Notice the red "a" by KDVR on your tvfool report.
You might be having a problem with adjacent channel interference to KDVR FOX on real CH32 from KMAS on CH33. Your tvfool report lists analog KMAS-LP on CH33. If you look at rabbitears.info you will see that it is now active digital KMAS-LD:
http://www.rabbitears.info/market.ph...callsign=67545
ATSC Recommended Practice:
Receiver Performance Guidelines
Document A/74:2010, 7 April 2010
http://www.atsc.org/cms/standards/a_74-2010.pdf
page 15 shows a chart for adjacent thresholds:
The difference in strength between the two channels is now uncertain because KMAS is now digital and seems to be at a new location, but the more directional DB8e UHF antenna suggested by GroundUrMast might help.