Agilent Technologies 81250, Руководство по установке

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2 Introduction ParBERT Components Overview
2-6 Agilent 81250 ParBERT Installation Guide, May 2004
The E4809A clock module needs two VXI slots and provides both clocks
to up to 10 data modules.
Clock to expander frames
Master clock to
data modules
Giga clock to
data modules
External CLOCK INPUT
10 MHz REF.
CLOCK INPUT
TRIGGER OUTPUT
START INPUT
Deskew probe connector
Figure 4 E4809A Clock Module
The E4809A clock module uses power splitters for the giga clock outputs.
The output connectors are paired as follows: [1,2] [3,4] [5,6] [7,8] [9,10]
[11,12]. Output #1 is at the top, output #12 is at the bottom.
If only one connector of a pair is used, the unused connector must be
terminated with 50 Ohm to RF ground.
For example:
•
Only one module is in the system and the corresponding giga clock
cable connected to output #1. Output #2 has to be terminated with
50 Ohm to GND.
•
Two modules are in the system and the corresponding giga clock cables
are connected to output #5 and output #6. No other output needs to be
terminated with 50 Ohm to GND.
NOTE