Comtech EF Data XTRT-400C Operation And Installation Manual page 187

2. In the internal 10 MHz configuration there is a built-in 3 min delay
3. To turn ON the HPA (High Power Amplifier) refer to the chapter
4. Refer to the appendix titled Protocol Addendum, Block
MNC-0000-015
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The output frequency accuracy depends on the accuracy of the refer-
ence and IF frequencies. The determining ratios for the frequency
Bands are:
Ku Band — (12.8 GHz / Reference Frequency) X Reference
•
Offset = Output Offset.
C Band — (4.90 GHz / Reference Frequency) X Reference
•
Offset = Output Offset.
X Band — (6.95 GHz/Reference Frequency) X Reference
•
Offset = Output Offset.
DBS Band — (16.35 GHZ/Reference Frequency) X
•
Reference Offset = Output Offset.
Reference Offset is in MHz.
(factory set) to allow the 10 MHz reference to stabilize. During
this period the transmit indicator light will blink GREEN and
increase blicking rate every 15 seconds until the warm-up is
completed. At the end of the warm-up the transmit indicator light
becomes solid GREEN.
titled Operation. The internal attenuator must be set to minimum
value and gradually increased to achieve rated power.
The input power to the BUC should not exceed -17 dBm to minimize
system spurious output. The maximum safe IF input power level is 10
dBm to avoid damage to the internal converter circuits.
Upconvert for a description of the protocol and system interface
to the BUC. The BUC, and optional internal reference, have an
internal lock detect which senses the presence of the reference
frequency and proper functioning of the internal PPL (Phase
Lock Loop). The absence of either the reference frequency or a
loss of lock in the PLL results in a system fault and the system
internal fault detection circuit disables the HPA high voltage
circuit. The behavior of the reference detection faults is
configurable. See the "External Reference Detection" and lock
behavior options sections
The power levels and frequencies discussed in the
paragraphs above are representative of typical BUC
performance. The specific power levels and
frequencies that the BUC in the HPA that this manual
apply to are identified in the appendix titled Product
Specification.
6 of 10
Operation Addendum, Block Upconverter
Note
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