Since I also own a SDR-1000, I'll reproduce your tests with a dummy
load and will post here the results, but meanwhile you gave me a clue:
It seems to me that the switch noise is the preamp gain relay and it is
caused because you have selected different settings for General band and
ham bands. Look at the preamp settings change when you move across band
boundaries and you hear the click. If you use different folders for
each installation, as I do, your preamp settings may be different on
each version.
73 de Ignacio, EB4APL
---------------------------------------------------------
Dan Scott wrote:
I thought I had this issue resolved but I find that it was not. I'm
wondering if anyone else using (or that used) a SDR-1000 is
experiencing the same issue.
After install 1.18.3 the noise floor increased from less than S1
(dummy load) to S6.5 on 20-meters. The issue seems to be most obvious
on 17, 20, 30 and 40 (to some degree). I thought I had the issue
resolved a couple months ago by uninstalling 1.18.3 and reinstalling
it. But what I had was something that was better but not resolved and
after re-calibration it was obvious the problem still existed.
Considering 1.18.2 as the baseline version and all testing into (or
from) a Dummy Load, the following comparison can be derived:
1.18.2 shows S1 (+/- .5) for the noise across all bands.
1.18.3 shows a noise floor of:
S1 on 10, 12, 15
S6.5 on 17
S7.5 on 20
S6.5 on 30
S2 on 40
S7 on 60
S6.5 on 80
S5.5 on 160
Once a fresh copy of 1.18.3 is installed I step through calibration
procedure starting with PA Settings. After each calibration step, I
would check the noise floor on all the band edges comparing the
in-band to out-of-band noise floor. Generally the noise floor on
20-meters would remain around S3 until doing the RX Image Reject
Calibration. Once the RX Image Reject Cal was complete, 20 should
show a S7 noise floor. I re-calibrated version 1.18.2 and each step
of the way the noise floor remained S1 +/- .5 all bands, so 1.18.2
reacts much better then 1.18.3 when doing an apples-to-apples
comparison.
After reloading the software and re-calibration, the band edges tests
for 17 through 40 would show S1 +/- .5 for out-of-band and a high
noise floor in-band. This condition could easily been seen when
looking at 13.999999 with a S0.5 noise floor and tuning to 14.000000
which shows a S7 noise floor. Also, tuning between in-band and
out-of-band would produce a switching sound in the SDR-1000 on all
bands except 15, 12, and 10 meters.
When using 1.18.2 the above condition does not exist. Therefore when
tuning from 13.999999 to 14.000000 the noise floor remains the same
and the SDR-1000 is not being switched. By "not being switched", I
mean there is no relay sound heard when tuning from out-of-band to
in-band and visa-versa.
The XP Pro system is a quad-core that has been running a couple years
with little change (other than Microsoft trying to mess with me from
time-to-time). It is dedicated to the radio plus one Video Editing
piece of software.
NOTE: Reload process for 1.18.3 is:
1. Uninstall 1.18.3
2. Delete the 1.18.3 directory from Program Files
3. Reboot
4. Install the software for 1.18.3
5. Reboot (I have reverted to 98 procedures... when Microsoft
systems were definitely com-booters)
6. Run pSDR/configure
7. (sometime an extra boot just because it is an MS OS)
Any ideas?
Thanks and 73,
Dan - W0RO
_______________________________________________
FlexRadio Systems Mailing List
FlexRadio@flex-radio.biz
http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/
Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/
Message delivered to arch...@mail-archive.com
