| DRM - Reception logs | Making some tests today... |
---------------
Conclusions for now:
- Connection from Sony to Mixer to be improved (SNR too low).
- Sony receiver is not compatible with Netvista monitor screen (causing
much noise)
- Thinkpad computer battery charger is causing too much noise.
---------------
First trial using Sony ICF2001D receiver.
Direct pickup point as indicated by LA6XJ in DRMRX forum
(pin 7 of IC1 - Photos posted by LA6XJ: ph1,
ph2, ph3)
I first continued using my Thinkpad computer (two new things at the
same time was not a good idea) until I realised that the battery charger
of the computer was causing a lot of trouble.
Also I am testing using RTL 6095 who recently moved to 20.9 kbps
and I don't have much experience with receiving this bitate here...
First direct connection from Sony pickup point to mixer input showed
level was far too high. I found that I could get a (somehow)
usable signal
by just holding the two wires in my hand, without electrical contact!
(reaching 20/21dB):
>>>>
DRMSoftwareRadio-MERLIN-00000127
Software Version 2.0.34
Starttime (UTC)
2004-01-03 08:19:51
Frequency
6095 kHz
Latitude
44°49'N
Longitude
0°38'W
Label
RTL DRM
Bitrate
20.88 kbps
Mode
B
Bandwidth
10 kHz
Comment
ICF2001 + hand coupling
MINUTE SNR
SYNC AUDIO TYPE
0000
20 149 1500/10
0
0001
19 149 1430/10
0
0002
19 150 1400/10
0
0003
19 149 1500/10
0
0004
21 150 1470/10
0
SNR min: 17.8, max: 22.9
CRC: 0x3af3
<<<<
For the above reason I just tried a transformer
coupling, winding a few
loops of wire on a toroid material. This was
the result (ok but too low):
>>>>
DRMSoftwareRadio-MERLIN-00000127
Software Version 2.0.34
Starttime (UTC)
2004-01-03 07:39:33
Frequency
6095 kHz
Latitude
44°49'N
Longitude
0°38'W
Label
RTL DRM
Bitrate
20.88 kbps
Mode
B
Bandwidth
10 kHz
Comment
ICF2001 + Magnetic coupling
MINUTE SNR
SYNC AUDIO TYPE
0000
16 150 1480/10
0
0001
16 150 1490/10
0
0002
16 150 1500/10
0
0003
16 150 1500/10
0
0004
16 150 1490/10
0
0005
17 150 1430/10
0
0006
15 139 770/10
0
0007
16 135 890/10
0
0008
3 51
0/00 0 trying things here
0009
9 148
0/00 0
0010
10 149
0/00 0
0011
15 149 560/10
0
0012
11 150
0/00 0
0013
10 117
0/00 0
0014
3 39
0/00 0
0015
0 0
0/00 0
0016
0 0
0/00 0
0017
0 0
0/00 0
SNR min: 0.0, max: 19.0
CRC: 0x861a
<<<<
Then tried TS440, still with Thinkpad.
Reaching 23dB without charger, then down to
15dB with charger plugged (8h35).
8h40 unplugging charger, much better.
>>>>
DRMSoftwareRadio-MERLIN-00000127
Software Version 2.0.34
Starttime (UTC)
2004-01-03 08:27:06
Frequency
6095 kHz
Latitude
44°49'N
Longitude
0°38'W
Label
RTL DRM
Bitrate
20.88 kbps
Mode
B
Bandwidth
10 kHz
Comment
TS440+Thinkpad
MINUTE SNR
SYNC AUDIO TYPE
0000
23 149 1400/10
0
0001
23 148 1380/10
0
0002
23 150 1470/10
0
0003
17 147 650/10
0 8h30 just trying charger, then off
0004
23 147 1500/10
0
0005
24 147 1500/10
0
0006
23 149 1490/10
0
0007
22 148 1410/10
0
0008
16 148 300/10
0 8h35 now with charger
0009
13 148 90/10
0
0010
10 148
0/00 0
0011
12 145 110/10
0
0012
13 150 200/10
0
0013
22 149 1290/10
0
0014
24 150 1500/10
0 8h40 now without charger
0015
24 148 1500/10
0
0016
23 150 1500/10
0
0017
23 150 1460/10
0
0018
23 150 1440/10
0
0019
23 150 1500/10
0
0020
23 147 1500/10
0
0021
23 149 1500/10
0
0022
23 150 1500/10
0
0023
23 148 1460/10
0
0024
22 148 1500/10
0
0025
22 147 1500/10
0
0026
23 147 1450/10
0
0027
23 144 1500/10
0
0028
22 149 1510/10
0
0029
22 148 1420/10
0
0030
20 149 1110/10
0
0031
21 147 1300/10
0
0032
21 146 1500/10
0
0033
21 147 1470/10
0
SNR min: 8.8, max: 24.9
CRC: 0x0089
<<<<
-9h03 Sony ICF2001D + capacitor coupling between
RX and mixer
(470 nF on each wire), still without charger.
Level becomes adjustable.
-9h15 connecting the battery charger again
:
>>>>
DRMSoftwareRadio-MERLIN-00000127
Software Version 2.0.34
Starttime (UTC)
2004-01-03 09:03:21
Frequency
6095 kHz
Latitude
44°49'N
Longitude
0°38'W
Label
RTL DRM
Bitrate
20.88 kbps
Mode
B
Bandwidth
10 kHz
Comment
ICF2001 + capa coupling +Thinkpad
MINUTE SNR
SYNC AUDIO TYPE
0000
20 139 1220/10
0
0001
20 147 1480/10
0
0002
21 150 1440/10
0
0003
21 149 1480/10
0
0004
22 150 1500/10
0
0005
22 149 1500/10
0
0006
22 150 1500/10
0
0007
21 150 1480/10
0
0008
21 149 1480/10
0
0009
22 150 1490/10
0
0010
22 149 1490/10
0
0011
22 138 1340/10
0
0012
0 0
0/00 0 9h15 with battery charger
0013
0 0
0/00 0
0014
0 6
0/00 0
0015
0 0
0/00 0
0016
0 0
0/00 0
0017
0 0
0/00 0
0018
0 0
0/00 0
0019
0 0
0/00 0
0020
0 0
0/00 0
0021
0 0
0/00 0
0022
0 0
0/00 0
0023
0 0
0/00 0
SNR min: 0.0, max: 22.9
CRC: 0x91ff
<<<<
- 9h23 trying back my Netvista computer - Not
much better, but don't remember if I had
unplugged the charger...:
>>>>
DRMSoftwareRadio-MERLIN-00000127
Software Version 2.0.34
Starttime (UTC)
2004-01-03 09:22:57
Frequency
6095 kHz
Latitude
44°49'N
Longitude
0°38'W
Label
RTL DRM
Bitrate
20.88 kbps
Mode
B
Bandwidth
10 kHz
Comment
MINUTE SNR
SYNC AUDIO TYPE
0000
18 150 670/10
0
0001
17 149 720/10
0
0002
18 149 520/10
0
0003
16 148 570/10
0
0004
12 147 320/10
0
0005
18 149 1030/10
0
0006
21 149 1420/10
0
0007
17 150 790/10
0
0008
16 149 530/10
0
0009
17 149 860/10
0
0010
19 148 1010/10
0
0011
16 148 550/10
0
0012
18 148 1040/10
0
0013
17 148 770/10
0
0014
17 148 610/10
0
0015
19 147 1360/10
0
0016
19 149 1120/10
0
0017
20 148 1440/10
0
0018
19 148 920/10
0
0019
18 149 990/10
0
0020
20 149 1300/10
0
SNR min: 10.1, max: 22.7
CRC: 0x2479
<<<<
- 9h48 Netvista + ICF2001D (wire antenna):
>>>>
DRMSoftwareRadio-MERLIN-00000127
Software Version 2.0.34
Starttime (UTC)
2004-01-03 09:46:55
Frequency
6095 kHz
Latitude
44°49'N
Longitude
0°38'W
Label
n/a
Bitrate
n/a
Mode
B
Bandwidth
10 kHz
Comment
ICF2001D
MINUTE SNR
SYNC AUDIO TYPE
0000
11 98
40/10 0
0001
15 150 890/10
0
0002
13 150 330/10
0
0003
12 148 60/10
0
0004
14 148 650/10
0
0005
13 150 230/10
0
0006
12 150 90/10
0
0007
9 121 10/10
0
0008
14 150 680/10
0
0009
14 149 320/10
0
0010
11 149 180/10
0
SNR min: 0.0, max: 17.2
CRC: 0x04a6
<<<<
- 10h08 9850kHz Netvista
+ TS440 while nearby Thinkpad charger is on.
- 10h23 same as above with charger OFF.
- 10h30 same with nearby charger ON.
Well little effect, hopefully.
>>>>
DRMSoftwareRadio-MERLIN-00000127
Software Version 2.0.34
Starttime (UTC)
2004-01-03 10:08:00
Frequency
9850 kHz
Latitude
44°49'N
Longitude
0°38'W
Label
Bouquet Flevo NL
Bitrate
20.88 kbps
Mode
B
Bandwidth
10 kHz
Comment
TS440+Netvista
MINUTE SNR
SYNC AUDIO TYPE
0000
25 150 1350/10
0
0001
21 150 1410/10
0
0002
20 150 1090/10
0
0003
18 150 1010/10
0
0004
19 150 1020/10
0
0005
26 150 1350/10
0
0006
28 150 1490/10
0
0007
28 150 1500/10
0
0008
27 150 1450/10
0
0009
27 150 1420/10
0
0010
27 150 1420/10
0
0011
27 149 1400/10
0
0012
27 150 1410/10
0
0013
26 149 1430/10
0
0014
25 150 1270/10
0
0015
26 149 1360/10
0 10H23
0016
26 149 1420/10
0
0017
27 150 1450/10
0
0018
26 149 1330/10
0
0019
25 150 1400/10
0
0020
26 149 1400/10
0
0021
25 150 1280/10
0
0022
23 149 1320/10
0 10H30
0023
23 150 1380/10
0
0024
23 150 1340/10
0
0025
25 150 1470/10
0
0026
22 149 1120/10
0
0027
23 150 1400/10
0
0028
22 150 1250/10
0
0029
22 149 1320/10
0
0030
22 150 1280/10
0
0031
21 150 1170/10
0
0032
22 150 1300/10
0
0033
23 150 1290/10
0
0034
25 149 1500/10
0
SNR min: 14.0, max: 29.2
CRC: 0xc9fc
<<<<
- 10h49 trying Netvista computer with Sony
ICF2001D
The monitor screen of Netvista is causing
a lot of noise to the Sony ! Have to switch it off:
>>>>
DRMSoftwareRadio-MERLIN-00000127
Software Version 2.0.34
Starttime (UTC)
2004-01-03 10:49:07
Frequency
9850 kHz
Latitude
44°49'N
Longitude
0°38'W
Label
Bouquet Flevo NL
Bitrate
20.88 kbps
Mode
B
Bandwidth
10 kHz
Comment
ICF2001D+Netvista+NOScreen
MINUTE SNR
SYNC AUDIO TYPE
0000
20 150 1320/10
0
0001
19 150 1310/10
0
0002
21 149 1280/10
0
0003
20 150 1220/10
0
0004
18 149 1070/10
0
0005
17 149 990/10
0
0006
18 149 1090/10
0
0007
18 149 1160/10
0
0008
18 150 1110/10
0
0009
18 150 1260/10
0
SNR min: 10.8, max: 22.7
CRC: 0xacb1
<<<<
11h03- ICF2001D+Thinkpad:
>>>>
DRMSoftwareRadio-MERLIN-00000127
Software Version 2.0.34
Starttime (UTC)
2004-01-03 11:02:57
Frequency
9850 kHz
Latitude
44°49'N
Longitude
0°38'W
Label
Bouquet Flevo NL
Bitrate
20.88 kbps
Mode
B
Bandwidth
10 kHz
Comment
ICF2001 + capa coupling +Thinkpad
MINUTE SNR
SYNC AUDIO TYPE
0000
15 137 540/10
0
0001
0 7
0/00 0
0002
0 5
0/00 0
0003
0 6
0/00 0
0004
9 97 230/10
0
0005
1 19
0/00 0
0006
12 111 420/10
0 11H07 without charger
0007
13 149 660/10
0
0008
12 122 490/10
0
0009
14 148 890/10
0
0010
13 97 700/10
0
0011
14 106 660/10
0
0012
14 89 640/10
0 (guess what... battery is empty)
SNR min: 0.0, max: 18.9
CRC: 0x18e9
<<<<
- 11H20: ICF2001D + Netvista (+monitor off)
(+capa coupling with mixer)
- 11H35 changing to TS440 + Netvista (this
is my "reference" equipment):
>>>>
DRMSoftwareRadio-MERLIN-00000127
Software
Version 2.0.34
Starttime
(UTC) 2004-01-03 11:20:01
Frequency
9850 kHz
Latitude
44°49'N
Longitude
0°38'W
Label
Bouquet Flevo NL
Bitrate
20.88 kbps
Mode
B
Bandwidth
10 kHz
Comment
ICF2001D+Netvista+NOScreen
MINUTE
SNR SYNC AUDIO
TYPE
0000 15 149
550/10 0
0001 16 134
640/10 0
0002 17 142
550/10 0
0003 19 150
1160/10 0
0004 19 138
870/10 0
0005 14 150
400/10 0
0006 14 134
380/10 0
0007 19 150
1270/10 0
0008 16 150
630/10 0
0009 16 150
500/10 0
0010 17 151
830/10 0
0011 19 150
970/10 0
0012 16 150
480/10 0
0013 16 150
620/10 0
0014 18 141
750/10 0
0015 24 90
850/10 0
0016 25 150
1220/10 0 now using TS440!
0017 24 149
1440/10 0
0018 26 149
1500/10 0
0019 24 146
1200/10 0
0020 25 149
1350/10 0
0021 24 147
1410/10 0
0022 22 148
1240/10 0
0023 25 148
1470/10 0
0024 27 149
1490/10 0
0025 25 149
1390/10 0
0026 26 150
1460/10 0
0027 24 149
1470/10 0
0028 26 150
1450/10 0
0029 25 150
1500/10 0
0030 25 149
1370/10 0
0031 26 150
1500/10 0
0032 20 149
1230/10 0
0033 24 147
1310/10 0
0034 26 148
1500/10 0
0035 23 150
1220/10 0
0036 24 149
1370/10 0
0037 23 149
1340/10 0
0038 23 149
1320/10 0
SNR min: 0.0, max: 28.5
CRC:
0x587f
<<<<
======================================
Thinkpad Computer=
IBM Thinkpad 570E, P2 500 MHz, Win2000, 196 Mo.
Built-in sound card by "Crystal Sound Fusion"
TS440 RX=
TS440 + changed AM filter + AM point + AM mode,
SAT-Service crystal mixer 467kHz outside the rx
with a 9v battery, Ant dipole 2x7m on balcony +
5m coax cable . (My TS440 mod is described here)
Netvista computer=
IBM Netvista A30P P4 1.8G
built-in soundcard
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