# Keysight 33502A 2-Channel 50 Vpp Isolated Amplifier (Pre-Owned)

# Keysight 33502A 2-Channel 50 Vpp Isolated Amplifier (Pre-Owned)

## Key Features At A Glance

-   Maximum output level ±25 Vpk (50 Vpp) per channel — two independent channels
-   Isolated analog front end floats ±42 Vpk to earth for ground-referenced or floating measurements
-   THD+N < 0.01% at 10 kHz, 40 Vpp output (for loads >250 Ω and <400 pF capacitance per datasheet)
-   Full-power bandwidth 100 kHz at 50 Vpp; small-signal bandwidth >300 kHz (-3 dB)
-   Slew rate >20 V/µs minimum; output drive 200 mA maximum
-   Programmable input path: gain of 5x, bypass (1x), or off — switchable without recabling
-   Independently configurable input coupling (AC/DC) and input impedance (50 Ω / 1 MΩ)
-   LAN (LXI Class-C) and USB 2.0 interfaces standard; SCPI-1994.0 and IEEE-488.2 command compatibility

The Keysight 33502A is a dual-channel isolated amplifier designed to extend the output capability of function and arbitrary waveform generators. It provides a fixed non-inverting gain of 5x with up to ±25 Vpk (50 Vpp) output per channel, paired with a fully isolated analog front end that floats ±42 Vpk relative to earth ground. The 33502A is positioned as a companion instrument for function generators where higher voltage output and low distortion are both required from the same signal path.

Per the datasheet, the 33502A is compatible with existing Keysight function/arbitrary waveform generators including the 33120A, 33210A, 33220A, and 33250A, and can also amplify signals from non-Keysight function and arbitrary waveform generators. The instrument is intended for applications where a generator's native output range is insufficient for the device under test, and where signal fidelity through the amplification stage matters — for example, when driving loads that require higher voltage swing while preserving the waveform integrity of the source generator.

## Brand Heritage

Keysight Technologies was formed in 2014 as a spin-off from Agilent Technologies, which itself was spun off from Hewlett-Packard's test and measurement business in 1999. Instruments in the Keysight 335xx function generator and amplifier product family — including the 33502A — carry the engineering lineage of the HP and Agilent function/arbitrary waveform generator product lines that preceded them.

## Product Core & Specifications

Feature

Characteristics

General

Number of channels

2

Channel to channel ground connection

Not connected in BYPASS ON. Connected with both channels OFF or in Gain of 5x

Floating Voltage

± 42 Vpk to earth

Input Coupling

AC coupling

Programmable

DC coupling

Default, programmable

Input Impedance

1 MΩ

Default, programmable

50 Ω

Programmable

Input voltage range

Maximum voltage range

± 5 Vpk for gain of 5x, ± 30 Vpk for bypass

Damage level

± 10 Vpk for 50 Ω input; ± 35 Vpk for 1 MΩ input

Input path

Programmable gain of 5x, bypass (1x), or off state

Input gain 5x

5x, Fixed, Non-inverting

Gain accuracy

± 0.1% @ 1 kHz

Flatness DC coupling

0.1%: dc - 10 kHz; 1%: dc - 40 kHz; 5%: dc - 100 kHz

Flatness AC coupling

0.1%: 30 Hz - 10 kHz; 1%: 10 Hz - 40 kHz; 5%: 3 Hz - 100 kHz

Small signal bandwidth

\> 300 kHz (–3 dB)

Full power bandwidth

100 kHz @ 50 Vpp output

Input bypass

Bandwidth for 50 Ω system

\> 300 MHz (–3 dB)

Maximum current

0.2 Apk

Noise

Input referred noise

< 40 nV/rt-Hz @ 1 kHz

Output configuration and specification

Output current

200 mA (150 mA for continuous output from -8 V to +8 V)

DC output resistance

< 2 Ω

Max output level

± 25 Vpk

Output DC offset

< 10 mV

Output slew rate

\> 20 V/µs

THD + N

< 0.01% @ 10 kHz, 40 Vpp

Aberrations

< 5% for waveforms with < 3 V input step or non slewing output

Transition time (Final value ± 1% of step size)

2.5 µSec + 50 nSec/volt of output step

Channel to channel isolation for gains of 5x

\> 75 dB

Capacitive Load for no oscillation

< 1 nF

Output protection

Continuous short circuit protection. Thermal overload shutdown. Over temperature status flag.

General characteristics

Power supply

100 V / 120 V / 220 V / 240 V ± 10%

Power line frequency

50–60 Hz ± 10%; 400 Hz ± 10%

Power consumption

100 VA peak (typical value depends on configuration and load)

Operating environment

Full accuracy for 0 to 55 °C; Full accuracy to 80% R.H. at 40 °C Non-condensing

Storage temperature

–40 to 70 °C

Operating altitude

Up to 3000 m

Bench Dimensions (W x H x D)

261.2 mm x 103.8 mm x 303.2 mm

Weight

3.1 kg (6.8 lbs)

Acoustic noise

Normal operating mode: SPL 35 dB(A)

Display

4.3" Color TFT WQVGA (480 x 272), LED backlight

Remote interfaces

10/100 Mbit LAN, USB 2.0 Standard

Language

SCPI – 1994.0, IEEE–488.2

LXI compliance

LXI Class C, Version 1.0

**Important:** Input damage levels: ±10 Vpk for 50 Ω input selection; ±35 Vpk for 1 MΩ input selection. Maximum input voltage range for the gain-of-5x path is ±5 Vpk; for bypass path, ±30 Vpk. Bandwidth, slew rate, THD+N, aberration, and transition time specifications apply for loads greater than 250 Ω and less than 400 pF of capacitance.**Important:** Flatness, small-signal bandwidth, full-power bandwidth, max output level, output slew rate, THD+N, aberrations, and transition time specifications apply for all loads > 250 ohms and < 400 pF of capacitance.**Important:** Gain accuracy is measured with ≥ 1 MΩ load and 1 MΩ input selection.**Important:** Damage levels: do not exceed ± 10 Vpk on the 50 Ω input or ± 35 Vpk on the 1 MΩ input.**Important:** Output isolation floats ± 42 Vpk to earth — do not exceed this limit between the amplifier output and earth ground.Recommended pairing: the datasheet states compatibility with Keysight function/arbitrary waveform generators including the 33120A, 33210A, 33220A, and 33250A. The 33502A is designed to be driven by these generators (or by non-Keysight function/arbitrary generators) when the application requires higher output voltage swing or lower distortion than the source generator alone provides.

## About this used unit

-   Warranty included
-   Functional verification included
-   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:** 3895.0 USD - 4595.0 USD
- **Vendor:** Keysight
- **Type:** Accessory
- **Tags:** product_manual_group_3

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 3895.00 USD | In stock |
| NIST Traceable | 4245.00 USD | In stock |
| NIST Traceable with Full Data | 4420.00 USD | In stock |
| ISO IEC 17025 Accredited | 4595.00 USD | In stock |

## Images

- Keysight 33502A 2-Channel 50 Vpp Isolated Amplifier (Pre-Owned)

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> Source: [ValueTronics](https://valuetronics.com/products/33502a-keysight-amplifier-used)
> Updated: 2026-05-30