[hpsdr] Line Level Input to Penelope?

[Phil Harman]

Hi Tom,

It should be possible to use the line input rather than the mic input on 
Penny by modifying the I2C commands in initiozy11.bat.

Since we are sending mono mic samples then you will only be able to use 
either the left or right line input. Try both since I'm not sure which one 
the code reads.

If you look at the register map for the TLV320VIC23B you will see how to 
select the line input rather than the microphone.. I've not tested this but 
try editing the line with 0x08 0x15  to 0x08 0x10.

73 Phil...VK6APH


----- Original Message ----- 
From: "Tom Cathey" <k1jj at comcast.net>
To: "'OpenHPSDR (open)'" <hpsdr at openhpsdr.org>
Sent: Saturday, January 29, 2011 1:54 PM
Subject: [hpsdr] Line Level Input to Penelope?


> ***** High Performance Software Defined Radio Discussion List *****
>
> Is there a way to drive Penny with a higher level of audio,  like  ~one 
> volt
> line level,  rather than using the low level mic input?  I think line 
> level
> might overload the preamp, just like when we try it with any mic low level
> input.
>
> Some guys like to use outboard audio gear and not depend on the software,
> like me... :-)
>
> Using an attenuator to reduce line level to mic level will only encourage
> noise or hum problems from my experience.
>
> Any solutions?
>
> Tom, K1JJ
>
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