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Chapter 7 Plug-in Modules
44478A/B 1.3 GHz Dual 4-to-1 MUX Modules
4
7
Cabling Considerations
RG-223/U cable is recommended. Ready-made cables (BNCs on both
ends) are available from Agilent using the following part numbers:
•
8120-1838: 30 cm (12 in.), 50 Ω coaxial
•
8120-1839: 61 cm (24 in.), 50 Ω coaxial
•
8120-1840: 122 cm (48 in.), 50 Ω coaxial
•
5062-6452: 30 cm (12 in.), 75 Ω coaxial
Always use shielded coaxial cables with the characteristic impedance of
the module used (50 Ω or 75 Ω). Keep cables as short as possible,
especially in high frequency circuits or pulse circuits where a rise/fall
time of < 50 nS is critical. Long cables can add considerable delay time
which can cause timing problems. All test equipment such as counters,
spectrum analyzers, oscilloscopes, etc., must be terminated in the
characteristic impedance to minimize reflection loss.
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