
ehoernchen:

--- Quote from: tautech on September 16, 2023, 09:23:23 am ---
--- Quote from: ehoernchen on September 16, 2023, 08:23:32 am ---BTW, did you notice for more precise traces/measurements 10001 points can be selected at the expense of greater sweep times. 200 points is the default minimum.

--- End quote ---
Not sure, is this done by increasing sweeptime?

One other thing which puzzles me on the Siglent is the Reflection measurement. In the doc and on the product webpage it’s listed but I can not find it.

--- End quote ---
tautech:

--- Quote from: ehoernchen on September 17, 2023, 01:57:27 pm ---
--- Quote from: tautech on September 16, 2023, 09:23:23 am ---BTW, did you notice for more precise traces/measurements 10001 points can be selected at the expense of greater sweep times. 200 points is the default minimum.

--- End quote ---
Not sure, is this done by increasing sweeptime?
--- End quote ---
No, an increase in sweep time is the penalty of selecting a large # of datapoints.
You can select the points to suit your particular needs (accuracy vs sweep time) from the Measure menu.


--- Quote ---One other thing which puzzles me on the Siglent is the Reflection measurement. In the doc and on the product webpage it’s listed but I can not find it.
--- End quote ---
Reflection measurements are related to SA mode where an external reflection bridge would be used, typically for instrument isolation from the DUT where bridges themselve offer additional attenuation and where addition pads can more easily be added to attenuate strong signals.

In VNA mode, Port 1 (the Stimulus port) has an inbuilt bridge (not as robust as an external bridge) but very suitable for measurement of passive DUT's, like antennae where reflection measurements tell us what we need of antenna performance and for adjustment, if required.
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