Monitor audio in the 6700 vs 5000

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  • Updated 6 years ago
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In the Flex 5000 with 2nd rx it looked like a -80dbc pad from the rf driver to the PA being relay switched to the RX1 input if monitor was selected in TX mode. This seems to indicate that I actually monitored "demod'" audio as would be transmitted within the RX/TX filter boundaries. Is there a similar path with the 6xxx series or is the monitor just a simple pick off from a codec output of post eq/comp and not an actual "demod" from a receiver? Not worried about latency.
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K4EAR

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Posted 6 years ago

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Ken - NM9P

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If this is not the standard mode of monitor, can it be done this way with one of the slices on either the 6700 or 6500 for a few tests?

My assumption is that it might be possible with the 6700 but not the 6500 due to two SCU's in the 6700. How far off am I?
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Eric - KE5DTO, Official Rep

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Official Response
The simple answer is that we have both in the 6000 series hardware -- we have both the return path within the codec that lets you listen to your input audio + processing with minimal latency (this is enabled with the MON button) AND a hardware path that allows us to connect the transmitter to a receiver via a pad (not currently used in SmartSDR for Windows). Note that we use the latter in production test to verify the radio performance.
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Ken - NM9P

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Neat! Is this going to be incorporated in both 6700 and 6500 in a later release of PSDR?
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Eric - KE5DTO, Official Rep

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I don't know of any immediate plans to incorporate this into the client. We would certainly entertain ideas about this though.
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K4EAR

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This inclusion would allow separate software monitoring off the accessory port for RTA monitoring and TX audio tweaking without a 2nd receiver. My vote.