Specifications

5
Module Specifications
The Agilent 34970A accuracy specifi-
cations 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 combina-
tion, can be inserted into a single
mainframe. The 34970A'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. 20
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
GENERAL 34901A 34902A
[1]
34908A 34903A 34904A 34905A 34906A 34907A
Number of Channels 20 + 2 16 40 20 4 x 8 Dual 1 x 4 See
2/4 wire 2/4 wire 1 wire SPDT 2 wire 50 Ω 75 Ω Page 22
Connects to Internal DMM • • • for module
Scanning Speed 60 ch/s 250 ch/s 60 ch/s specifications
Open/Close Speed 120/s 120/s 70/s 120/s 120/s 60/s
INPUT
Voltage (dc, ac rms)
[2]
300V 300V 300V 300V 300V 42
Current (dc, ac rms) 1A 50mA 1A 1A 1A 0.7A
Power (W, VA) 50W 2W 50W 50W 50W 20W
DC Characteristics
Offset Voltage
[3]
< 3uV < 6uV < 3uV < 3uV < 3uV < 6uV
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 G Ω > 10 G Ω > 10 G Ω > 10 G Ω > 10 G Ω > 1 G Ω
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 10 MHz 1.02 1.02
100 MHz 1.05 1.05
500 MHz 1.20 1.25
1 GHz 1.20 1.40
1.5 GHz 1.30 1.40
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
Switch Life No Load (typical) 100M 100M 100M 100M 100M 5M 5M
Rated Load (typical)
[7]
100k 100k 100k 100k 100k 100k 100k
Temperature Operating all cards — 0°C to 55°C
Storage all cards — -20°C to 70°C
Humidity (non-condensing) all cards — 40°C / 80% RH
[1] Not recommended for connection to ac line without external transient suppression
[2] Channel-to-channel or channel-to-earth
[3] Errors included in DMM measurement accuracy specifications
[4] 50Ω source, 50Ω 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