-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
radio.biz] On Behalf Of Stig Rasmussen
Sent: Wednesday, August 30, 2006 5:37 PM
To: FlexRadio@flex-radio.biz
Subject: [Flexradio] Receiver calibration / ATU question
Hello folks,
I'm rather new with an 1,5
Hello folks,
I'm rather new with an 1,5 week old SDR-1k. I'm using this on different
computers,
but with the same Firebox.
Do I need to calibrate it on every machine? (If i want correct meter
readings.)
Or is it ok just to copy the database file, after calibrating on one of the
computers?
An
-radio.biz
Subject: [Flexradio] Receiver calibration / ATU question
Hello folks,
I'm rather new with an 1,5 week old SDR-1k. I'm using this on different
computers, but with the same Firebox.
Do I need to calibrate it on every machine? (If i want correct meter
readings.)
Tim You need to run
to work well.
Eric Wachsmann
FlexRadio Systems
-Original Message-
From: Steve Nance [mailto:[EMAIL PROTECTED]
Sent: Monday, March 27, 2006 6:28 PM
To: [EMAIL PROTECTED]; 'Bob Tracy'; 'FlexRadio Reflector'
Subject: RE: [Flexradio] Receiver calibration
Eric,
Just tried your new Level
Thanks...
-Original Message-
From: Eric Wachsmann - FlexRadio [mailto:[EMAIL PROTECTED]
Sent: Tuesday, March 28, 2006 9:30 AM
To: 'Steve Nance'; 'Bob Tracy'; 'FlexRadio Reflector'
Subject: RE: [Flexradio] Receiver calibration
The image calibration routine still works here (HP8640B
, 2006 8:43 AM
To: FlexRadio Reflector
Subject: [Flexradio] Receiver calibration
I calibrated my receiver this morning using Preview 19. Using an XG-1
calibrator, I get a calibrated level of -71.5 dBm for 50 uV input. I
went
back to Preview 18 and it calibrated at -73 dBm for the same input
Wachsmann -
FlexRadio
Sent: Monday, March 27, 2006 2:33 PM
To: 'Bob Tracy'; 'FlexRadio Reflector'
Subject: Re: [Flexradio] Receiver calibration
We rewrote the leveling algorithm this morning and it is as solid as ever.
Those with SVN should try it out and comment.
Eric Wachsmann
FlexRadio Systems
Hi all,
I repeated the calibration tests again on preview 19. The results are:
If I disable the polyphase FFT off, the signal level, as indicated in
the RX meter reads -33.0 dBm, but the reading under the spectrum display
reads exactly -37.0, i.e. the calibration value.
Enabling polyphase
Steve:
Thanks for your note. Glad it is working. We did a complete rework of
the meters and all sorts of similar clean up and as usual, there were a
few impedance matching problems!
Bob
Steve Nance wrote:
Eric,
Just tried your new Level Calibration routine and it worked fine. Like the
I calibrated my receiver this morning using Preview 19. Using an XG-1
calibrator, I get a calibrated level of -71.5 dBm for 50 uV input. I went
back to Preview 18 and it calibrated at -73 dBm for the same input. Wonder
if anyone else has noticed this?
73,
Bob, K5KDN
At 06:43 AM 3/26/2006, Bob Tracy wrote:
I calibrated my receiver this morning using Preview 19. Using an XG-1
calibrator, I get a calibrated level of -71.5 dBm for 50 uV input. I went
back to Preview 18 and it calibrated at -73 dBm for the same input. Wonder
if anyone else has noticed this?
I calibrated mine last night on preview 19 and I got
68.9
73 W9OY
__
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I don't understand this. You are putting some signal in the radio and
telling it that this signal level will henceforth be called -73dBm. It
should matter what level it is, you are arbitrarily calling it -73dBm
and to the extent that it really is - 73dBm, the meter and the noise
floor in
I calibrated my receiver using Preview 19. Using an XG-1.
No problem, -73.3dBm and 107.8dBm.
My opinion, this fine.
SDR1k 1W + Home Made PA PowerSDR v1.4.5b19
Celeron 2.9GHz, Delta44, WinXP Pro SP2
--
Sergey RW3PS mailto:[EMAIL PROTECTED]
I calibrated my receiver this morning
Do svedanya Sergei!
What we are thinking is that there may be other settings which can
interfere with calibration. If there are these settings (polyphase,
average meter, average spectrum, ???) we need to know what they are
so we can turn them off automatically when calibrating and later
Bob,
Just calibrated Preview 19 here using XG-1. Calibrated as expected (-73dBm)
with polyphase, avg meter and avg spectrum all on.
73 de Joe - AB1DO
Robert McGwier wrote:
Do svedanya Sergei!
What we are thinking is that there may be other settings which can
interfere with calibration.
I also performed a new rcv calibration on preview 19 using a 10 Mhz -37
dBm signal source (a measured +3.0 dBm signal and a 40 dB pad).
The signal meter indicates the following values :
preamp off = -35.4 dBm
preamp low = -35.9 dBm
preamp med = -35.3 dBm
preamp high = -35.9 dBm
The
I also performed a new rcv calibration on preview 19 using a 10 Mhz -37
dBm signal source (a measured +3.0 dBm signal and a 40 dB pad).
The signal meter indicates the following values :
preamp off = -35.4 dBm
preamp low = -35.9 dBm
preamp med = -35.3 dBm
preamp high = -35.9 dBm
The
I did it several times on each version, in the same sequence, I think.
The preview 15 values still were 0.6 dB off.
I´ll repeat everything tomorrow (now almost 03 am here). Also I´ll turn
polyphase and other things off. What amazes to me is why I say -37
(been this the right value or not),
19 matches
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