# Agilent 81134A 3.35 GHz 2-Channel Pulse Pattern Generator (Pre-Owned) # Agilent 81134A 3.35 GHz 2-Channel Pulse Pattern Generator (Pre-Owned) ## Key Features At A Glance - Pulse, data, pattern and PRBS generation from 15 MHz to 3.35 GHz on all channels - Fast transition times: <60 ps (20%–80%) and <90 ps (10%–90%) per datasheet - Low jitter: <4 ps RMS clock-mode random jitter (1.5 ps typical); <5 ps RMS total jitter in data mode (2 ps typical) - 12 Mbit pattern memory per channel with 8 kbit accessible from the front panel - Selectable data formats: NRZ, RZ, and R1 with adjustable pulse width or duty cycle - PRBS generation from 2^5−1 to 2^31−1 with standards-compliant polynomials (ITU-T V.29, V.52, O.151, O.152, O.153) - Delay Control Input for pre-defined jitter injection up to ±250 ps for stress and signal-integrity testing - Available as 1-channel (81133A) or 2-channel (81134A) configuration with differential outputs and SCPI control over GPIB, LAN, and USB 2.0 The Agilent 81134A is a 2-channel 3.35 GHz pulse pattern generator designed for digital device characterization tasks where leading-edge signal integrity and timing performance are required. It provides programmable pulse periods from 15 MHz (66.6 ns) down to 3.35 GHz (298.5 ps) on all channels, with differential outputs and full control over signal parameters to enable typical and worst-case device tests. A companion 1-channel model, the 81133A, shares the same core architecture. The instrument is used for simulating the pulse and pattern conditions that a digital device will encounter in its final application. Datasheet-listed use cases include signal integrity measurements, generation of real-world-like signals by adding jitter to clock or data signals, distorting signals for eye diagram measurements, PLL frequency sweep, and microprocessor clock sweep applications where dropouts would otherwise prevent reliable measurement. ## Brand Heritage Agilent Technologies was spun out of Hewlett-Packard's test and measurement business in 1999. In 2014, Agilent's electronic measurement business became Keysight Technologies, which carries the direct product lineage and continued support for Agilent-era pulse and pattern generators including the 81133A and 81134A. ## Compare Other Models in This Series The 81133A and 81134A share a common 3.35 GHz pulse/pattern generation architecture, the same timing and jitter performance, the same 12 Mbit per-channel pattern memory, and the same Delay Control Input for jitter injection. The two models differ only in channel count and the corresponding front-panel I/O configuration. Both instruments support NRZ, RZ, and R1 data formats, PRBS sequences from 2^5−1 to 2^31−1, programmable amplitude from 50 mV to 2.00 V, and SCPI control over GPIB, LAN, and USB 2.0. The same store/recall behavior, the same direct-mode dropout-free frequency change capability, and the same Variable Crossover and jitter emulation features apply across the family. Each pre-owned model below is listed on its own dedicated product page with condition-matched pricing and availability. The two models are not interchangeable on the bench: choose the 81133A when a single differential channel meets the application requirement, and choose the 81134A when two independent differential channels with separate Delay Control Inputs are required. The 81134A is the 2-channel configuration. Its front panel provides four output connectors for the two differential channels, a trigger output, a clock input, a start input, and two Delay Control Inputs—one for each output channel. This allows independent jitter injection per channel and is the configuration shown in the datasheet's Jitter Emulation Test Setup. The 81133A provides one differential channel with two output connectors and one Delay Control Input. The 81134A provides two differential channels with four output connectors and two Delay Control Inputs, one per channel. Trigger output, clock input, and start input are present on both models. Pulse, data, and PRBS modes are independently configurable per channel on the 81134A, which makes it the appropriate choice for differential receiver test setups requiring two phase-correlated or independently-jittered stimulus signals. The comparison table that follows lists channel count and the resulting front-panel I/O differences side by side. Model Channels Frequency Range Pattern Memory **81134A** 2 15 MHz to 3.35 GHz 12 MBit per channel 81133A 1 15 MHz to 3.35 GHz 12 MBit per channel Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below. ## Product Core & Specifications Internal Clock Generation Period Range 298.5 ps - 66.6 ns Period Resolution 6 digits, 0.001 ps best case Frequency Range 15 MHz - 3.35 GHz Frequency Resolution 1 Hz Accuracy 50 ppm Jitter Random Jitter (Clock Mode) <4 ps RMS (1.5 ps typical) Total Jitter (Data Mode) <5 ps RMS (2 ps typical) (<30 ps pp (12 ps typical)) Channel Output Timing Number of Channels 1 (81133A), 2 (81134A) Transition Times (10% to 90%) < 90 ps Transition Times (20% to 80%) < 60 ps Delay Variation \-5 ns to 230 ns Delay Resolution 1 ps Delay Accuracy ± 20 ps Phase \-6000° to +279000° Phase Resolution 0.01°, or 1 ps Skew Between Differential Outputs < 20 ps nominal Maximum Skew Range ± 10 ns Width Range 100 ps to (period - 100 ps) Width Resolution 1 ps Width Accuracy ± 40 ps Duty Cycle Range 0.15% - 99.85% Duty Cycle Resolution 0.002%, or 1 ps Divide By 1, 2, 4, 8, 16, 32, 64, 128 Transition Times (Pulse Performance) Fast 60 ps to 70 ps Normal 70 ps to 80 ps Smooth 80 ps to 120 ps Channel Output Levels Amplitude 50 mV to 2.00 V Level Window \-2.00 V to +3.00 V Level Resolution 10 mV Level Accuracy 2% of setting ± 20 mV Amplitude Accuracy 2% ± 20 mV Settling Time 1 ns Overshoot, Ringing <10% ± 10 mV differential outputs Variable Crossover 30% to 70% typical Maximum External Termination Voltage \-2.00 V to +3.00 V Short Circuit Current 80 mA <= Isc <= 120 mA nominal Limit High and low levels into 50 Ohm can be limited Normal/Complement Selectable Disable Yes (relay) Trigger Output Amplitude 50 mV to 2.00 V Level Window \-2.00 V to +3.00 V Resolution 10 mV Format Fixed Duty Cycle, 50% nominal Maximum External Voltage \-2.00 V to +3.00 V Transition Times (20% to 80% of amplitude) < 100 ps (< 60 ps typical) Minimum Output Frequency 15 MHz / Divider Factor Mode Clock divided by 1, 2, 3, ... 2^31-1 or trigger on bit 0 of data Disable Yes (relay) Clock Input Interface ac-coupled with optional dc termination Impedance 50 Ohm Termination Voltage \-2.0 V to +3.0 V Minimum Swing 300 mV, tr < 3 ns, 50% duty cycle, sine: 0 dBm Maximum Amplitude 3 Vpp, ± 5 Vdc Frequency Measurement Yes Period Range 299 ps to 66.6 ns Period Resolution 6 digits, 0.001 ps best case Frequency Range 15 MHz to 3.35 GHz Measurement Resolution 100 kHz Measurement Accuracy 50 ppm Start Input Modes Start Impedance 50 Ohm nominal Termination Voltage 2.0 V to 3.0 V Transitions < 1 ns Threshold \-1.8 V to +4 V Max. Level Window \-2 V to +5 V Propagation Delay Clock Input to Trigger Output 8.4 ns nominal, fixed Trigger Output to Channel Output 32 ns nominal variable Data Generation Memory Depth 12 MBit per channel, 8 kBit accessible from front panel Data Format RZ / NRZ / R1 Granularity of Data Pattern Length 32 Bit up to 8 kBit; 128 Bit from 8 kBit to 12 MBit Interface dc-coupled Impedance 50 Ohm nominal **Important:** Maximum input levels on the Delay Control Input: ±2.5 V. Full delay modulation range is reached at input levels of ±500 mV with a modulation frequency range of 0 Hz to 200 MHz.**Important:** Specifications describe the instrument's warranted performance. Non-warranted values are described as typical. All specifications apply after a 30 min warm-up with 50 Ohm source/load resistance. All specifications are valid from 0 °C to 55 °C ambient temperature if not stated otherwise.**Important:** Timing specifications are valid after auto calibration with a maximum temperature variation of ±10 °C.**Important:** Width adjustment is not available if data mode is set to NRZ. Pulse format selection is only available when operating the instrument in the data/pattern modes.**Important:** Variable Crossover feature is available in NRZ mode only.**Important:** In Direct Mode, deskew adjustment is not available; all channels are factory deskewed at the front panel connectors.**Important:** Manufacturer-recommended recalibration period is 3 years.**Important:** For data patterns longer than 8 kBit, the PC-based Pattern Management Tool is required; the front panel only provides access to patterns up to 8 kBit, and instrument Store/Recall only retains patterns up to 8 kBit in length.Recommended pairing: the datasheet's Jitter Emulation Test Setup pairs the 81133A or 81134A with the Agilent 33250A as the external modulation source driving the Delay Control Input, and either the 54855A 6 GHz Infiniium oscilloscope or the 86100C DCA-J sampling oscilloscope for jitter measurement and analysis. ## 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 - 980.0 USD - **Vendor:** Agilent - **Type:** Pulse Generator - **Tags:** Agilent, Agilent Keysight, Manufacturers, Pattern, product_manual_group_1, Product_used, Signal Generators ## Variants | Variant | Price | Available | |---------|-------|-----------| | None | 0.00 USD | In stock | | NIST Traceable | 490.00 USD | In stock | | NIST Traceable with Full Data | 700.00 USD | In stock | | ISO IEC 17025 Accredited | 980.00 USD | In stock | ## Images - Agilent 81134A 3.35 GHz 2-Channel Pulse Pattern Generator (Pre-Owned) --- > Source: [ValueTronics](https://valuetronics.com/products/81134a-agilent-pattern-generator-used) > Updated: 2026-05-30