Agilent/Keysight 54621D

The Agilent/Keysight 54621D is a 60 MHz mixed-signal oscilloscope combining analog and digital measurement capabilities in a single instrument. It has 2 analog channels and 16 digital channels for simultaneous acquisition of up to 18 signals, making it ideal for debugging mixed analog/digital circuits and microcontroller-based designs.

Technical Specifications

• Analog bandwidth: 60 MHz


• Maximum sample rate: 400 MSa/s


• Memory depth: 2 MB per channel


• Vertical resolution: 8 bits (12 bits in high-resolution mode when ≥200 µs/div in average mode) Analog Channels (2)


• Sensitivity: 1 mV/div to 5 V/div


• Input impedance: 1 MΩ ±1%


• Input capacitance: ~14 pF


• Offset range: ±5 V (ranges 40 dB (DC–20 MHz), >30 dB (20 MHz–60 MHz)


• Input coupling: AC, DC, Ground


• Bandwidth limit: ~20 MHz selectable


• Shipped with 10074C 10:1 probes Digital Channels (16)


• Logic levels: TTL, CMOS, ECL, or user-definable


• User-defined threshold range: ±8.0 V in 10 mV increments Triggering System


• Edge, pulse width, pattern, glitch, TV, sequence, duration, and protocol-based triggering


• Protocol support: I²C, SPI, LIN, CAN, USB, and user-defined serial frames


• TV trigger: NTSC, PAL, PAL-M, SECAM; field and line selectable; 0.5 div sensitivity


• Trigger sources: 2 analog channels, external (1 MΩ ±3%)


• Analog trigger level range: ±6 div

Key Features

• Single-instrument analysis of analog signals and digital logic states


• Auto probe sense compatible with Agilent/HP and Tektronix probes


• Protocol-specific triggering simplifies debugging of I²C, SPI, CAN, LIN, and USB designs


• User-definable logic thresholds accommodate diverse digital signal families

Typical Applications

• Microcontroller firmware development and validation


• Mixed analog/digital circuit debug


• Serial protocol analysis (I²C, SPI, CAN, LIN, USB)


• Composite video signal verification

Compatibility & Integration Auto probe identification supports standard Agilent/HP and Tektronix probe accessories. External triggering input accepts standard trigger signals at 1 MΩ impedance.