Agilent-technologies VXI E1439 Manual do Utilizador Página 223

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Module Description
Block diagram and description
Clock Generation
The source for a clock signal is the 95 MHz crystal oscillator inside the E1439. This oscillator can
free run or be locked to an external reference signal through the front-panel BNC "Ext
Clock/Ref". This signal can be TTL, ECL, or sine wave. The oscillator can also be locked to a
reference routed via the backplane. A 2.5 MHz reference signal is available to be routed out the
front panel or the backplane to lock additional E1439s.
IF
IF
Baseband
Baseband
Amplifier
12 dB
Lowpass
Filter
0-36 MHz
Bandpass
Filter
52-88 MHz
Attenuator
1-16 dB
Attenuator
1-16 dB
Amplifier
6dB
95 MHz
Lowpass
Filter
0-43 MHz
Sampling
ADC
Offset
DAC
To Digital Filters
Highpass
Filter
52 MHz
DC
AC
Signal
Bypass
!
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