uSDX+ | 8 Band SDR | SSB/CW QRP All Mode HAM Transceiver | Output Spectrum measurement | Tek 495P

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uSDR uSDX+ Plus V2 Review 10/15/17/20/30/40/60/80m 8 Band SDR All Mode HF SSB QRP Transceiver + 4000mAh Battery

Hello Guys, thanks for tuning in to my channel!
Spectral purity check: This is an output power and spectrum measurement of the new 2nd version of the Chinese uSDX-plus - labelled as uSDX+ SOFTWARE DEFINED RADIO.
There are a few hardware and FW issues - as explained in the video.
It's probably a budget friendly trx for SOTA, POTA, or any other portable activities.
Please check out the original work of DL2MAN

Spectral Purity measurement - done with a supply of 13.8V DC, and 50 Ohm (50W) dummy load . Current was not measured.

Frequency | Power o/p | Reference (dBm) | Harmonics (dBm)
3.7MHz 3.9W -11.6dBm -50.4dBm
5.3MHz 4.9W -7.6dBm -50dBm
7.1MHz 5.1W -5.1dBm -51.2dBm -47.6dBm
10.136MHz 4.3W -3.2dBm -46.4dBm -48.4dBm
14.074MHz 5.1W 0.8dBm -40.4dBm -39.6dBm
18.1MHz 3.9W -0.8dBm -44(spur)dBm -38.4dBm
21.074MHz 5.3W -5.6dBm -54dBm -47.2dBm
28.074 4.5W -4.4dBm -48.2(spur)dBm -52dBm