I'm an A/V guy, not a sat installer. Directv originally installed a sl 5 lnb dish and hooked it to three receivers,....old sd unit, a HR-20 and a DVR probably HR 22. I added two HR 22's the client bought at Costco, requiring a MS upgrade.
The switch is a powered 6 x 16. ( had my 6's and 8's all...