I had a similar problem. I noticed that the antenna input from the PVR-350 is not as sensitive as the one from most televisions. For me, putting an antenna amplifier before the PVR-350 solved these problems.
Jonathan Smith wrote: > I am reposting my question about the ability to improve quality of the > video on certain channels. As my original post indicates, there are a > few channels where the quality of the output is grainy, a couple have > horizontal lines on screen. I have similar results using either my > nvidia card for output or the 350 card. I do record on some of these > channels, it looks worse than a VCR recording. The channels look fine > when viewing from cable TV. Most of them are lower number channels: > 12,14,15,17. Any suggestions? > > Thanks. > > Here is my config: > > OS - Fedora Core 4 > Kernel: 2.6.14-1.1653_FC4 > ivtv version 0.4.1 > xdriver: 0.10.6 > video resolution: 720x480 > windows manager: KDE > > CPU: AMD Athlon XP 3200+ > Memory: 512 MB > Motherboard: Chaintech Summit 7NJL6 > Video Card: nVidia Corporation NV18 GeForce 4 MX > Sound Card: SoundBlaster Audigy OEM > Video Capture Cards: 1 Hauppauge 350 card, 1 Hauppauge 500 card > Video Out: Hauppauge 350 > > US Cable TV > > dmesg of ivtv modules: > > Dec 29 20:59:50 mythtv kernel: ivtv: ==================== START INIT > IVTV ==================== > Dec 29 20:59:50 mythtv kernel: ivtv: version 0.4.1 (tagged release) loading > Dec 29 20:59:50 mythtv kernel: ivtv: Linux version: 2.6.14-1.1653_FC4 > 686 REGPARM 4KSTACKS gcc-4.0 > Dec 29 20:59:50 mythtv kernel: ivtv: In case of problems please > include the debug info between > Dec 29 20:59:50 mythtv kernel: ivtv: the START INIT IVTV and END INIT > IVTV lines, along with > Dec 29 20:59:50 mythtv kernel: ivtv: any module options, when mailing > the ivtv-users mailinglist. > Dec 29 20:59:50 mythtv kernel: ivtv0: Autodetected WinTV PVR 350 card > (cx23415 based) > Dec 29 20:59:50 mythtv kernel: ACPI: PCI Interrupt Link [LNK4] enabled at IRQ > 11 > Dec 29 20:59:50 mythtv kernel: ACPI: PCI Interrupt 0000:01:07.0[A] -> > Link [LNK4] -> GSI 11 (level, low) -> IRQ 11 > Dec 29 20:59:50 mythtv kernel: ivtv0: Unreasonably low latency timer, > setting to 64 (was 32) > Dec 29 20:59:50 mythtv kernel: tveeprom: ivtv version > Dec 29 20:59:51 mythtv kernel: tveeprom: Hauppauge: model = 48132, rev > = J323, serial# = 2754911 > Dec 29 20:59:51 mythtv kernel: tveeprom: tuner = Philips FM1236 (idx = > 23, type = 2) > Dec 29 20:59:51 mythtv kernel: tveeprom: tuner fmt = NTSC(M) (eeprom = > 0x08, v4l2 = 0x00001000) > Dec 29 20:59:51 mythtv kernel: tveeprom: audio processor = MSP4448 (type = 1b) > Dec 29 20:59:51 mythtv kernel: tveeprom: decoder processor = SAA7115 (type = > 13) > Dec 29 20:59:51 mythtv kernel: ivtv0: i2c attach to card #0 ok > [client=tveeprom, addr=50] > Dec 29 20:59:51 mythtv kernel: tuner 0-0061: chip found @ 0xc2 (ivtv > i2c driver #0) > Dec 29 20:59:51 mythtv kernel: ivtv0: i2c attach to card #0 ok > [client=(tuner unset), addr=61] > Dec 29 20:59:51 mythtv kernel: saa7115 0-0021: ivtv driver > Dec 29 20:59:51 mythtv kernel: saa7115 0-0021: saa7115 found @ 0x42 > (ivtv i2c driver #0) > Dec 29 20:59:51 mythtv kernel: ivtv0: i2c attach to card #0 ok > [client=saa7115, addr=21] > Dec 29 20:59:51 mythtv kernel: saa7127 0-0044: ivtv driver > Dec 29 20:59:51 mythtv kernel: saa7127 0-0044: saa7127 found @ 0x88 > (ivtv i2c driver #0) > Dec 29 20:59:51 mythtv kernel: ivtv0: i2c attach to card #0 ok > [client=saa7127, addr=44] > Dec 29 20:59:51 mythtv kernel: msp3400 0-0040: ivtv driver > Dec 29 20:59:52 mythtv kernel: msp3400 0-0040: chip=MSP4448G-A2 +nicam > +simple +simpler +radio mode=simpler > Dec 29 20:59:52 mythtv kernel: ivtv0: i2c attach to card #0 ok > [client=MSP4448G-A2, addr=40] > Dec 29 20:59:52 mythtv kernel: msp3400 0-0040: msp34xxg daemon started > Dec 29 20:59:52 mythtv kernel: ivtv0: loaded v4l-cx2341x-enc.fw > firmware (262144 bytes) > Dec 29 20:59:52 mythtv kernel: ivtv0: loaded v4l-cx2341x-dec.fw > firmware (262144 bytes) > Dec 29 20:59:52 mythtv kernel: ivtv0: Encoder revision: 0x02040024 > Dec 29 20:59:52 mythtv kernel: ivtv0 warning: Encoder Firmware can be > buggy, use version 0x02040011 or 0x02050032. > Dec 29 20:59:52 mythtv kernel: ivtv0: Decoder revision: 0x02020023 > Dec 29 20:59:52 mythtv kernel: ivtv0: Allocate DMA encoder MPEG > stream: 128 x 32768 buffers (4096KB total) > Dec 29 20:59:52 mythtv kernel: ivtv0: Allocate DMA encoder YUV stream: > 194 x 10800 buffers (2048KB total) > Dec 29 20:59:53 mythtv kernel: ivtv0: Allocate DMA encoder VBI stream: > 120 x 17472 buffers (2048KB total) > Dec 29 20:59:53 mythtv kernel: ivtv0: Allocate DMA encoder PCM audio > stream: 455 x 4608 buffers (2048KB total) > Dec 29 20:59:53 mythtv kernel: ivtv0: Create encoder radio stream > Dec 29 20:59:53 mythtv kernel: ivtv0: Allocate DMA decoder MPEG > stream: 16 x 65536 buffers (1024KB total) > Dec 29 20:59:53 mythtv kernel: ivtv0: Allocate DMA decoder VBI stream: > 512 x 2048 buffers (1024KB total) > Dec 29 20:59:53 mythtv kernel: ivtv0: Create decoder VOUT stream > Dec 29 20:59:53 mythtv kernel: ivtv0: Allocate DMA decoder YUV stream: > 24 x 43200 buffers (1024KB total) > Dec 29 20:59:53 mythtv kernel: ivtv0: unable to open firmware > v4l-cx2341x-init-mpeg.bin > Dec 29 20:59:53 mythtv kernel: ivtv0: did you put the firmware in the > hotplug firmware directory? > Dec 29 20:59:53 mythtv kernel: ivtv0: failed to read mpeg decoder > initialisation file v4l-cx2341x-init-mpeg.bin > Dec 29 20:59:53 mythtv kernel: tuner 0-0061: type set to 2 (Philips > NTSC (FI1236,FM1236 and compatibles)) > Dec 29 20:59:53 mythtv kernel: ivtv0: Initialized WinTV PVR 350, card #0 > Dec 29 20:59:53 mythtv kernel: ivtv: ====================== NEXT > CARD ====================== > Dec 29 20:59:53 mythtv kernel: ivtv1: Autodetected WinTV PVR 150 card > (cx23416 based) > Dec 29 20:59:53 mythtv kernel: ACPI: PCI Interrupt Link [LNK1] enabled at IRQ > 9 > Dec 29 20:59:53 mythtv kernel: PCI: setting IRQ 9 as level-triggered > Dec 29 20:59:53 mythtv kernel: ACPI: PCI Interrupt 0000:02:08.0[A] -> > Link [LNK1] -> GSI 9 (level, low) -> IRQ 9 > Dec 29 20:59:53 mythtv kernel: ivtv1: Unreasonably low latency timer, > setting to 64 (was 32) > Dec 29 20:59:53 mythtv kernel: tveeprom: Second (radio) tuner idx 101 > Dec 29 20:59:53 mythtv kernel: tveeprom: ivtv version > Dec 29 20:59:53 mythtv kernel: tveeprom: Hauppauge: model = 23552, rev > = D492, serial# = 7894323 > Dec 29 20:59:53 mythtv kernel: tveeprom: tuner = Philips FQ1236A MK4 > (idx = 92, type = 57) > Dec 29 20:59:53 mythtv kernel: tveeprom: tuner fmt = NTSC(M) (eeprom = > 0x08, v4l2 = 0x00001000) > Dec 29 20:59:53 mythtv kernel: tveeprom: audio processor = CX25843 (type = 25) > Dec 29 20:59:53 mythtv kernel: tveeprom: decoder processor = CX25843 (type = > 1e) > Dec 29 20:59:53 mythtv kernel: ivtv1: i2c attach to card #1 ok > [client=tveeprom, addr=50] > Dec 29 20:59:53 mythtv kernel: tuner 1-0060: chip found @ 0xc0 (ivtv > i2c driver #1) > Dec 29 20:59:53 mythtv kernel: tuner 1-0060: TEA5767 detected. > Dec 29 20:59:53 mythtv kernel: ivtv1: i2c attach to card #1 ok > [client=(tuner unset), addr=60] > Dec 29 20:59:53 mythtv kernel: tuner 1-0060: type set to 62 (Philips > TEA5767HN FM Radio) > Dec 29 20:59:53 mythtv kernel: tuner 1-0061: chip found @ 0xc2 (ivtv > i2c driver #1) > Dec 29 20:59:53 mythtv kernel: ivtv1: i2c attach to card #1 ok > [client=(tuner unset), addr=61] > Dec 29 20:59:53 mythtv kernel: tda9885/6/7: chip found @ 0x86 > Dec 29 20:59:53 mythtv kernel: ivtv1: i2c attach to card #1 ok > [client=tda9887, addr=43] > Dec 29 20:59:53 mythtv kernel: ivtv1: This is the first unit of a PVR500 > Dec 29 20:59:53 mythtv kernel: cx25840 1-0044: ivtv driver > Dec 29 20:59:53 mythtv kernel: cx25840 1-0044: cx25843-23 found @ 0x88 > (ivtv i2c driver #1) > Dec 29 20:59:53 mythtv kernel: cx25840 1-0044: unable to open firmware > v4l-cx25840.fw > Dec 29 20:59:53 mythtv kernel: ivtv1: i2c attach to card #1 ok > [client=cx25840, addr=44] > Dec 29 20:59:53 mythtv kernel: wm8775 1-001b: ivtv driver > Dec 29 20:59:53 mythtv kernel: wm8775 1-001b: chip found @ 0x36 (ivtv > i2c driver #1) > Dec 29 20:59:53 mythtv kernel: ivtv1: i2c attach to card #1 ok > [client=wm8775, addr=1b] > Dec 29 20:59:53 mythtv kernel: ivtv1: Detected a TEA5767 radio tuner. > Enabling radio support. > Dec 29 20:59:53 mythtv kernel: ivtv1: loaded v4l-cx2341x-enc.fw > firmware (262144 bytes) > Dec 29 20:59:53 mythtv kernel: ivtv1: Encoder revision: 0x02040024 > Dec 29 20:59:53 mythtv kernel: ivtv1 warning: Encoder Firmware can be > buggy, use version 0x02040011 or 0x02050032. > Dec 29 20:59:53 mythtv kernel: ivtv1: Allocate DMA encoder MPEG > stream: 128 x 32768 buffers (4096KB total) > Dec 29 20:59:53 mythtv kernel: ivtv1: Allocate DMA encoder YUV stream: > 194 x 10800 buffers (2048KB total) > Dec 29 20:59:53 mythtv kernel: ivtv1: Allocate DMA encoder VBI stream: > 120 x 17472 buffers (2048KB total) > Dec 29 20:59:53 mythtv kernel: ivtv1: Allocate DMA encoder PCM audio > stream: 455 x 4608 buffers (2048KB total) > Dec 29 20:59:54 mythtv kernel: ivtv1: Create encoder radio stream > Dec 29 20:59:54 mythtv kernel: tuner 1-0061: type set to 57 (Philips > FQ1236A MK4) > Dec 29 20:59:54 mythtv kernel: ivtv1: Initialized WinTV PVR 500 (unit > #1), card #1 > Dec 29 20:59:54 mythtv kernel: ivtv: ====================== NEXT > CARD ====================== > Dec 29 20:59:54 mythtv kernel: ivtv2: Autodetected WinTV PVR 150 card > (cx23416 based) > Dec 29 20:59:54 mythtv kernel: ACPI: PCI Interrupt Link [LNK2] enabled at IRQ > 5 > Dec 29 20:59:54 mythtv kernel: ACPI: PCI Interrupt 0000:02:09.0[A] -> > Link [LNK2] -> GSI 5 (level, low) -> IRQ 5 > Dec 29 20:59:54 mythtv kernel: ivtv2: Unreasonably low latency timer, > setting to 64 (was 32) > Dec 29 20:59:54 mythtv kernel: tveeprom: Second (radio) tuner idx 101 > Dec 29 20:59:54 mythtv kernel: tveeprom: ivtv version > Dec 29 20:59:54 mythtv kernel: tveeprom: Hauppauge: model = 23552, rev > = D492, serial# = 7894323 > Dec 29 20:59:54 mythtv kernel: tveeprom: tuner = Philips FQ1236A MK4 > (idx = 92, type = 57) > Dec 29 20:59:54 mythtv kernel: tveeprom: tuner fmt = NTSC(M) (eeprom = > 0x08, v4l2 = 0x00001000) > Dec 29 20:59:54 mythtv kernel: tveeprom: audio processor = CX25843 (type = 25) > Dec 29 20:59:54 mythtv kernel: tveeprom: decoder processor = CX25843 (type = > 1e) > Dec 29 20:59:54 mythtv kernel: ivtv2: i2c attach to card #2 ok > [client=tveeprom, addr=50] > Dec 29 20:59:54 mythtv kernel: tuner 2-0061: chip found @ 0xc2 (ivtv > i2c driver #2) > Dec 29 20:59:54 mythtv kernel: ivtv2: i2c attach to card #2 ok > [client=(tuner unset), addr=61] > Dec 29 20:59:54 mythtv kernel: tda9885/6/7: chip found @ 0x86 > Dec 29 20:59:54 mythtv kernel: ivtv2: i2c attach to card #2 ok > [client=tda9887, addr=43] > Dec 29 20:59:54 mythtv kernel: cx25840 2-0044: ivtv driver > Dec 29 20:59:54 mythtv kernel: cx25840 2-0044: cx25843-23 found @ 0x88 > (ivtv i2c driver #2) > Dec 29 20:59:54 mythtv kernel: cx25840 2-0044: unable to open firmware > v4l-cx25840.fw > Dec 29 20:59:54 mythtv kernel: ivtv2: i2c attach to card #2 ok > [client=cx25840, addr=44] > Dec 29 20:59:54 mythtv kernel: wm8775 2-001b: ivtv driver > Dec 29 20:59:54 mythtv kernel: wm8775 2-001b: chip found @ 0x36 (ivtv > i2c driver #2) > Dec 29 20:59:54 mythtv kernel: ivtv2: i2c attach to card #2 ok > [client=wm8775, addr=1b] > Dec 29 20:59:54 mythtv kernel: ivtv2: This is the second unit of a PVR500 > Dec 29 20:59:54 mythtv kernel: ivtv2: Correcting tveeprom data: no > radio present on second unit > Dec 29 20:59:54 mythtv kernel: ivtv2: loaded v4l-cx2341x-enc.fw > firmware (262144 bytes) > Dec 29 20:59:54 mythtv kernel: ivtv2: Encoder revision: 0x02040024 > Dec 29 20:59:54 mythtv kernel: ivtv2 warning: Encoder Firmware can be > buggy, use version 0x02040011 or 0x02050032. > Dec 29 20:59:54 mythtv kernel: ivtv2: Allocate DMA encoder MPEG > stream: 128 x 32768 buffers (4096KB total) > Dec 29 20:59:54 mythtv kernel: ivtv2: Allocate DMA encoder YUV stream: > 194 x 10800 buffers (2048KB total) > Dec 29 20:59:54 mythtv kernel: ivtv2: Allocate DMA encoder VBI stream: > 120 x 17472 buffers (2048KB total) > Dec 29 20:59:54 mythtv kernel: ivtv2: Allocate DMA encoder PCM audio > stream: 455 x 4608 buffers (2048KB total) > Dec 29 20:59:54 mythtv kernel: tuner 2-0061: type set to 57 (Philips > FQ1236A MK4) > Dec 29 20:59:54 mythtv kernel: ivtv2: Initialized WinTV PVR 500 (unit > #2), card #2 > Dec 29 20:59:54 mythtv kernel: > ivtv: ==================== END INIT IVTV ==================== > > lspci -v: > > 01:07.0 Multimedia video controller: Internext Compression Inc iTVC15 > MPEG-2 Encoder (rev 01) > Subsystem: Hauppauge computer works Inc. WinTV PVR-350 > Flags: bus master, medium devsel, latency 64, IRQ 11 > Memory at e0000000 (32-bit, prefetchable) [size=64M] > Capabilities: [44] Power Management version 2 > > 02:08.0 Multimedia video controller: Internext Compression Inc iTVC16 > (CX23416) MPEG-2 Encoder (rev 01) > Subsystem: Hauppauge computer works Inc.: Unknown device e807 > Flags: bus master, medium devsel, latency 64, IRQ 9 > Memory at d8000000 (32-bit, prefetchable) [size=64M] > Capabilities: [44] Power Management version 2 > > 02:09.0 Multimedia video controller: Internext Compression Inc iTVC16 > (CX23416) MPEG-2 Encoder (rev 01) > Subsystem: Hauppauge computer works Inc.: Unknown device e817 > Flags: bus master, medium devsel, latency 64, IRQ 5 > Memory at dc000000 (32-bit, prefetchable) [size=64M] > Capabilities: [44] Power Management version 2 > > _______________________________________________ > ivtv-users mailing list > [email protected] > http://ivtvdriver.org/mailman/listinfo/ivtv-users > _______________________________________________ ivtv-users mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-users
