(1) The Lifetime's loop-through output is connected to the Toshiba's Ku input. I've used the Lifetime to point to the satellite I want, and tuned to a stored digital channel with the same polarity as the analog channel I want to view on the Toshiba. Is this the best way to do it?
Yes, it is
(2) In the above scenario, am I right in assuming the Lifetime must be on while I watch the analog feed on the Toshiba, and that the correct polarity must be set by the Lifetime?
Yes, that's correct. I recommend you use a DC block between your analog and lifetime. You can get it at Radio Shack, $2/each.
(3) Is there an "always on" analog feed on Ku somewhere that I can go to check my setup and equipment operation? I see the SES Americom test card listed on AMC 9, but the problem there is I don't have any channels with V polarity on that satellite stored in the Lifetime, so I can't set the LNB accordingly to allow the Toshiba to see the analog feed. Don't see any other permanent analog feeds on Ku anywhere.
AMC9 has one. During weekend, lot of analog feeds are on SBS6.
(4) Is the Toshiba expecting to see a different Ku LNB than the one I have? I have a universal, 9750/10600. The Toshiba documentation doesn't say, but I'm guessing it's looking for a 10750 (11,700 - 950). How would I adjust the freq I'm trying to tune on the Toshiba to account for this discrepancy? Does this question make any sense?
The problem is right here. I have a Toshiba 120 which I could not figure out how to change the defaul LO which is 10750. Setting up the analog receiver is kind of complicated since most of them are 5 years old or more...:-)
Can't speak for other brands, but the Toshiba 120 requires to key in L-band so you need convert the freq to L-band.
Check out the link below for the instruction of how to set up the Toshiba 100/120. Hopefully, it can be used for your analog model.
http://www.satellitehelp.com/tosh_100_index.asp#Figure1
Good luck,
Michael