Fluke PM 3380B Autoranging CombiScope, 100 MHz, 2-Channel

The Fluke PM 3380B is a 100 MHz, 2-channel CombiScope that integrates analog and digital storage oscilloscope functionality in a single instrument. Engineered for precision electronics testing and troubleshooting, it delivers dual-mode operation - switching between analog and digital displays to suit different signal conditions and analysis requirements. The instrument combines a bright display, advanced triggering architecture, and versatile measurement capabilities to support detailed waveform characterization and fault isolation.

Technical Specifications

• 100 MHz bandwidth


• Real-time sampling: 200 MS/s (single channel), 100 MS/s (dual channel)


• Equivalent-time sampling: Up to 10 GS/s on repetitive signals


• Peak-detect mode captures transients as narrow as 5 ns Vertical System


• 2 analog input channels; 1 MΩ ± 1% || 15 pF ± 3 pF input impedance


• Vertical range: 2 mV/div to 5 V/div (1-2-5 sequence, full bandwidth)


• Calibrated vernier: 2 mV/div to 12.5 V/div


• Maximum input voltage: 300 V CAT II


• 8-bit ADC resolution; 16-bit memory resolution


• Accuracy (x1 magnification): ± 1% of full scale within central 8 horizontal and 6 vertical divisions Horizontal System & Memory


• Main timebase: 0.5 s/div to 50 ns/div (1-2-5 sequence)


• Delayed timebase: 0.5 ms/div to 50 ns/div


• Fastest sweep speed (x10 magnification): 5 ns/div


• Continuously variable timebase: 1 µs/div to 500 ms/div in 1 µs increments


• Roll mode: 200 s/div to 50 ms/div


• Acquisition memory: 8K samples per trace, expandable to 32K


• Trace storage: 40 waveforms standard; up to 204 traces (512 samples each) with optional expansion Triggering


• Trigger modes: Auto free run, Triggered, Single


• Trigger types: Edge, TV (including HDTV and TV line selection), Pattern, State, Glitch (2 ns)


• Trigger sources: CH1, CH2, External, Line


• Trigger coupling: DC, AC (<10 Hz), LF-reject (30 kHz), HF-reject (30 kHz)


• Trigger level: ± 8 div or automatic within signal peak-peak amplitude


• Event delay, pre-triggering, and post-triggering capabilities Measurements & Display


• Automated voltmeter and time measurement functions


• Cursor measurements: Horizontal, Vertical, Both


• Vertical readout: dV, V1 to ground, V2 to ground, Ratio


• Horizontal readout: dT, 1/dT (Hz), Ratio, Phase


• Cursor measurement accuracy: ± 1% of full scale


• Probe-operated "Touch Hold and Measure" function displays VDC, VRMS, Vpk-pk, and frequency

Key Features

• Dual-mode operation switches between analog and digital storage displays


• Bright display for extended observation sessions


• Peak-detect mode isolates narrow transient events


• Segmented memory for acquisition and reference storage


• Flexible trigger coupling rejects interference across multiple frequency bands

Typical Applications

• Electronics design verification and signal characterization


• Power supply and switching circuit analysis


• Video signal troubleshooting (HDTV and standard TV line triggering)


• Transient and glitch detection


• Repetitive waveform analysis and comparison

Compatibility & Integration External trigger input allows synchronization with external signal sources. Standard and optional memory configurations support various trace storage requirements for post-acquisition analysis and documentation.