These were my questions Friday based on the published data sheet:
Questions for someone at Flex's Dayton booth:
Except for the most demanding large signal conditions, Slice
Receivers are free to operate in wide-band mode without the need
for RF pre-selection filters.
1. What does most
It will be interesting to hear if the Flex 6000/6700 when used in Europe can
deal with the European 40m BC stations.
Some data.
Over a period of several months when I was in Scotland, I measured the level
of these 40m BC signals with which a receiver must cope. Using a 40m dipole
at 70ft AGL
Well, when Flex starts charging for software updates. That alone will
kill future sales. With all the hype on how great their new lineup is,time will
tell. We all know what is on paper and what happens in the real world can
be completely different. They learned that you need a dedicated
But then, we may be witnessing another change in the evolution of ham radio
where the added value to a rig is in the software and not the hardware. By
licensing their SmartSDR, Flex may be realizing that the key factor separating
them from the other emerging SDRs lies with their software and
On Sat, May 19, 2012 at 11:53 AM, Edward R. Cole kl...@acsalaska.netwrote:
...website now shows the Flex-6000/6700 newest entry into the SDR
market
===
Said to be digital from antenna connector to output. Their hardware has
long needed updating, so perhaps this will be it. However,
The Flex 6000/6700 is an on frequency direct digital conversion
radio - that is a 16 bit analog to digital converter operating at
the front end of the radio with no intermediate conversion/IF
and filtering stages. In addition, all of the DSP is contained
in the radio (no more PowerSRD). The new
decimation counts
On 5/19/2012 7:29 PM, Joe Subich, W4TV wrote:
The issue will be the severely limited dynamic range of the 16 bit
ADC. Without effective AGC ahead of the ADC there *will* be overload
problems on crowded bands (e.g. 160/80/40) where any transceiver must
deal with many
leading edge. Marketing,
you decide.
Hope this isn't too off-topic.
73,
Terry, WB4JFI
-Original Message-
From: Joe Subich, W4TV
Sent: Saturday, May 19, 2012 7:29 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] OT: Dayton New Equipment Show
The Flex 6000/6700 is an on frequency
Decimation can help but it is not a magic bullet that eliminates
the effects of ADC overflow and/or blocking due to gain reduction.
73,
... Joe, W4TV
On 5/19/2012 7:57 PM, Tom Azlin N4ZPT wrote:
decimation counts
On 5/19/2012 7:29 PM, Joe Subich, W4TV wrote:
The issue will be the
Hi Joe,
Guess we will have to await independent testing. The Flex folks seem to
assert they have the equivalent of more than 24 bit when dealing with
adjacent strong signals.
From the Flex reflector...
Just in rough numbers, you get a 1/2-bit for every divide-by-two decimation
you do. If
excessive quantization
error levels.
Mike Alexander - N8MSA
amsct...@comcast.net - Original Message -
From: Joe Subich, W4TV li...@subich.com
To: elecraft@mailman.qth.net
Sent: Saturday, May 19, 2012 7:29:24 PM
Subject: Re: [Elecraft] OT: Dayton New Equipment Show
The Flex 6000/6700
: Dayton New Equipment Show
The Flex 6000/6700 is an on frequency direct digital conversion
radio - that is a 16 bit analog to digital converter operating at
the front end of the radio with no intermediate conversion/IF
and filtering stages. In addition, all of the DSP is contained
in the radio
Guess we will have to await independent testing. The Flex folks seem
to assert they have the equivalent of more than 24 bit when dealing
with adjacent strong signals.
Yes we will need to wait for independent testing but given relatively
wide filters (200 KHz or more), that testing can't be
I believe Joe is trying to say that traditional test methods fall short
of reality when applied to direct sampling SDR receivers, and I would
believe he is correct - there are too many other factors to be
considered (and some of them are yet unknown to most of us).
73,
Don W3FPR
On 5/19/2012
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