Keysight 34980A - Page 30

1 Introduction to the 34980A
30 Keysight 34980A Mainframe User’s Guide
The figure below shows the external connections required to synchronize the scan
sequence between the 34980A and an external instrument. The 34980A must
notify the external instrument when a relay is closed and fully settled (including
channel delay). The 34980A outputs a Channel Closed pulse. In response, the
external instrument must notify the 34980A when it has finished its measurement
and is ready to advance to the next channel in the scan list. For more information,
see “Scanning With External Instruments” on page 171.
1
5
6
9
5
1
9
6
ABus1 HI
ABus2 HI
ABus3 HI
ABus4 HI
ABus1 LO
ABus2 LO
ABus3 LO
ABus4 LO
Channel Closed
GND
Channel Advance
(In)
(Out)
Analog Bus Connector
Ext Trig Connector
VM Complete Out Ext Trig In
External
DMM
34980A Mainframe