DRM from CBC (9800 kHz from Sackville)

[Alan Johnson]

CBC 11955 kHz 0300 UTC

No transmission tonight as of 0305 UTC.

[chemclouds]

CBC 9800

ALL BROADCASTS ARE IN COORDINATED UNIVERSAL TIME. UTC

RADIO NETHERLANDS------20:30 TO 21:00
RADIO CANADA INTERNATIONAL------21:00 TO 22:00
DEUTSCHE WELLE RADIO------22:00 TO 22:30
RADIO SWEDEN INTERNATIONAL------22:30 TO 23:00
BBC WORLD SERVICE------23:00 TO 23:59

[chemclouds]

CBC 6140

ALL BROADCASTS ARE IN COORDINATED UNIVERSAL TIME. UTC

CHINA RADIO INTERNATIONAL------01:24 TO 01:59

[chemclouds]

CBC 9800

ALL BROADCASTS ARE IN COORDINATED UNIVERSAL TIME. UTC

VATICAN RADIO------19:55 TO 20:30
RADIO NETHERLANDS------20:30 TO 21:00
RADIO CANADA INTERNATIONAL------21:00 TO 22:00
DEUTSCHE WELLE RADIO------22:00 TO 22:30
RADIO SWEDEN INTERNATIONAL------22:30 TO 23:00
BBC WORLD SERVICE------23:00 TO 23:59

[chemclouds]

CBC 6140

ALL BROADCASTS ARE IN COORDINATED UNIVERSAL TIME. UTC

CHINA RADIO INTERNATIONAL------01:00 TO 01:59

[chemclouds]

CBC 9800

I was going to submit a Log using DReaM but I forgot to check the log file. Well, I blew it on this one. Don`t say a word.
Carl

[chemclouds]

CBC 6140

ALL BROADCASTS ARE IN COORDINATED UNIVERSAL TIME. UTC

CHINA RADIO INTERNATIONAL------01:25 TO 01:58

This is my first log report using DReaM. Yeah, good for you. DUH
Carl

[chemclouds]

CBC 9800

ALL BROADCASTS ARE IN COORDINATED UNIVERSAL TIME. UTC


RADIO NETHERLANDS------20:30 TO 21:00
RADIO CANADA INTERNATIONAL------21:00 TO 22:00
DEUTSCHE WELLE RADIO------22:00 TO 22:30
RADIO SWEDEN INTERNATIONAL------22:30 TO 23:00
BBC WORLD SERVICE------23:00 TO 23:59

This version of DReaM is an improvement over the earlier versions I have experimented with. This is my second report using DReaM.
Carl

[chemclouds]

CBC 6140

ALL BROADCASTS ARE IN COORDINATED UNIVERSAL TIME. UTC

CHINA RADIO INTERNATIONAL------00:59 TO 01:59

This is my last report using DReaM. I ran DReaM and Software Radio simultaneously during this broadcast and found DRM Software Radio with a better SNR of 2 db. There are several things I like about DReaM. The most interesting, it has a transmitter. Feed this into a modified FM Exciter. DRM Pirate Radio. Just kidding.
Here is my last report using DReaM.
Carl

[chemclouds]

CBC 9800

ALL BROADCASTS ARE IN COORDINATED UNIVERSAL TIME. UTC

VATICAN RADIO------20:00 TO 20:30
RADIO NETHERLANDS------20:30 TO 21:00
RADIO CANADA INTERNATIONAL------21:00 TO 22:00
DEUTSCHE WELLE RADIO------22:00 TO 22:30
RADIO SWEDEN INTERNATIONAL------22:30 TO 23:00
BBC WORLD SERVICE------23:00 TO 23:14



Did it bite the dust again ?

[VE3MEO]

Re: DReaM vs DRMrx

Originally posted by chemclouds
This is my last report using DReaM. I ran DReaM and Software Radio simultaneously during this broadcast and found DRM Software Radio with a better SNR of 2 db.
Carl

Carl, that's a surprising observation compared to all other comparative reports I have seen of DReaM 1.1.1c vs DRMrx whicch show DReaM reporting equal or higher SNR. More importantly, they also show DReaM achieving a higher success rate with audio decoding.

If you have enough CPU horsepower, run them both and use the DRMcalc compare logs feature to see the difference.

I don't have DRMrx so cannot provide first-hand observation but have scanned a lot of reports showing concurrent logs from both.

73 Tom

[VE3MEO]

CRI 6140 Toronto 2004-10-19 01:17-01:58 31.8dB max SNR - new high

I just got around to looking at this log from my Monday night and post it only because it recorded a new high for max SNR for my receiver - 31.8 dB. Actually saw 32.4 before I turned on the log but no proof! The relatively poor audio decoding was due to playing around with the antenna switch and disturbing my flaky breadboard downconverter.

73, Tom

[chemclouds]

Re: Re: DReaM vs DRMrx

Originally posted by VE3MEO


Carl, that's a surprising observation compared to all other comparative reports I have seen of DReaM 1.1.1c vs DRMrx whicch show DReaM reporting equal or higher SNR. More importantly, they also show DReaM achieving a higher success rate with audio decoding.

If you have enough CPU horsepower, run them both and use the DRMcalc compare logs feature to see the difference.

I don't have DRMrx so cannot provide first-hand observation but have scanned a lot of reports showing concurrent logs from both.

73 Tom

Hi Tom,
Ok, I will run them both tomorrow night on 6140. I will also submit both logs.

Carl


ALL BROADCASTS ARE IN COORDINATED UNIVERSAL TIME. UTC

CHINA RADIO INTERNATIONAL------01:01 TO 01:59

[chemclouds]

CBC 9800

ALL BROADCASTS ARE IN COORDINATED UNIVERSAL TIME. UTC

VATICAN RADIO------20:14 TO 20:30
RADIO NETHERLANDS------20:30 TO 21:00
RADIO CANADA INTERNATIONAL------21:00 TO 22:00
DEUTSCHE WELLE RADIO------22:00 TO 22:30
RADIO SWEDEN INTERNATIONAL------22:30 TO 23:00
BBC WORLD SERVICE------23:00 TO 23:59


Shortly after 02:00 I will upload two log reports. The two logs will be used for comparing the SNR of DRM Software Radio 2.0.34 and DReaM 1.1.1cvs. The frequency will be 6140 CBC. The reports will not be zipped together. They will be uploaded separately.
Carl

[VE3MEO]

9800 Toronto 2004-10-22 22:50-23:53 100% 31.3/28.3 dB max/avg SNR on vertical ant

Very interesting - Rx#1 was connected to my 2m J-Pole antenna up about 35'. Rx#2 is the DX-394B with the not so good converter connected to my 104' G5RV up about 30' and oriented so that Sackville is more or less off the end.

I was having dinner through much of the logging period but, before the log, switched Rx#1 between the two antennas to verify what I was seeing as a difference between the antennas in the image in the next posting - the estimated impulse response was much narrower for the vertical than for the horizontal antenna for at least some of the time.

I suspect the audio and SNR drops for Rx#2 were due to guard band violations. None occurred with Rx#1 and the vertical. This is probably almost entirely due to the vertical's discrimination against high angle multi-hop paths which would arrive delayed relative to the shortest path.

It's a short vertical, just 2.3m exposed, and a vertical run of coax down the tower which may or may not act as a radiator to some extent in the 30m band. The exposed part is less than 1/10 wavelength at 9800 kHz but should favour vertical polarisation and exhibit a null in pickup straight up.

BTW the log time could be wrong by 5 minutes or so - transmission ended at 23:58 or so as usual but I edited the log to cut off the 5 min or so overrun at the end and took out the first 5 minutes when I was switching antennas.

73, Tom