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Re: [noaaport] [ldm-users] Bug in Novra S-300 receiver, and a request

We tried out the DVB-S2 signal on 1154.15 this morning. Lower signal levels versus the DVB-S signal, and lots of errors in the LDMD log (missing fragment in sequence, Gap in SBN). Haven't tried to reproduce the error you mentioned on the S300 becoming slow/unresponsive after an extended DVB-S2 signal outage.
This is with a 7.3m dish, although we have the signal split two ways (we have a primary and backup receiver). 

With the S300 on the DVB-S2 signal (1154.15 MHz), I get the following:

Signal Lock: On
Data Lock: On
Uncorrectable Rate: 0/Second
Packet Error Rate: 0.0000e+00

Carrier to Noise C/N: 13.1dB
Signal Strength: -50 dBm

With the DVB-S signal, we get the following with the S300:

Signal Lock: On
Data Lock: On
Uncorrectable Rate: 0/Second
Viterbi Bit Error Rate: 1.0000e+01

Carrier to Noise C/N: 17.7dB
Signal Strength: -48 dBm

ldmd log error example:
Apr 27 15:46:45 dvb2 readnoaaport[18989] ERROR: Missing fragment in sequence, last 2/53233140 this 4/53233140 Apr 27 15:46:45 dvb2 readnoaaport[18989] ERROR: Missing fragment in sequence, last 3/53233141 this 5/53233141 Apr 27 15:46:45 dvb2 dvbs_multicast[18988] ERROR: Gap in SBN last 57406505, this 57406507 Apr 27 15:46:46 dvb2 dvbs_multicast[18988] ERROR: Gap in SBN last 57406522, this 57406524 Apr 27 15:46:46 dvb2 dvbs_multicast[18988] ERROR: Gap in SBN last 57406530, this 57406532 Apr 27 15:46:46 dvb2 readnoaaport[18989] ERROR: Missing fragment in sequence, last 5/53233142 this 7/53233142 Apr 27 15:46:46 dvb2 readnoaaport[18989] ERROR: Missing fragment in sequence, last 11/53233143 this 13/53233143 Apr 27 15:46:46 dvb2 readnoaaport[18989] ERROR: Missing fragment in sequence, last 5/53233144 this 7/53233144 Apr 27 15:46:46 dvb2 dvbs_multicast[18988] ERROR: Gap in SBN last 57406555, this 57406557 Apr 27 15:46:47 dvb2 dvbs_multicast[18988] ERROR: Gap in SBN last 57406574, this 57406576 Apr 27 15:46:47 dvb2 dvbs_multicast[18988] ERROR: Gap in SBN last 57406581, this 57406583 Apr 27 15:46:47 dvb2 dvbs_multicast[18988] ERROR: Gap in SBN last 57406585, this 57406587 Apr 27 15:46:47 dvb2 dvbs_multicast[18988] ERROR: Gap in SBN last 57406598, this 57406600 


Gilbert Sebenste wrote:

On Sat, 23 Apr 2011, Gilbert Sebenste wrote:
Jose Nieves and I have been able to reproduce a bug where if the NOAAPort broadcast goes down for a significant amount of time (say 30 minutes), the Novra S-300 locks up and needs a hard reboot (unplug) to get it working in 
DVB-S2 mode. I have not tried to check this with the unit in DVB-S
receive mode. More specifically, if you tune the receiver to a
non-functioning frequency while in DVB-S2 mode, the S-300 will eventually 
lock up.

Just an FYI.


I forgot to mention...I notified Novra's engineers, and they got
back to me today (Saturday) saying they will look into it.
Also, it appears as though it doesn't completely become unresponsive, but can take over a minute to access it with constant, repeated tries 
Obviously, that's not good.
In any case, for those of you running S-300s, could any of you do me favor? I am still getting a ton of dropped packets with a carrier to noise 
above 14 and a signal level of -44 dBm. I'd like to know if anyone is
seeing the same thing. At least one entity is getting very good reception
since the DVB-S2 broadcast moved to 1154.150 MHZ.
******************************************************************************* 
Gilbert Sebenste ********
(My opinions only!) ******
Staff Meteorologist, Northern Illinois University ****
E-mail: sebenste@xxxxxxxxxxxxxxxxxxxxx ***
web: http://weather.admin.niu.edu **
******************************************************************************* 

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University of Wisconsin-Madison
Space Science & Engineering Center
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