No, you cannot.
In order to "split lines" with your existing LNB, you'd need all 4 lines going to a multiswitch, and separate lines from the multiswitch to each tuner.
OR
You would need to change over to SWM equipment. Assuming the HR20 is the only receiver you have, you could get a 5-LNB SWM-enabled LNB and power inserter. This LNB only has one output, which is run to the power inserter, and from the power inserter, is split as necessary to feed a single coax to each receiver. On a dual-tuner recever like your HR-20, once coax from a SWM to the Tuner 1/FTM input will run both tuners. A SWM LNB supports up to 8 tuners.
You could also get an external SWM-8, but from what you describe, the SWM LNB would be much easier, provided all your receivers are SWM compatible.
In order to "split lines" with your existing LNB, you'd need all 4 lines going to a multiswitch, and separate lines from the multiswitch to each tuner.
OR
You would need to change over to SWM equipment. Assuming the HR20 is the only receiver you have, you could get a 5-LNB SWM-enabled LNB and power inserter. This LNB only has one output, which is run to the power inserter, and from the power inserter, is split as necessary to feed a single coax to each receiver. On a dual-tuner recever like your HR-20, once coax from a SWM to the Tuner 1/FTM input will run both tuners. A SWM LNB supports up to 8 tuners.
You could also get an external SWM-8, but from what you describe, the SWM LNB would be much easier, provided all your receivers are SWM compatible.
