Datasheet

Page 18
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Ultra Low Noise Filter (N1294A-021)
Max output range 42 V / 105 mA (DC)
Output connector BNC
Output / residual resistance 50 Ω nominal (2-wire), 0.3 Ω nominal (4-wire. 4-wire connected inside of filter)
Small signal bandwidth 23 Hz nominal (2-wire), 8 Hz nominal (4-wire)
Noise
Voltage source 0.1 to 10 Hz Same as voltage specification
10 to 20 MHz 10 μVrms, 1 nVrms√Hz at 10 kHz (20 V / 100 mA range, 50 Ω load)
Current source
0.1 to 10 Hz Same as current specification
10 to 1 MHz 300 nArms (20 V / 100 mA range, 10 Ω load)
Settling time
Voltage source
1
80 ms (2-wire), 140 ms (4-wire)
Current source
2
11 ms (2-wire), 150 ms (4-wire)
1. Time required to reach within 0.1 % of final value at open load condition. Step is 10 % to 90 % range. At 20 V range, 100 mA limit/100 mA range
2. Time required to reach within 0.1 % of final value at short condition. Step is 10 % to 90 % range. At 100 mA range, 20 V limit / 20V range
Load transient recovery time: Time to recover to within the settling band following a load change.
50 mA current change
1
Settling band
± 20 mV
Time 50 ms (2-wire), 85 ms (4-wire)
1. At a load change to change the flowing current from +10 mA to +60 mA, 10 V voltage force, 20 V range, 100 mA limit
Supported
ranges
Voltage 200 mV to 200 V ranges (42 V max)
Current 10 μA to 100 mA ranges (105 mA max)
Maximum capacitive load 50 μF (for 4-wire)
Dimensions
41 mm H x 58.2 mm W x 141.5 mm D (When the filter is inserted to the output connector of B2961A/
B2962A, the depth is 126.5 mm.)
Weight 0.3 kg
Note:
– The 10 A pulse range and programmable output resistance capability are not supported by external filters.
– For the current output, only DC is supported when using with external filters.
– The current measurement data monitored by the built-in voltage/current monitor can be influenced by the charge and discharge current of the capacitance inside of the filters.
1.E-10
1.E-09
1.E-08
1.E-07
1.E-06
1.E-05
1.E-04
1.E+00 1.E+02 1.E+04 1.E+06 1.E+08
Noise Density [Vrms/√Hz]
Frequency [Hz]
20V range
2V range