CPI S5CIA Installation And Operation Manual page 91

B-1
The Block Up-Converter (BUC) allows the user to operate the amplifiers with L-band input
frequencies from 900 to 1825 MHz typically. The L-band input signal can is converted to
microwave bands through the BUC using a frequency of local operation (F
table provides an example of an L-band frequency to Ku-band frequency conversion over two
different Ku-band frequency ranges.
Table B-1. Example of L-Band To Ku-Band Conversion
Ku-Band Output Range (14GHz - 14.5GHz)
Input Frequency
0.95 GHz
1.2 GHz
1.45 GHz
Ku-Band Output Range (13.75GHz - 14.5GHz)
Input Frequency
0.95 GHz
1.325GHz
1.7 GHz
If the BUC Local Oscillator (LO) reference fails or drifts outside of the capture range, a "BUC
alarm" signal will be reported on the optional CPI remote panel or through the supplied "Setup
& Remote software".
The "alarm" will be reported via the CIF port, but the amplifier will take no action.
Alternatively, the "BUC alarm" can be set to a latched "fault" via a user setting in the CIF
protocol (using the supplied utility software or the 1RU remote control). In the event that the
BUC F becomes unlocked, a fault will be reported, and the amplifier will inhibit RF and
LO
shutdown HV to the TWT. A reset command will restore the amplifier to normal operation once
the fault has cleared.
A .01040024 R .3
PP EV
Appendix B
L-Band BUC Option
13.05 GHz
13.05 GHz
13.05 GHz
12.8 GHz
12.8 GHz
12.8 GHz
+FLO
+F
LO
L B BUC O
AND
). The following
LO
Output Frequency
14.00 GHz
14.25 GHz
14.5 GHz
Output Frequency
13.75 GHz
14.125 GHz
14.5 GHz
PTION
B-1