# Agilent 81101A 50 MHz Pulse Generator (Pre-Owned)

# Agilent 81101A 50 MHz Pulse Generator (Pre-Owned)

## Key Features At A Glance

-   Frequency range from 1 mHz to 330 MHz with the 81112A output module, or to 165 MHz with the 81111A module
-   Available as one or two channel configurations with user-retrofittable output modules
-   Pattern mode with 16 kbit per channel memory, including pseudo-random binary sequences (PRBS 2^n-1, n=7 to 14)
-   Self-calibration capability for improved timing and level accuracy
-   Selectable transition times of 800 ps or 1.6 ns on the 81112A module; variable 2 ns to 200 ms on the 81111A module
-   Channel addition feature allows internal combination of dual-channel outputs for multi-level and multi-timing signals
-   GPIB remote control per IEEE 488.2 with SCPI 1992.0 command set for ATE integration
-   Multiple trigger modes: continuous, external triggered, external gated, external width, manual, and internal triggered

The Agilent 81110A is a pulse pattern generator from the 81100 family, designed to generate the standard pulses and digital patterns needed for testing digital designs and components across current logic technologies including CMOS, TTL, LVDS, and ECL. As a mainframe instrument, the 81110A accepts one or two output modules — the 81111A (165 MHz, 10 V) or the 81112A (330 MHz, 3.8 V differential) — allowing the configuration to match the specific frequency, voltage, and connector requirements of the test application.

The 81110A is used for testing digital designs and components, generating stimuli for current logic technologies (CMOS, TTL, LVDS, ECL), simulation of reflections and distortions, and generation of three-level and four-level codes. Pattern mode supports user-defined data sequences up to 16 kbit per channel as well as pseudo-random binary sequences, making the instrument suitable for both deterministic stimulus generation and statistical bit-pattern testing. With dual output modules, multi-level and multi-timing signals can be created using the internal channel addition feature.

ValueTronics International has supported the test and measurement community since 1992 from our 20,000 sq ft secure warehouse at 1675 Cambridge Drive, Elgin, Illinois. Unlike drop-shippers and pass-through brokers, we physically stock, inspect, and test instruments in-house before they ship. The 81110A and other 81100-family mainframes and output modules are evaluated by our technicians, and condition reports document what we found against the manufacturer's published specifications. Calibration upgrade paths are available with each unit for customers whose quality systems require NIST-traceable or accredited calibration documentation.

## Brand Heritage

Hewlett-Packard's test and measurement business was spun off as Agilent Technologies in 1999, then transferred to Keysight Technologies in 2014. Instruments such as the 81110A bearing the Agilent brand are part of this continuous lineage. The 81100 family pulse pattern generators continue to be supported through the Keysight service organization for calibration and repair where applicable.

## Compare Other Models in This Series

The Agilent 81100 family of pulse pattern generators spans six mainframe-and-module configurations covering frequency ranges from 1 mHz to 660 MHz. The family is organized around four mainframes — the 81101A (single channel, 50 MHz), the 81104A (one or two channels, 80 MHz), the 81110A (one or two channels, 165 or 330 MHz depending on output module), and the 81130A (one or two channels, 400 or 660 MHz depending on output module).

All members of the 81100 family share form/fit compatibility and offer pattern mode operation from 80 MHz upward, including pseudo-random binary sequence generation. The output modules within each mainframe are user-retrofittable, which allows configuration changes without returning the mainframe to the factory. Dual-channel instruments can be configured with channel addition — analog summing on the 81101A/81104A/81110A modules, and EXOR digital combination on the 81130A modules — to create multi-level signals or higher effective data rates from a single instrument.

Each pre-owned 81100-family model below links to its own product page with condition-matched pricing and configuration. Mainframes and output modules are listed separately where applicable, and the compatibility constraint of matching module types within a dual-channel mainframe applies to all configurations.

The 81110A specifically occupies the 165–330 MHz tier in the 81100 family. It is the configuration of choice when the application requires pattern mode operation above 80 MHz with sub-nanosecond timing resolution, but where the 400/660 MHz data-generator architecture of the 81130A is not required. The 81110A retains variable pulse parameters in both pulse and pattern mode, which the 81130A does not.

The primary differences across the 81100 family are frequency range, channel count, timing resolution, and output module voltage. The 81101A is the entry tier at 50 MHz with a single fixed channel and 10 V amplitude. The 81104A extends to 80 MHz with one or two channels at 10 V. The 81110A reaches 165 MHz with the 81111A module (10 V, variable transitions) or 330 MHz with the 81112A module (3.8 V differential, selectable 800 ps or 1.6 ns transitions).

The 81101A, 81104A, and 81110A all support dropout-free and glitch-free timing changes; the 81130A does not. The 81130A trades this for higher-frequency operation, deeper pattern memory with sequencing and looping, and four selectable output formats (RZ, NRZ, DNRZ, R1). For applications requiring smooth parameter sweeps during measurement, the 81101A/81104A/81110A are the appropriate choice. For applications requiring the highest data rates and most complex pattern structures, the 81130A is appropriate.

Model

Frequency Range

Channels

Amplitude Range

**81101A**

1 mHz to 50 MHz

1

100 mV to 20.0 V

81104A

1 mHz to 80 MHz

1 or 2

100 mV to 20.0 V

81110A

1 mHz to 165/330 MHz

1 or 2

100 mV to 20.0 V (81111A) / 100 mV to 3.8 V (81112A)

81130A

1 kHz to 400/660 MHz

1 or 2

100 mV to 3.8 V (81131A) / 100 mV to 2.5 V (81132A)

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

## Accessories Supplied

-   Reference Guide (811xx-91021)

## Product Core & Specifications

Specification

Agilent 81101A

Frequency range

1 mHz to 50 MHz

Timing resolution

3.5 digits, 5 ps best case

Period RMS jitter (With PLL)

0.001% + 15 ps

Period RMS jitter (With VCO)

0.01% + 15 ps

Period range

20 ns to 999.5 s

Period accuracy (PLL/VCO)

± 0.01% (±5%)

Width range

10.0 ns to (period - 10.0 ns)

Width accuracy

±5% ±250 ps

Variable delay range

0 ns to (period -20 ns)

Delay accuracy

±5% ±1 ns

Double pulse delay range

(width + 10.0 ns) to (period - width - 10.0 ns)

Double pulse delay accuracy

±5% ± 500 ps

Transition time range (10/90)

5 ns to 200 ms variable

Transition accuracy

±10% ±200 ps

Linearity

3% typ. for transitions > 100 ns

Amplitude (50 Ω into 50 Ω)

100 mVpp to 10.0 Vpp

Amplitude (1 kΩ into 50 Ω)

200 mVpp to 20.0 Vpp

Level window (50 Ω into 50 Ω)

\-10.0 V to +10.0 V

Level window (1 kΩ into 50 Ω)

\-20.0 V to +20.0 V

Level accuracy (50 Ω)

± (3% + 75 mV)

Level accuracy (1 kΩ)

± (3% + 150 mV)

Level resolution (50 Ω / 1 kΩ)

10 mV / 20 mV

Output connectors

BNC single-ended

Source impedance

Selectable 50 Ω or 1 kΩ

Source impedance accuracy

Typ. ± 1%

Max. external voltage

± 24 V

Short circuit current

± 400 mA max.

Base line noise

10 mV RMS typ.

Overshoot/preshoot/ringing

± 5% of amplitude ± 20 mV

Burst count

2 to 65536

Duty cycle

0.1% to 95% (99.9% with overprogramming)

**Important:** The 81110A mainframe accepts the 81111A (165 MHz, 10 V) or the 81112A (330 MHz, 3.8 V) output modules. A combination of the 81111A and 81112A in one 81110A is not possible — both output modules in a dual-channel configuration must be the same module type.**Important:** A memory card is not included with the mainframe; order Opt UFJ 1 MB SRAM memory card separately if required.**Important:** The minimum configuration for a working instrument consists of a mainframe and one output module. The output module must be ordered separately for the 81104A, 81110A, and 81130A (the 81101A includes its output channel).**Important:** For the 81110A: Only use output modules of the same module number. A combination of the 81111A and 81112A in one 81110A is not possible.**Important:** For the 81130A: Only use output modules of the same module number. A combination of the 81131A and 81132A in one 81130A is not possible.**Important:** The Agilent 81130A is designed and recommended for operation in the frequency range of 170 kHz to 400/660 MHz. It can be operated in the extended range down to 1 kHz, but specifications change below 170 kHz.Recommended pairing: when characterizing the response of digital devices to the patterns generated by the 81110A, the datasheet lists complementary Agilent oscilloscopes including the DSO 80804B/80604B, DSO 80404B, DSO 80304B, and the D/MSO 6100/8104A series as suitable response instruments.

## 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 - 700.0 USD
- **Vendor:** Agilent
- **Type:** Pulse Generator
- **Tags:** 81101, 81101A, Agilent, Agilent Keysight, Agilent Technologies, consignment-active, Manufacturers, Model 81101, Pre-Owned, product_manual_group_1, Product_used, Pulse, Signal Generators

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| None | 0.00 USD | In stock |
| NIST Traceable | 280.00 USD | In stock |
| NIST Traceable with Full Data | 490.00 USD | In stock |
| ISO IEC 17025 Accredited | 700.00 USD | In stock |

## Images

- Agilent 81101A 50 MHz Pulse Generator (Pre-Owned)

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> Source: [ValueTronics](https://valuetronics.com/products/81101a-agilent-pulse-generator-used)
> Updated: 2026-05-30