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Hghi transport and continuity issues with USB DVB-C tuner

Added by Ziggo Customer over 1 year ago

Dear TVH users,

We're having an issue with a set-up where we're using two "generic" Astrometa DVB-T2/T/C USB dongles with the Sony CXD2837 frontend. These are directly connected to a brand name mini PC, provider's cable is split using a splitter to the two dongles. TVH is reporting a signal strength of 76dBm and SNR of 33 dB, sufficient I'd think. However the signal is almost unusable when trying to stream, the status page reports high amount of transport and continuity errors. I've tried disabling each USB dongle to test if one of them is defect, also tried to use "Force old status", increased the status period to 2000ms, but the issues remain.

What could be the problem here? Defective adapters? Unsupported adapters? TV Headend issue?

Screenshot 2023-03-19 at 21.54.21.png (21.1 KB) Screenshot 2023-03-19 at 21.54.21.png

Replies (4)

RE: Hghi transport and continuity issues with USB DVB-C tuner - Added by Jonas Lang over 1 year ago

What hardware/OS are you running TVH on.

RE: Hghi transport and continuity issues with USB DVB-C tuner - Added by Ziggo Customer over 1 year ago

It's a Dell OptiPlex 7050
$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=22.04
DISTRIB_CODENAME=jammy
DISTRIB_DESCRIPTION="Ubuntu 22.04.2 LTS"
$ lspci
00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers (rev 05)
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 630 (rev 04)
00:14.0 USB controller: Intel Corporation 200 Series/Z370 Chipset Family USB 3.0 xHCI Controller
00:14.2 Signal processing controller: Intel Corporation 200 Series PCH Thermal Subsystem
00:15.0 Signal processing controller: Intel Corporation 200 Series PCH Serial IO I2C Controller #0
00:16.0 Communication controller: Intel Corporation 200 Series PCH CSME HECI #1
00:16.3 Serial controller: Intel Corporation Device a2bd
00:17.0 SATA controller: Intel Corporation 200 Series PCH SATA controller [AHCI mode]
00:1f.0 ISA bridge: Intel Corporation 200 Series PCH LPC Controller (Q270)
00:1f.2 Memory controller: Intel Corporation 200 Series/Z370 Chipset Family Power Management Controller
00:1f.3 Audio device: Intel Corporation 200 Series PCH HD Audio
00:1f.4 SMBus: Intel Corporation 200 Series/Z370 Chipset Family SMBus Controller
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (5) I219-LM
$ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 15f4:0131 HanfTek Astrometa DVB-T/T2/C FM & DAB receiver [RTL2832P]
Bus 001 Device 002: ID 15f4:0131 HanfTek Astrometa DVB-T/T2/C FM & DAB receiver [RTL2832P]
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

RE: Hghi transport and continuity issues with USB DVB-C tuner - Added by Jonas Lang over 1 year ago

At first glance it looks like your problem is pointing towards signal quality. Can you remove the splitter and make a direct connection to just one of your USB dongles.

RE: Hghi transport and continuity issues with USB DVB-C tuner - Added by Flole Systems over 1 year ago

If it's not a proper splitter it's missing the decoupling, that would look like you described it.

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