Keysight InfiniiVision HD3 Series Oscilloscopes – Certified Used with 14-Bit ADC Precision
Key Measurement Tasks the HD3 Is Built For
What matters
- High vertical resolution
- Low noise floor
- Clear signal visibility at low amplitudes
Where many oscilloscopes fall short
- Limited resolution (8-12 bit)
- Noise masks small signals
- Inaccurate low-level measurements
Why the HD3 is different
- 14-bit ADC for higher measurement accuracy
- Low-noise front-end for uV-level signals
- Integrated analysis tools for faster validation
What matters
- High waveform update rate
- Accurate real-time protocol decoding
- Ability to capture infrequent communication errors
Where many oscilloscopes fall short
- Software-based decoding slows analysis
- Low update rates miss intermittent errors
- Limited visibility into complex multi-bus systems
Why the HD3 is different
- Hardware-based serial decoding for real-time accuracy
- 1.3M waveforms/sec update rate to capture rare events
- Time-interleaved decoding for analyzing multiple buses simultaneously
- Pass/fail mask testing to flag protocol and timing violations
What matters
- Consistently high waveform update rate
- Efficient capture of infrequent events
- Automated detection of signal anomalies
Where many oscilloscopes fall short
- Update rate drops with measurements enabled
- Rare events are easily missed
- Manual search for anomalies is time-consuming
Why the HD3 is different
- Uncompromised waveform update rate even with analysis active, powered by the MegaZoom 5 ASIC
- Fault Hunter automatically detects glitches and anomalies
- Segmented memory captures relevant events without dead time
What matters
- Ability to analyze signals in time and frequency domains
- Sufficient bandwidth for modern communication signals
- Advanced modulation and signal analysis capabilities
Where many oscilloscopes fall short
- Limited frequency-domain analysis capabilities
- Require additional dedicated instruments
- Lack flexibility for complex signal environments
Why the HD3 is different
- Built-in FFT with up to 96 dB dynamic range and 79 dB SFDR, enabling detailed frequency-domain analysis without a separate spectrum analyzer
- Compatible with 89600 VSA software for broadband vector signal analysis using the oscilloscope as a front end
- Supports complex modulation and multi-channel analysis workflows
Why the HD3 Delivers Higher Measurement Accuracy Than Typical Mid-Range Oscilloscopes
The advantage of 14-bit architecture
Most oscilloscopes in this class use 8–12 bit ADCs. While sufficient for general-purpose measurements, they often lack the resolution needed to accurately capture small signal variations.
The number of bits in an ADC sets its vertical resolution: the HD3’s custom 14-bit ADC delivers 16,384 levels – 4× the resolution of a 12-bit design (16,384 vs. 4,096 levels – see comparison table below), and 64× the levels of an 8-bit scope. This increases vertical precision and reduces measurement noise, making it easier to detect low-amplitude signals on top of larger waveforms.
The HD3 performs many functions in hardware for real-time speed, and its low-noise front-end reaches roughly half the noise floor of other general-purpose oscilloscopes. (50 µVrms vs. typically >100 µVrms). 16 digital channels make it well suited to inspect digital systems by capturing analog and digital signals together. Compared with Keysight’s ultra-high-end UXR Series, the HD3 brings true 14-bit ADC vertical resolution into a more general-purpose benchtop oscilloscope class.
The differences become clear when comparing key measurement parameters.
Upgrade Your HD3 Purchase
Keysight Calibration
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InfiniiVision HD3 Series Downloads
FAQs
FAQs
Browse certified used inventory, request a quote or buy online, and Keysight handles inspection, calibration, and shipping directly.
Every unit ships with OEM inspection, standard calibration, power cords, and access to Keysight support and documentation.
Yes — every unit is functionally tested and certified by Keysight before resale, backed by the same support organization as new equipment.
Power integrity, serial bus debugging, glitch capture, and general-purpose bench measurements that benefit from 14-bit resolution.
14-bit resolution resolves 4x more amplitude detail than a standard 12-bit scope, making small signals and noise easier to see.
The HD3's native 14-bit ADC delivers a lower noise floor and higher effective resolution than 12-bit or 8-bit alternatives at similar bandwidths.
Fault Hunter is Keysight's automated anomaly-detection feature that continuously compares live waveforms against a baseline to flag rare faults.
Model selection depends on channel count, bandwidth, and memory needs — request a quote and a Keysight specialist can help you match the right configuration.
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