User`s guide

Table Of Contents
392 Agilent E5505A User’s Guide
17
System Specifications
If either of these conditions are not met, system measurement accuracy may
be reduced.
Tuning
The tuning range of the voltage controlled oscillator (VCO) source must be
commensurate with the frequency stability of the sources being used. If the
tuning range is too narrow, the system will not properly phase lock, resulting
in an aborted measurement. If the tuning range of the VCO source is too large,
noise on the control line may increase the effective noise of the VCO source.
Computer
The minimum requirements for the E5505A phase noise measurement system
CPU are:
Pentium® microprocessor (2.4 GHz or higher recommended)
1 GB of memory (RAM)
40 GB hard disk
Microsoft® Windows® XP Pro
Super Video Graphics Array (SVGA)
Two GPIB Interface Cards
At least three available PCI slots (for GPIB interface card and PC digitizer
card)
NOTE
In addition, if you have a know source, the source’s uncertainties must bee added to the
system specifications.