NDS Standard IRD analog audio only problem

[beast]

I have like a audio skipping problem , like a CD skipping from all 4 analog channels of the NDS Alteia professional receiver circa 1999. The video is unaffected , it is only in the analog audio I have this problem..
The downlink signal is using a tiernan tandberg 4 2 2 encoding stream. Another receiver that is Tandberg which is a almost identical to the Alteia receiver dosen`t have the skipping audio problem so I concluded it wasn`t a feed source issue but a problem with my alteia IRD or menu setting.
Is anyone familiar with the NDS standard Alteia M2/PSR/942 receiver that could point me in the right area of the menu or does it need a software upgrade which was also suggested .
I already tried the menu 13 setting and set the rate buffer to small but that didn`t help me and it still does the like CD skipping problem. The only difference is the Tandberg is model M2/PSR/942C and the other is M2/PSR/942 with no C on the end but obviously there is still differences on how the audio is decoded from the Tandberg and Alteia.

Thanks

[BGonaSTICK]

Hi. Welcome to the forum.

Where are you and which channels/frequency/satellite are you talking about?

I don't know of any 4:2:2 NDS encrypted analogue transmissions :?

Is it encrypted?

[beast]

I`m in Canada and these are non encrypted C-band transmissions on AMC 3 bird., free in the clear NTSC
vertical polarity with the following by the TV uplink mobile ;
3771mhz. downlink
Encoder Used : Tiernan/Tandberg 4:2:2.
My Video is good , its just the audio that has this problem of like a skipping CD. Power cycling my IRD fixes it for less than minute but it always returns again.
Looks like a software patch is needed according to customer support...
.

[BGonaSTICK]

Sorry m8, I know very little about C-band stuff. There's not really enough of it in Europe to justify buying all the extra hardware

[beast]

Have confirmed the problem with others .Because under certain transport streams the encoder in the Alteia has a problem servicing interrupts and this results in chopping / break-up / glitting the audio like a CD skipping audio effect.
Tandberg encoders such as when using to uplink NTSC material and audio send out a sequence of audio frames with each PES header. The Alteia will see one PTS for many audio frames of the Tandberg. The Alteia will then have a problem if there are less than say 3 audio frames per PTS. This it is receiving effectively receiving PTS at a far higher rate than the Tandberg stream. The extra PTS is likely causing a double interrupt in the audio processing routines in the Alteia . The fix is software upgrade the Alteia IRD not a easy process to something on V2.8 as apparently it was released in 2001 and was addressing this problem of this Tandberg encoding.

[BGonaSTICK]

We appreciate you filling in the gaps for us