Matt, have you enabled the amplifier?
Add the following line to the end of /etc/modprobe.conf
options dvb-usb-dib0700 force_lna_activation=1
It forces the Low Noise Amplifier on and this made the difference between
<40% to 70% signal for me.
I'm using Fedora Core 6 2.6.20-rc5 on a AM2 dual core 3800 and it has been
pretty reliable, but I've had a couple of complete hangs which seem to be
dvb driver related.
Graham
----- Original Message -----
From: <matt.nottingham@xxxxxxxxx>
To: <linux-dvb@xxxxxxxxxxx>
Sent: Sunday, January 28, 2007 6:10 PM
Subject: Problem getting channel list with nova-t-500
Hi,
I have a Debian (unstable) AMD64 (with 4gig RAM) and a nova-t-500
card. I'm currently running linux 2.6.20-rc6. If I try 'scan' I get
the following:
# scan -vvv /usr/share/doc/dvb-utils/examples/scan/dvb-t/uk-SandyHeath
scanning /usr/share/doc/dvb-utils/examples/scan/dvb-t/uk-SandyHeath
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
initial transponder 641833334 0 2 9 3 0 0 0
>>> tune to:
641833334:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_AUTO:QAM_64:TRANSMISSION_MODE_2K:GUARD_INTERVAL_1_32:HIERARCHY_NONE
>>> tuning status == 0x1a
WARNING: filter timeout pid 0x0011
WARNING: filter timeout pid 0x0000
WARNING: filter timeout pid 0x0010
dumping lists (0 services)
Done.
If I use kaffeine (using Sandyheath as the default location) I see:
Using DVB device 0:0 "DiBcom 3000MC/P"
tuning DVB-T to 641833000 Hz
inv:2 bw:0 fecH:2 fecL:9 mod:3 tm:0 gi:0 hier:0
. LOCKED.
Transponders: 1/1
Invalid section length or timeout: pid=17
Invalid section length or timeout: pid=0
Frontend closed
So it certainly seems to find the signal (as it locks) but then gets a
bit grumpy!
I've tried 2.6.19.2, setting mem=3G (having 4gig of ram has upset
certain cards (ethernet, USB,....) in the past), using the latest
drivers from the SCM system, having
'options dvb-usb-dib0700 force_lna_activation=1'
in my /etc/modules.conf - but all give the above results.
I don't have a TV with me nor do I have MS-Windows to try the card out
there - so is it just a signal (ie. lack there-of!) problem? Hopefully
next weekend I'll have my USRP (http://gnuradio.org/trac/wiki) with me
and be able to see what strength signals I do have.
Any thoughts or hints or suggestions would be welcome!
Thanks
Matt Nottingham
Just for completeness, if I do 'dmesg | grep -i dvb' I get:
dvb_usb_dib0700 2-1:1.0: usb_probe_interface
dvb_usb_dib0700 2-1:1.0: usb_probe_interface - got id
dvb-usb: found a 'Hauppauge Nova-T 500 Dual DVB-T' in cold state, will try
to load a firmware
dvb-usb: downloading firmware from file 'dvb-usb-dib0700-01.fw'
dvb-usb: found a 'Hauppauge Nova-T 500 Dual DVB-T' in warm state.
**WARNING** I2C adapter driver [Hauppauge Nova-T 500 Dual DVB-T] forgot to
specify physical device; fix it!
dvb-usb: will pass the complete MPEG2 transport stream to the software
demuxer.
DVB: registering new adapter (Hauppauge Nova-T 500 Dual DVB-T).
DVB: registering frontend 0 (DiBcom 3000MC/P)...
dvb-usb: will pass the complete MPEG2 transport stream to the software
demuxer.
DVB: registering new adapter (Hauppauge Nova-T 500 Dual DVB-T).
DVB: registering frontend 1 (DiBcom 3000MC/P)...
dvb-usb: Hauppauge Nova-T 500 Dual DVB-T successfully initialized and
connected.
usbcore: registered new interface driver dvb_usb_dib0700
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