Agilent Technologies X Series Manual page 82

About the Instrument
Rear-Panel Features
CXA with Option PC3 (S/N MY/US/SG49370546 or higher)
CXA (for S/N less than MY/US/SG49370546)
Item
# Name
1 EXT REF IN
2 GPIB
82
Input for an external frequency reference signal:
For CXA – 10 MHz.
A General Purpose Interface Bus (GPIB, IEEE 488.1) connection that can
be used for remote analyzer operation.
Description
Chapter 2