622 puts DC on SAT connectors? (IR injection)

I've never tried it but I don't think it will work. The LNBs on the Dish itself need power as does the switch (es) in line or contained in the LNB, that's why it injects DC. IIRC there is also a DC signal change for odd/even transponders, etc. I suppose it's possible that your IR remote side would work by tapping the power from the 622 but you may overload the power supply on the 622 or cause any other number of problems. I'm no expert by any means but my limited knowledge says find a different solution .

Can you supply power to the remote side locally? This would mean putting in a DC block between the TV2 / SAT cable and your Xantech unit and then putting in a DC injector with 12 Volts on it to power the unit. I have no experience whatsoever with that device so I can't promise that would work, but theoritically I think it would.

I don't know how your diplexer is labeled, but it will pass DC on the Sat terminal and block it on the Ant/RF/OTA/... terminal. You can put the power after the diplexer at the remote end but what frequency will it be using to send the signals? The diplexer divides the signal at 950MHz. Anything above that goes to the Sat connection and anything below that goes to the RF connection.

The 13/18 VDc does toggle (a blazing 8 Hz for an 8 bit command) if the switch involved is legacy instead of DP and then uses one of the voltages to select odd/even transponders. If connected to a DP switch, the voltage is constant (and I think 19 VDc) and you MIGHT have better luck tapping it to power your unit.

I do have a more basic question though - you mention TV2. You aren't trying to send IR commands for TV2 to the 622 are you? TV2 is UHF Pro only. There are other ways to improve the TV2 reliablilty - or to get remote control of TV1 via UHF.

CABill said:

I don't know how your diplexer is labeled, but it will pass DC on the Sat terminal and block it on the Ant/RF/OTA/... terminal. You can put the power after the diplexer at the remote end but what frequency will it be using to send the signals? The diplexer divides the signal at 950MHz. Anything above that goes to the Sat connection and anything below that goes to the RF connection.

The 13/18 VDc does toggle (a blazing 8 Hz for an 8 bit command) if the switch involved is legacy instead of DP and then uses one of the voltages to select odd/even transponders. If connected to a DP switch, the voltage is constant (and I think 19 VDc) and you MIGHT have better luck tapping it to power your unit.

I do have a more basic question though - you mention TV2. You aren't trying to send IR commands for TV2 to the 622 are you? TV2 is UHF Pro only. There are other ways to improve the TV2 reliablilty - or to get remote control of TV1 via UHF.

Click to expand...

* I am not trying to send any IR commands for TV2 to the 622; rather I want to be able to send IR commands to other audio components in another part of the house.

* The frequency used by the xantech system is somewhere between 30-100 Khz, so it would definitely go on the antenna side of the diplexer, so it would not interfere with the 622 frequencies.

* For DC power, the IR injector on the TV2 end does use an external 12V supply, but the IR coupler on the 622 end needs 12V on the coax (does not have an option for an external supply). Maybe the 622 voltage would work and maybe not, if it did work a DC bypass could be added to the diplexer on the 622 end of the cable.

Due to the third item above, I'm going to bite the bullet and run another coax cable so that the TV2 coax no longer has SAT diplexed on it. It is easier than trying to debug something that may not work and might damage the IR coupler....Thanks for the suggestions and advice.