User`s guide

7
Mix and match 34980A modules to
create your own custom configuration
The 34980A mainframe holds up to eight plug-in modules. Mix and match them to create a custom system to meet your switching and
system control needs. You can easily add or replace modules as your needs change.
Table 1. 34980A modules at a glance
Max Switch/Carry BW Scan Thermal
Module Description volts current (MHz) ch/sec offset Comments
Multiplexer modules
34921A 40-channel armature multiplexer w/low ± 300 V 1A/2A 45 MHz 100 < 3 uV Temperature reference
thermal offset 4 current channels
Config as 2- or 4-wire
34922A 70-channelarmaturemultiplexer ±300V 1A/2A 25MHz 100 <3uV Configas2-or4-wire
34923A 40/80-channel reed multiplexer ± 150 V 0.5A/1.5A 45 MHz 500 < 50 uV Config as 1-, 2- or 4-wire
34924A 70-channelreedmultiplexer ±150V 0.5A/1.5A 25MHz 500 <50uV Configas2-or4-wire
34925A 40/80-channel optically isolated ± 80 V 0.02A 1 MHz 1000 < 3 uV Config as 1-, 2- or 4-wire
FET multiplexer
Matrix modules
34931A Dual4x8armaturematrix ±300V 1A/2A 30MHz 100 <3uV Backplaneexpandable
34932A Dual4x16armaturematrix ±300V 1A/2A 30MHz 100 <3uV Backplaneexpandable
34933A Dual/Quad4x8reedmatrix ±150V 0.5A/1.5A 30MHz 500 <50uV Backplaneexpandable
Config as 1- or 2-wire
34934A Quad4x32reedmatrix +/-100V 0.5A/0.5A 20MHz 500 <50uV Rowexpansionkit.
Config as 1- or 2-wire
General-purpose modules
34937A 28-channelFormCand +/-300V 1A/2A 10MHz N/A <3uV
 4-channelFormA +/-250VAC 5A   <3uV
34938A 20-channel5-ampFormA +/-250VAC 5A/8A 1MHz N/A <3uV
34939A 64-channelsFormA +/-100V 1A/2A 10MHz N/A <3uV
RF and microwave modules
Insertion Freq Input
Module Description loss Isolation range VSWR impedence Comments
34941A Quad1x450ohm3GHzRFmultiplexer 0.6dB >58dB 3GHz <1.25 50Ω @1GHz
34942A Quad1x475ohm1.5GHzRFmultiplexer 0.6dB >60dB 1.5GHz <1.35 75Ω @1GHz
34945A/ Microwave switch/attenuator driver Can drive up to 64 external switch coils; 32 SPDT switches,8 multiport switches,
34945EXT 8 attenuators, or your own combination. Expand with additional 34945EXTs.
34946A Dual1x2SPDTterminated <0.42dB >85dB 4GHzor <1.15 50Ω @4GHz
 microwaveswitch <0.69dB >67dB 20GHz <1.30  @20GHz
  <0.8dB >60dB 26.5GHz <1.6  @26.5GHz
34947A Triple1x2SPDTunterminated <0.42dB >85dB 4GHzor <1.15 50Ω @4GHz
 microwaveswitch <0.69dB >67dB 20GHz <1.30  @20GHz
  <0.8dB >60dB 26.5GHz <1.6  @26.5GHz
System control modules Description
34950A 64-bit digital I/O with memory Eight 8-bit digital I/O channels with programmable polarity, thresholds up to 5 V,
and counter with handshaking protocols and pattern memory. Two 10 MHz frequency counter and
programmable clock output to 20 MHz.
34951A 4-channel isolated D/A converter Output DC voltage up to ± 16 V or DC current up to ± 20 mA.
with waveform memory Output waveforms with a 200 kHz update rate and 16 bits of resolution.
Use on-board memory to create point-to-point waveforms with more than 500,000 points.
34952A Multifunction module with 32-bit DIO, Four 8-bit digital I/O channels, two ± 12-V analog outputs, and a 100 kHz gated totalizer.
2-ch D/A and totalizer
34959A Breadboardmodule Createyourowncustomdesignswithaccesstothe+12Vand+5Vsupplies,
16 GPIO ports and 28 relay drive lines.