I Have a SL3 LNB and a HR21-100. During configurattion test it states Bbc not required. Is this Correct? IS the HR21-100 compatible with the SWM SL3S4NR2-02? Have a sl3 lnb with 1 port. Connect sat finder, one end to lnb other to hr 21 able to find sat. Inset PI and no difference in strength while moving ant in az. Tilt and elevation good. Do I actually need the PI?