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Reading the S-Meter on Two Slices
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Paul Casper
Member
I am trying to read the S-Meter from two slices on RXA. I am using the two CAT commands below:
ZZSM0
ZZSM1
ZZSM0 reads slice A just fine, but ZZSM1 seems to also read slice A instead of slice B.. I am trying to approximate the (S+N/N) by reading the S-meter on slice A (signal+noise) and the noise floor from slice B (noise) on a nearby clear frequency. My transceiver is the 6700. Can anyone clear up this mystery for me? Thanks in advance.
Paul. K4HKX
ZZSM0
ZZSM1
ZZSM0 reads slice A just fine, but ZZSM1 seems to also read slice A instead of slice B.. I am trying to approximate the (S+N/N) by reading the S-meter on slice A (signal+noise) and the noise floor from slice B (noise) on a nearby clear frequency. My transceiver is the 6700. Can anyone clear up this mystery for me? Thanks in advance.
Paul. K4HKX
0
Answers
-
See the note on the ZZSM command in the SmartSDR CAT manual. It states...
P1 = Slice Receiver Index (0 – 7) Note: Currently limited to RX A0 -
Tim, thank you for your response. I think I was confusing "slice receiver A" with hardware receiver A (SCU-A). Also, it is a bit confusing to label slice receivers A, B, C, etc. on the panadapter, but specify them as 0, 1, 2, etc. in the CAT commands. Anyway, I now understand only the A receiver on the panadapter can be interrogated. Hopefully this will be expanded in the future to other slices.0
-
The Slice A vs Slice B thing versus the API or CAT commands is confusing. SSDR labels the Slices A and B for user consumption, but IIRC this doesn't necessarily correspond to indices 0 and 1 in the API (or, presumably, in the CAT commands). Again assuming I'm remembering correctly, Slice 0 in the API is always present... it's the first slice, even if that slice happens to be labelled Slice B in SSDR (Slice A having been closed). Hence the complexity.
Another one of the Flex API programmers, or Tim, or one of the devs, will hopefully chime-in and correct me if I'm wrong here... but that's how I recall it working.
Peter
K1PGV
0 -
"Hopefully this will be expanded in the future to other slices."
It and other CAT commands will be extended to multiple slices in the upcoming SmartSDR v1.6.x release.0
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