I'm talking about feeding detected audio to the computer for decoding.
And not all digital formats are the same -- going from one to another
takes time and processor power, and, depending on how data is encoded,
may be problematic.
73, Jim K9YC
On 7/12/2019 12:49 PM, Andy Durbin wrote:
"The
"The spec that matters is the linearity of the A/D at the extremes of the
dynamic range."
Jim,
A bit more information please. Are you talking about TX or RX? Are you
talking about the A/D that is typically in the TX path between the CODEC and
DSP of a modern transceiver or perhaps an A/D
To put this in context, WSJT-X works at 16-bit 48 kHz. The spec that
matters is the linearity of the A/D at the extremes of the dynamic range.
73, Jim K9YC
On 7/12/2019 8:02 AM, Andy Durbin wrote:
"It was interesting to see that the shared data sheet shows even the latest version
of the
"It was interesting to see that the shared data sheet shows even the latest
version of the PCM2903 is not recommended for new designs"
Well, the PCM2903C seems to be the latest version of the PCM2903 and it does
not have the NRND designation. The PCM2901 datasheet reference to PCM2903E is
"The TI PCM2901, I am told by a Watsonville rep, was used in the K3-S."
Thanks.
The PCM2901 and PCM2903 appear to be be very similar. The only obvious
difference I found is in support of S/PDIF. It was interesting to see that the
shared data sheet shows even the latest version of the PCM2903
Andy: In answer to your two questions:
The TI PCM2901, I am told by a Watsonville rep, was used in the K3-S.
Whether it was used in early production runs, or used in later production
runs, I do not know. It comes in two versions: Model E and Model EG4. The
data sheet and other specs can be
"Perhaps it will be the same as the carefully chosen TI chip used in the K3-S"
What is the part number of that carefully chosen TI chip? Various versions of
the PCM2903 are used in amateur radio equipment. Did Elecraft use something
better in the K3S?
73,
Andy, k3wyc
If available at this early stage, any specs on the upcoming K4 sound card,
or likewise, its internal chip model number, would be of interest here.
Perhaps it will be the same as the carefully chosen TI chip used in the
K3-S. Thank you.
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