HP 83487A User Manual page 14

C A U T I O N
C A U T I O N
Getting Started
The HP 83487A Optical/Electrical Plug-In Module
Trigger
The external trigger level range for this plug-in module is ±1 V. The trigger
source selection depends on the plug-in module location. For example, if the
plug-in module is installed in slots 1 and 2, then the trigger source is listed as
trigger 2. If it is installed in slots 3 and 4, then the trigger source is listed as
trigger 4.
The maximum safe input voltage is ±2 V + peak ac (+16 dBm).
The input circuits can be damaged by electrostatic discharge (ESD).
Therefore, avoid applying static discharges to the front-panel input connectors.
Before connecting any coaxial cable to the connectors, momentarily short the
center and outer conductors of the cable together. Avoid touching the front-
panel input connectors without first touching the frame of the instrument. Be
sure that the instrument is properly earth-grounded to prevent buildup of
static charge. Refer to
1-6
"Electrostatic Discharge Information" on page 5-12.