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Proven diplexers for use with SWM?
Posted 12 August 2008 - 08:28 PM
________________OUTSIDE | INSIDE ____________________________________________
Slimline --4 lines--> SWM8 --|---> PI ---> Diplexer ---> SWS4 (----> Diplexer ---> HDDVR)x2
OTA antenna ------------------|------------>
I chose an SWS4 so that I could add another up to 2 HDDVRs later without much trouble.
Anybody know which diplexers are proven for this setup? Thanks for any help or points in the right direction.
Posted 13 August 2008 - 07:28 AM
It is more difficult to successfully diplex two-way cable with SWM than to diplex off-air antenna with it, because the zone between the SWM return frequency of 2.3 MHz, and the cable companies sub band return signals, which can be as low as about 10 MHz, is so small that it requires that the lowpass and highpass contours within the diplexer be carefully engineered so as to not compromise either one.
Other posters here have had good luck using Channel Master and Radio Shack diplexers to combine SWM with off-air, but at present, I don't know of any product other than the NAS 9501 that is optimized for combining SWM with two-way cable's sub-band return signal.
Posted 13 August 2008 - 07:35 AM
Posted 13 August 2008 - 02:41 PM