1 Introduction to the 34980A
18 Keysight 34980A Mainframe User’s Guide
The main system processor also controls activity on the four hardware alarm
outputs and external triggering lines. You can use the alarm output lines to trigger
external alarm lights, sirens, or send a TTL pulse to your control system.
The 34980A provides four 2-wire internal Analog Buses for easier signal routing.
You can route your measurements directly to the optional internal DMM using the
34980A multiplexer and matrix modules or you can connect to external signals via
the Analog Bus connector located on the instrument's rear panel. Since four
2-wire buses are provided, you can dedicate one bus for use with the internal
DMM while using the other three buses for module extensions or additional signal
routing between modules.
Main
System
Processor
GPIB
USB
LAN
Slot
1000
Slot
3000
Slot
8000
Slot
2000
Optional
Internal
DMM
Control
Analog
Bus
Alarms
OUT
IN
External
Trigger
ABUS1
ABUS4
ABUS3
ABUS2
AC
Power
I
Hi Measure
Lo Measure
Hi Sense
Lo Sense
Digital Bus
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