Also all channels from DVB-T tuner not working properly (pixeloza).
On my VU+ Ultimo is BH 1.79 and fpga ver. 4.5.
I think (but not sure) problem appear when I've upgrade fpga to ver. 4.5 and BH 1.78. on both tuners DVB-S and DVB-T.
I also have the problem with DVB-T pixelization following the firmware upgrade to FPGA 4.5.
Since the upgrade, AGC seems to constantly vary between 2% and 94% on any DVB-T channel. SNR is a constant 99%.
I found that using a 20dB line attenuator improved the problem on DVB-T although it does not fix it.
In order to test the signal source, I connected a Nova-T USB stick to the Ultimo which it picked up as tuner D, and this tuner appears to be working perfectly.
The configuration is as follows:
- Signal from the terrestrial aerial antenna is split via a Triax AB splitter.
- Feed A goes into a 20dB attenuator (fully wound back) and into the Ultimo DVBT module.
- Feed B goes into the Nova-T directly.
Result:
- Nova-T reads SNR between 64% and 69%, AGC a constant 55%. Picture is perfect.
- Ultimo tuner reads SNR 83% (attenuated), AGC wildly fluctuates between 3% and 96%. Occasional regular glitching and pixelization.
(The reason I attenuate the signal to the ultimo tuner is because it seems to decrease the severity and frequency of the glitching. SNR was 99% without the attenuator.)
As a result, I have disabled the Ultimo DVB-T module and now use the Nova-T for terrestrial reception.
I have mailed VU+ support on many occasions, but have never had a reply.