Example Of Using Threshold Searching - KNS Ku-BAND TX Installation And Operation Manual

LO( GHz) LNB Voltage
9.75 13VDC
10.00 13VDC
10.75 18VDC
11.30 18VDC
6.4

Example of Using Threshold Searching

If your desired carrier is not a DVB, you can use threshold searching using your modem.
Please refer to Figurse 6-4 and 6-5.
Desired satellite parameters
Satellite: Galaxy 18
Satellite Longitude: 123°W
Frequency TP: 12,140MHz
Polarity: Horizontal (Down link)
System encryption: NTSC
Symbol Rate: ?
NOTE: If your desired desire satellite does not support the DVB, you will not be able to
track the satellite using the DVB carrier lock. In this case, you can try threshold searching
methods. Best searching reference is the 'External lock & C/N threshold' using modem
when desired carrier isn't a DVB.
NOTE: C/N of 'External lock & C/N threshold' is the AGC of modem. When define the
threshold value, operator has to check the value on LCD of ACU and then decide higher
value than noise level as threshold.
22KHz Tone
OFF
ON
OFF
ON
Table 6-5 Specifications of Universal LNB (Type N)
KU-Band In (GHz)
10.70 ~ 10.95
10.95 ~ 11.70
11.70 ~ 12.25
12.25 ~ 12.75
59
L-band Out (MHz)
950 ~ 1150
950 ~ 1700
950 ~ 1500
950 ~ 1450