Direct TV and on board antenna

I am sorry if I confused anyone... My OTA BATWING antenna requires 12VDC to sent up to the antenna using the same COAX line going up to the roof mounted antenna. I guess it depends where the COAX line is pulled to feed the SAT Receiver... If you use the front "F" type connector on the front of the antenna wall panel then all would be ok... If you pulled the coax that comes down from the roof mounted BATWING antenna and connected that cable to the OTA connection on the SAT Receiver than the roof mounted BATWING will not operate as it will be missing the 12VDC to operate the preamplifier inside the BATWING antenna... My concerns was only to keep the OTA antenna working....

Again sorry to have put information on here that I thought was important for someone to know... Me sorry...

Roy Ken

So much bad and confusing information. I feel really bad for the OP as there is very little chance that he will be able to wade through this mess and get the information he needs to make a viable decision

wa8yxm wrote:
Most DirecTV antennas have a jack for an ANT in (OTA antenna) in addition to the LNB jack.. If that does not work you can put an A/B Switch in the line.

and "I doubt the receiver has a "simple diplexer"."

In the case that wa8yxm described, there is indeed a simple diplexer used at the antenna and another diplexer used in the coax behind the receiver. Both Dish and DTV can do this to allow one coax to be used to get from the antenna to the receiver carrying the sat signals and also the OTA signals. I posted above that I did not know if this is done on RV antennas.

I took the OP's statement of 12 Volts as being correct - my bad. I have never had DTV. Only have Dish...

I've had Dish for many, many years. In those days, Dish had no local installers. You bought your receiver(s) and Dish on-line or by phone and installed it your self. My nearly 20 year old installation has two coaxes running to each receiver and one OTA coax running to each receiver. With the use of both current day Diplexers and Separators there would simply be one coax from the antenna for each receiver.

Sorry for any confusion I caused.

The voltages sent to the LNB are 13 and 19V. SWM is 20V not that the he asked about SWM.

I doubt the receiver has a "simple diplexer". Sat signals are nothing like OTA signals and the receiver has to combine the 2 and then usually supports outputs like component, composite and HDMI. Coax output seems to be fading into the background but supported by some receivers. My last several DTV receivers did not have a coax output maybe as a result of the HD trend.

"Does the OFF AIR INPUT also provide the 12VDC signal that the OTA Antenna needs to operate?"

That was the question and no it does not supply 12V. But virtually all OTA antennas today have an amplifier and they need 12V which was my answer. Non powered OTAs and VHS are as you said "back in the day".

"The 12 volts is power for the LNB(s) and has nothing to do with Diplexing. Yes?"

The receiver supplies 2 different voltages to the LNB depending upon which phased station is selected.

Roy B is the one who asked about the 12v power. Apparently he is getting confused between the sat LNB being 12v powered from the sat receiver, and the amplified OTA antenna being 12v powered by the winegard amplifier in the RV.
The 2 are in no way the same. The question should not have been asked,...it has nothing to do w/ this thread.
As already stated, the OP needs to use the A/B switch built into the sat receiver, or an external A/B switch,.....works very good.

"If it's a amplified antenna then there is a separate power supply in the rig that supplies 12V to the antenna and TV signal to the receiver."

My post was in response to the OTA coax input on the back of the DTV receiver and back in the day on VHS recorders. No 12 volts.

AFTER I posted, a post was made describing an OTA Coax input on the DTV Antenna. I made no representation about that connection and candidly have no idea if an RV would have such a setup.

In the interest of my learning, if not hijacking this thread, I do not see why 12 volts would have anything to do with the OTA signal. The OTA Coax input at the Dish antenna is simply Diplexed with the Sat Signal and thus uses the single Coax from the Antenna to the receiver. No external voltage is required to diplex these two signals. On the back of the receiver is a second (unpowered) Diplexer that separates the Sat and OTA signals into two coax inputs to the back of the receiver.

The 12 volts is power for the LNB(s) and has nothing to do with Diplexing. Yes?

SaltiDawg wrote:
"Does the OFF AIR INPUT also provide the 12VDC signal that the OTA Antenna needs to operate?"

The OFF AIR INPUT is simply a coax from the OTA Antenna. No 12 Volt involved.

If it's a amplified antenna then there is a separate power supply in the rig that supplies 12V to the antenna and TV signal to the receiver.

Moved from Tech Issues forum.

Most DirecTV antennas have a jack for an ANT in (OTA antenna) in addition to the LNB jack.. If that does not work you can put an A/B Switch in the line.