Introduction to the Plug-In Modules for the 34980A 4
Keysight 34980A Mainframe User’s Guide 211
Available Modules, at a Glance
Module Description Max
volts
Max
Current
BW
(MHz)
Scan
ch/sec
Thermal
Offset
Comments
Multiplexer Modules
34921A 40-channel armature multiplexer
w/low thermal offset
±300V 1A 45 MHz 100 <3 μV Temperature
reference
4 current channels
Config as 2- or 4-wire
34922A 70-channel armature multiplexer ±300V 1A 25 MHz 100 <3 μV Config as 2- or 4-wire
34923A 40/80-channel reed multiplexer ±150V 0.5A 45 MHz 500 <50 μV Config as 1-, 2- or
4-wire
34924A 70-channel reed multiplexer ±150V 0.5A 25 MHz 500 <3 μV Config as 2- or 4-wire
34925A 40-channel optically isolated
FET multiplexer
±80V 0.02A 1 MHz 1000 <3 μV Config as 1-, 2- or
4-wire
Matrix Modules
34931A Dual 4x8 armature matrix ±300V 1A 30 MHz 100 <3 μV Backplane expandable
34932A Dual 4x16 armature matrix ±300V 1A 30MHz 100 <3 μV Backplane expandable
34933A Dual/Quad 4x8 reed matrix ±150V 0.5A 30 MHz 500 <50 μV
34934A High Density reed matrix ±100V 0.5A 35 MHz 500 <50 μV
General Purpose Switch Modules
34937A 28-channel Form C and
4-channel 5-Amp Form A
300 V
250 VAC
1 A
5 A
10 MHz N/A <3 μV
34938A 28-channel 5-amp Form A 250 VAC 5 A 1 MHz N/A <3 μV
34939A 64-channel Form A 100V 1A 40 MHz N/A <3 μV
RF and Microwave Modules