I have a Slingbox Pro HD and need to use the analog tuner to access various locally generated channels in the house for security cameras and satellite dish TV. The problem is I get very short breaks in the picture consisting of horizontal bands either dark or white that flash through the picture about 5 to 10 times a minute. This happens on all analog channels but NOT DIGITAL. In fact the ATSC antenna digital signals are perfect. The slingbox is the only device I have that has this issue. A TV connected to the antenna OUT loop-through on the slingbox does not show these intermittant bands. The box even has the problem when directly connected to a color bar generator on channel 4.
I called support and they shipped me a new unit. But, it has the exact same problem. I ran both of them at the same time and they will both malfunciton in the same way but the flashes do not happen at the same time. In fact, one box can working perfectly while the other is flashing. Also, the units do not malfunction until about 10 to 15 minutes after power is turned on. Even a brief 1 second interruption of power will make them start to work correctly for 10 to 15 minutes.
Here is what I've tried.
Problem happens with stand alone Mac Sling Player or web browser player
Upgraded to the latest firmware 1.4.60 - no effect
Swapped Coax cables - no effect
Supplied RF signal from a color bar test generator - still glitches
Cooled the unit with a fan - no effect.
Wrapped in a towel to get it hotter - no effect.
Used different power packs - no effect.
Power line voltage is 121 volts.
Got replacement unit from Sling - no effect
Below is a frame grab from a video of one of the more severe glitches. They can be black or gray and the bar can be anywhere in the picture from top to bottom. If it happens during vertical sync the picture will bounce up and own once. They happen 5 to 10 times per minute starting about 15 minutes after box power-on.
I also have an old Sling Analog tuner box which works fine - doesn't have this problem at all. But, I can't use it with my Android phone.
So, what is going on here? I suspect there is a bug in the Slingbox Pro HD but I have not seen any other discussions about it. Is it just me?