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54120B

Keysight Technologies (Agilent HP)Mainframe

The Keysight (formerly Agilent / HP) 54120B is a high-performance digitizing oscilloscope mainframe designed for high-speed digital, telecommunications, microwave, and time-domain reflectometry (TDR) measurements. Used in conjunction with HP 54120-series sampling test sets, it offers exceptional stability, precise 12-bit vertical resolution, and fully programmable control via HP-IB.

RF and MicrowaveSignal IntegrityTime Domain Reflectometry

Specifications

General

ParameterValue
InterfacesHP-IB (IEEE-488)
Display9-inch color CRT

Physical

ParameterValue
Power Supply115 / 230 V AC (-25% to +15%), 48 to 66 Hz, 200 VA max
Operating Temperature15°C to 35°C (for full accuracy); 0°C to 55°C (operating limit)
Dimensions (W×H×D)425.4 mm × 194.3 mm × 563.9 mm

System Performance & Architecture

ParameterValue
Compatible Test SetsHP 54121A (20 GHz), HP 54122A (12.4 GHz), HP 54123A (34 GHz), HP 54124A (50 GHz)
Vertical Resolution12 bits (up to 14 bits with averaging)
Maximum Number of Channels4 channels (test-set dependent)
Waveform Record Length501 points or 1024 points (user selectable)

Horizontal System & Timebase

ParameterValue
Mainframe Time Base Range10 ps/div to 1 s/div
Time Base Resolution10 fs (via averaging/interpolation)
System Jitter (RMS)< 2.5 ps RMS + 5 ppm of delay

Acquisition Modes & Processing

ParameterValue
Acquisition ModesEquivalent time sampling, averaging, persistence
Number of Averages1 to 2048 (selectable in binary steps)
Waveform Math FunctionsAddition, subtraction, multiplication, division, integration, differentiation

Measurement & Display Capabilities

ParameterValue
Automatic Parametric MeasurementsRise time, fall time, frequency, period, positive width, negative width, duty cycle, preshoot, overshoot, Vp-p, Vmax, Vmin, Vtop, Vbase, Vrms, Vmean
Cursor TypesDual voltage and time cursors with continuous delta readouts

Environmental & Safety

ParameterValue
Storage Temperature Range-40°C to +75°C
Operating HumidityUp to 95% relative humidity at 40°C
Operating AltitudeUp to 4,600 m (15,000 ft)
Calibration Interval1 year

System Architecture

ParameterValue
CPUMotorola 68000
Floating Point CoprocessorMotorola 68881

Storage

ParameterValue
Non-Volatile Waveform Memories4

Triggering

ParameterValue
Direct Trigger Frequency RangeDC to 2.5 GHz
Direct Trigger Input Impedance50 Ω (nominal)
Direct Trigger Maximum Input Voltage±5 V (DC + peak AC)
Direct Trigger Sensitivity (DC to 100 MHz)40 mV p-p
Direct Trigger Sensitivity (100 MHz to 2.0 GHz)100 mV p-p
Direct Trigger Sensitivity (2.0 GHz to 2.5 GHz)200 mV p-p

Timebase

ParameterValue
Option 001 External Reference Input Frequency1, 2, 5, or 10 MHz
Option 001 External Reference Input Impedance50 Ω
Internal Timebase Reference Output Frequency10 MHz

Connectivity & Output

ParameterValue
Hardcopy Print SupportHP-GL plotters, HP ThinkJet, QuietJet, and LaserJet printers

General & Environmental

ParameterValue
CoolingForced air by rear-panel fan
Electromagnetic Interference ComplianceFTZ 526/1969, VDE 0871 Level B

Connectivity

ParameterValue
External Monitor Outputs4 BNC female connectors (Red, Green, Blue, Sync)
IEEE-488 (HP-IB) Interface CodesSH1, AH1, T5, TE0, L3, LE0, SR1, RL1, PP1, DC1, DT1, C0, E2

Acquisition

ParameterValue
Maximum Sampling Rate100 kHz
A/D Converter Resolution12 bits

Power

ParameterValue
Line Voltage Range90 to 132 V AC / 198 to 264 V AC
Line Frequency Range48 to 66 Hz
Maximum Power Consumption200 VA

Technology

Sampling Oscilloscope

Applications

High-speed digital design, time-domain reflectometry (TDR), microwave circuit characterization, and high-speed telecom analysis