[Premium-Rx] R&S PR100 IQ demodulation mode?

[Clemens Paul]

The PR100 product brochure

http://www.rohde-schwarz.us/file/PR100_bro_en.pdf

on page 20 helps.
Both I/Q data and digital audio are post agc/mgc.
The block diagram also clearly shows that the "digital audio" (with 
12,5kHz BW)
comes out of the demodulator stage and you can choose to convert it by
the internal D/A stage (->loudspeaker) or by an external DAC.
So the digital audio is the result of demodulating the the raw I/Q 
data.
Following the description in the brochure it is one of the following 
types:
AM,FM,USB,LSB,ISB,PULSE,CW.
The brochure says nothing about an "additional IQ mode" in the
demodulator signal path.
As there is ISB available you have to have two independent audio 
channels.


73
Clemens
DL4RAJ


----- Original Message ----- 
From: "David I. Emery" <die at dieconsulting.com>
To: "Matt Blaze" <matt at crypto.com>
Cc: <Premium-Rx at mailman.qth.net>
Sent: Monday, February 20, 2012 12:18 AM
Subject: Re: [Premium-Rx] R&S PR100 IQ demodulation mode?


> On Sun, Feb 19, 2012 at 06:06:17PM -0500, Matt Blaze wrote: >
>
>> I hope that's what's going on here, since that would allow me to
>> recover the actual IQ data from the "demodulated" IQ audio stream / 
>> wav
>> file.  The PR100 wav files are preferable for my purposes to the IQ
>> files, because the PR100 can be configured to pause audio recording 
>> when
>> no signal is over the squelch threshold (but the IQ is recorded
>> continuously, whether a signal is present or not).  This will make
>> capturing and analyzing infrequent signals much easier.
>
> You presumably are also going to run into another issue,
> or more probably NON-issue for that app... Likely the IQ output
> that runs continuously is pre-most-AGC and wideband, likely the
> stereo one is POST AGC and only +-audio-bw (whatever they chose).
> Might make no difference, but depending on the modulation you are
> after it might...
>
>
> -- 
>  Dave Emery N1PRE/AE, die at dieconsulting.com  DIE Consulting, Weston, 
> Mass 02493
> "An empty zombie mind with a forlorn barely readable weatherbeaten
> 'For Rent' sign still vainly flapping outside on the weed encrusted 
> pole - in
> celebration of what could have been, but wasn't and is not to be now 
> either."
>
> ______________________________________________________________
> Premium-Rx mailing list
> Home: http://mailman.qth.net/mailman/listinfo/premium-rx
> Help Page: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Premium-Rx at mailman.qth.net
> Help Contact eMail:  paul at 8zo.com
> Home Page:  http://www.premium-rx.org/
>
>
> -----
> eMail ist virenfrei.
> Von AVG uberpruft - www.avg.de
> Version: 2012.0.1913 / Virendatenbank: 2112/4817 - Ausgabedatum: 
> 18.02.2012
>