... Channel 1 is the same for "all" @ 974 MHz.
Channel 9 is 1790 MHz, while channel 14 [DSWM] is 1637.39 MHz
Digital SWM technology must really be much more frequency stable than analog.
Doing the math on these numbers, and assuming you can't reduce the necessary transponder bandwidth below the standard 40 Mhz, means a SWM carrier spacing of half that for the ASWM at 51.03 Mhz. With only 11.03 Mhz of that spacing as guard band as opposed to the 62.06 Mhz spacing needed by the ASWM.
A some 82% reduction in guard band spacing!
Overall in comparison then with only 9 SWM channels into 856.48 Mhz total bandwidth needed for the ASWM, compared with 14 channels into a lesser 703.39 Mhz used for the DSWM, means an almost 90% increase in spectral efficiency for the DSWM!
Very impressive for the DSWM in this respect and surprised DIRECTV wouldn't want to ultimately convert to this technology for LNBFs in the mainstream residential installs.
Anyhow, based on VOS' mention of the DSWM hi-lo SWM carrier frequencies here, it ("finally") looks like the answer to the DSWM13 center carrier frequencies are;
Ch. 1) 974 Mhz
Ch. 2) 1025.03 Mhz
Ch. 3) 1076.06 Mhz
Ch. 4) 1127.09 Mhz
Ch. 5) 1178.12 Mhz
Ch. 6) 1229.15 Mhz
Ch. 7) 1280.18 Mhz
Ch. 8) 1331.21 Mhz
Ch. 9) 1382.24 Mhz
Ch. 10) 1433.27 Mhz
Ch. 11) 1484.30 Mhz
Ch. 12) 1535.33 Mhz
Ch. 13) 1586.36 Mhz
Ch. 14) 1637.39 Mhz