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OWON XSA1032-TG 3.2G Spectrum Analyzer

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TomC:
SSB Phase Noise Test part 2

To setup and execute the test I used the following procedure:

1. Turn on the analyzer and allow it to warmup for at least 30 minutes.
2. Connect the generator to the RF input and set it up to 1GHz Max Pwr.
3. Use the analyzer's Auto-Tune to get a basic display.
4. Change the Detector to Sample, the Display to Ampt Graticule On, the Span to 25kHz, RBW to 1kHz, and turn Average On.
5. Set Marker to Delta 10kHz to place the marker at the 10kHz offset, set Marker Fctn to Marker Noise On to normalize the noise reading to 1Hz.

The Spec calls for "10 kHz < -82 dBc/Hz (Typical)" and as shown by the Step_5_Spectrum attachment we got a -83.15 dB/Hz noise reading. Since in this case the carrier power is pretty close to 0dBm, then I think -83dB/Hz is equivalent to -83dBc/Hz. In fact, since the carrier is actually slightly above 0dBm, it's probably closer to -84dBc/Hz.

The procedure for the 100kHz, and 1MHz offsets is basically the same except for the Span and Delta Marker, which need to be set to larger values. For the attached spectrums I used Span = 250kHz, 2.5MHz, and Delta = 100kHz, 1MHz.

As can be seen, the 10kHz, and 100kHz offsets appear to be within specs. However, the 1MHz offset is slightly off, but in my opinion, not by much.

DaneLaw:
That's quite a sale - if you'r are able to pick them up at 600 bucks..like 1/4 of Wallmarts msrp.  congrats..
cheers, from one envious puppy here  ;D

TomC:
To tell you the truth, when I first saw it, I thought it was some kind of scam. But since Walmart generally stands behind anything bought from their website, I decided to take my chances and order it right away anyway, I didn't even research it. Although, since I own other OWON products (2 DSOs and 2 ARBs), I remembered seeing it on their website while looking for updates.

First I ordered from the vendor with the lowest price, about $425, but that fell thru with the package lost in transit, it never made it out of China. I got my money back and the price had gone up a little, so I ordered again for less than $600 and got my prize this time.

TomC:
Displayed Average Noise Level (DANL) Test part 1

To setup and execute the test I used the following procedure:

1. Turn on the analyzer and allow it to warmup for at least 30 minutes.
2. Connect a 50Ω terminator to the RF input.
3. The steps that follow assume you are starting from the factory preset settings, press Preset if needed.
4. Change the Detector to Sample, the Display to Ampt Graticule On, turn Average On, set Ref Level to -70dBm, set Attenuation to 0dB, the Start Freq to 1MHz, the Stop Freq to 1GHz, and Press Peak (Max Search) to find the noisiest spot in this range.
5. To get better resolution press Mkr→CF, and change Span to 1MHz. Note that the noise reading is lower because RBW & VBW were automatically changed to 10kHz.
6. Set Marker Fctn to Marker Noise On to normalize the noise reading to 1Hz. This is the DANL for PA off: 1MHz to 1GHz, the spec calls for -140 dBm (Typical), <-130 dBm.
7. Turn the Preamplifier to On. This is the DANL for PA on: 1MHz to 1GHz, the spec calls for -160 dBm (Typical), <-150 dBm.

The procedure for the 1GHz to 3.2GHz ranges is basically the same except for the Start and Stop frequencies on step 4. The attachments for steps 4-7 are on the next post.

TomC:
Displayed Average Noise Level (DANL) Test part 2

Here are the attachments for steps 4-7 of the 1GHz to 3.2GHz range.

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