Agilent Technologies B2902 Instrukcja Użytkownika Pobierz pdf (Strona 27)

Programmable Output Resistance

In its default state the Agilent B2961A/B2962A behaves like either an ideal volt-

age source with a negligibly small source resistance or an ideal current source

with a huge source resistance. The programmable output resistance feature

allows you to specify either a particular output resistance or a specific voltage

versus current source characteristic. This feature is ideal for emulating a wide

variety of devices (such as batteries, photovoltaic cells, sensors, transducers,

etc.) that are otherwise difficult to simulate.

Mode: Constant or V/I Emulation

Programmable resistance range:

Series resistance (Rs) at voltage source:

- (Load Resistance/2) ≤ Rs ≤ Load Resistance, for resistive load

Rs ≤ 25 Ω at 3 A range, ≤ 100 Ω at 1 A and 1.5 A ranges, ≤ 1 kΩ at 100 mA

range, or ≤ 10 kΩ at other ranges,

Rs can be limited by capacitive load.

Shunt resistance (Rsh) at current source:

Load Resistance ≤ Rsh ≤ 2 G Ω, for resistive load

Rsh ≥ 10 M Ω at 10 nA and 100 nA ranges, ≥ 1 M Ω at other ranges

Rsh can be limited by capacitive load.

Emulation mode:

Emulation mode allows you to program a non-linear resistance. You specify

the desired voltage/current characteristic using a tabular format.

Maximum number of points: 16 (piecewise linear interpolation between

points)

* Programmable Output Resistance is only available for DC output.

External Low Noise Filter Supplemental Characteristics

The Agilent B2961A/B2962A supports dedicated external low-noise filters; they

are available as an option or as an accessory. They connect to the banana jack

outputs of each Agilent B2961A/B2962A channel.

Ultra Low Noise Filter (N1294A-021)

Maximum 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, 1nVrms/

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)

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 33 34 35

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