Datasheet
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AC characteristics
Bandwidth at terminal block
4
45 MHz
25 MHz
45 MHz
5
/4 MHz
10 MHz 1-wire
25 MHz
5
/4 MHz
11
1 MHz
Crosstalk at terminal block (ch-ch)
4
300 kHz
- 75 dB
- 75 dB
- 75 dB
- 75 dB
Not
recommended
for RF signal
switching
1 MHz
20 MHz
45 MHz
- 75 dB
- 50 dB
- 40 dB
- 75 dB
- 50 dB
- 75 dB
- 50 dB
- 40 dB
- 70 dB
- 45 dB
Capacitance at terminal block
HI-LO
LO – earth
150 pF
150 pF
250 pF
200 pF
130 pF
120 pF
200 pF
170 pF
100 pF
300 pF (600 pF
1-wire)
General Characteristics
Relay life, typical
No load
10 V, 100 mA
Rated load
100 M
10 M
100 k
100 M
10 M
100 k
1000 M
10 M
10 k
1000 M
10 M
10 k
Unlimited within
banks
Unlimited within
banks
Unlimited within
banks
Scanning speeds 7
100 ch/sec
100 ch/sec
500 ch/sec
500 ch/sec
1000 ch/sec
Open/ close time, typical
4 ms/4 ms
4 ms/4 ms
0.5 ms/0.5 ms
0.5 ms/0.5 ms
0.25 ms/0.25 ms
Analog bus backplane
Yes
Yes
Yes
Yes
Yes
1. DC or AC RMS voltage, channel-to-channel or channel-to-earth
2. Peak voltage, channel-to-channel or channel-to-earth
3. Into analog bus. System errors are included in the internal DMM measurement accuracy specifications
4. 50 Ω source, 50 Ω load, differential measurements verified with 4-port network analyzer (Sdd21)
5. With input resistors bypassed. Bypassing resistors will reduce lifetime of relays. See the rated load relay life characteristics.
6. Limited to 6 W of channel resistance power loss per module
7. Speeds are for 2-wire ohms or DCV, 4 1/2 digits, delay 0, display off, autozero off, and within bank
8. DC or peak AC current
9. Ambient temperature < 30°C
10. Includes 0.5°C temperature reference sensor and 0.5°C terminal block isothermal gradient error, measured under worst case loading of the mainframe; see
User’s Guide for information on supported external reference sensors
11. With input protection resistors: 2 x 100 Ω ±5%; 0.5W; TC = ±200 ppm/°C. The series resistance of the 34923/24/25 limits the use of the 100 Ω range.
12. Channel resistance is typically < 1.5 Ω but can go as high as 50 Ω when a channel is used in measurement applications with < 10 mA load current.
Increased relay channel resistance for measurements with load currents below 10 mA can occur on cards that have been out of service or following relay
inactivity for periods of greater than 1 week. Switching relays for 2K cycles prior to use may reduce the variation in channel resistance. Applies to the
34921A and 34922A. Keysight recommends the use of 4-wire Ohms for resistance measurements. For high accuracy voltage measurements, select the
DMM input resistance setting of >10 G ohms to minimize the impact of relay contact resistance.
34980A matrix switch modules
The 34980A matrix modules are full crosspoint matrices that allow you to connect any row to any column.
This is a convenient way to connect multiple test instruments to multiple points on a device under test.
Choose from the following features:
• Latching armature relays—300 V, 1 A
• High-speed reed relays—150 V, 0.5 A
• Configurable dual 4x8, dual 4x16 or quad 4x32 modules
• Single-wire configuration (34933A or 34934A)
• High density matrix with automatic surge protection and row disconnect for flexible measurements
(34934A)
• Analog bus expandable rows to create larger matrices
• (34931A, 32A, 33A)
• Connections via standard 50 or 78-pin D-sub cables or detachable terminal block