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Setup and Turn On
In the normal operating condition the modem provides both L-Band
and 10 MHz reference inputs. Other BUC configurations have a
built-in (internal) 10 MHz references which operate as either
standalone or phase locked to the 10 MHz input provided by the
modem. These configureations are shown in Figure 4 and Figure 5.
Use this procedure to setup and operate the BUC.
1 Turn ON modem or signal source and set IF input power to -20
MNC-0000-015
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Figure 3, Detailed BUC Block Diagram
dBm ± 3 dB. Verify that the reference frequency is present and
at 2 ± 5 dBm power level.
These power levels are specified at the input of the HPA and must be
adjusted for any cable loss.
The phase noise of the reference frequency and signal source need to
be verified using Figure 1. All spurious signals such as IF and reference
frequency products must be below -60 dBc.
5 of 10
Operation Addendum, Block Upconverter
Revision F
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