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4.6.4
Other Sub Systems
4.6.4.1
Power Supply
Filtered and Linear regulated supplies
4.6.4.2
NCO (Numerically Controlled Osc.)
Provides calibration signal to FEs for ADC calibration and External
clock calibration
From HTB645
Synchronous
125 MHz
with 10GHz
3.3 to 5V
Translator
Digital control
Control
From AAC
3.3 to 5 V
Translator
4.6.4.3
10GHz Clock
Generates 10GHz system clock from 10MHz oscillator. 10GHz piped
thru system using semi-flex (ADCs and HTB)
Digital Direct
Synthesizer
Filter centered at 32MHz
fout = Fin*(N/M)
Figure 4-18 Cal Clock Block Diagram
Output
RF CAL CH1
On / Off
RF CAL CH2
RF CAL CH3
RF CAL CH4
RF CAL Ext
Theory of Operation 4-19
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Troubleshooting
