技术资料.pdf - 第10页

10 Modul e Descri pti on Comm ent Syste m c ontrol mod ule s 34950A 64 - bit digit al I/ O wit h me mor y and cou nter Eigh t 8 - bit di gital I/O c hann el s with pro gram mabl e pol arit y, thr es holds up t o 5 V, wit…

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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
Module Description Max volts
5
Switch/Carry
current
BW (MHz)
Scan
ch/sec
Thermal
offset
Comments
Multiplexer modules
34921A
40-channel armature multiplexer
w/low thermal offset
± 300 V
1, 6
1A /2A 45 MHz 100 < 3 μV
Temperature reference
4 current channels
Config as 2- or 4-wire
34922A
70-channel armature multiplexer
± 300 V
1, 6
1A /2A
25 MHz
100
< 3 μV
Config as 2- or 4-wire
34923A
40/80-channel reed multiplexer
± 150 V
2, 7
0.5A /1.5A
45 MHz
500
< 50 μV
Config as 1-, 2- or 4-wire
34924A
70-channel reed multiplexer
± 150 V
2, 7
0.5A /1.5A
25 MHz
500
< 50 μV
Config as 2- or 4-wire
34925A
40/80-channel optically isolated
FET multiplexer
± 80 V
peak
6
0.02A 1 MHz 1000 < 3 μV Config as 1-, 2- or 4-wire
Matrix modules
34931A
Dual 4x8 armature matrix
± 300 V
1, 6
1A /2A
30 MHz
100
< 3 μV
Backplane expandable
34932A
Dual 4x16 armature matrix
± 300 V
1, 6
1A /2A
30 MHz
100
< 3 μV
Backplane expandable
34933A Dual/Quad 4x8 reed matrix ± 150 V
2, 7
0.5A /1.5A 30 MHz 500 < 50 μV
Backplane expandable
Config as 1- or 2-wire
34934A Quad 4x32 reed matrix ± 100V
peak
8
0.5A /0.5A 20MHz 500 < 50 μV
Row expansion kit.
Config as 1- or 2-wire
General-purpose modules
34937A
28-channel Form C and
4-channel Form A
± 300 V
1, 6
± 250 VAC
3, 6
1A /2A
5A/7A
10 MHz N/A
< 3 μV
< 3 μV
34938A
20-channel 5-amp Form A
± 250 VAC
3, 6
5A /7A
1 MHz
N/A
< 3 μV
34939A
64-channels Form A
± 100 V
peak
4, 6
1A /2A
10 MHz
N/A
< 3 μV
Notes:
1. Pollution Degree 1 ±300 Vrms or VDC; Pollution Degree 2 ±100 Vrms or VDC
2. Pollution Degree 1 ±150 Vpeak; Pollution Degree 2 ±100 Vpeak
3. Pollution Degree 1 ±250 Vrms or 30 VDC; Pollution Degree 2 ±100 Vrms or 30 VDC
4. Pollution Degree 1 and Pollution Degree 2 ±100 Vrms or VDC
5. Transient overvoltage is defined as a short duration overvoltage of a few milliseconds or less, oscillatory or non-
oscillatory, usually highly damped (IEC 61010-1).
6. 1000Vpk transients.
7. 750Vpk transients.
8. 450Vpk transients.
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Module
Description
Comment
System control modules
34950A
64-bit digital I/O with memory
and counter
Eight 8-bit digital I/O channels with programmable polarity, thresholds up to 5 V, 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 with waveform
memory
Output DC voltage up to ± 16 V or DC current up to ± 20 mA.
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, 2-ch D/A, and
totalizer
Four 8-bit digital I/O channels, two ± 12-V analog outputs, and a 100 kHz gated totalizer.
34959A
Breadboard component
module
Create your own custom designs with access to the +12 V and +5 V supplies, 16 GPIO ports, 4 Analog Bus
drivelines, and 28 relay drivelines.
Alternatively, you may use the 4 Analog Bus drivelines as 4 additional general-purpose relay drivelines.
Refer to Internal DMM / Analog Bus ratings.
Module Description Insertion loss Isolation Freq range VSWR
Input
impedance
Comments
RF and microwave modules
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 /
34945EXT
Microwave switch/attenuator
driver
Can drive up to 64 external switch coils; 32 SPDT switches, 8 multiport switches, 8 attenuators, or your
own combination. Expand with additional 34945EXTs
34946A
Dual 1x2 SPDT terminated
microwave switch
< 0.42 dB
< 0.69 dB
< 0.8 dB
> 85 dB
> 67 dB
> 60 dB
4 GHz or 20
GHz
26.5 GHz
< 1.15
< 1.30
< 1.6
50 Ω
@ 4 GHz
@ 20 GHz
@ 26.5 GHz
34947A
Triple 1x2 SPDT unterminated
microwave switch
< 0.42 dB
< 0.69 dB
< 0.8 dB
> 85 dB
< 0.69 dB
< 0.8 dB
4 GHz or
20 GHz
26.5 GHz
< 1.15
< 1.30
< 1.6
50 Ω
@ 4 GHz
@ 20 GHz
@ 26.5 GHz
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34980A Multiplexer Switch Modules
The 34980A multiplexer modules can be used to connect one of many different points to a single point.
You can connect to an external instrument or scan multiple analog signals to the internal DMM.
Choose from the following features:
•
1-wire, 2-wire, or 4-wire configurations
•
High voltage—up to 300 V, 1 A
•
High density—70 2-wire or 80 1-wire channels
•
Scan up to 1000ch/sec with the 34925A
•
Bandwidths up to 45 MHz
•
Temperature measurements with built-in thermocouple reference junction (34921T)
•
AC or DC current measurements without external shunts
•
Flexible connections via standard 50- or 78- pin Dsub cables or detachable terminal blocks
Figure 2. 34921A 40-channel armature multiplexer with low thermal offset (bank 2)
Voltage
AC/DC
Current
AC/DC
Freq/
Period
Ω 2-
Wire
Ω 4-
Wire
Thermocouple
RTD
2-Wire
RTD
4-Wire
Thermistor
34921A Armature Multiplexer
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
34922A Armature Multiplexer
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
34923A Reed Multiplexer (2-wire)
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
34923A Reed Multiplexer (1-wire)
Yes
No
Yes
Yes
No
Yes
Yes
No
Yes
34924A Reed Multiplexer
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
34925A FET Multiplexer (2-wire)
Yes
No
Yes
Yes
Yes
Yes
No
Yes
No
34925A FET Multiplexer (1-wire)
Yes
No
Yes
Yes
No
Yes
No
No
No
Note: See user’s guide for additional information