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P300H P300 Series Modem Installation and Operating Handbook Page 113
Rx/LNB: 1:LNB Type 2:DC & References
3:SHF Frequencies
Change, BUC/LNB, Rx/LNB Menu
LNB Attached[?] 1=None 2=Other 3=3.625-4.2G 4=10.95-11.45G
5=10.95-11.7G 6=11.2-11.7 7=11.7-12.2 8=12.25-12.75
Change, BUC/LNB, Rx/LNB, LNB Type Menu
6.12.7 Change, BUC/LNB, Rx/LNB Menu
Options for LNB Type, and DC & References are only offered on L-Band modems.
Each option is defined in the following paragraphs.
6.12.8 Change, BUC/LNB, Rx/LNB, LNB Type Menu
The table below specifies the parameters for the listed LNB types:
Description Low Frequency Limit High Frequency Limit Frequency Shift
None Modem IF +/- limits around user set SHF Frequency Shift
Other Modem IF +/- limits around user set SHF Frequency Shift
Std C 3.635 GHz 4.200 GHz * 5150 MHz
Std Ku 10.950 GHz 11.450 GHz 10000 MHz
10.95-11.7G 10.950 GHz 11.700 GHz 10000 MHz
11.2-11.7G 11.200 GHz 11.700 GHz 10250 MHz
11.7-12.2G 11.700 GHz 12.200 GHz 10750 MHz
12.25-12.75G 12.250 GHz 12.750 GHz 11300 MHz
As with the BUC’s, the difference between None and Other is that with Other the operator can configure
the modem to supply a 10MHz reference and a DC PSU to the LNB. With None, these options are not
available.
* Note the `Std C` LNB uses a high side Local Oscillator (LO), and the received SHF Frequency is LO - IF
Frequency (not LO + IF as with most other bands). This is somewhat academic as from V3.85 onwards this
is handled automatically and the modem displays the correct SHF frequency. Note however that with the
LNB Type set to None or Other, there is no way to manually enter a SHF offset which uses a High Side
LO.