Rob Sherwood has an SDR-1000. He has not hooked it up for testing the
last time he was asked (two day before Dayton). Given Rob's Sherwood's
talk at Dayton, I was asked at the Flex forum to describe the AGC.
Based on my description of our AGC, some tests were run by independent
people but
On 6/8/07, Robert McGwier [EMAIL PROTECTED] wrote:
LONG LIVE OPEN SOURCE. Try getting that out of your Yaesu, ICOM,
Kenwood, Orion, or Elecraft.
Amen to that. I just wish someone had the source converted to Delphi
Pascal ;) Maybe in another life I'll get time to do that...
73
Brian / wa5am
Did Flex get it right? I wonder (besides the 7000) what other radios he is
referring to?
73 Neal
-- Forwarded message --
From: Jan Erik Holm [EMAIL PROTECTED]
Date: Jun 7, 2007 12:16 AM
Subject: [Elecraft] Sherwood Engineering and DSP
To: Elecraft Reflector [EMAIL PROTECTED]
To: FlexRadio@flex-radio.biz
Subject: [Flexradio] Fwd: [Elecraft] Sherwood Engineering and DSP
Did Flex get it right? I wonder (besides the 7000) what other radios
he is referring to?
73 Neal
-- Forwarded message --
From: Jan Erik Holm [EMAIL PROTECTED]
Date: Jun 7, 2007 12:16 AM
PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Neal Campbell
Sent: Thursday, June 07, 2007 10:30 AM
To: FlexRadio@flex-radio.biz
Subject: [Flexradio] Fwd: [Elecraft] Sherwood Engineering and DSP
Did Flex get it right? I wonder (besides the 7000) what other radios
he is referring to?
73 Neal
At 07:29 AM 6/7/2007, Neal Campbell wrote:
Did Flex get it right? I wonder (besides the 7000) what other radios he is
referring to?
Seems that he has two problems:
1) the implementation of the AGC algorithm in commerical radios using
a DSP. It's different than what you'd get with a traditional
:[EMAIL PROTECTED] On Behalf Of Neal Campbell
Sent: Thursday, June 07, 2007 7:30 AM
To: FlexRadio@flex-radio.biz
Subject: [Flexradio] Fwd: [Elecraft] Sherwood Engineering and DSP
Did Flex get it right? I wonder (besides the 7000) what other radios
he is
referring to?
73 Neal
-- Forwarded
, AZ
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Jim Lux
Sent: Thursday, June 07, 2007 9:28 AM
To: Neal Campbell; FlexRadio@flex-radio.biz
Subject: Re: [Flexradio] Fwd: [Elecraft] Sherwood Engineering and DSP
At 07:29 AM 6/7/2007, Neal Campbell
All,
I talked with Rob myself prior to Dayton. A common problem with AGCs is
that the AGC control voltage is developed after the IF filtering. This
limits the AGC response time (on attack, is the issue) due to the narrow
IF bandwidth. When a large RF pulse comes in, its envelope can rise
At 08:44 PM 6/7/2007, K0MV wrote:
All,
The other issue that could be related to the radios with DSP at the IF
stages is attack time. It is not desirable to have too fast of an AGC
attack. The competing design considerations are the dynamic range on
the analog to digital converter and the cost.
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