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(4th question): --<br>
<br>
If multiple Mercury boards are to be used some jumpers on the
boards must be set. These identify which Mercury is #1, etc. If
multiple receivers on a single Mercury are to be used, no jumper
changes are needed. (See info on diversity setup)<br>
<br>
(from USB_protocol_V1.36.doc) --<br>
<br>
The low order bit of c0 (the MOX bit) switches the radio to Tx if
the bit is 1.<br>
If you click the "MOX" button on PowerSDR or KISS Konsole, that
program sets this bit, which controls the T/R relay.<br>
<br>
If C0 is (binary) 0000 001x, the content of c1, c2, c3, c4 specifies
the frequency for Penelope, PennyLane and (future) Apollo ATU.<br>
<br>
if c0 is 0000 010x, c1,c2,c3,c4 specifies the frequency (in Hz) for
receiver 1 (numbering starts with 1)<br>
similarly<br>
c0<br>
0000 011x receiver 2<br>
0000 100x receiver 3<br>
0000 101x receiver 4<br>
<br>
(While this document shows that there are provisions in the PC to
HPSDR data protocol for more receivers (up to 7), there is no
Mercury firmware that supports more than 4 receivers. The Mercury
FPGA usage is near 100%, so, unless there's a major change in
algorithm and re-writing, 4 will remain the upper limit.<br>
<br>
When using more than one receiver on a single Mercury, when c0 =
0000 000x, in c4, the 3 bits indicated by "rrr" xxrr rxxx should
be set as follows: 000 means one receiver, 001 means two recevers,
etc<br>
<br>
73, <br>
Dave<br>
wa8ywq<br>
<br>
<br>
On 3/17/2012 8:13 AM, Erik Anderson wrote:
<blockquote
cite="mid:CAAeZAZ7qxAHDOkeWpHbZofvfSiXtnr=Kr-WPodrSOmW1D3ZmfA@mail.gmail.com"
type="cite">
<pre wrap="">***** High Performance Software Defined Radio Discussion List *****
</pre>
<br>
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<br>
I've been going over the protocol spec for a little while now
(there's an awful lot of stuff in here) and there are a few
questions I could use some clarification on:
<div><br>
</div>
<div>(*) What is MOX?</div>
<div><br>
</div>
<div>(*) How do I interrogate the CC bits (for autodetection
purposes) without actually fully turning the radio on? I'm
assuming that it's inherently impossible to do this (unless
[00]C1[67]=00 has any meaning), in which case I'm curious as to
whether there is a neutral configuration that I can send that
would work in all cases so I can turn it on long enough to get
the CC codes (i.e. without unnecessary clicking, alex filter
swaps, conflict with custom clock rewriting, blowing out the
ADC, etc)</div>
<div><br>
</div>
<div>(*) Should the PC reset its sending sequence number on every
EFFE04 command? The documentation makes multiple references to
"start" and "stop" commands, although after sending an EFFE0401
command, there is no really clear indication as to whether
EFFE0402 is a "stop" or a "start" command (it's both). Am I
resetting only when the board is going completely idle (i.e.
only after EFFE0400)?</div>
<div><br>
</div>
<div>(*) (I'm fairly sure this one has come up often enough to be
on a FAQ somewhere) I remember reading that the current mercury
firmware now supports 4 receivers on the stable branch. However
the protocol makes no distinction between receivers and boards,
permitting you to receive from up to 4 receivers and set the
frequency on up to 7. How does one specify which board each
receiver is assigned to?</div>
<br>
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<br>
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