Tim,
I connected my HP 8645 Sig gen directly into the Antenna I/P on my SDR 1000,
and tested it at 14.1 MHz and 50 microvolts with PSDR versions 1.18.6,
2.0.8 and 2.0.16 leaving everything else the same.
I was getting some QRN or QRM static sounds corresponding with the needle
jumping during the last test - There does seem to be a significant
degradation in performance with version 2 of PSDR on my SDR1000.
Note: I have just upgraded my station ground and it is not too bad.
I would be most grateful for any advice from you, Brian, or other flexers,
particularly those with SDR1000s.
The radio sounds much better on V 1.18.6 and earlier versions than it does
on the version 2s, where it is insensitive and there is a "motorboating"
noise in the audio.
Cheers,
Barry VK1BM
PowerSDR V1.18.6
HP 8645 RF Sig Gen
Freq: 14.100 MHz
I/O Level from
Level 50 uV
PSDR Freq 14.1 MHz
AGC - T Full on
Preamp High
PSDR Multimeter -68 dBm
PSDR Signal meter 9 (+5)
BobsSmeter 9 (+5)
------------------------------------------------------------
Observation PSDR and Bob agree on the input levelLeaving the sig gen the
same and switching to PowerSDR v 2.0.8
AGC - T Full on
Preamp High
PSDR Multimeter -95 dBm
PSDR Signal meter 5
BobsSmeter +15 sBover S9
Observation PSDR and Bob agree on the input level
Leaving the sig gen the same and switching to PowerSDR v 2.0.16
AGC - T Full on
Preamp High
PSDR Multimeter -140 fluctuating to -124 dBm
PSDR Signal meter 0(min) jumping to 1 every 2 secs or so
BobsSmeter 9 dB over S9 jumping to +20 every 2 secs or so
Observation QRN static bursts corresponding to meter jumps - weather
effect?
PSDR reads 9dB lower than Bobs
-----Original Message-----
From: Tim Ellison [mailto:telli...@itsco.com]
Sent: Saturday, November 13, 2010 12:18 AM
To: Barry Matson; 'FlexRadio Reflector'
Subject: RE: [Flexradio] SDR !000 Bob's S meter
What does the actual pSDR meter show? If it is right, then enter a bug
report.
-Tim
-----Original Message-----
From: flexradio-boun...@flex-radio.biz
[mailto:flexradio-boun...@flex-radio.biz] On Behalf Of Barry Matson
Sent: Friday, November 12, 2010 2:26 AM
To: 'FlexRadio Reflector'
Subject: [Flexradio] SDR !000 Bob's S meter
I have just installed Bobsmeter, with PowerSDR beta v 2.0.8 on my old
SDR1000 and I notice that it reads in the centre of the scale (9 dB over S9
) on band noise with no signal present, whereas the PSDR Signal meter is
below the bottom of the scale. On a local AM BC, Bob's reads +20 db over S9
and the PSDR S meter reads 1 dB over S9. The BC station sounds distorted
like it is overloading, even with the Preamp set low and AGC-T wound back.
I realize that the AGC and preamp should not affect the S reading and they
don't. They do drop the reading for the noise on the PSDR S meter, but not
on Bob's meter.
The receiver seems noisy and insensitive on all bands.
Any ideas why this is so?
Barry
VK1BM
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