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Fluke CombiScope® PM 3390B

The PM 3390B, is a 200 MHz, 2-channel CombiScope with Delayed Time Base*

This product is discontinued or reclassified

Fluke CombiScope® PM 3390B
  • The Fluke PM 3380B ...94B series are the world's first AutoRanging Digital Storage Oscilloscopes with a complete Analog Oscilloscope built in.

    Fluke CombiScopes® are a powerful combination of a genuine analog oscilloscope and a powerful digital oscilloscope in one instrument. Designed to fit any budget, there are 5 models in the CombiScope B series: three 2 channel models with bandwidths of 60, 100 or 200 MHz and two 4 channel models with 100 or 200 MHz bandwidth.

    Fluke CombiScopes offer the best of both worlds:



    Download the CombiScope Interactive Demonstration Software

    Download Technical Data for PM3380B/PM3384B/PM3390B/PM3394B (.pdf file format)

  • It can be said that Fluke CombiScopes are digital storage oscilloscopes (DSOs) with an analog mode built-in. Why? Because many users cannot rely only on the capabilities of a pure DSO. Furthermore, some signals do not take kindly to being digitized. Examples include simple AM signals, complex data streams and video signals. If you do not see what you expect, or do not trust what you see, just touch the button to switch operating mode.

    Fast sampling rate

    For repetitive signals the CombiScope PM 3390B & PM 3394B have a equivalent Sampling Rate of no less than 25 GS/s, (10 GS/s for PM 3380B/3384B). Equivalent sampling produces very high time resolution by reconstructing the waveform from different cycles. In this way you can view repetitive signals at a much higher resolution than would be possible with traditional sampling techniques. Additionally the CombiScope incorporates 200 MS/s single shot sampling.

    Analog scope built-in

    DSO's have their advantages, but nothing beats an analog scope's ability to display complex waveforms. You get faster updates and infinite display resolution, both critical when analyzing complex or modulated signals. With an analog scope there is no aliasing. If you doubt the digitized signal in the DSO mode, a simple touch of a button gives you the confidence of a second opinion, in the analog mode. For analog only users there is the

    Deep memory

    The long acquisition memory allows you to scroll through time windows up to 64 screens wide, for convenient viewing of single shot events. Alternatively you can have a higher time axis resolution across a single screen. This allows you to zoom in and study a particular part of the waveform, e.g. to analyze glitches that would otherwise have escaped your attention.

    5 ns digital peak detection

    The oversampling peak detector catches high speed events during real time sampling, finding glitches and eliminating aliasing. The digital peak detector in the CombiScope operates throughout the timebase settings, always displaying the true 100% value of the peak detected.

    Video line counter built-in

    A built-in video line counter with TV line and field triggering gives you the ability to view any line in an NTSC, PAL, SECAM or HDTV system.

    Glitch trigger

    With glitch triggering you can specify exactly the width of pulses or glitches to trigger on as well as the exact voltage level. You cannot be more precise than that! Glitch trigger will catch glitches as short as 2 ns (4 ns on 100 MHz models). Used with the oversampling peak detector, troublesome glitches have no escape.

    Advanced triggering

    Includes Glitch triggering, Logic state and pattern trigger (PM 3384B/3394B), TV triggering with built-in counter, HDTV, event delay and dual slope triggering for transient capture.


    Full remote control is available with the RS-232-C (included with the instrument) and optional GPIB/IEEE-488 interface. Hard copy output to printers or plotters can be made with optional Centronix printer interface adapter. Transfer, archive, analyze and process waveforms using **link to FlukeView® for CombiScopes®.

    Automatically for you!

    With automatic attenuators and timebase (AutoRanging), automatic voltage and time measurements, automatic self calibration, automatic setup (Autoset), automatic cursors and optional automatic pass/fail, these instruments take all the hard work out of using a scope. When you try one in your application, your choice will be automatic too!

    Math + option

    Math + option is now included in all Combiscope B Series. Math + option includes additional test facilities like; FFT analysis, Histogram, Pass/Fail testing and more.

    free math

  • Analog Mode Specifications
    Vertical Deflection (PM 3380B/90B)
    Input Channels:  2 Channels + Ext Trig View
    Frequency Response:  100 MHz
    Deflection Coefficient:  Ch1 & Ch2 (all models): 2 mV/div . 5 V/div in a 1-2-5 sequence or 2 mV/div to 12.5 V/div calibrated continuously variable
    Rise Time (Calculated):  1.75 ns
    Error Limit:  1.3% (Measured over center 6 divisions)
    Input Impedance:  (all models, all channels) 1 MΩ Â±1% // 25 pf ±2 pf
    Max. Rated input voltage:  In 1 MΩ position: 150 Vrms CAT II
       In 50Ω position: 5 Vrms; 50V ac peak ( max of 50 mJ during any 100 ms interval.
    Vertical Deflection (PM 3384B/94B)
    Input Channels:  4 Channels
    Frequency Response:  200 MHz
    Deflection Coefficient:  Ch1 & Ch2 (all models): 2 mV/div . 5 V/div in a 1-2-5 sequence or 2 mV/div to 12.5 V/div calibrated continuously variable
       Ch3 & Ch4 (PM 3384B/94B): 2 mV/div . 5 V/div in a 1-2-5 sequence or 2 mV/div to 12.5 V/div calibrated continuously variable
    Rise Time (Calculated):  1.75 ns
    Error Limit:  1.3% (Measured over center 6 divisions)
    Input Impedance:  (all models, all channels) 1 MΩ Â±1% // 25 pf ±2 pf
       (PM 3390B/94B): user selectable 50Ω Â±1%
    Max. Rated input voltage:  In 1 MΩ position: 150 Vrms CAT II
       In 50Ω position: 5 Vrms; 50V ac peak ( max of 50 mJ during any 100 ms interval.
    Horizontal (Main & Delayed Timebases)
    Display Modes:  Main Timebase (MTB), Delayed Timebase (DTB), Alternate Timebase ( MTB & DTB), X-Y Mode.
    Time Coefficients:  (PM 3380B/3384B): 0.5 s/div to 50 ns/div in a 1-2-5 sequence or calibrated variable control, 1.25 s/div to 50 ns/div.
       (PM 3390B/3394B): 0.5 s/div to 20 ns/div in a 1-2-5 sequence or calibrated variable control, 1.25 s/div to 20 ns/div.
    Fastest Sweep (Magn 10X):  (PM 3380B/3384B) 5 ns/div
       (PM 3390B/3394B) 2 ns/div
    Error Limit (Magn 10X):  Â±1.3% of reading + 0.5% of 8 divisions)
    Triggering (Main & Delayed Timebase)
    Trigger modes:  Auto free run, Triggered, Single, Edge Triggering, TV Triggering
    Edge Triggering
    MTB Trigger Source:  (PM 3380B/3390B): Ch1, Ch2, Ext
       (PM 3384B/3394B): Any input channel or Line (mains); Optional rear mounted External Trigger input replacing line Triggering.
    DTB Trigger Source:  Starts after delay or triggered on any input channel.
    Slope:  Positive or Negative
    Coupling:  DC, AC (> 10 Hz), LF-Rej (30 kHz), HF-Rej (30 kHz)
    Level Range:  Â±8 div or level within signal peak to peak range.
    Level Indication:  On screen level indicators and numeric readout.
    Trigger Sensitivity:  (PM 3380B/3384B): 0.6 div up to 50 MHz, 1.2 div up to 100 MHz, 2.0 div up to 200 MHz
       (PM 3390B/3394B): 0.6 div up to 100 MHz, 1.2 div up to 200 MHz, 2.0 div up to 300 MHz
    TV Triggering
    Video Standard:  HDTV, NTSC, PAL, SECAM standards
    MTB Trigger Source:  CH1 to CH4, Field1, Field2, TV-Lines
    Signal Polarity:  Positive or Negative
    Sensitivity:  0.7 div (Sync Pulse)
    Cursor Measurements
    Cursor Modes:  Horizontal, Vertical, Both
    Readout:  Vertical: dV, V1 to gnd, V2 to gnd, Ratio
       Horizontal: dt, 1/dt (in Hz), Ratio, Phase
    Accuracy (magn 1X):  1% of full scale within the central 8 horizontal and 6 vertical divisions.
    X-Y Mode
    X Deflection Source:  Any input channel or line
    X Deflection Coefficient:  Same as for vertical deflection
    Dynamic range:  20 div up to 100 kHz, > 10 div up to 2 MHz.
    Frequency Response:  32 MHz at -3 dB
    Error Limit:  5% measured over central 6 divisions.
    Phase Shift:  < 3o up to 100 kHz
    Digital Mode Specifications
    Repetitive Sample Rate:  Random sampling gives an equivalent sample rate of up to;
       (PM 3380B/3384B): 10 GS/s
       (PM 3390B/3394B): 25 GS/s
    Single Shot Sample Rate:  Up to 200 MS/s
    Vertical resolution:  ADC resolution: 8 bit
       Memory resolution: 16 bit
    Memory:  (PM 3380B/3390B): Standard Memory: 8 k, max trace storage, 27 traces
       (PM 3380B/3390B): Extended Memory option: 32 k, max trace storage, 153 traces
       (PM 3384B/94B): Standard Memory: 32 k, max trace storage, 204 traces
    Average:  2,4,8 to 4096, giving a resolution of up to 14 bits
    Peak Detection:  Captures glitches up to 5 ns
    Envelope Mode:  For continuous tracking of changing waveforms
    Auto Ranging vertical deflection:  Automatically and continuously adapts the instrument's vertical settings to have 2 to 6 divisions' display of input signal.
    Bandwidth:  See above analog mode specification
    Magnification:  Up to x32 magnification for higher deflection sensitivity.
    Display modes:  Ch1, ± Ch2, Ch3, ± Ch4, calculated add and subtract
    Window Mode:  2 or 4 windows to display two or four traces above each other while using the full dynamic range of the ADC
    Autoranging timebase:  Continuously adapts timebase sweep speed to the frequency of the trigger signal in order to keep 2 to 6 cycles on screen.
    Acquisition modes:  Recurrent (Auto and triggered), Single Shot, Multiple Single Shot, Roll, Triggered Roll
    X-Y Mode:  Any trace in memory or any of the input channels can be used as a X source.
    Single Shot Sampling:  200 s/div to 500 ns/div in a 1-2-5 sequence
    Variable Timebase:  Continuously variable sweep speed; 1us/div to 500 us/div in 1 us increments. 500 us/div to 200 s/div with 0.2% or smaller increments.
    Recurrent:  (PM 3380B/3384B): 200 ns/div to 5 ns/div
       (PM 3390B/3394B): 200 ns/div to 2 ns/div
    Roll Mode:  200 s/div to 200 ms/div, triggered or free roll mode, in a 1-2-5 sequence or continuously variable
    Display Resolution:  Horizontal resolution for 1x magnification: 500 samples = 10 divisions = 1 screen width.
    Magnification:  x2, x4 to x32 to zoom in onto parts of waveform
    Interpolation:  Dots, Sine or Linear
    Trigger Coupling:  Same as analog mode
    Edge Triggering:  Same as analog mode plus; dual slope triggering available when in single shot, real time mode.
    TV Triggering:  Same as analog mode
    Logic trigger modes:  (PM 3380B/3390B): Glitch (time qualified pulse)
       (PM 3384B/3394B): State (4 bit), Pattern (4 bit), Glitch (time qualified pulse)
    Time Delay:  0 to 1,000 div continuously adjustable
    Pre trigger view:  Up to a complete record can be filled with pre-trigger information. (160 div for 8 k, 640 division for 32 k)
    Event Delay:  1 to 16,384 events, max count rate 50 MHz
    Delay Modes:  Starts after time delay or wait for trigger after time delay.
    Cursor Measurements
    Cursor Modes:  Horizontal, Vertical, Both: Free or locked to trace
    Readout:  Vertical: dv, V1 to gnd, V2 to gnd, Ratio
       Horizontal: dt, 1/dt (in Hz), Ratio, Phase (cycle is automatically referenced to trigger signal)
    Calculated Measurements
    Volt:  DC, rms, minimum, maximum, peak to peak, Low level, High level, Overshoot (positive & negative), Pre-shoot (positive & negative)
    Time:  Frequency, Period, Pulsewidth, Rise time, Fall time, Duty cycle
    Delay:  Channel to channel, rising and falling edges.
    Quick Measurements  Probe operated, "Touch Hold And Measure" instantly gives calculated measurements of frequency, dc, rms, and Vp-p.
       Add, Subtract, Multiply, Digital Filter, Integrate, Differentiate, FFT, Histogram, Pass Fail.
    General Specifications
       Selects proper channel, time-base and trigger settings. Function can be customized
       Automatic fine adjustment for enhanced accuracy to get optimal performance even under extreme environmental conditions
    Standard:  RS-232C, CPL protocol
    Options:  IEEE-488.2(GPIB), SCPI
    Hard Copy
    Output:  Printed or plotted hard copy of the screen in digital mode.
    User Text:  Two lines of on-screen text
    Interface:  RS-232C or IEEE-488.2 (GPIB)
    Printer Drivers:  FX Series (9 Pin), LQ1500 (24 Pins), HP 2225 Thinkjet, HP Laserjet, (series II & III), HP 540 Deskjet, and compatibles.
    Plotters:  HP 7440, HP 7550, HP 7475A, HP 7470A and compatibles, HPGL.
    Camera:  Camera Kit PM 9381/001 available as optional accessory.
    Power Supply
    Line Voltage:  100V to 240V (±10%) CAT II
    Line Frequency:  50 Hz to 400 Hz (±10%)
    Power Consumption:  115W (130W with all options installed)
       Meets requirements of EN 61010-1 CAT II Pollution Degree 2, Low Voltage Directive 73/23/EEC, UL3111, CSA C22.2 No 1010-1
       Meets requirements of MIL-STD-461C: Part2 CEO1 (narrow band), Part4 CEO3, Part2 CSO1, Part5 CSO6, (Limited to 300V), Part5 and 6 REO1, Part2 REO2 (max. 1 GHz)
    Setting Memory:  10 complete instrument setups, with battery backup.
    Calibrated output:  600 mv p-p, 2 kHz square wave.
    Z-Modulation Input:  BNC, 10 kΩ > 2.4V=blanked, < 0.5 V=unblanked
    Time Between Calibration:  2000 Hrs or 1 year
       4000 Hrs or 2 year if error limits are doubled.
    Size (excluding handle & feet)
       139 mm H x 341 mm W x 481 mm L
       5.5" H x 13.4" W x 18.9' L
       9.5 kg
       21 lb
       Three-year product warranty, parts and labor. Five year CRT warranty.
    • Model
      Model Name Description  
      Fluke CombiScope® Fluke CombiScope® PM 3390B
      PM 3390B

      200 MHz, 2-channel CombiScope with Delayed Time Base*

    • Manuals
      SCPI Users Manual Download
      PM3370A/B, PM3380A/B,PM3390A/B, PM3382A, PM3384A/B, PM3392A, PM3394A/B Statement of Memory Volatility Download