HP 34970A Module Specifications

Chapter 9 Specifications

Module Specifications

Module Specifications

HP 34901A, 34902A, 34908A, 34903A, 34904A

				Multiplexer		Actuator	Matrix
General			34901A	34902A	34908A	34903A	34904A
Number of Channels			20+2	16	40	20	4x8
			2/4 wire	2/4 wire	1 wire	SPDT	2 wire
Connects to Internal DMM			Yes	Yes	Yes	No	No
Scanning Speed			60 ch/s	250 ch/s	60 ch/s
Open/Close Speed			120/s	120/s	70/s	120/s	120/s
Maximum Input
Voltage (dc, ac rms)			300 V	300 V	300 V	300 V	300 V
Current (dc, ac rms)			1 A	50 mA	1 A	1 A	1 A
Power (W, VA)			50 W	2 W	50 W	50 W	50 W
Isolation (ch-ch, ch-earth)		dc, ac rms	300 V	300 V	300 V	300 V	300 V
DC Characteristics
Offset Voltage [1]			< 3 μV	< 6 μV	< 3 μV	< 3 μV	< 3 μV
Initial Closed Channel R [1]			< 1Ω	< 1Ω	< 1Ω	< 0.2Ω	< 1Ω
Isolation (ch-ch, ch-earth)			> 10 GΩ	> 10 GΩ	> 10 GΩ	> 10 GΩ	> 10 GΩ
AC Characteristics
Bandwidth			10 MHz	10 MHz	10 MHz	10 MHz	10 MHz
Ch-Ch Cross Talk (dB) [2]		10 MHz	-45	-45	-18 [3]	-45	-33
Capacitance		HI to LO	< 50 pF	< 50 pF	< 50 pF	< 10 pF	< 50 pF
Capacitance		LO to Earth	< 80 pF	< 80 pF	< 80 pF	< 80 pF	< 80 pF
Volt-Hertz Limit			108	108	108	108	108
Other
T/C Cold Junction Accuracy [1] (typical)			0.8 °C	0.8 °C	0.8 °C
Switch Life	No Load (typical)		100M	100M	100M	100M	100M
Switch Life	Rated Load (typical) [4]		100k	100k	100k	100k	100k
Temperature		Operating		All Modules – 0 °C to 55 °C
Temperature		Storage		All Modules – -20 °C to 70 °C
Humidity (non-condensing)				All Modules – 40 °C / 80% R.H.

[1]Errors included in the DMM measurement accuracy specifications

[2]50Ω source, 50Ω load

[3]Isolation within channel 1 to 20 or 21 to 40 banks is -40 dB

[4]Applies to resistive loads only

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