Comtech EF Data KST-2000A/B - Manual (Page 74)

Ku-Band Satellite Transceiver Revision 9
Operation MN/KST2000AB.IOM
3–26
72 MHZ
REF
L03
16.830
GHZ
13.750 to
14.500 GHZ
2330-
3080 MHZ
Figure 3-11. S to Ku-Band Up Converter Module
The S- to Ku-Band up converter module (Figure 3-11) performs block up conversion of
the 2330 to 3080 MHz signal input to an output in the range of 13.750 to 14.500 GHz.
This is done by mixing the IF input with a fixed frequency Dielectric Resonator Oscilla-
tor (DRO), operating at 16.830 GHz. The correct sideband of this process is amplified
and filtered before being applied to the isolated output of the module.
3.9 Ku- to L-Band Down Converter Description (KST-2000A)
The Ku- to L-Band converter (Figure 3-16) accepts an RF signal in the range of 10.95 to
12.75 GHz, and translates it to an output frequency in the range of 950 to 1700 MHz. It
does this by pre-selecting the RF frequency range and block converting using one of
three phase locked DROs.
The DROs operate at 10.0, 10.75, and 11.3 GHz, and are automatically selected when the
down converter is tuned. The down converter can supply +15V through its RF input con-
nector to power an external LNA. The LNA power can be turned on or off via remote
M&C command. The down converter also provides an additional L-Band output for sig-
nal monitoring purposes.
This module is not in-place for the KST-2000B as block down conversion is performed
by the LNB.
10 MHZ
REF
10.95 to
12.75 GHZ
+15V
LNA PWR
11.3 GHZ
10.75 GHZ
10.0 GHZ
950-
1700 MHZ
L BAND
MONITOR
950-1700 MHZ
Figure 3-12. Ku to L-Band Down Converter Module Block Diagram