# Keysight B2961A 6.5 Digit Low Noise Power Source, 1-Channel, 210 V / 3 A DC / 10.5 A Pulse, 31.8 W (Pre-Owned)

# Keysight B2961A 6.5 Digit Low Noise Power Source, 1-Channel, 210 V / 3 A DC / 10.5 A Pulse, 31.8 W (Pre-Owned)

## Key Features At A Glance

-   Maximum output of ±210 V and ±3.03 A DC (±10.5 A pulsed) with bipolar 4-quadrant operation across the full range
-   6.5 digit source resolution with 100 nV / 10 fA minimum step for precision sourcing of low-level signals
-   Ultra-low noise performance of 10 µVrms (10 Hz to 20 MHz) and 1 nVrms/√Hz at 10 kHz with optional external filters
-   Built-in 4.5 digit voltage and current monitor with 10 µV / 1 pA minimum measurement resolution
-   Arbitrary waveform generation from 1 mHz to 10 kHz with six built-in waveforms plus user-defined arbitrary waveforms
-   Programmable output resistance with Constant mode and V/I emulation mode (up to 16 user-defined points)
-   4.3-inch color LCD with single view, dual view, and time-domain graph view for waveform inspection
-   GPIB, USB 2.0, LAN (LXI Core Conformant), and Digital I/O interfaces standard for automated test integration

The Keysight B2961A/B2962A 6.5 Digit Low Noise Power Source is a bench-top precision power source available in 1-channel (B2961A) and 2-channel (B2962A) configurations. The instrument combines 6.5 digit source resolution with 100 nV and 10 fA minimum step sizes, ±210 V and ±3 A DC output (±10.5 A pulsed), and bipolar 4-quadrant operation in a single chassis. Built-in 4.5 digit voltage and current monitoring eliminates the need for a separate DMM during many bench measurements.

Application areas listed in the product literature include A/D and D/A converter evaluation, high-precision analog IC and circuitry characterization, RFIC testing, medical applications, cable and wire harness evaluation, voltage-controlled oscillators, sensor and transducer characterization, solar cell and interface circuitry testing, electrochemical applications, research and education, crystal oscillator measurement, current sourcing for small-voltage measurement, battery management, and advanced materials evaluation. The wide bipolar output range and high-resolution sourcing extend the instrument into measurement situations that conventional 4.5 digit bench supplies cannot address.

## Brand Heritage

Keysight Technologies is the direct successor to Hewlett-Packard's test and measurement business. HP spun off its T&M and life-sciences operations as Agilent Technologies in 1999, and in 2014 Agilent further separated its electronic measurement business as Keysight Technologies. Instruments carrying the HP, Agilent, and Keysight names share a continuous engineering lineage in precision sourcing and measurement.

## Compare Other Models in This Series

The B2961A and B2962A share the same precision sourcing architecture — 6.5 digit resolution, ±210 V / ±3 A DC output, ±10.5 A pulsed capability, 31.8 W maximum power, bipolar 4-quadrant operation, and the same arbitrary-waveform and programmable-output-resistance feature sets. They differ only in channel count: the B2961A is a 1-channel instrument, and the B2962A is a 2-channel instrument with the second channel accessible on the rear panel.

Both models accept the same three optional external low-noise filters (High Current Ultra Low Noise, Ultra Low Noise, and Low Noise) and share identical connectivity (GPIB, USB 2.0, LAN with LXI Core Conformance, and 25-pin Digital I/O). The decision between the two models is driven entirely by whether a given bench requires one or two independent precision channels.

Each pre-owned B2961A and B2962A linked below is its own product page with condition-matched pricing, availability, and accessory inventory. Selecting the right channel count for the application is the first decision; the listed product pages then provide the specific unit information for that model.

The B2962A's second channel is exposed on the rear panel and shares the chassis, display, and interface infrastructure with channel 1. Both channels are independently programmable and operate within the same 31.8 W envelope, subject to the combined-current limitation table for output regions involving the 6 V and 21 V ranges.

Channel count is the only functional difference between the B2961A and B2962A. Both instruments deliver identical per-channel specifications: 6.5 digit resolution, ±210 V / ±3 A DC, ±10.5 A pulsed, the same noise performance with optional filters, the same 4.3-inch color LCD, and the same arbitrary-waveform and programmable-output-resistance capabilities. Net weight is 5.1 kg for the B2961A and 6.5 kg for the B2962A; shipping weights are 7.6 kg and 9.0 kg respectively.

The comparison table that follows summarizes channel count and the resulting weight difference. For applications that require two independent precision sources on a single bench — for example, biasing two terminals of a device under test, or simultaneously stimulating an input and monitoring an auxiliary supply rail — the B2962A consolidates that capability into one chassis. For single-source applications, the B2961A delivers identical per-channel performance at a lower price and footprint.

Model

Channels

Max Voltage

Max Current (DC / Pulse)

**B2961A**

1

210 V

3 A DC / 10.5 A Pulse

B2962A

2

210 V

3 A DC / 10.5 A Pulse

Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below.

## Accessories Supplied

-   Power cable
-   USB cable
-   Quick Reference (English)
-   CD-ROMs (including PDF manuals, Quick I/V Measurement Software and drivers)
-   Keysight I/O Library suite

## Product Core & Specifications

Specification

B2961A / B2962A (No External Filter)

With High Current Ultra Low Noise Filter (N1294A-020)

With Ultra Low Noise Filter (N1294A-021)

With Low Noise Filter (N1294A-022)

Number of channels

1 or 2

1 or 2

1 or 2

1 or 2

Maximum voltage (DC or arbitrary waveform output)

±210 V

±21 V

±42 V

±210 V

Maximum current (DC or arbitrary waveform output)

±3.03 A

±500 mA

±105 mA

±3.03 A

Maximum voltage (Pulsed)

±200 V

±21 V

±42 V

±200 V

Maximum current (Pulsed)

±10.5 A

±500 mA

±105 mA

±3.03 A (10 A pulse range not supported)

Maximum power

31.8 W

10.5 W

4.4 W

31.8 W

Output polarity

Bipolar (4-quadrant operation)

Bipolar (4-quadrant operation)

Bipolar (4-quadrant operation)

Bipolar (4-quadrant operation)

Source resolution (digits)

6.5 digit

6.5 digit

6.5 digit

6.5 digit

Minimum resolution

100 nV / 10 fA

100 nV / 10 pA

100 nV / 10 pA

100 nV / 10 pA

DC output capability

Yes

Yes

Yes

Yes

Pulsed output capability

Yes

Voltage output only

Voltage output only

Voltage output only

Sweep (DC/Pulse/List) capability

Yes

Voltage output only

Voltage output only

Voltage output only

Arbitrary waveform capability

Yes

Voltage output only

Voltage output only

Voltage output only

Noise, 0.1 to 10 Hz

≤ 5 µVpp

≤ 5 µVpp

≤ 5 µVpp

≤ 5 µVpp

Noise, 10 Hz to 20 MHz

3 mVrms

10 µVrms (1 nVrms/√Hz @ 10 kHz)

10 µVrms (1 nVrms/√Hz @ 10 kHz)

350 µVrms

Measurement capability

4.5 digit built-in voltage/current monitor

4.5 digit built-in voltage/current monitor

4.5 digit built-in voltage/current monitor

4.5 digit built-in voltage/current monitor

Voltage source/monitor ranges

200 mV to 200 V

200 mV to 20 V (max 21 V)

200 mV to 200 V (max 42 V)

200 mV to 200 V

Current source/monitor ranges

10 nA to 10 A

1 mA to 1 A

10 µA to 100 mA

10 µA to 3 A

Programmable output resistance (Constant R)

Yes

No

No

No

Programmable output resistance (V/I emulation)

Yes

No

No

No

Single view

Yes

Yes

Yes

Yes

Waveform preview

Yes

Yes

Yes

Yes

Dual view

Only 2-ch model (B2962A)

Only 2-ch model (B2962A)

Only 2-ch model (B2962A)

Only 2-ch model (B2962A)

Graph view (time-domain V/I waveform viewer)

Yes

Yes

Yes

Yes

Max capacitive load

0.01 µF (normal mode)

50 µF

50 µF

1 mF

Interface

GPIB, USB 2.0, LAN and Digital I/O (LXI Core Conformant)

Operating environment

0 °C to +55 °C, 30 % to 80 % non-condensing

Storage environment

\-30 °C to 70 °C, 10 % to 90 % non-condensing

Altitude

Operating: 0 m to 2000 m; Storage: 0 m to 4600 m

Power supply

90 V to 264 V, 47 Hz to 63 Hz, 250 VA max

Cooling

Forced air. Side intake and rear exhaust.

EMC

IEC61326-1/EN61326-1, AS/NZS CISPR 11, KC: RRA Notification amending Radio Waves Act Article 58-2

Safety

IEC61010-1/EN61010-1, CAN/CSA-C22.2 No. 61010-1-04, C/US

Certifications

CE, cCSAus, C-Tick, KC

Case dimensions

88 mm H x 213 mm W x 450 mm D

Working dimensions (with handle & feet)

180 mm H x 260 mm W x 480 mm D

Net weight

5.1 kg (B2961A); 6.5 kg (B2962A)

**Important:** Maximum total current with both channels active is limited per the Maximum Current Limitation table — at the 21 V and 6 V ranges, combined Ch1 + Ch2 current is constrained (for example, Ch1 + Ch2 ≤ 4 A when both channels operate in the 0 < V ≤ 6 V region). Single-channel operation is not subject to this limitation.**Important:** When using external low-noise filters (N1294A-020, N1294A-021, N1294A-022), the 10 A pulse range and programmable output resistance capability are not supported.**Important:** When using external low-noise filters, only DC is supported for current output.**Important:** 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.**Important:** For the 21 V/1.515 A and 6 V/3.03 A ranges on the B2962A, total max current is limited per the two-channel current-limitation table when both channels are in use; max current is not limited when only one channel is used.**Important:** Triaxial connections are recommended for sourcing currents less than 1 nA. A banana-jack-to-triaxial adapter (N1294A-001 or N1294A-002) is available for low-current sourcing and is ordered separately.Recommended pairing: when sourcing currents below 1 nA, use the N1294A-001 (2-wire) or N1294A-002 (4-wire) Banana-to-Triax adapter with low-leakage triax cables (16494A series) per the datasheet's low-current connection guidance.

## About this used unit

-   Warranty included
-   Functional verification included
-   Standard Calibration Upgrade Options: No Calibration Required, NIST Traceable, Z540.1 or ISO 17025 with Data, Z540.3 Guardbanding with Data.
-   Note that unnecessary accessories may not be included (contact Test Architect to confirm).

**Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.**

## Details

- **Price:** 0.0 USD - 910.0 USD
- **Vendor:** Keysight
- **Type:** Dc Supply
- **Tags:** Agilent, Agilent Keysight, Manufacturers, Meters & DAQ, product_manual_group_2, Product_used, Sourcemeter

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| None | 0.00 USD | In stock |
| NIST Traceable | 560.00 USD | In stock |
| NIST Traceable with Full Data | 735.00 USD | In stock |
| ISO IEC 17025 Accredited | 910.00 USD | In stock |

## Images

- B2961A Agilent Keysight HP BiPolar Power Supply

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> Source: [ValueTronics](https://valuetronics.com/products/b2961a-agilent-bipolar-power-supply-used)
> Updated: 2026-05-30