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A7 PCB
10 MHz Timebase
The 10 MHz system clock is based on an OCXO mounted on the A7
PCB. The A7 PCB also contains a fixed 2.42 MHz Local Oscillator and
an 80 kHz calibration signal. The 80 kHz calibration signal is periodi-
cally sent to the A3, A4, and A6 PCBs for self-calibration of IF ampli-
fier circuits. (This occurs during the time when the message, “Cali-
brating IF, please wait” is displayed on the VNA.)
THEORY OF OPERATION
ANALOG SUBSYSTEM ASSEMBLIES
37XXXD MM
3-15
Содержание 37 D Series
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Страница 14: ...1 2 37XXXD MM Figure 1 1 Series 37XXXD Vector Network Analyzer System...
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Страница 35: ...REPLACEABLE PARTS PARTS ORDERING INFORMATION 37XXXD MM 2 9 2 10 Figure 2 2 Signal Source Parts Location Diagram...
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Страница 143: ...REMOVE AND REPLACE SIGNAL SOURCE MODULES 37XXXD MM 8 23 Figure 8 11 Signal Source Module Assemblies Removal Details...
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Страница 160: ...D 4 37XXXD MM ME7808 BLOCK DIAGRAM ME7808 BROADBAND SYSTEM MAINTENANCE Figure D 1 ME7808B C Block Diagram...
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