11-09-2017, 05:39 PM
(This post was last modified: 11-09-2017, 05:40 PM by Terry.
Edit Reason: Typo corrected
)
I can remember a few occasions, possibly on VRAT, where there have been requests for VSB modulators - for distribution on both B4 and B5, I think - presumably to accommodate a fixed frequency TRF tuned to B5.
I did play around with an idea which might work and relies on finding an 8MHz channel SAW filter from an old DTT set-top box.
This is as far as I got:
The adjacent channel sound is guaranteed to be =>40dB down anyway, but these were attempts to drop it into one of the sharper notches if possible.
A modulator working at IF would be needed and a mixer to produce the required output channel but it would be a feasible solution.
Any takers to finish the job?
I did play around with an idea which might work and relies on finding an 8MHz channel SAW filter from an old DTT set-top box.
This is as far as I got:
The adjacent channel sound is guaranteed to be =>40dB down anyway, but these were attempts to drop it into one of the sharper notches if possible.
A modulator working at IF would be needed and a mixer to produce the required output channel but it would be a feasible solution.
Any takers to finish the job?
