Use the product only as specified. Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. Carefully read all instructions. Retain these instructions for future reference.

This product shall be used in accordance with local and national codes.

For correct and safe operation of the product, it is essential that you follow generally accepted safety procedures in addition to the safety precautions specified in this manual.

The product is designed to be used by trained personnel only.

Only qualified personnel who are aware of the hazards involved should remove the cover for repair, maintenance, or adjustment.

Before use, always check the product with a known source to be sure it is operating correctly.

This product is not intended for detection of hazardous voltages.

Use personal protective equipment to prevent shock and arc blast injury where hazardous live conductors are exposed.

While using this product, you may need to access other parts of a larger system. Read the safety sections of the other component manuals for warnings and cautions related to operating the system.

When incorporating this equipment into a system, the safety of that system is the responsibility of the assembler of the system.

Before connecting probes or test leads, connect the power cord from the power connector to a properly grounded power outlet.

Keep fingers behind the protective barrier, protective finger guard, or tactile indicator on the probes. Remove all probes, test leads and accessories that are not in use.

Use only correct Measurement Category (CAT), voltage, temperature, altitude, and amperage rated probes, test leads, and adapters for any measurement.

Beware of high voltages

Understand the voltage ratings for the probe you are using and do not exceed those ratings. Two ratings are important to know and understand:

• The maximum measurement voltage from the probe tip to the probe reference lead.
• The maximum floating voltage from the probe reference lead to earth ground.

These two voltage ratings depend on the probe and your application. Refer to the Specifications section of the manual for more information.

WARNING:To prevent electrical shock, do not exceed the maximum measurement or maximum floating voltage for the oscilloscope input BNC connector, probe tip, or probe reference lead.

The Service safety summary section contains additional information required to safely perform service on the product. Only qualified personnel should perform service procedures. Read this Service safety summary and the General safety summary before performing any service procedures.

These terms may appear in this manual:

WARNING:Warning statements identify conditions or practices that could result in injury or loss of life.

CAUTION:Caution statements identify conditions or practices that could result in damage to this product or other property.

These terms may appear on the product:

• DANGER indicates an injury hazard immediately accessible as you read the marking.
• WARNING indicates an injury hazard not immediately accessible as you read the marking.
• CAUTION indicates a hazard to property including the product.

When this symbol is marked on the product, be sure to consult the manual to find out the nature of the potential hazards and any actions which have to be taken to avoid them. (This symbol may also be used to refer the user to ratings in the manual.)

The following symbols(s) may appear on the product.

CAUTION: Refer to Manual

Protective Ground (Earth) Terminal

Chassis Ground

Standby

Functional Earth Terminal

Number of input channels

4 analog channel model: 4 BNC

6 analog channel model: 6 BNC

Input coupling

DC, AC

Input resistance selection

1 MΩ or 50 Ω

✔ Input impedance 1 MΩ DC coupled

1 MΩ ±1%

Input capacitance 1 MΩ DC coupled, typical

13 pF ±1.5 pF

✔ Input impedance 50 Ω, DC coupled

MSO44, MSO46: 50 Ω ±1% (VSWR ≤1.5:1, typical)

MSO44B, MSO46B: 50 Ω ±1% (VSWR ≤1.5:1, typical for frequencies <1GHz, ≤2.0:1 for frequencies equal to or above 1GHz

Maximum input voltage, 1 MΩ

300 V_RMS at the BNC

Derate at 20 dB/decade between 4.5 MHz and 45 MHz; derate 14 dB/decade between 45 MHz and 450 MHz. Above 450 MHz, 5.5 V_RMS

Maximum peak input voltage at the BNC: ±425 V

Maximum input voltage, 50 Ω

5 V_RMS, with peaks ≤ ±20 V (DF ≤6.25%)

Number of Digitized Bits

8 bits at 6.25 GS/s

12 bits at 3.125 GS/s

13 bits at 1.25 GS/s

14 bits at 625 MS/s

15 bits at 250 MS/s

16 bits at 125 MS/s

Displayed vertically with 25 digitization levels (DL) for 8-bit and 400 digitization levels for 12-bit per division, 10.24 divisions dynamic range. DL is the abbreviation for digitization level. A DL is the smallest voltage level change that can be resolved by an 8-bit A-D Converter. This value is also known as an LSB (least significant bit).

Sensitivity range, coarse

1 MΩ

500 µV/div to 10 V/div in a 1-2-5 sequence

50 Ω

500 µV/div to 1 V/div in a 1-2-5 sequence

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

Sensitivity range, fine

1 MΩ

Allows continuous adjustment from 500 µV/div to 10 V/div

50 Ω

Allows continuous adjustment from 500 µV/div to 1 V/div

Sensitivity resolution, fine

≤1% of current setting

✔ DC gain accuracy

Step Gain, 50 Ω

±1.0%, (±2.5% at 1 mV/div and 500 µV/div settings), de-rated at 0.100%/ °C above 30 °C

Step Gain, 1 MΩ

±1.0%, (±2.0% at 1 mV/div and 500 µV/div settings), de-rated at 0.100%/ °C above 30 °C

Variable gain

±1.5%, derated at 0.100%/ °C above 30 °C.

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. As such, it is guaranteed by testing the non-zoomed setting.

Offset ranges, maximum

Input signal cannot exceed maximum input voltage for the 50 Ω input path.

Volts/div setting	Maximum offset range, 50 Ω input
500 µV/div - 99 mV/div	±1 V
100 mV/div - 1 V/div	±10 V

Volts/div setting	Maximum offset range, 1 MΩ input
500 µV/div - 63 mV/div	±1 V
64 mV/div - 999 mV/div	±10 V
1 V/div - 10 V/div	±100 V

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. As such, it is guaranteed by testing the non-zoomed setting.

Position range

±5 divisions

✔ DC Offset accuracy

±(0.010 X | offset - position | + DC balance)

DC Balance is 0.2 div (0.4 div in 500 μV/div)

DC voltage measurement accuracy, Average acquisition mode

Measurement Type	DC Accuracy (In Volts)
Average of ≥ 16 waveforms	±((DC Gain Accuracy) * |reading - (offset - position)| + Offset Accuracy + 0.1 * V/div setting)
Delta volts between any two averages of ≥ 16 waveforms acquired with the same oscilloscope setup and ambient conditions	±(DC Gain Accuracy * |reading| + 0.05 div)

Bandwidth selections

50 Ω: 20 MHz, 250 MHz, and the full bandwidth value of your model

1 MΩ: 20 MHz, 250 MHz, 350 MHz, 500 MHz

350 MHz models cannot be configured to 500 MHz in 1 MΩ mode

✔ Analog bandwidth 50 Ω DC coupled

1.5 GHz models

Volts/Div Setting	Bandwidth
1 mV/div - 1 V/div	DC - 1.50 GHz
500 µV/div - 995 µV/div	DC - 250 MHz

1 GHz models

Volts/Div Setting	Bandwidth
1 mV/div - 1 V/div	DC - 1.00 GHz
500 µV/div - 995 µV/div	DC - 250 MHz

500 MHz models

Volts/Div Setting	Bandwidth
1 mV/div - 1 V/div	DC - 500 MHz
500 µV/div - 995 µV/div	DC - 250 MHz

350 MHz models

Volts/Div Setting	Bandwidth
1 mV/div - 1 V/div	DC - 350 MHz
500 µV/div - 995 µV/div	DC - 250 MHz

200 MHz models

Volts/Div Setting	Bandwidth
1 mV/div - 1 V/div	DC - 200 MHz
500 µV/div - 995 µV/div	DC - 200 MHz

Analog bandwidth, 1 MΩ, typical

All model bandwidths except 350 MHz, 200 MHz

The limits are for ambient temperature of ≤30 °C and the bandwidth selection set to FULL. Reduce the upper bandwidth frequency by 1% for each °C above 30 °C.

Volts/Div Setting	Bandwidth
1 mV/div - 10 V/div	DC - 500 MHz
500 µV/div - 995 µV/div	DC - 250 MHz

350 MHz models

Volts/Div Setting	Bandwidth
1 mV/div - 10 V/div	DC - 350 MHz
500 µV/div - 995 µV/div	DC - 250 MHz

200 MHz models

Volts/Div Setting	Bandwidth
1 mV/div - 10 V/div	DC - 200 MHz
500 µV/div - 995 µV/div	DC - 200 MHz

Analog bandwidth with TPP0500, TPP1000 and TPP0250 probes, typical

The limits are for ambient temperature of ≤30 °C and the bandwidth selection set to FULL. Reduce the upper bandwidth frequency by 1% for each °C above 30 °C.

Instrument	Volts/Div Setting	Bandwidth
1.5 GHz, 1 GHz	5 mV/div - 100 V/div	DC - 1 GHz (TPP1000 Probe)
500 MHz	5 mV/div - 100 V/div	DC - 500 MHz (TPP0500 Probe)
350 MHz	5 mV/div - 100 V/div	DC - 350 MHz (TPP0500 Probe)
200 MHz	5 mV/div - 100 V/div	DC - 200 MHz (TPP0250 Probe)

Lower frequency limit, AC coupled, typical

<10 Hz when AC 1 MΩ coupled. The AC coupled lower frequency limits are reduced by a factor of 10 (<1 Hz) when 10X passive probes are used.

Upper frequency limit, 250 MHz bandwidth limited, typical

250 MHz, ± 25%

Upper frequency limit, 20 MHz bandwidth limited, typical

20 MHz, ± 25 %

Calculated rise time, typical

Model	50 Ω	TP1000 Probe	TPP0500 Probe	TPP0250 Probe
	500 µV-1 V	5 mV-10 V	5 mV-10 V	5 mV-10 V
1.5 GHz	333ps	450ps	900ps	1.8ns
1 GHz	450ps	450ps	900ps	1.8ns
500 MHz	900ps	900ps	900ps	1.8ns
350 MHz	1.3ns	1.3ns	1.3ns	1.8ns
200 MHz	2.3ns	2.3ns	2.3ns	2.3ns

Peak Detect or Envelope mode pulse response, typical

Minimum pulse width is >640 ps (6.25 GS/s)

Effective bits (ENOB), typical

Typical effective bits for a 9-division p-p sine-wave input, 50 mV/div, 50-Ω

Sample mode, 50 Ω, 50 mV/div

Bandwidth	Input frequency	ENOB at 6.25 GS/s
1.5 GHz	10 MHz	6.80
1.5 GHz	300 MHz	6.80
1 GHz	10 MHz	7.10
1 GHz	300 MHz	7.10
500 MHz	10 MHz	7.40
500 MHz	150 MHz	7.40
350 MHz	10 MHz	7.60
350 MHz	100 MHz	7.60
250 MHz	10 MHz	7.60
250 MHz	100 MHz	7.60
200 MHz	10 MHz	7.60
200 MHz	100 MHz	7.60
20 MHz	10 MHz	7.70

High Res mode, 50 Ω, 50 mV/div

Bandwidth	Input frequency	ENOB at 6.25 GS/s
1.5 GHz	10 MHz	7.10
1.5 GHz	300 MHz	7.10
1 GHz	10 MHz	7.60
1 GHz	300 MHz	7.60
500 MHz	10 MHz	7.90
500 MHz	150 MHz	7.90
350 MHz	10 MHz	8.20
350 MHz	100 MHz	8.20
250 MHz	10 MHz	8.20
250 MHz	100 MHz	8.20
200 MHz	10 MHz	8.20
200 MHz	100 MHz	8.20
20 MHz	10 MHz	8.90

Random noise, Sample and High Res Acquisition modes, 50 Ω and 1 MΩ, 6.25 Gs/s

✔ 1.5 GHz models, Sample mode (RMS), 50 Ω

V/div	1.5 GHz
1 mV/div	635 μV
2 mV/div	635 μV
5 mV/div	817 μV
10 mV/div	843 μV
20 mV/div	920 μV
50 mV/div	1.582 mV
100 mV/div	3.686 mV
1 V/div	23.753 mV

MSO44 and MSO46, Sample mode (RMS), 50 Ω, typical

V/div	1.5 GHz	1 GHz	500 MHz	350 MHz	250/200 MHz	20 MHz
1 mV/div	490 μV	300 μV	220 μV	145 μV	120 μV	80 μV
2 mV/div	490 μV	350 μV	220 μV	150 μV	130 μV	80 μV
5 mV/div	630 μV	380 μV	230 μV	175 μV	160 μV	110 μV
10 mV/div	650 μV	400 μV	280 μV	220 μV	215 μV	155 μV
20 mV/div	710 μV	510 μV	410 μV	340 μV	340 μV	260 μV
50 mV/div	1.220 mV	980 μV	890 μV	760 μV	760 μV	630 μV
100 mV/div	2.84 mV	2.23 mV	1.93 mV	1.61 mV	1.61 mV	1.25 mV
1 V/div	18.3 mV	19.0 mV	17.3 mV	15.0 mV	15.0 mV	12.5 mV

MSO44B and MSO46B, Sample mode (RMS), 50 Ω, typical

V/div	1.5 GHz	1 GHz	500 MHz	350 MHz	250/200 MHz	20 MHz
1 mV/div	520 μV	320 μV	210 μV	150 μV	120 μV	80 μV
2 mV/div	520 μV	350 μV	220 μV	150 μV	120 μV	80 μV
5 mV/div	620 μV	380 μV	230 μV	175 μV	160 μV	110 μV
10 mV/div	620 μV	400 μV	270 μV	220 μV	215 μV	180 μV
20 mV/div	720 μV	510 μV	410 μV	360 μV	370 μV	320 μV
50 mV/div	1.30 mV	1.05 mV	930 μV	880 μV	900 μV	700 μV
100 mV/div	3.00 mV	2.23 mV	1.93 mV	1.74 mV	1.78 mV	1.45 mV
1 V/div	21.0 mV	19.3 mV	18.1 mV	17.5 mV	17.6 mV	14.0 mV

✔ All models except 1.5 GHz, High Res mode (RMS), 50 Ω

V/div	1 GHz	500 MHz	350 MHz	250/200 MHz	20 MHz
1 mV/div	336 μV	259 μV	194 μV	161 μV	96 μV
2 mV/div	363 μV	259 μV	194 μV	161 μV	96 μV
5 mV/div	394 μV	304 μV	239 μV	174 μV	96 μV
10 mV/div	434 μV	356 μV	284 μV	206 μV	103 μV
20 mV/div	551 μV	466 μV	349 μV	298 μV	141 μV
50 mV/div	1.038 mV	1.038 mV	739 μV	596 μV	259 μV
100 mV/div	2.102 mV	1.596 mV	1.349 mV	1.349 mV	609 μV
1 V/div	16.874 mV	12.850mV	11.617 mV	11.617 mV	4.906 mV

MSO44 and MSO46, except 1.5 GHz, High Res mode (RMS), 50 Ω, typical

V/div	1 GHz	500 MHz	350 MHz	250/200 MHz	20 MHz
1 mV/div	260 μV	200 μV	150 μV	125 μV	75 μV
2 mV/div	280 μV	200 μV	150 μV	125 μV	75 μV
5 mV/div	305 μV	235 μV	185 μV	135 μV	75 μV
10 mV/div	335 μV	275 μV	220 μV	160 μV	80 μV
20 mV/div	425 μV	360 μV	270 μV	230 μV	110 μV
50 mV/div	800 μV	800 μV	570 μV	460 μV	200 μV
100 mV/div	1.62 mV	1.23 mV	1.04 mV	1.04 mV	480 μV
1 V/div	13.0 mV	9.90 mV	8.95 mV	8.95 mV	3.78 mV

MSO44B and MSO46B, except 1.5 GHz, High Res mode (RMS), 50 Ω, typical

V/div	1 GHz	500 MHz	350 MHz	250/200 MHz	20 MHz
1 mV/div	280 μV	210 μV	150 μV	125 μV	75 μV
2 mV/div	280 μV	210 μV	150 μV	125 μV	75 μV
5 mV/div	300 μV	230 μV	185 μV	135 μV	75 μV
10 mV/div	330 μV	260 μV	220 μV	160 μV	80 μV
20 mV/div	420 μV	350 μV	270 μV	230 μV	110 μV
50 mV/div	800 μV	780 μV	570 μV	460 μV	200 μV
100 mV/div	1.65 mV	1.29 mV	1.04 mV	1.04 mV	480 μV
1 V/div	13.0 mV	10.0 mV	8.95 mV	8.95 mV	3.78 mV

MSO44 and MSO46, Sample mode (RMS), 1 MΩ, typical

V/div	500 MHz	350 MHz	250/200 MHz	20 MHz
1 mV/div	210 μV	140 μV	120 μV	78 μV
2 mV/div	210 μV	140 μV	120 μV	78 μV
5 mV/div	230 μV	160 μV	135 μV	96 μV
10 mV/div	270 μV	200 μV	190 μV	135 μV
20 mV/div	370 μV	300 μV	300 μV	240 μV
50 mV/div	760 μV	600 μV	650 μV	750 μV
100 mV/div	1.75 mV	1.350 mV	1.45 mV	1.22 mV
1 V/div	19.00 mV	15.25 mV	15.70 mV	11.20 mV

MSO44B and MSO46B, Sample mode (RMS), 1 MΩ, typical

V/div	500 MHz	350 MHz	250/200 MHz	20 MHz
1 mV/div	220 μV	150 μV	120 μV	75 μV
2 mV/div	220 μV	150 μV	120 μV	75 μV
5 mV/div	230 μV	170 μV	135 μV	100 μV
10 mV/div	270 μV	210 μV	200 μV	170 μV
20 mV/div	370 μV	300 μV	300 μV	240 μV
50 mV/div	760 μV	600 μV	650 μV	750 μV
100 mV/div	1.75 mV	1.350 mV	1.45 mV	1.22 mV
1 V/div	19.00 mV	15.25 mV	15.70 mV	11.20 mV

MSO44 and MSO46, High Res mode (RMS), 1 MΩ, typical

V/div	500 MHz	350 MHz	250/200 MHz	20 MHz
1 mV/div	200 μV	140 μV	120 μV	75 μV
2 mV/div	200 μV	140 μV	120 μV	75 μV
5 mV/div	210 μV	150 μV	130 μV	75 μV
10 mV/div	230 μV	160 μV	150 μV	80 μV
20 mV/div	280 μV	200 μV	200 μV	100 μV
50 mV/div	520 μV	370 μV	410 μV	180 μV
100 mV/div	1.24 mV	880 μV	930 μV	460 μV
1 V/div	14.3 mV	10.20 mV	10.30 mV	5.45 mV

MSO44B and MSO46B, High Res mode (RMS), 1 MΩ, typical

V/div	500 MHz	350 MHz	250/200 MHz	20 MHz
1 mV/div	200 μV	150 μV	120 μV	70 μV
2 mV/div	210 μV	150 μV	120 μV	70 μV
5 mV/div	220 μV	160 μV	130 μV	70 μV
10 mV/div	230 μV	170 μV	150 μV	75 μV
20 mV/div	300 μV	230 μV	220 μV	100 μV
50 mV/div	550 μV	450 μV	450 μV	200 μV
100 mV/div	1.35 mV	1.00 mV	1.03 mV	480 μV
1 V/div	15.0 mV	11.5 mV	11.5 mV	5.80 mV

✔ All models, High Res mode (RMS), 1 MΩ

V/div	500 MHz	350 MHz	250/200 MHz	20 MHz
1 mV/div	259 μV	181 μV	155 μV	96 μV
2 mV/div	259 μV	181 μV	155 μV	96 μV
5 mV/div	271 μV	194 μV	168 μV	96 μV
10 mV/div	298 μV	206 μV	194 μV	103 μV
20 mV/div	363 μV	259 μV	259 μV	129 μV
50 mV/div	674 μV	479 μV	531 μV	233 μV
100 mV/div	1.609 mV	1.141 mV	1.206 mV	596 μV
1 V/div	18.561 mV	13.239 mV	13.369 mV	7.074 mV

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

Deskew range

MSO44, MSO46: -125 ns to +125 ns with a resolution of 40 ps

MSO44B, MSO46B: -125 ns to +125 ns with a resolution of 40 ps (for Peak Detect and Envelope acquisition modes). -125 ns to +125 ns with a resolution of 1 ps (for all other acquisition modes).

Crosstalk (channel isolation), typical

≥ 200:1 up to the rated bandwidth for any two channels having equal Volts/div settings

Total probe power

TekVPI+ Compliant probe interfaces: (4 per MSO44, 6 per MSO46) and 1 TekVPI interface for Aux In

MSO46: 80 W maximum (40 W maximum for channels 1-3, 40 W maximum for channels 4-6 and Aux In)

MSO44: 80 W maximum (40 W maximum for channels 1-3, 40 W maximum for channel 4 and Aux In)

Probe power per channel

Voltage	Max Amperage	Voltage Tolerance
5 V	60 mA	±10%
12 V	1.67 A (20 W maximum software limit)	±10%

TekVPI interconnect

All analog channel inputs on the front panel conform to the TEKVPI specification.

Trigger bandwidth (edge, pulse, and logic)

1.5 GHz models, Edge = 1.5 GHz

1.5 GHz models, Pulse and Logic = 1 GHz

1 GHz models = 1 GHz

500 MHz models = 500 MHz

350 MHz models = 350 MHz

200 MHz models = 200 MHz

Edge-type trigger sensitivity, DC coupled, typical

Path	Range	Specification
1 MΩ path (all models)	0.5 mV/div to 0.99 mV/div	4.5 div from DC to instrument bandwidth
	≥ 1 mV/div	The greater of 5 mV or 0.7 div
50 Ω path, all models		The greater of 5.6 mV or 0.7 div for frequencies between DC and 500 MHz or the instrument bandwidth (whichever is lower)
		The greater of 7 mV or 0.8 div for frequencies above 500 MHz (if applicable)

Trigger jitter, typical

≤ 7 ps_RMS

Edge-type trigger sensitivity, not DC coupled, typical

Trigger Coupling	Typical Sensitivity
NOISE REJ	2.5 times the DC Coupled limits
HF REJ	1.0 times the DC Coupled limits from DC to 50 kHz. Attenuates signals above 50 kHz.
LF REJ	1.5 times the DC Coupled limits for frequencies above 50 kHz. Attenuates signals below 50 kHz.

Logic-type triggering, minimum logic or rearm time, typical

t_rise is rise time of the instrument.

Triggering type	Pulse width	Rearm time	Time skew needed for 100% and no triggering
Logic	160 ps + trise	160 ps + trise	>360 ps / <150 ps
Time qualified logic	320 ps + trise	320 ps + trise	>360 ps / <150 ps

For Logic, time between channels refers to the length of time a logic state derived from more than one channel must exist to be recognized. For Events, the time is the minimum time between a main and delayed event that will be recognized if more than one channel is used.

Minimum clock pulse widths for setup/hold time violation trigger, typical

t_rise is rise time of the instrument.

Minimum pulsewidth, clock active	Minimum pulsewidth, clock inactive
320 ps + trise	320 ps +trise

Active pulsewidth is the width of the clock pulse from its active edge (as defined in the Clock Edge menu item) to its inactive edge. Inactive pulsewidth is the width of the pulse from its inactive edge to its active edge.

Setup/hold violation trigger, setup and hold time ranges, typical

Feature	Min	Max
Setup Time	0 ns	20 s
Hold Time	0 ns	20 s
Setup + Hold Time	320 ps	22 s

Input coupling on clock and data channels must be the same.

For Setup Time, positive numbers mean a data transition before the clock.

For Hold Time, positive numbers mean a data transition after the clock edge.

Setup + Hold Time is the algebraic sum of the Setup Time and the Hold Time programmed by the user.

Pulse type trigger, minimum pulse, rearm time, transition time

Pulse class	Minimum pulse width	Minimum rearm time
Runt	160 ps + trise	160 ps + trise
Time-Qualified Runt	160 ps + trise	160 ps + trise
Width	160 ps + trise	160 ps + trise
Slew Rate (minimum transition time)	160 ps + trise	160 ps + trise

For trigger class width, pulse width refers to the width of the pulse being measured. Rearm time refers to the time between pulses.

For trigger class runt, pulse width refers to the width of the pulse being measured. Rearm time refers to the time between pulses.

For trigger class slew rate, pulse width refers to the delta time being measured. Rearm time refers to the time it takes the signal to cross the two trigger thresholds again.

t_rise is rise time of the instrument.

Active pulsewidth is the width of the clock pulse from its active edge (as defined in the Clock Edge menu item) to its inactive edge

Inactive pulsewidth is the width of the pulse from its inactive edge to its active edge.

Transition time trigger, delta time range

160 ps to 20 s.

Time range for glitch, pulse width, timeout, time-qualified runt, or time-qualified window triggering

160 ps to 20 s.

Time accuracy for pulse, glitch, timeout, or width triggering

Time Range	Accuracy
320 ps to 500 ns	±(160 ps + (Time-Base-Accuracy * Setting))
520 ns to 10 s	±(160 ps + (Time-Base-Accuracy * Setting))

B trigger after events, minimum pulse width and maximum event frequency, typical

Minimum pulse width: 160 ps + t_rise

Maximum event frequency: Instrument bandwidth.

t_rise is rise time of the instrument.

B trigger, minimum time between arm and trigger, typical

320 ps

For trigger after time, this is the time between the end of the time period and the B trigger event.

For trigger after events, this is the time between the last A trigger event and the first B trigger event.

B trigger after time, time range

160 ps to 20 seconds

B trigger after events, event range

1 to 65,471

Trigger level ranges

Source	Range
Any Channel	±5 divs from center of screen
Aux In Trigger, typical	±8 V
Line	Fixed at about 50% of line voltage

This specification applies to logic and pulse thresholds.

Trigger holdoff range

0 ns to 20 seconds

Optional serial bus interface triggering

Please refer to the Serial Triggering and Analysis Datasheet, located on the tek.com, for information on available serial triggering options and their triggering capabilities.

Digital channel maximum sample rate

6.25 GS/s

Transition detect (digital peak detect)

Displayed data at sample rates less than 6.25 GS/s (decimated data), that contains multiple transitions between sample points will be displayed with a bright white colored edge.

Digital-To-Analog trigger skew

3 ns

Digital to digital skew

3 ns from bit 0 of any TekVPI channel to bit 0 of any TekVPI channel.

Digital skew within a FlexChannel

MSO44, MSO46: <160 ps within any TekVPI channel

MSO44B, MSO46B: <200 ps within any TekVPI channel

Measurement types

DC, AC_RMS+DC, AC_RMS

Voltage resolution

4 digits

✔ Voltage accuracy

DC:

±((1.5% * |reading - offset - position|) + (0.5% * |(offset - position)|) + (0.1 * Volts/div))

De-rated at 0.100%/°C of |reading - offset - position| above 30 °C

Signal ± 5 divisions from screen center

AC:

MSO44, MSO46: ± 2% (40 Hz to 1 kHz) with no harmonic content outside 40 Hz to 1 kHz range

MSO44B, MSO46B: ± 3% (40 Hz to 1 kHz) with no harmonic content outside 40 Hz to 1 kHz range

AC, typical: ± 2% (20 Hz to 10 kHz)

For AC measurements, the input channel vertical settings must allow the V_PP input signal to cover between 4 and 10 divisions and must be fully visible on the screen

✔ Accuracy

±(1 count + time base accuracy * input frequency)

The signal must be at least 8 mV_pp or 2 div, whichever is greater.

✔ Maximum input frequency

10 Hz to maximum bandwidth of the analog channel

MSO44, MSO46: The signal must be at least 8 mV_pp or 2 div, whichever is greater.

MSO44B, MSO46B: The signal must be at least 8 mV_pp or 3 div, whichever is greater.

Resolution

8-digits

Function types

Arbitrary, sine, square, pulse, ramp, triangle, DC level, Gaussian, Lorentz, exponential rise/fall, sin(x)/x, random noise, Haversine, Cardiac

Amplitude range

Values are peak-to-peak voltages

Waveform	50 Ω	1 MΩ
Arbitrary	10 mV to 2.5 V	20 mV to 5 V
Sine	10 mV to 2.5 V	20 mV to 5 V
Square	10 mV to 2.5 V	20 mV to 5 V
Pulse	10 mV to 2.5 V	20 mV to 5 V
Ramp	10 mV to 2.5 V	20 mV to 5 V
Triangle	10 mV to 2.5 V	20 mV to 5 V
Gaussian	10 mV to 1.25 V	20 mV to 2.5 V
Lorentz	10 mV to 1.2 V	20 mV to 2.4 V
Exponential Rise	10 mV to 1.25 V	20 mV to 2.5 V
Exponential Fall	10 mV to 1.25 V	20 mV to 2.5 V
Sine(x)/x	10 mV to 1.5 V	20 mV to 3.0 V
Random Noise	10 mV to 2.5 V	20 mV to 5 V
Haversine	10 mV to 1.25 V	20 mV to 2.5 V
Cardiac	10 mV to 2.5 V	20 mV to 5 V

Maximum sample rate

250 MS/s

Arbitrary function record length

128 K Samples

Sine waveform

Frequency range

0.1 Hz to 50 MHz

Frequency setting resolution

0.1 Hz

Amplitude flatness, typical

MSO44, MSO46: ±0.5 dB at 1 kHz

MSO44B, MSO46B: ±1.0 dB at 1 kHz

±1.5 dB at 1 kHz for < 20 mV_pp amplitudes

Total harmonic distortion, typical

MSO44, MSO46: 1% for amplitude ≥ 200 mV_pp into 50 Ω load

MSO44B, MSO46B: 1.5% for amplitude ≥ 200 mV_pp into 50 Ω load

MSO44, MSO46: 2.5% for amplitude > 50 mV AND < 200 mV_pp into 50 Ω load

MSO44B, MSO46B: 3.5% for amplitude > 50 mV AND < 200 mV_pp into 50 Ω load

This is for Sine wave only.

Spurious free dynamic range, typical

MSO44, MSO46: 40 dB (V_pp ≥ 0.1 V); 30 dB (V_pp ≥ 0.02 V), 50 Ω load

MSO44B, MSO46B: 35 dB (V_pp ≥ 0.2 V), 50 Ω load

Square and pulse waveform

Frequency range

0.1 Hz to 25 MHz

Frequency setting resolution

0.1 Hz

Duty cycle range

10% - 90% or 10 ns minimum pulse, whichever is larger

Minimum pulse time applies to both on and off time, so maximum duty cycle will reduce at higher frequencies to maintain 10 ns off time

Duty cycle resolution

0.1%

Minimum pulse width, typical

10 ns. This is the minimum time for either on or off duration.

Rise/Fall time, typical

MSO44, MSO46: 5.5 ns, 10% - 90%

MSO44B, MSO46B: 6 ns, 10% - 90%

Pulse width resolution

100 ps

Overshoot, typical

MSO44, MSO46: < 4 % for signal steps greater than 100 mV_pp

MSO44B, MSO46B: < 6% for signal steps greater than 100 mV_pp

This applies to overshoot of the positive-going transition (+overshoot) and of the negative-going (-overshoot) transition

Asymmetry, typical

±1% ±5 ns, at 50% duty cycle

Jitter, typical

< 60 ps TIE_RMS, ≥ 100 mV_pp amplitude, 40%-60% duty cycle

Cardiac maximum frequency

MSO44, MSO46: 1 MHz

MSO44B, MSO46B: 500 kHz

Ramp and triangle waveform

Frequency range

0.1 Hz to 500 kHz

Frequency setting resolution

0.1 Hz

Variable symmetry

0% - 100%

Symmetry resolution

0.1%

DC level range

±2.5 V into Hi-Z

±1.25 V into 50 Ω

Gaussian pulse, Haversine, and Lorentz pulse

Maximum frequency

5 MHz

Exponential rise fall maximum frequency

5 MHz

Sin(x)/x

Maximum frequency

2 MHz

Random noise amplitude range

20 mV_pp to 5 V_pp into Hi-Z

10 mV_pp to 2.5 V_pp into 50 Ω

For both isolated noise signal and additive noise signal.

✔ Sine, ramp, square and pulse frequency accuracy

1.3 x 10^-4 (frequency ≤10 kHz)

5.0 x 10^-5 (frequency >10 kHz)

Signal amplitude resolution

1 mV (Hi-Z)

500 μV (50 Ω)

✔ Signal amplitude accuracy

±[ (1.5% of peak-to-peak amplitude setting) + (1.5% of absolute DC offset setting) + 1 mV ] (frequency = 1 kHz)

DC offset range

±2.5 V into Hi-Z

±1.25 V into 50 Ω

DC offset resolution

1 mV (Hi-Z)

500 μV (50 Ω)

✔ DC offset accuracy

±[ (1.5% of absolute offset voltage setting) + 1 mV ]

Add 3 mV of uncertainty per 10 °C change from 25 °C ambient. Refer DC Offset Accuracy test record

Display type

MSO44, MSO46: Display area - 11.38 inches (289 mm) (H) x 6.51 inches (165 mm) (V), 13.3 inches (338 mm) diagonal, 6-bit RGB color, TFT liquid crystal display (LCD) with capacitive touch

MSO44B, MSO46B: Display area - 11.57 inches (293.76 mm) (H) x 6.5 inches (165.24 mm) (V), 13.3 inches (338 mm) diagonal, 6-bit RGB color, optically-bonded liquid crystal display (LCD) with capacitive touch

Resolution

1,920 horizontal × 1,080 vertical pixels

Luminance, typical

MSO44, MSO46: 400 cd/m², (Minimum: 320 cd/m² )

MSO44B, MSO46B: 270 cd/m²

Display luminance is specified for a new display set at full brightness.

Host processor

MSO44, MSO46: Texas Instruments AM5728

MSO44B, MSO46B: Intel x6413E at 1.5 GHz (HFM) / 3.0 GHz (Turbo). Elkhart Lake 4-Core.

Operating system

Closed Linux

Ethernet interface

An 8-pin RJ-45 connector that supports 10/100/1000 Mb/s

Video signal output

A 29-pin HDMI connector

MSO44, MSO46: Recommended resolution: 1920 x 1080 @ 60 Hz. Video out may not be hot pluggable. HDMI cable may need to be attached before power up for dual display functions to work depending upon the instrument firmware revision

MSO44B, MSO46B: Supported resolution: 1920 x 1080 @ 60 Hz only. Hot plug support.

USB interface (Host, Device ports)

Front panel USB Host ports: Three USB 2.0 Hi-Speed ports

MSO44, MSO46: Rear panel USB Host ports: Two USB 2.0 Hi-Speed ports

MSO44B, MSO46B: Rear panel USB Host ports: Two USB 3.1 SuperSpeed ports

Rear panel USB Device port: One USB 2.0 Hi-Speed Device port providing USBTMC support

Probe compensator signal output voltage and frequency, typical

Output voltage amplitude:

2.5 V ±2% (nominally 0-2.5V)

Output frequency:

1 kHz ±25%

Output source impedance

nominally 1kΩ

Auxiliary output, AUX OUT, Trigger Out, Event, or Reference Clock Out

Selectable output

Acquisition Trigger Out

Reference Clock Out

AFG Trigger Out

Acquisition Trigger Out

User selectable transition from HIGH to LOW, or LOW to HIGH, indicates the trigger occurred. The signal returns to its previous state after approximately 100 ns

Acquisition trigger jitter

380 ps (peak-to-peak)

Reference Clock Out

Reference clock output tracks the acquisition system and can be referenced from either the internal clock reference or the external clock reference

AFG Trigger Out

The output frequency is dependent on the frequency of the AFG signal as shown in the following table:

AFG signal frequency	AFT trigger frequency
≤ 4.9 MHz	Signal frequency
> 4.9 MHz to 14.7 MHz	Signal frequency / 3
> 14.7 MHz to 24.5 MHz	Signal frequency / 5
> 24.5 MHz to 34.3 MHz	Signal frequency / 7
> 34.3 MHz to 44.1 MHz	Signal frequency / 9
> 44.1 MHz to 50 MHz	Signal frequency / 11

AUX OUT Output Voltage

Characteristic	Limits
Vout (HI)	≥ 2.5 V open circuit; ≥ 1.0 V into a 50 Ω load to ground
Vout (LO)	≤ 0.7 V into a load of ≤ 4 mA; ≤0.25 V into a 50 Ω load to ground

External reference input

Nominal input frequency

10 MHz

Frequency Variation Tolerance

9.99996 MHz to 10.00004 MHz (±4.0 x 10^-6)

Sensitivity, typical

V_in 1.5 V_p-p using a 50 Ω termination

Maximum input signal

7 V_pp

Impedance

MSO44, MSO46: 1.2 K Ohms ±20% in parallel with 18 pf ±5 pf at 10 MHz

MSO44B, MSO46B: 800 Ohms ±20% with 18 pf ±20% to ground at 10 MHz

Nonvolatile memory retention time, typical

No time limit for front panel settings, saved waveforms, setups, product licensing, and calibration constants.

Real-time clock

A programmable clock providing time in years, months, days, hours, minutes, and seconds.

MSO44 and MSO46 Nonvolatile memory capacity

32 GB Primary MMC

Stores the operating system, application software and factory data. No user data

32 GB Secondary MMC

Stores saved setups and waveforms, Ethernet settings, log files, user data and user settings

2 Kbit EEPROM

Memory on the main board that stores the instrument serial number, instrument start up count, total uptime factory data, security option passwords, and user-settable security option passwords

1 Kbit EEPROM

Memory on the main board that stores power management controller factory data

1 KB Flash Memory

Memory on the main board that stores the SODIMM memory configuration data (SPD). Two to four pieces depending on model

32 KB Flash Memory

Memory on the main board that stores microcontroller firmware. Two pieces

64 KB Flash Memory

Memory on the main board that stores microcontroller firmware. Two pieces

MSO44B and MSO46B Nonvolatile memory capacity

eMMC 64G

Stores host instrument Linux operating system, application software, and user data including waveforms and measurement results, and instrument settings

Stores user data and user settings

Written through the user interface (UI), application software operations, factory operations and programmatic command

Located on the Processor Board

User accessible

To clear, remove and dispose of processor board

To sanitize, remove and dispose of processor board

NOR Flash 32 MB

Stores host processor bootloader

No user data

Access method is indirect

Written by factory operations

Located on the Processor Board

Not user accessible

Clearing or sanitizing: Not applicable, does not contain user data or settings

2 Kbit EEPROM

Stores factory data, maintenance data

No user data

Access method is indirect

Written by factory operations

Located on the Main Board

User accessible

Clearing or sanitizing: Not applicable, does not contain user data or settings

1 Kbit EEPROM

Stores power management controller factory data, maintenance data

No user data

Access method is indirect

Written by application software operations

Located on the Acquisition Board

Not user accessible

Clearing or sanitizing: Not applicable, does not contain user data or settings

1 Kbit EEPROM

Stores the host processor memory configuration data (SPD)

No user data

Access method is indirect

Written by factory operations

Located on the Processor Board

Not user accessible

Clearing or sanitizing: Not applicable, does not contain user data or settings

1 KB Flash Memory

Two to four pieces depending on model

Stores the SODIMM memory configuration data (SPD)

No user data

Access method is indirect

Written by factory operations

Located on the Acquisition Board

Not user accessible

Clearing or sanitizing: Not applicable, does not contain user data or settings

32 KB Flash Memory

Stores power management micro-controller firmware

No user data

Access method is indirect

Written by application software operations

Internal to the MC9S08 micro-controller on the Main Board

Not user accessible

Clearing or sanitizing: Not applicable, does not contain user data or settings

32 KB FRAM Memory

Stores host processor power sequencer micro-controller firmware

No user data

Access method is indirect

Written by application software operations

Internal to the MSP430 micro-controller on the Processor Board

Not user accessible

Clearing or sanitizing: Not applicable, does not contain user data or settings

64 KB Flash Memory

Stores analog front end micro-controller firmware

No user data

Access method is indirect

Written by application software operations

Internal to the KL14 micro-controller on the Acquisition Board

Not user accessible

Clearing or sanitizing: Not applicable, does not contain user data or settings

256 KB Flash Memory

Stores front panel micro-controller firmware

No user data

Access method is indirect

Written by application software operations

Internal to the TIVA TM4C micro-controller on the Acquisition Board

Not user accessible

Clearing or sanitizing: Not applicable, does not contain user data or settings

64 MB Flash Memory

Stores the FPGA configuration

No user data

Access method is indirect

Written by application software operations

Located on the Acquisition Board

Not user accessible

Clearing or sanitizing: Not applicable, does not contain user data or settings

64 MB Flash Memory

Stores backup copy of the FPGA configuration

No user data

Access method is indirect

Written by application software operations

Located on the Acquisition Board

Not user accessible

Clearing or sanitizing: Not applicable, does not contain user data or settings

Power

Power consumption

400 Watts maximum

Source voltage

100 - 240 V ±10% (50 Hz to 60 Hz)

Source frequency

50 Hz to 60 Hz ±10%, at 100 - 240 V ±10%

Fuse Rating

12.5 A, 250 V_ac

Safety certification

US NRTL Listed - UL61010-1 and UL61010-2-030

Canadian Certification - CAN/CSA-C22.2 No. 61010.1 and CAN/CSA-C22.2 No 61010.2.030

EU Compliance - Low Voltage Directive 2014-35-EU and EN61010-1.

International Compliance - IEC 61010-1 and IEC61010-2-030

Pollution degree

Pollution degree 2, indoor, dry location use only

Electrical specification

Measurement CAT II (300V)

Temperature

Operating

+0 °C to +50 °C (32 °F to 122 °F)

Non-operating

MSO44, MSO46: -30 °C to +70 °C (-22 °F to 158 °F)

MSO44B, MSO46B: -20 °C to +60 °C (-4 °F to 140 °F)

Humidity

Operating

5% to 90% relative humidity (% RH) at up to +40 °C

5% to 50% RH above +40 °C up to +50 °C, noncondensing, and as limited by a maximum wet-bulb temperature of +39 °C

Non-operating

5% to 90% relative humidity (% RH) at up to +40 °C

5% to 50% RH above +40 °C up to +50 °C, noncondensing, and as limited by a maximum wet-bulb temperature of +39 °C

Altitude

Operating

Up to 3,000 meters (9,843 feet)

Non-operating

Up to 12,000 meters (39,370 feet)

Operating random vibration

MSO44B, MSO46B: 0.31 GRMS, 5‑500 Hz, 10 minutes per axis, 3 axes (30 minutes total)

Operating mechanical shock

MSO44B, MSO46B: Half-sine mechanical shocks, 40 g peak amplitude, 11 msec duration, 3 drops in each direction of each axis (18 total)

Dimensions

Height

11.299 in (286.99 mm) with feet folded in, handle to back

13.8 in (351 mm) with feet folded in, handle up

Width

15.9 in (405 mm) from handle hub to handle hub

Depth

6.1 in (155 mm) from back of feet to front of knobs, handle up

10.4 in (265 mm) feet folded in, handle to the back

Weight

MSO44, MSO46: < 16.8 lbs (7.6 kg)

MSO44B: < 16.55 lbs (7.5 kg)

MSO46B: < 16 lbs (7.3 kg)

Cooling

The clearance requirement for adequate cooling is 2.0 in (50.8 mm) on the right side of the instrument (when viewed from the front) and on the rear of the instrument

Rackmount

Unit fits into rackmount configuration (7U)

MSO44B and MSO46B Audible noise

Audible noise (fan noise) produced by the instrument at ambient temperature (=28°C): = 47 dB

Kensington lock

Instrument includes a Kensington lock