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Erik, Your latest video on the comparison of a Siglent and Tiny SA is most interesting and informative. It is truly amazing that such a low cost instrument can perform as well, or exceed the performance of a much more expensive one. You might be interested in the following test:

Much of my work is in the Cable Television industry (75 ohm systems) with broadband data carriers, namely 256QAM, 6MHz wide. For field work the typical instrument is the Signal Level Meter which measures at a single voltage level point within? the data band and corrects for bandwidth etc. to arrive at the carrier level (in dBmV) for the broadband data signal. Obviously, The measurement point, automatically set by the meter programming, can have some total power error depending on carrier flatness, rolloff etc. The most accurate method to measure these carriers is using the channel power function on an SA as it accounts for the power over the occupied carrier band.. I did a quick comparison of three spectrum analyzers measuring channel power of? a broadband 495MHz data carrier on an HP 8593A; Rigol 815, and the Tiny SA using identical settings (except for slight RBW differences in the auto set up of the SA). As you can see from the attached document, the comparisons are very close, I suspect differing do to Channel Power algorithms used for the calculations.? It is even more amazing that, for the price of the TinySA, accuracy can be so close on more sophisticated measurements such as these. Also, on a -30dBm calibrated CW 100MHz carrier, the three instruments measured: HP 8593 E = -30.51 dBm; Rigol = -30.5 dBm, and Tiny SA = -30.4 dBm.?

As others have said: GREAT JOB!! Now all we need are some further improvements (i.e. larger screen, wider bandwidth etc.) to make this an even better instrument and value!

Ted (KD7AQO)

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From: "Erik Kaashoek"
To: [email protected]
Cc:
Sent: Saturday July 24 2021 5:28:27AM
Subject: [tinysa] New video: tinySA versus SIglent SSA3021X+

A direct comparison of a tinySA and a Siglent SSA3021X+ while measuring signal levels and harmonics.
Various aspects of level measurements are explained and demonstrated

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For more info on the tinySA go to