Use proper power cord.

Use only the power cord specified for this product and certified for the country of use. Do not use the provided power cord for other products.

Use proper voltage setting

Before applying power, make sure that the line selector is in the proper position for the source being used.

Ground the product.

This product is grounded through the grounding conductor of the power cord. To avoid electric shock, the grounding conductor must be connected to earth ground. Before making connections to the input or output terminals of the product, ensure that the product is properly grounded. Do not disable the power cord grounding connection.

Power disconnect.

The power cord disconnects the product from the power source. See instructions for the location. Do not position the equipment so that it is difficult to operate the power cord; it must remain accessible to the user at all times to allow for quick disconnection if needed.

Connect and disconnect properly.

Do not connect or disconnect probes or test leads while they are connected to a voltage source.

Use only insulated voltage probes, test leads, and adapters supplied with the product, or indicated by Tektronix to be suitable for the product.

Connect the probe output to the measurement instrument before connecting the probe to the circuit under test. Connect the probe reference lead to the circuit under test before connecting the probe input. Disconnect the probe input and the probe reference lead from the circuit under test before disconnecting the probe from the measurement instrument.

Observe all terminal ratings.

To avoid fire or shock hazard, observe all rating and markings on the product. Consult the product manual for further ratings information before making connections to the product.

Do not exceed the Measurement Category (CAT) rating and voltage or current rating of the lowest rated individual component of a product, probe, or accessory. Use caution when using 1:1 test leads because the probe tip voltage is directly transmitted to the product.

Do not apply a potential to any terminal, including the common terminal, that exceeds the maximum rating of that terminal.

Do not float the common terminal above the rated voltage for that terminal.

Do not connect a current probe to any wire that carries voltages above the current probe voltage rating.

Do not operate without covers

Do not operate this product with covers or panels removed, or with the case open. Hazardous voltage exposure is possible.

Avoid exposed circuitry

Do not touch exposed connections and components when power is present.

Do not operate with suspected failures.

If you suspect that there is damage to this product, have it inspected by qualified service personnel.

Disable the product if it is damaged. Do not use the product if it is damaged or operates incorrectly. If in doubt about safety of the product, turn it off and disconnect the power cord. Clearly mark the product to prevent its further operation.

Before use, inspect voltage probes, test leads, and accessories for mechanical damage and replace when damaged. Do not use probes or test leads if they are damaged, if there is exposed metal, or if a wear indicator shows.

Examine the exterior of the product before you use it. Look for cracks or missing pieces.

Use only specified replacement parts.

Replace batteries properly

Replace batteries only with the specified type and rating.

Recharge batteries for the recommended charge cycle only.

Wear eye protection

Wear eye protection if exposure to high-intensity rays or laser radiation exists.

Do not operate in wet/damp conditions

Be aware that condensation may occur if a unit is moved from a cold to a warm environment.

Do not operate in an explosive atmosphere

Keep product surfaces clean and dry

Remove the input signals before you clean the product.

Provide proper ventilation.

Refer to the installation instructions in the manual for details on installing the product so it has proper ventilation.

Slots and openings are provided for ventilation and should never be covered or otherwise obstructed. Do not push objects into any of the openings.

Provide a safe working environment

Always place the product in a location convenient for viewing the display and indicators.

Avoid improper or prolonged use of keyboards, pointers, and button pads. Improper or prolonged keyboard or pointer use may result in serious injury.

Be sure your work area meets applicable ergonomic standards. Consult with an ergonomics professional to avoid stress injuries.

Use care when lifting and carrying the product. This product is provided with a handle or handles for lifting and carrying.

WARNING:The product is heavy. To reduce the risk of personal injury or damage to the device get help when lifting or carrying the product.

Use only the Tektronix rackmount hardware specified for this product.

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.

Connect and disconnect properly.

Connect the probe output to the measurement product before connecting the probe to the circuit under test. Connect the probe reference lead to the circuit under test before connecting the probe input. Disconnect the probe input and the probe reference lead from the circuit under test before disconnecting the probe from the measurement product.

De-energize the circuit under test before connecting or disconnecting the current probe.

Connect the probe reference lead to earth ground only.

Do not connect a current probe to any wire that carries voltages or frequencies above the current probe voltage rating.

Inspect the probe and accessories

Before each use, inspect probe and accessories for damage (cuts, tears, or defects in the probe body, accessories, or cable jacket). Do not use if damaged.

Ground-referenced oscilloscope use

Do not float the reference lead of this probe when using with ground-referenced oscilloscopes. The reference lead must be connected to earth potential (0 V).

Floating measurement use

Do not float the reference lead of this probe above the rated float voltage.

To avoid electric shock

Do not touch exposed connections.

Do not service alone

Do not perform internal service or adjustments of this product unless another person capable of rendering first aid and resuscitation is present.

Disconnect power

To avoid electric shock, switch off the product power and disconnect the power cord from the mains power before removing any covers or panels, or opening the case for servicing.

Use care when servicing with power on

Dangerous voltages or currents may exist in this product. Disconnect power, remove battery (if applicable), and disconnect test leads before removing protective panels, soldering, or replacing components.

Verify safety after repair

Always recheck ground continuity and mains dielectric strength after performing a repair.

Analog DC

Maximum offset ranges,

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

Volts/div Setting	Maximum offset range, 50 Ω Input
1 mV/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

Input Signal cannot exceed max input voltage for the 50 Ω input path.

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 + 0.05 * 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| + 0.1 div)

DC voltage measurement accuracy, Sample acquisition mode, typical

Measurement Type	DC Accuracy (In Volts)
Any Sample	±(DC Gain Accuracy * |reading - (offset - position)| + Offset Accuracy + 0.15 div + 0.6 mV)
Delta volts between any two samples acquired with the same scope setup and ambient conditions	±(DC Gain Accuracy * |reading| + 0.15 div +1.2 mV)

✓ Offset accuracy

50 Ω DC-coupled

≥5 mV/div: ± (0.005 X |offset – position| + 0.087 div)

2 mV/div: ± (0.005 X |offset – position| + 0.13 div)

1 mV/div: ± (0.005 X |offset – position| + 0.224 div)

1 MΩ DC-coupled

≥5 mV/div: ± (0.005 X |offset – position| + 0.2 div)

2 mV/div: ± (0.005 X |offset – position| + 0.237 div)

1 mV/div: ± (0.005 X |offset – position| + 0.384 div)

Offset and position in units of Volts

Position range

±5 divisions

✓ DC gain accuracy

50 Ω

±2.0% at >2 mV/div (±2.0% at 2 mV/div, ±4.0% at 1 mV/div, typical). Immediately following SPC, add 2% for every 5 °C change in ambient.

±1.0% of full scale at >2 mV/div, (±1.0% of full scale at 2 mV/div, ± 2.0% at 1 mV/div, typical). Immediately following SPC, add 1% for every 5 °C change in ambient.

1 MΩ

±2.0% at >2 mV/div (±2.0% at 2 mV/div, ±2.5% at 1 mV/div and 500 μV/div, typical). Immediately following SPC, add 2% for every 5 °C change in ambient.

±1.0% of full scale at >2 mV/div, (±1.0% of full scale at 2 mV/div, ±1.25% at 1 mV/div and 500 μV/div, typical). Immediately following SPC, add 1% for every 5 °C change in ambient.

✓ Digital nonlinearity, typical

INL @ > 2 mV/div: ±16 DL's (12-bit reference)

INL @ ≤ 2 mV/div: ±20 DL's (12-bit reference)

DNL: ±1.0 DL's (12-bit digitizing scale) when oscilloscope is in Hi-Res mode.

Analog AC

✓ Analog bandwidth 50 Ω DC coupled

Model	Volts/div Setting	Bandwidth
MSO6XB BW-10000	1 mV/div – 1V/div	DC - 10GHz
MSO6XB BW-8000	1 mV/div – 1V/div	DC – 8 GHz
MSO6XB BW-6000	1 mV/div – 1V/div	DC – 6 GHz
MSO6XB BW-4000	1 mV/div – 1V/div	DC – 4 GHz
MSO6XB BW-2500	1 mV/div – 1V/div	DC – 2.5 GHz
MSO6XB BW-1000	1 mV/div – 1V/div	DC – 1 GHz

✓ Analog Bandwidth, 1 MΩ

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.

MSO6XB, all models:

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

Analog bandwidth TPP1000 10X probe

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.

Model	Volts/Div Setting	Bandwidth
MSO6X, all models	5 mV/div - 100 V/div	DC - 1 GHz

Bandwidth selections

10 GHz model, 50 Ω:

20 MHz, 200 MHz, 250 MHz, 350 MHz, 500 MHz, 1 GHz, 2 GHz, 2.5 GHz, 3 GHz, 4 GHz, 5 GHz, 6 GHz, 7 GHz, 8GHz, 9GHz, and 10 GHz.

8 GHz model, 50 Ω

20 MHz, 200 MHz, 250 MHz, 350 MHz, 500 MHz, 1 GHz, 2 GHz, 2.5 GHz, 3 GHz,4 GHz, 5 GHz, 6 GHz, 7 GHz, and 8 GHz.

6 GHz model, 50 Ω

20 MHz, 200 MHz, 250 MHz, 350 MHz, 500 MHz, 1 GHz, 2 GHz, 2.5 GHz, 3 GHz,4 GHz, 5 GHz, and 6 GHz

4 GHz model, 50 Ω

20 MHz, 200 MHz, 250 MHz, 350 MHz, 500 MHz, 1 GHz, 2 GHz, 2.5 GHz, 3 GHz, and 4 GHz

2.5 GHz model, 50 Ω

20 MHz, 200 MHz, 250 MHz, 350 MHz, 500 MHz, 1 GHz, 2 GHz, and 2.5 GHz

1 GHz model, 50 Ω

20 MHz, 200 MHz, 250 MHz, 350 MHz, 500 MHz, and 1 GHz

1 MΩ

20 MHz (HW), 200 MHz, 250 MHz (HW), 350 MHz, and Full (500 MHz)

Frequency response tolerance/flatness, 50 Ω

± 0.5 dB from DC to 80% of rated bandwidth up to 8 GHz instruments

± 0.5 dB from DC To 65% of rated bandwidth for 10 GHz instruments

Combined TDP7700 and 6 Series B MSO flatness, typical

±0.6 dB from DC to 80% of nominal BW when used with P77C292MM (SMA Probe Tip)

Not valid while using peak detect or envelope mode. Valid for probe modes A, B, and D

Phase accuracy

±2.5 degrees, typical out to 9 GHz

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

50 Ω, DC-coupled

250 MHz, ± 5%

1 MΩ, DC-coupled

250 MHz, ± 25%

Upper frequency limit, 20 MHz bandwidth limited, typical

50 Ω, DC-coupled

20 MHz, ± 5%

1 MΩ, DC-coupled

20 MHz, ± 25%

Calculated rise time

The formula used is 0.4/BW where BW is the measured –3 dB bandwidth of the oscilloscope. The formula accounts for the rise time contribution of the oscilloscope independent of the rise time of the signal source.

Calculated Rise Time (10% to 90%)

Below specification is independent of oscilloscope model and is dependent on bandwidth option only.

Model	50 Ω	TPP1000 Probe
	1 mV-1 V	5 mV-10 V
MSO6X BW-10000	40 ps	400 ps
MSO6X BW-8000	50 ps	400 ps
MSO6X BW-6000	66.67 ps	400 ps
MSO6X BW-4000	100 ps	400 ps
MSO6X BW-2500	160 ps	400 ps
MSO6X BW-1000	400 ps	400 ps

Effective bits (ENOB), typical

These limits apply to all channels

Random Noise

Random Noise (Typical)

50 GS sample mode and 25 GS hires mode not available in Fastacq

✓ High offset AC RMS Noise

50 Ω

Table 1. 25 GS/s, Sample Mode, RMS

V/div		1 mV/div	2 mV/div	5 mV/div	10 mV/div	20 mV/div	50 mV/div	100 mV/div	1 V/div
8 GHz		223 μV	224 μV	293 μV	482 μV	890 μV	2.1 mV	4.88 mV	42 mV
7 GHz		199 μV	202 μV	271 μV	440 μV	793 μV	1.85 mV	4.4 mV	37 mV
6 GHz		179 μV	180 μV	233 μV	388 μV	691 μV	1.67 mV	3.83 mV	33.4 mV

Table 2. 12.5 GS/s, HiRes Mode, RMS

V/div		1 mV/div	2 mV/div	5 mV/div	10 mV/div	20 mV/div	50 mV/div	100 mV/div	1 V/div
5 GHz		162 μV	164 μV	210 μV	330 μV	595 μV	1.4 mV	3.38 mV	28.1 mV
4 GHz		138 μV	139 μV	175 μV	271 μV	486 μV	1.15 mV	2.71 mV	23.1 mV
3 GHz		117 μV	119 μV	149 μV	226 μV	475 μV	975 μV	2.28 mV	21.4 mV
2 GHz		96.3 μV	97.6 μV	118 μV	212 μV	450 μV	920 μV	2.10 mV	21.0 mV
1 GHz		77.3 μV	72.4 μV	110 μV	190 μV	425 μV	900 μV	1.78 mV	19.2 mV
500 MHz		56 μV	56.2 μV	100 μV	182 μV	400 μV	840 μV	1.74 mV	16.8 mV
350 MHz		47.7 μV	47.3 μV	92.0 μV	165 μV	385 μV	770 μV	1.70 mV	16.1 mV
250 MHz		46.1 μV	46.7 μV	90.0 μV	145 μV	325 μV	675 μV	1.50 mV	15.8 mV
200 MHz		37.9 μV	38.0 μV	80.0 μV	120 μV	320 μV	660 μV	1.45 mV	15.2 mV
20 MHz		25.0 μV	25.0 μV	75.0 μV	115 μV	310 μV	560 μV	1.40 mV	13.0 mV

1 MΩ falls under the random noise specification at high offset levels.

Overdrive recovery time

500 ns pulse width

50 Ω	400% Overdrive			2000% Overdrive
Vertical scale	5%	1%	0.2%	5%	1%	0.2%
2 mV / div	< 50 ns	50 ns	300 ns	—	—	—
10 mV / div	< 50 ns	50 ns	300 ns	50 ns	50 ns	400 ns
0.1 V / div	< 50 ns	50 ns	300 ns	—	—	—

100 µs pulse width

50 Ω	400% Overdrive			2000% Overdrive
Vertical scale	5%	1%	0.2%	5%	1%	0.2%
2 mV / div	< 50 ns	50 ns	1 us	—	—	—
10 mV / div	< 50 ns	50 ns	1 µs	<50 ns	50 ns	150 us
0.1 V / div	< 50 ns	50 ns	1 us	—	—	—

TPP1000 Probe

Vertical scale	500% Overdrive			5000% Overdrive
	5%	1%	0.2%	5%	1%	0.2%
10 mV / div	20 µs	2.0 ms	2.0 ms	30 µs	50 µs	2.2 ms
20 mV / div	14 µs	2.0 ms	2.0 ms	30 µs	50 µs	110 µs
50 mV / div	12 µs	60 µs	2.0 ms	---	---	---
0.1 V / div	12 µs	60 µs	2.0 ms	---	---	---

Crosstalk (Channel Isolation) - 50 Ohm

≥50 dB up to 2 GHz

≥45 dB up to 5 GHz

≥40 dB up to 10 GHz

With channels set to 200 mV/div

SFDR analog channels

SFDR analog channels, typical

A single input tone at -1 dBFS is swept from 10 MHz to bandwidth and the largest error spur is recorded.

RF front-end

Two-tone third intercept point, typical

+25 dBm <6 GHz

+20 dBm 6 GHz to 8 GHz

12 dBm 8 GHz to 10 GHz

SFDR, typical

-60 dBc for a 1 GHz input in a 5 GHz span with a 3 GHz CF

-70 dBc at 2.35 GHz, 1.5 GHz span

EVM (256 QAM), typical

0.4% rms at 20 M Symbols/s

1.1% rms at 800 M Symbols/s

1.5% rms at 1.2 G Symbols/s

1.6% rms at 2 G Symbols/s

DANL

-163 dBm/Hz 10 MHz to 6 GHz, 1 mV/div

-160 dBm/Hz >6 GHz to 10 GHz, 1 mV/div

Harmonic Distortion

2^nd harmonic distortion at -58 dBc with a 0 dBm 1 GHz signal.

3^rd harmonic distortion at -55 dBc with a 0 dBm 1 GHz signal.

Sensitivity/Noise Density, typical

-157 dBm/Hz (1 mV/div, -38 dBm, 1.0001 GHz CF, 500 kHz span, 3 kHz RBW)

Phase noise at 1 GHz, typical

-118 dBc/Hz 10 kHz offset

-119 dBc/Hz 100 kHz offset

-132 dBc/Hz 1 MHz offset

-140 dBc/Hz 10 MHz offset

Absolute amplitude accuracy, typical

±1 dB (0-8 GHz) for max 10 GHz BW.

Noise figure, typical

1 mv/div, 11 dB 10 MHz to 6 GHz and 14 dB 6 GHz to 10 GHz

SNR/Dynamic Range, typical

112 dB with a 1 GHz signal in a 100 MHz span with 1 kHz RBW ± 20 MHz from the carrier.

Skew and delay

Digital skew, typical

Digital-to-Analog skew

1 ns

Digital-to-Digital skew

± 320 ps from bit 0 of any TekVPI + channel to bit 0 of any TekVPI+ channel.

Digital skew within a FlexChannel

< 200 ps within any TEKVPI + channel

Delay between analog channels, full bandwidth, typical

≤ 10 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 and resolution

-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).

Acquisition Modes

Sample, Peak Detect, High Res, Envelope, Average, Fast Frame

Number of digitized bits

	Sample Rate	Acquisition Mode	Digitized Bits	Channel Bandwidth
MSO64B channels 1 and 3 (2 and 4 off) MSO66B channels 1 and 4 (2, 3, 5, and 6 off) MSO68B channels 1 and 5 (2, 3, 4, 6, 7, and 8 off)	50 GS/s	Sample	8	10 GHz
	25 GS/s	Hi Res	12	5 GHz
	12.5 GS/s	Hi Res	12	5 GHz
	6.25 GS/s	Hi Res	13	2.5 GHz
	3.125 GS/s	Hi Res	14	1 GHz
	1.5625 GS/s	Hi Res	15	500 MHz
	625 MS/s	Hi Res	16	200 MHz
MSO64B all channels MSO66B channels 1, 2, 4, and 5 (3 and 6 off) MSO68B channels 1, 2, 5, and 6 (3, 4, 7, and 8 off)	25 GS/s	Sample	8	10 GHz
	12.5 GS/s	Sample	12	10 GHz
	12.5 GS/s	Hi Res	12	5 GHz
	6.25 GS/s	Hi Res	13	2.5 GHz
	3.125 GS/s	Hi Res	14	1 GHz
	1.5625 GS/s	Hi Res	15	500 MHz
	625 MS/s	Hi Res	16	200 MHz
MSO66B all channels MSO68B all channels	12.5 GS/s	Sample	8	5 GHz
	6.25 GS/s	Sample	12	5 GHz
	3.125 GS/s	Hi Res	13	1 GHz
	1.5625 GS/s	Hi Res	14	500 MHz
	1.25 GS/s	Hi Res	15	500 MHz
	312.5 MS/s	Hi Res	16	100 MHz

Peak Detect or Envelope Mode Minimum Detectable Pulse, typical

Channels	Sample Rate	Minimum Pulse Width
MSO64B channels 1 and 3 (2 and 4 off) MSO66B channels 1 and 4 (2, 3, 5, and 6 off) MSO68B channels 1 and 5 (2,3, 4, 6, 7, and 8 off)	50 GS/s	160 ps
MSO64B channels 2 and 4 MSO66B channels 2 and 5 (3 and 6 off) MSO68B channels 2 and 6 (3, 4, 7 and 8 off)	25 GS/s	160 ps
MSO66B channels 3 and 6 MSO68B channels 3, 4, 7, and 8	12.5 GS/s	320 ps

Number of waveforms for average acquisition mode

2 to 10,240 Waveforms, default 16 waveforms

TekVPI interface

TekVPI interconnect

All analog channel inputs on the front panel conform to the TekVPI+ specification defined in the TEKPROBE, TEKCONNECT, AND TEKVPI STANDARDS specification.

Total Probe Power

80 W maximum

MSO64B

40 W maximum for channels 1 through 2 and 40 W maximum for channels 3 through 4.

MSO66B

40 W maximum for channels 1 through 3 and 40 W maximum for channels 4 through 6.

​​​​​​​MSO68B

40 W maximum for channels 1 through 4 and 40 W maximum for channels 5 through 8.

Probe Power per Channel

5 V Supply: 300 mW (60 mA max)

12 V Supply: 20 W (1.67 A max)

Low-C Passive Probe Support

Supports TPP1000 and similar probes

Digital Probe Support

Supports TLP058 VPI+ digital probes

Probe User Interface

Probe setup menu

Probe menu button support (opens probe setup menu)

Probe warning messages and indicators

Dynamic range indication

Probe bandwidth limiting

Sample rate

Sample rate range

Channels	Sample rate (real time)	Sample rate (interpolated)
2 channels	6.25 S/s to 50 GS/s	100 GS/s to 2.5 TS/s
4 channels	6.25 S/s to 25 GS/s	50 GS/s to 2.5 TS/s
8 channels	6.25 S/s to 12.5 GS/s	25 GS/s to 2.5 TS/s

On 4-channel models, the 2 channels with 50 GS/s capability are 1 and 3 (channels 2 and 4 must be off).

On 6-channel models, the2 channels with 50 GS/s capability are 1 and 4 (channels 2, 3, 5, and 6 must be off).

On 8-channel models, the 2 channels with 50 GS/s capability are 1 and 5 (channels 2, 3, 4, 6, 7, and 8 must be off).

On 6-channel models, the 4 channels with 25 GS/s capability are 1,2, 4 and 5 (channels 3 and 6 must be off).

On 8-channel models, the 4 channels with 25 GS/s capability are 1, 2, 5, and 6 (channels 3, 4, 7, and 8 must be off).

High Res sample rate

Channels	Sample rate
2 channels	up to 25 GS/s
4 channels	up to 12.5 GS/s
8 channels	up to 6.25 GS/s

On 4-channel models, the 2 channels with 25 GS/s capability are 1 and 3 (channels 2 and 4 must be off).

On 6-channel models, the 2 channels with 25 GS/s capability are 1 and 4 (channels 2, 3, 5, and 6 must be off).

On 8-channel models, the 2 channels with 25 GS/s capability are 1 and 5 (channels 2, 3, 4, 6, 7, and 8 must be off).

On 6-channel models, the 4 channels with 12.5 GS/s capability are 1, 2, 4, and 5 (channels 3 and 6 must be off).

On 8-channel models, the 4 channels with 12.5 GS/s capability are 1, 2, 5 and 6 (channels 3, 4, 7, and 8 must be off).

Interpolated waveform rate (Sample mode):

• 2.5 TS/s

• 1 TS/s

• 500 GS/s

• 250 GS/s

• 100 GS/s

• 50 GS/s (only with a 25 GS/s or12.5 GS/s channel on)

• 25 GS/s (only with a 12.5 GS/s channel on)

Interpolated waveform rate (High Res mode):

• 2.5 TS/s

• 1 TS/s

• 500 GS/s

• 250 GS/s

• 100 GS/s

• 50 GS/s

• 25 GS/s (only with a 25 GS/s or12.5 GS/s channel on)

• 12.5 GS/sec (only with a 12.5 GS/s channel on)

Record length range

Applies to analog and digital channels. All acquisition modes are 1 G maximum record length, down to 1 k minimum record length, adjustable in 1 sample increments.

Standard: 62.5 Mpoints

Option 6-RL-1: 125 Mpoints

Option 6-RL-2: 250 Mpoints

Option 6-RL-3: 500 Mpoints

Option 6-RL-4: 1 Gpoints

Horizontal scale range

40 ps/div to 1000 s/div

The minimum horizontal scale is determined by the record length by dividing the record length by 10 (because there are 10 divisions on-screen) and then dividing by the maximum sample rate (2.5 TS/s).

40 ps/div can only be achieved with a 2.5 TS/s sample rate (maximum) and a 1000 point record length (minimum).

The table below shows minimum horizontal scales for a collection of record lengths.

Record length	Minimum Horizontal Scale
1 kS	40 ps/div
10 kS	400 ps/div
100 kS	4 ns/div
1 MS	40 ns/div
10 MS	400 ns/div
62.5 MS	2.5 us/div
125 MS with optional memory length	5 us/div
250 MS with optional memory length	10 us/div
500 MS with optional memory length	20 us/div
1 GS with optional memory length	40 us/div

1000 s/div is the maximum horizontal scale which limits the acquisition length to 10000 s (2 hours, 46 minutes and 40 seconds).

Below a record length of 62.5 kS, the horizontal scale is further limited. The maximum horizontal scale can be calculated by dividing the record length by 10 (because there are 10 division on-screen) and then dividing by the minimum sample rate (6.25 S/s).

The table below shows maximum horizontal scales for a collection of record length.

Record length	Maximum Horizontal Scale
1 kS	16 s/div
5 kS	80 s/div
10 kS	160 s/div
25 kS	400 s/div
50 kS	800 s/div
62.5 kS	1000 s/div

Sample jitter (Aperture uncertainty), typical

Time duration	Typical jitter
<1 μs	80 fs
<1 ms	130 fs

Delta-time measurement accuracy, typical

Delta-time measurement accuracy, typical

Formula for DTA:

SR₁ = Slew Rate (1^st Edge) around 1^st point in measurement

SR₂ = Slew Rate (2^nd Edge) around 2^nd point in measurement

N = RSS of input-referred noise (volts rms) and Dynamic noise estimate (volts rms).

Dynamic noise estimate*

Note:Dynamic noise is noise that appears with a signal applied (such as distortion or interleave errors).

t_j = aperture uncertainty (sec rms—80fs for short durations)

TBA = timebase accuracy or reference frequency error (which is 20ppb)

t_p = delta-time measurement duration (sec)

Delta Time Measurement Accuracy (DTA), reference example

These limits apply to:

• MSO64B: Channels 1 and 3
• MSO66B: Channels 1 and 4
• MSO68B: Channels 1 and 5 are the only ones used

Volts/div	BW	Sample rate	Sample mode	Frequency	Amplitude pk-pk	DTA TYP
50 mV	10 GHz	50 GHz	Sample	5.65 GHz	400 mV	327.78 fs
50 mV	8 GHz	50 GHz	Sample	4.52 GHz	400 mV	346.08 fs
50 mV	6 GHz	50 GHz	Sample	3.39 GHz	400 mV	383.01 fs
50 mV	5 GHz	25 GHz	Hi-Res	2.825 GHz	400 mV	387.37 fs
50 mV	4 GHz	25 GHz	Hi-Res	2.26 GHz	400 mV	424.08 fs
50 mV	2.5 GHz	25 GHz	Hi-Res	1.4125 GHz	400 mV	512.12 fs
50 mV	2 GHz	25 GHz	Hi-Res	1.13 GHz	400 mV	569.94 fs
50 mV	1 GHz	25 GHz	Hi-Res	565 MHz	400 mV	802.6 fs
5 mV	10 GHz	50 GHz	Sample	5.65 GHz	40 mV	486.58 fs
5 mV	8 GHz	50 GHz	Sample	4.52 GHz	40 mV	514.54 fs
5 mV	6 GHz	50 GHz	Sample	3.39 GHz	40 mV	561 fs
5 mV	5 GHz	25 GHz	Hi-Res	2.825 GHz	40 mV	583.91 fs
5 mV	4 GHz	25 GHz	Hi-Res	2.26 GHz	40 mV	637.27 fs
5 mV	2.5 GHz	25 GHz	Hi-Res	1.4125 GHz	40 mV	791.51 fs
5 mV	2 GHz	25 GHz	Hi-Res	1.13 GHz	40 mV	889.92 fs
5 mV	1 GHz	25 GHz	Hi-Res	565 MHz	40 mV	1.29 ps

These limits apply to:

• MSO64B: All channels
• MSO66B: Channels 1, 2, 4, and 5
• MSO68B: Channels 1, 2, 5, and 6 are the only ones used

Volts/div	BW	Sample rate	Sample mode	Frequency	Amplitude pk-pk	DTA TYP
50 mV	10 GHz	25 GHz	Sample	5.65 GHz	400 mV	397.32 fs
50 mV	8 GHz	25 GHz	Sample	4.52 GHz	400 mV	417.47 fs
50 mV	6 GHz	25 GHz	Sample	3.39 GHz	400 mV	448.57 fs
50 mV	5 GHz	12.5 GHz	Hi-Res	2.825 GHz	400 mV	460.86 fs
50 mV	4 GHz	12.5 GHz	Hi-Res	2.26 GHz	400 mV	483.23 fs
50 mV	2.5 GHz	12.5 GHz	Hi-Res	1.4125 GHz	400 mV	581.18 fs
50 mV	2 GHz	12.5 GHz	Hi-Res	1.13 GHz	400 mV	636.8 fs
50 mV	1 GHz	12.5 GHz	Hi-Res	565 MHz	400 mV	904.88 fs
5 mV	10 GHz	25 GHz	Sample	5.65 GHz	40 mV	555.49 fs
5 mV	8 GHz	25 GHz	Sample	4.52 GHz	40 mV	551.87 fs
5 mV	6 GHz	25 GHz	Sample	3.39 GHz	40 mV	589.36 fs
5 mV	5 GHz	12.5 GHz	Hi-Res	2.825 GHz	40 mV	637.71 fs
5 mV	4 GHz	12.5 GHz	Hi-Res	2.26 GHz	40 mV	668.87 fs
5 mV	2.5 GHz	12.5 GHz	Hi-Res	1.4125 GHz	40 mV	814.74 fs
5 mV	2 GHz	12.5 GHz	Hi-Res	1.13 GHz	40 mV	907.3 fs
5 mV	1 GHz	12.5 GHz	Hi-Res	565 MHz	40 mV	1.36 ps

These limits apply to:

• MSO66B: All channels
• MSO68B: All channels are used

Volts/div	BW	Sample rate	Sample mode	Frequency	Amplitude pk-pk	DTA TYP
50 mV	5 GHz	12.5 GHz	Sample	2.825 GHz	400 mV	536.22 fs
50 mV	4 GHz	12.5 GHz	Sample	2.26 GHz	400 mV	580.12 fs
50 mV	2.5 GHz	6.25 GHz	Hi-Res	1.4125 GHz	400 mV	620.41 fs
50 mV	2 GHz	6.25 GHz	Hi-Res	1.13 GHz	400 mV	690.69 fs
50 mV	1 GHz	6.25 GHz	Hi-Res	565 MHz	400 mV	934.61 fs
5 mV	5 GHz	12.5 GHz	Sample	2.825 GHz	40 mV	698.23 fs
5 mV	4 GHz	12.5 GHz	Sample	2.26 GHz	40 mV	761.47 fs
5 mV	2.5 GHz	6.25 GHz	Hi-Res	1.4125 GHz	40 mV	864.09 fs
5 mV	2 GHz	6.25 GHz	Hi-Res	1.13 GHz	40 mV	971.89 fs
5 mV	1 GHz	6.25 GHz	Hi-Res	565 MHz	40 mV	1.4 ps

Probe compensator

Output Voltage and Frequency

Output Voltage Amplitude: 2.5 V ±2% (nominally 0-2.5 V)

Output Frequency: 1 kHz ±25%

Output Source Impedance is nominally 1 kΩ

Auxiliary output, Trigger out, or Reference clock out

AUX OUT Connector and Functional Modes

A single BNC connector.

Acquisition Trigger Out, Reference Clock Out, and AFG Trigger Out.

AUX OUT Output Voltage

Voltage thresholds are listed in the following table:

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

AUX OUT Acquisition Trigger Jitter

Acquisition Trigger Out Jitter: < 50 ps standard deviation

AUX OUT Acquisition Trigger Polarity

A leading edge, which is user selectable transition from HIGH to LOW or from LOW to HIGH, marks the trigger event.

The pulse width is approximately 100 ns.

AUX OUT Reference Clock

Reference clock output can be referenced from either the internal clock reference or the external clock reference.

AUX OUT AFG Trigger

The output frequency is dependent the frequency of the AFG signal using the table below:

AFG Signal Frequency	AFG 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

External reference input

BNC interface

External reference input

Nominal input frequency

10 MHz

User must select either 10 MHz external (±1 kppm), 10 MHz external (±1ppm), or the internal reference (default) from the UI.

Frequency Variation Tolerance

Low Phase Noise Mode: 9.99999 MHz to 10.00001 MHz (±1 _ppm)

Tracking Mode: 9.99 MHz to 10.01 MHz (± 1000_ppm)*

Loop Bandwidth of external tracking mode is a function of the PLL loop maximum slew rate capability, and is not linear. The modulation deviation frequency (±Hz) is dependent upon the maximum modulation rate (Hz). For example, a deviation of ±50 Hz or less can tolerate any modulation rate. A deviation of the maximum amount specified for this mode (±10 kHz or 1 kppm) will tolerate up to 80 Hz of modulation rate. A deviation of ±500Hz will tolerate up to about 1240 Hz of modulation rate. This is based on a measured instrument response to the reference clock being modulated. Example measurement is in the below table.

Deviation (+/-Hz)	Modulation Rate (Hz)	Notes
10000	80
5000	190
2500	320
1000	760
500	1240
250	1720
100	2150
50		Won't lose lock at 50Hz and below

Sensitivity, typical

Vin is 200 mV_p-p up to 7 V_p-p, using an external 50 Ω termination on the input BNC.

Maximum input signal

7 V_pp

Impedance

745 Ω ± 20% with 18 pf ± 20% to ground at 10 MHz

AUX IN trigger input impedance

Interface

SMA

Input Impedance

50 Ω

Maximum Input Voltage

5 V_RMS

Trigger Skew

Trigger skew variation improves for pulse input voltages ≥1 V_p-p.

When sample rate is ≥25 GS/s and no channels with a maximum sample rate of 12.5 GS/s (channels 3 or 6 on an MSO66B, or channels 3, 4, 7, or 8 on MSO68B) are used: 200 ps ±200 ps

When sample rate is 12.5 GS/s and at least one channel with a maximum sample rate of 12.5 GS/s (channels 3 or 6 on an MSO66B, or channels 3, 4, 7, or 8 on MSO68B) is used: 7.87 ns ±200 ps

Trigger Jitter

Trigger Jitter ≤ 40 ps RMS for Sample Mode and Edge-Type Trigger

Trigger Jitter ≤ 40 ps RMS for Edge-Type Trigger and FastAcq Mode

Front panel knob

Multipurpose Knob A, Multipurpose Knob B, Trigger Level, Vertical Position, Vertical Scale, Horizontal Position, Horizontal Scale, Wave Inspector (two-tier knob)

Front Panel Buttons

Run/Stop, Single/Seq, Cursors, Fast Acq, High Res, Clear, Force Trigger, Trigger Slope, Trigger Mode, Vertical Input Selection (one for each analog input), Reference Waveform, Math Waveform, Bus Waveform, Zoom, Navigate Previous, Navigate Next,Touchscreen Off, Default Setup (recessed), Save, Autoset (recessed)

Waveform Save Options

Analog Waveforms can be saved as: Reference Waveforms, .wfm files, .csv files, .h5 files, .mat files

Digital Waveforms can be saved as: Reference Waveforms, .wfm files, .csv files

Math Waveforms can be saved as: .wfm files, .csv files

Waveform Recall Options

Analog Waveforms can be recalled to reference waveforms from: .wfm files, .csv files, .bin (keysight format) files, .trc (LeCroy format) files, .h5 files

Digital Waveforms can be recalled to reference waveforms from: .wfm files, .csvfiles

Math Waveforms can be recalled to reference waveforms from: .wfm files, .csv files

Reference files can be imported from .tr0 binary files.

Dimensions

Requirements that follow are nominal and unboxed:

Unit fits into rackmount configuration (7U)

Height

371 mm (14.6 in) feet folded in, handle folded up

309 mm (12.2in) feet folded in, handle folded to the backside of the instrument

Width

454 mm (17.9 in) from handle hub to handle hub

Depth

205 mm (8.0 in) from back of feet to front of knobs

297.2 mm (11.7in) feet folded in, handle folded to the backside of the instrument

Clearance Requirements

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

Audible Noise

Audible noise (fan noise) produced by the instrument at ambient temperature (≤28°C): ≤ 45dB

Kensington Lock

Oscilloscope includes a Kensington Lock.