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The Tektronix 4 Series MSO is a mixed signal oscilloscope built around FlexChannel technology, available with four or six inputs. Each FlexChannel can be used as a single analog channel displayed as a waveform view, a spectrum view, or both simultaneously, or as eight digital logic inputs when a TLP058 logic probe is attached. The series pairs a 13.3-inch high-definition display with a capacitive multi-touch, pinch-swipe-zoom user interface, bringing analog, digital, and frequency-domain analysis together in one instrument.
An oscilloscope captures electrical signals as waveforms — voltage plotted against time — letting an engineer verify a signal's amplitude, frequency, shape, and timing. The 4 Series MSO is applied to embedded systems, three-phase power electronics, automotive electronics, power supply design, and DC-to-DC power converters, applications that frequently require observing more than four analog signals at once to verify and characterize device performance and to debug system-level issues. The four- and six-channel models provide the additional analog visibility these multi-signal measurements demand.
ValueTronics stocks and holds its own inventory in a 20,000-square-foot secure warehouse at 1675 Cambridge Drive in Elgin, Illinois. Every pre-owned unit is inspected and functionally verified in-house before it ships, while new units ship factory-sealed exactly as received from the manufacturer. Holding inventory directly means the instrument you order is on our own shelves and ready to move.
The 4 Series MSO is offered as two models — the four-channel MSO44 and the six-channel MSO46 — that share the same FlexChannel architecture, 13.3-inch high-definition display, acquisition system, and touch-driven user interface. The series is designed to give better visibility into complex systems, with each FlexChannel input usable as one analog signal or eight digital logic inputs.
Both models offer the same selectable analog bandwidths — 200 MHz, 350 MHz, 500 MHz, 1 GHz, and 1.5 GHz — and every model can be upgraded to a higher bandwidth in the field after purchase. The primary distinction between the two is the number of FlexChannel inputs and the resulting analog and digital channel counts.
Each pre-owned model below is its own dedicated product page with condition-matched pricing. Select the model that fits your channel-count and bandwidth needs, then choose the available condition and configuration on that model's page.
The MSO44 provides four FlexChannel inputs — up to four analog channels and, with TLP058 logic probes, up to 32 digital channels. The MSO46 provides six FlexChannel inputs — up to six analog channels and up to 48 digital channels. Both share the 6.25 GS/s sample rate, 31.25 Mpoint standard record length (62.5 Mpoints optional), and 12-bit ADC, as the comparison table below details.
Optional three-phase electrical analysis is available on the MSO46 only, reflecting its six analog inputs. Aside from channel count and that option, the two models track each other across bandwidth choices, triggering, analysis tools, and connectivity — refer to the comparison table for the per-model figures.
| Model | FlexChannel Inputs | Max Analog Channels | Max Digital Channels |
|---|---|---|---|
| MSO46 | 6 | 6 | 48 |
| MSO44 | 4 | 4 | 32 |
Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below.
| Specification | Value |
|---|---|
| Model Overview | |
| FlexChannel inputs | MSO44: 4; MSO46: 6 |
| Maximum analog channels | MSO44: 4; MSO46: 6 |
| Maximum digital channels (with optional logic probes) | MSO44: 32; MSO46: 48 |
| Auxiliary Trigger Input | ≤300 V RMS (Edge Trigger only) |
| Bandwidth (calculated rise time) | 200 MHz, 350 MHz, 500 MHz, 1 GHz, 1.5 GHz |
| DC Gain Accuracy | 50 Ω: ±1%, (±2.5% at 1 mV/Div and 500 µV/Div settings), de-rated at 0.100%/°C above 30 °C; 1 MΩ and 250 kΩ: ±1.0%, (±2.0% at 1 mV/Div and 500 µV/Div settings) |
| ADC Resolution | 12 bits |
| Vertical Resolution | 8 bits @ 6.25 GS/s; 12 bits @ 3.125 GS/s; 13 bits @ 1.25 GS/s (High Res); 14 bits @ 625 MS/s (High Res); 15 bits @ 312.5 MS/s (High Res); 16 bits @ ≤125 MS/s (High Res) |
| Sample Rate | 6.25 GS/s on all analog / digital channels (160 ps resolution) |
| Record Length (std.) | 31.25 Mpoints on all analog / digital channels |
| Record Length (opt.) | 62.5 Mpoints on all analog / digital channels |
| Waveform Capture Rate, typical | >500,000 wfms/s |
| Arbitrary/Function Generator (opt.) | 13 predefined waveform types with up to 50 MHz output |
| DVM | 4-digit DVM (free with product registration) |
| Trigger Frequency Counter | 8-digit frequency counter (free with product registration) |
| Vertical System - Analog Channels | |
| Bandwidth selections | 50 Ω: 20 MHz, 250 MHz, and the full bandwidth value of your model; 1 MΩ: 20 MHz, 250 MHz, 500 MHz |
| Input coupling | DC, AC |
| Input impedance | 50 Ω ± 1%; 1 MΩ ± 1% with 13.0 pF ± 1.5 pF |
| Input sensitivity range (1 MΩ) | 500 µV/div to 10 V/div in a 1-2-5 sequence |
| Input sensitivity range (50 Ω) | 500 µV/div to 1 V/div in a 1-2-5 sequence |
| Maximum input voltage (50 Ω) | 5 VRMS, with peaks ≤ ±20 V (DF ≤ 6.25%) |
| Maximum input voltage (1 MΩ) | 300 VRMS; derate at 20 dB/decade from 4.5 MHz to 45 MHz; derate at 14 dB/decade from 45 MHz to 450 MHz; > 450 MHz, 5.5 VRMS |
| Position range | ±5 divisions |
| Maximum offset range, 50 Ω (500 µV/div - 99 mV/div) | ±1 V |
| Maximum offset range, 50 Ω (100 mV/div - 1 V/div) | ±10 V |
| Maximum offset range, 1 MΩ (500 µV/div - 63 mV/div) | ±1 V |
| Maximum offset range, 1 MΩ (64 mV/div - 999 mV/div) | ±10 V |
| Maximum offset range, 1 MΩ (1 V/div - 10 V/div) | ±100 V |
| Offset accuracy | ±(0.005 X | offset - position | + 0.2 div (0.4 div in 500 µV/div)) |
| Crosstalk (channel isolation), typical | ≥ 200:1 up to the rated bandwidth for any two channels having equal Volts/div settings |
| Effective Bits (ENOB), typical (High Res, 50 Ω, 10 MHz input, 90% full screen) | |
| 1.5 GHz | 7.1 |
| 1 GHz | 7.6 |
| 500 MHz | 7.9 |
| 350 MHz | 8.2 |
| 250 MHz | 8.2 |
| 20 MHz | 8.9 |
| Vertical System - Digital Channels | |
| Number of channels | 8 digital inputs (D7-D0) per installed TLP058 (traded off for one analog channel) |
| Vertical resolution | 1 bit |
| Minimum detectable pulse width, typical | 1 ns |
| Thresholds | One threshold per digital channel |
| Threshold range | ±40 V |
| Threshold resolution | 10 mV |
| Threshold accuracy | ± [100 mV + 3% of threshold setting after calibration] |
| Input hysteresis, typical | 100 mV at the probe tip |
| Input dynamic range, typical | 30 Vpp for Fin ≤ 200 MHz, 10 Vpp for Fin > 200 MHz |
| Absolute maximum input voltage, typical | ±42 V peak |
| Minimum voltage swing, typical | 400 mV peak-to-peak |
| Input impedance, typical | 100 kΩ |
| Probe loading, typical | 2 pF |
| Horizontal System | |
| Time base range | 200 ps/div to 1,000 s/div |
| Sample rate range | 1.5625 S/s to 6.25 GS/s (real time); 12.5 GS/s to 500 GS/s (interpolated) |
| Record length range (Standard) | 1 kpoints to 31.25 Mpoints in single sample increments |
| Record length range (Option 4-RL-1) | 62.5 Mpoints |
| Maximum duration at highest sample rate | 5 ms (std.) or 10 ms (opt.) |
| Time base delay time range | -10 divisions to 5,000 s |
| Deskew range | -125 ns to +125 ns with a resolution of 40 ps |
| Timebase accuracy | ±2.5 x 10⁻⁶ over any ≥1 ms time interval |
| Timebase factory tolerance | ±5.0 x10⁻⁷ at calibration, 25 °C ambient, over any ≥1 ms interval |
| Temperature stability, typical | ±5.0 x10⁻⁷ |
| Crystal aging | ±1.5 x 10⁻⁶ frequency tolerance change at 25 °C over a period of 1 year |
| Aperture uncertainty | ≤ 0.450 ps + (10⁻¹¹ * Measurement Duration) RMS, for measurements having duration ≤ 100 ms |
| Delay between analog channels, full bandwidth, typical | ≤ 100 ps for any two channels with input impedance set to 50 Ω, DC coupling with equal Volts/div or above 10 mV/div |
Important: Maximum input voltage: 300 V RMS at 1 MΩ; 5 V RMS with peaks not exceeding ±20 V at 50 Ω. Auxiliary Trigger input rated ≤300 V RMS (Edge Trigger only).
Important: Digital channels require TLP058 logic probes, which are ordered separately; each TLP058 provides eight digital inputs in place of one analog channel (Step 7, Add digital probes). The MSO44 accepts 1 to 4 TLP058 probes (8 to 32 digital channels) and the MSO46 accepts 1 to 6 TLP058 probes (8 to 48 digital channels).
Important: Option 4-SEC (enhanced security) must be purchased at the same time as the instrument; it is not available as an upgrade.
Important: Option 4-PWR-BAS is not compatible with option 4-PS2.
Important: The HDMI output requires connection to a high definition (1,920 x 1,080 resolution) display, and the monitor must be attached before powering on the instrument.
Important: 500 µV/div is a 2X digital zoom of 1 mV/div or a 4X digital zoom of 2 mV/div, depending on the instrument bandwidth configuration.
Important: The Arbitrary/Function Generator is optional and upgradable; the Digital Voltmeter (DVM) and Trigger Frequency Counter are free with product registration.
Important: Spectrum View is optional on the analog inputs (simultaneous analog and spectrum views); RF time-domain traces and RF triggering require option 4-SV-RFVT.
Important: Three-Phase Electrical Analysis (option 4-3PHASE) is supported on the MSO46 (six-channel) model only.
This pre-owned unit is inspected and functionally verified in-house before it ships and is backed by our pre-owned warranty. To confirm its exact condition, firmware revision, installed options, or included accessories for your application before ordering, contact our Test Architects.
ValueTronics supplies both new and used test and measurement equipment. New units ship factory-sealed, exactly as received from the manufacturer; every used unit is inspected and functionally verified in-house at our 20,000 sq ft secure facility in Elgin, Illinois before it ships. Our Test Architects can help you select the condition, calibration, and configuration that fit your application.
Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.
Model No
Tektronix
Condition
Pre-Owned
Manufacturer
Tektronix
Osc_ch
6
Osc_freq
200 MHz, 350 MHz, 500 MHz, 1 GHz, 1.5 GHz
Osc_r
50 Ω / 1 MΩ
Osc_sampl
6.25 GS/s
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