Datasheet

Page 20
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Modules Specifications
The Keysight 34970A/34972A accuracy specifications already
include the switching offset and reference junction errors shown
below. These errors are listed separately for determining system
error with external measurement devices.
Up to three modules, in any combination, can be inserted
into a single mainframe. The 34970A/34972A’s internal DMM
connections are accessible only through the 34901A, 34902A,
and 34908A low-frequency multiplexers.
On-module screw terminals accept wire sizes from 16 gage to
22 gage. Twenty-gage wire is recommended for high channel
count applications. The 34905A and 34906A RF Multiplexers use
SMB connectors. A standard set of (10) BNC-to-SMB adapter
cables is provided with each RF module for convenient BNC
connections.
Multiplexer Actuator Matrix RF multiplexer Multifunction
34901A 34902A
[1]
34908A 34903A 34904A 34905A 34906A 34907A
General
Number of channels 20 + 2 16 40 20 4 x 8 Dual 1 x 4 See page 25
for module
specifications
2/4 wire 2/4 wire 1 wire SPDT 2 wire 50 Ω 75 Ω
Connects to internal DMM
● ● ●
Scanning speed
60 ch/s 250 ch/s
[1]
60 ch/s
Open/close speed 120/s 120/s 70/s 120/s 120/s 60/s
Input
Voltage (dc , ac rms)
[2]
300 V 300 V 300 V 300 V 300 V 42 V
Current (dc , ac rms) 1 A 50 mA 1 A 1 A 1 A 0.7 A
Power (W , VA) 50 W 2 W 50 W 50 W 50 W 20 W
DC characteristics
Offset voltage
[3]
< 3 uV < 6 uV < 3 uV < 3 uV < 3 uV < 6 uV
Initial closed channel R
[3]
< 1 Ω < 1 Ω < 1 Ω < 0.2 Ω < 1 Ω < 0.5 Ω
Isolation ch-ch, ch-earth > 10 GΩ > 10 GΩ > 10 GΩ > 10 GΩ > 10 GΩ > 1 GΩ
AC characteristics
Bandwidth
[4]
10 MHz 10 MHz 10 MHz 10 MHz 10 MHz 2 GHz
[5]
2 GHz
[5]
Insertion loss (dB) 10 MHz — — — — — –0.1 –0.1
100 MHz — — — — — –0.4 –0.4
500 MHz — — — — — –0.6 –0.5
1 GHz — — — — — –1 –1
1.5 GHz — — — — — –1.2 –1.5
2 GHz — — — — — -3 -2
SWR 0-9.99 MHz — — — — — 1.02 1.02
10-99.99 MHz — — — — — 1.05 1.05
100-499.99 MHz — — — — — 1.20 1.25
500-999.99 MHz — — — — — 1.20 1.40
1-1.499 GHz — — — — — 1.30 1.40
1.5-2 GHz — — — — — 1.40 2.00
ch-ch cross talk (dB)
[4]
10 MHz –45 –45 –18
[6]
–45 –33 –100 –85
100 MHz — — — — — –85 –75
500 MHz — — — — — –65 –65
1 GHz — — — — — –55 –50
1.5 GHz — — — — — –45 –40
2 GHz — — — — — –35 –35
Risetime < 300 ps
Signal delay < 3 ns
Capacitance HI - LO < 50 pF < 50 pF < 50 pF < 10 pF < 50 pF < 20 pF
LO - Earth < 80 pF < 80 pF < 80 pF < 80 pF < 80 pF —
Volt-Hertz limit 10
8
10
8
10
8
10
8
10
8
10
10
Other
T/C cold junction accuracy
[3]
(typical) 0.8°C 0.8°C 0.8°C
[8]
Switch life No load (typical) 100 M 100 M 100 M 100 M 100 M 5 M 5 M
Rated load (typical)
[7]
100 k 100 k 100 k 100 k 100 k 100 k 100 k
Temperature Operating all cards: 0 to 55°C
Storage all cards: –20 to 70°C
Humidity (non-condensing) all cards: 40°C to 80% RH
[1] Not recommended for connection to ac line without external
transient suppression. Up to 250 ch/s to internal memory.
See scanning rates for measurement condition and rate on each
instrument.
[2] Channel-to-channel or channel-to-earth
[3] Errors included in DMM measurement accuracy specifications
[4] 50 Ω source, 50 Ω load
[5] Bandwidth direct to card SMB connectors
[6] Isolation within channel 1 to 20 or 21 to 40 banks is –40 dB
[7] Applies to resistive loads only
[8] Thermocouple measurements not recommended with 34908A
module due to common lo configuration