[mythtv-users] Reds gone from HDPVR recordings

[Will Dormann]

On 3/25/22 9:22 AM, Barry Martin wrote:
> 
> DryHeat122:
> 
>> Does anyone know if there is a way to see if I'm getting a signal out of
>> the red channel on my cable box *without *connecting it to a monitor with
>> composite inputs (which I don't have)? Should I be able to measure a
>> voltage that would be absent if it were dead, for example?
> 
> The swapping cables was a good suggestion!  Are we certain the composite 
> input of the monitor is good? 


Indeed.   There are multiple places where the Pr signal could be dropped:
1. Inside the cable box before it gets to the header
2. Along the cable between the cable box and the HD-PVR
3. Inside the HD-PVR before it gets to the encoder

To eliminate variables, I'd play a recording file on a known-working 
computer system.  (e.g. copy it to a laptop)

If you're still missing red after replacing the Pr cable, then you've 
probably eliminated option 2. above.   Which leaves 1., 3., or anything 
outside of the analog realm.  And troubleshooting those would require a 
bit more analysis and/or tools/components available for testing.


-WD