Keysight InfiniiVision X-Series: Which Model Should You Buy Used?

Keysight (formerly Agilent) InfiniiVision X-Series oscilloscopes are among the most common bench scopes on the used market. They span entry-level 50 MHz teaching scopes to 6 GHz instruments, across several product generations. The model codes are compact but confusing: an MSOX3104A, a DSOX1202G and an MSOX3054T look similar but differ in bandwidth, channels, generation and features.

This guide explains how to read an InfiniiVision model number, compares the families in one table, and recommends which generation to buy used for common tasks. Every model linked below is listed on wnot.cn.

Why buy InfiniiVision used? The platform has been sold in large numbers to universities, design teams and production lines since 2011, so units, probes and accessories are widely available, and the user interface is consistent across families. An engineer who knows one InfiniiVision model can usually use another without training. Most features are added by license, so the same model can be anything from a basic scope to a well-equipped debugging tool, which is why the model number alone is not enough.

How to read an InfiniiVision model number

An InfiniiVision model number tells you whether the scope has digital channels, which series it belongs to, its bandwidth, its analog channel count and its generation. The pattern is: prefix + series digit + bandwidth code + channel count + generation suffix.

DSOX vs MSOX vs EDUX

• DSOX: digital storage oscilloscope with analog channels only.
• MSOX: mixed signal oscilloscope, which adds digital (logic) channels: 8 on the 1000 X and 2000 X, 16 on the 3000, 4000 and 6000 X-Series.
• EDUX: education models in the 1000 X-Series, aimed at university teaching labs, with features suited to classroom use.

On many models a DSOX can be upgraded to MSO functionality with a license, but you also need the physical logic probe cable.

The digits: series, bandwidth and channel count

The first digit is the series (1, 2, 3, 4 or 6). The last digit is the number of analog channels (2 or 4). The digits between them encode bandwidth, but the code differs by series:

• 1000 X-Series: bandwidth in tens of MHz. DSOX1202G = 1000 series, 20 (200 MHz), 2 channels. DSOX1102A = 100 MHz, 2 channels. EDUX1052A = 50 MHz.
• 2000, 3000 and 4000 X-Series: a two-digit code where 00 = 70 MHz, 01 = 100 MHz, 02 = 200 MHz, 03 = 350 MHz, 05 = 500 MHz, 10 = 1 GHz and 15 = 1.5 GHz. MSOX2024A = 2000 series, 200 MHz, 4 channels. MSOX3104A = 3000 series, 1 GHz, 4 channels. MSOX4154G = 4000 series, 1.5 GHz, 4 channels.
• 6000 X-Series: models such as the DSOX6004A use “00” with bandwidth set by option or license, from 1 GHz to 6 GHz. Check the license screen for the installed bandwidth.

A vs G vs T suffix

The final letter indicates the product generation or variant:

• A: the original X-Series generation (the 2000 X and 3000 X launched in 2011; older units may carry the Agilent brand).
• T: the 3000T X-Series, which added a capacitive touchscreen, zone triggering (draw a box on the screen to trigger on a signal), a higher sample rate and other features over the 3000 X (A).
• G: newer generations. On the 1000 X-Series, G models add an integrated WaveGen function generator and frequency response analysis over the A models. On the 3000 and 4000 X-Series, G models are later updates with feature changes such as an integrated WaveGen and updated software.

Family-by-family comparison

The table summarizes the main InfiniiVision X-Series families. Figures are maximums for each family; individual models vary. Sources: Keysight fact sheet 5992-0192 for current families and archived Keysight datasheets for A-generation models.

1000 X: education and basic debugging

The 1000 X-Series, including the EDUX education models, offers 50 to 200 MHz bandwidth in a compact, low-cost package. It suits teaching labs, basic circuit debugging and service benches. Look at the G models if you want the built-in WaveGen. Examples: 1000 X family, DSOX1202A, DSOX1202G.

Keysight DSOX1202G: representative image from the wnot.cn product page (the site labels it as not a photograph of the exact unit).

2000 X: entry bench work, 70–200 MHz

The 2000 X adds a larger display, more options and AutoProbe support at 70 to 200 MHz. Its standard memory is modest, so check whether the memory upgrade is installed if you capture long serial packets. Examples: 2000 X family, DSOX2004A, MSOX2024A.

3000 X / 3000T / 3000G: the general-purpose sweet spot

The 3000 Series covers 100 MHz to 1 GHz with a high waveform update rate, 16 digital channels on MSO models and a wide range of decode and analysis options. It is the most versatile InfiniiVision family for embedded and mixed-signal work. The 3000T adds touch and zone trigger, which speed up isolating rare events. Examples: 3000T family, MSOX3054T, MSOX3104A, DSOX3054A, Agilent MSOX3054A.

Keysight MSOX3054T: representative image from the wnot.cn product page (the site labels it as not a photograph of the exact unit).

4000 X / 4000G: up to 1.5 GHz, large touchscreen

The 4000 X offers up to 1.5 GHz bandwidth with a 12.1-inch capacitive touchscreen. It suits higher-speed digital and power work where a large display and higher bandwidth help. Examples: 4000 X family, MSOX4104A, MSOX4054G, MSOX4154G.

Keysight MSOX4104A: representative image from the wnot.cn product page (the site labels it as not a photograph of the exact unit).

6000 X: 1–6 GHz

The 6000 X is the highest-bandwidth InfiniiVision family, reaching 6 GHz with a 20 GSa/s sample rate. It bridges the gap between InfiniiVision and Infiniium for RF and high-speed work. Example: 6000 X family, DSOX6004A.

Keysight DSOX6004A: representative image from the wnot.cn product page (the site labels it as not a photograph of the exact unit).

A note on Agilent-branded units: the oscilloscope business moved from Agilent to Keysight in 2014. Earlier units carry the Agilent name, such as the Agilent MSOX3054A, and later units of the same model carry the Keysight name. The model and its specifications are the same; check firmware version and license list as you would for any unit.

The newer InfiniiVision HD3 Series, with a 14-bit ADC, is a different platform and is not covered in detail here.

Which one to buy used: recommendations by task

Match the family to the task rather than buying the highest bandwidth you can afford. The recommendations below assume a typical lab budget.

Education and teaching labs. A 1000 X or EDUX model covers most undergraduate experiments at low cost, and G models add a function generator that saves bench space. For more advanced labs, a 2000 X gives four channels and AutoProbe support. Example: DSOX1202G.

Embedded and serial bus debugging. A 3000 X or 3000T MSO model with 16 digital channels and the serial decode options you need (I²C, SPI, UART, CAN, USB and others) is the common choice. The 3000T’s zone trigger helps with intermittent faults. Example: MSOX3054T.

Power electronics. A four-channel 3000 or 4000 X with the power analysis option and suitable differential and current probes. Choose bandwidth based on switching edge rates; for fast GaN or SiC edges, higher bandwidth helps. Example: MSOX4104A.

RF and high-speed digital. A 4000 X at 1.5 GHz or a 6000 X at up to 6 GHz. For bandwidth above that, or for compliance testing, step up to Infiniium. Examples: MSOX4154G, DSOX6004A.

Licensed options and upgrades to check on a used InfiniiVision

Many InfiniiVision features are licenses tied to the scope’s serial number, so the installed licenses matter as much as the model number.

• Bandwidth upgrades: on many models, bandwidth can be upgraded by license within a series (for example from 100 MHz to 200 MHz).
• Memory upgrades: deeper memory on some series, notably the 2000 X.
• MSO enablement: adds digital channels to a DSOX model; the logic cable is a separate accessory.
• Serial decode and trigger packages: for I²C/SPI, UART/RS-232, CAN/LIN, FlexRay, USB, MIL-STD-1553, I²S and others.
• WaveGen: integrated function generator on models that support it.
• Analysis packages: power analysis, mask testing, frequency response analysis, jitter and others.

Ask for a screenshot of the license screen (typically under Help > About Oscilloscope). For a full pre-purchase process, see our used oscilloscope buying checklist.

Common issues on used units

InfiniiVision scopes are durable, but a few issues come up often on used units. None is unusual for bench equipment, and all can be checked before purchase.

• Rotary encoders: worn knobs can skip or jump. Check every knob.
• Touchscreens: on 3000T, 4000 X and 6000 X models, check that the whole screen responds to touch.
• Fans: check for noisy fans and over-temperature messages.
• Missing logic cables: MSO units are often sold without the digital probe cable.
• Missing probes: passive probes are often sold separately; check the model and compatibility. See プローブ.

If a unit needs attention, see our Repair Services.

Before you pay, ask for a photo of the license screen, a self-test result, a probe-compensation trace on each channel, and a written item list. When the scope arrives, run the self-test and self-calibration, check each channel against a known signal, confirm the licenses match the quote, and test file export and LAN or USB remote control, then report any issue promptly. There is no fixed return window: if an inspection confirms a product-quality issue, TXRX will repair or replace the unit. Returns for reasons other than product quality are not accepted. TXRX inspects and functionally verifies every instrument it sells. TXRX pre-owned equipment comes with a 6-month warranty. For pre-owned units, a calibration certificate or test report is available (as stated in your quotation). New equipment carries the manufacturer’s standard warranty as published by each brand and includes a factory calibration certificate.

InfiniiVision vs Infiniium: when to step up

Step up to Keysight Infiniium when you need more bandwidth, deeper memory, higher resolution or compliance and advanced jitter software. Infiniium scopes such as the EXR258A (up to 8 channels) and MXR608B offer more channels and analysis depth than InfiniiVision, at higher cost. For most embedded, power and general debugging work, InfiniiVision is sufficient. Browse all オシロスコープ.

FAQ

What is the difference between DSOX and MSOX?

A DSOX model has analog channels only. An MSOX model adds digital logic channels: 8 on the 1000 X and 2000 X, and 16 on the 3000, 4000 and 6000 X-Series. The digital channels let you view logic signals and buses alongside analog waveforms. On many models, a DSOX can be upgraded to MSO by license plus a logic cable.

What does the G in MSOX4054G mean?

The G suffix marks a newer generation of the model. On the 1000 X-Series, G models add an integrated WaveGen function generator and frequency response analysis. On the 3000 and 4000 X-Series, G models are later updates with feature changes such as an integrated WaveGen.

Is the 3000T better than the 3000 X?

For most users, yes. The 3000T adds a capacitive touchscreen, zone triggering, a higher sample rate and more standard memory than the original 3000 X (A). The original 3000 X remains a capable scope and is usually less expensive used, so it is a good choice if you do not need these features.

Can I upgrade a used 2000 X to more bandwidth?

On many InfiniiVision models, including the 2000 X, bandwidth upgrades within the series are available as licenses from Keysight, tied to the serial number. Check the current upgrade price and availability before buying a lower-bandwidth model with plans to upgrade; sometimes buying the higher-bandwidth model used costs less.

Which InfiniiVision is best for students and labs?

For teaching labs, the 1000 X-Series and EDUX models are the most common choice: low cost, simple to use and adequate for most coursework. The G models add a built-in function generator. For advanced labs needing four channels or deeper analysis, a 2000 X or a used 3000 X is a practical step up.

Matching a model to your bench? Tell us your bandwidth and channel needs. We’ll match an InfiniiVision unit from stock and confirm its installed licenses before quoting.

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