Tektronix DSA70000D Series Instructions for use

xx
DSA70000D, DPO70000D/DX/SX,
MSO70000C/DX, DSA70000C,
DPO70000C, and DPO7000C
High Performance Oscilloscopes
ZZZ
Best Practices Manual
*P071298904*
071-2989-04

DSA70000D, DPO70000D/DX/SX,
MSO70000C/DX, DSA70000C,
DPO70000C, and DPO7000C
High Performance Oscilloscopes
ZZZ
Best Practices Manual
xx
www.tektronix.com
071-2989-04

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or suppliers, and are protected by national copyright laws and international treaty provisions.
Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication
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TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
Contacting Tektronix
Tektronix, Inc.
14150 SW Karl Braun Drive
P.O. Box 50 0
Beaverton, OR 97077
USA
For product information, sales, service, and technical support:
In North America, call 1-800-833-9200.
Worldwide, visit www.tektronix.com to find contacts in your area.

Best practices for using high performance oscilloscopes
Optimizing and maintaining the performance of your Tektronix product is critical
to your success. This document summarizes the Best Practices for using Tektronix
DSA70000C/D, DPO70000C/D/DX/SX, MSO70000C/DX, and DPO7000C
Series products. Additional technical, application, and service information is
available at the www.tektronix.com Web site.
Preventing electrostatic
discharge
Electrostatic discharge (ESD) is a concern when handling any electronic
equipment. Most Tektronix instruments and probes are designed with robust ESD
protection. However, large discharges of static electricity applied to the signal
inputs may damage the equipment.
CAUTION. A direct static discharge can damage the input circuitry of the
instrument. To avoid damage, follow these techniques to prevent electrostatic
discharge to the instrument:
1. Discharge the static voltage from your body. To do so, wear a grounded
antistatic wrist strap when you connect and disconnect cables and adapters.
Your instrument provides a convenient ground connection on the front panel
for this purpose.
2. Discharge the static voltage from all cables before connecting them to the
instrument or to the device under test (DUT). Before you attach the cable to the
instrument, momentarily ground the center conductor of the cable, or connect
a50Ωtermination to one end before attaching the cable to the instrument.
NOTE. A cable that is left unconnected on a bench can develop a very large static
charge that can damage the instrument.
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Best practices for using high performance oscilloscopes
Connector cleaning All connectors must be kept clean. Dirt in connectors can damage the connector
and any connectors the dirty connector is use with.
Before each use do the following:
1. Verify that the connectors are free of dirt, metal particles, scratches and
deformations.
2. Verify that the connectors are free of dirt, metal particles, scratches and
deformations.
3. With the connector pointed down, use low pressure compressed air, at an
angle to the connector, to clean the connectors.
4. If the connector still needs cleaning, use an appropriately sized swab
moistened with isopropyl alcohol to clean the connector threads.
CAUTION. Never put pressure on the center pin of the connectors. Applying
pressure to the center pin could damage the connector.
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Best practices for using high performance oscilloscopes
Input connector protection Use 8 inch-pounds of torque when making connections to a 1.85 mm connector
or to SMA connectors. Using the improper torque may degrade your signals
and damage the connectors.
Use the following procedure to make connections:
Discharge the static voltage from your body by wearing a grounded antistatic
wrist strap while connecting and disconnecting cables and adapters. The
instrument provides a front panel connection for this purpose.
Figure 1: Wear an antistatic wrist strap
Use the supplied connector saver to protect the instrument connector. When
not in use, protect against dirt and ESD damage by installing the end cap.
Alternate locations to store the ATI protective cover include the upper right
corner of the front panel and to the right of the audio connectors on the rear
panel. When installing the connector saver tighten to 8 inch-pounds.
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Best practices for using high performance oscilloscopes
Figure 2: Installing a connector saver
Use the backing wrench on the connector saver to prevent damage caused by
rotation of the connectors when installing a connector.
Use the supplied torque wrench to tighten (8 inch-pounds) your cable
connector to the connector saver.
CAUTION. Failure to use a backing wrench and torque wrench when making
connections may damage your instrument.
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Best practices for using high performance oscilloscopes
DPO70000SX
multi-instrument trigger
connections
Usecarewhenma
king connections to the rear panel trigger connectors. Use the
following procedure when making trigger connections:
1. Thoroughly inspect each connector. Do not use connectors that display any
damage.
CAUTION. Do not use a damaged connector. Using a damaged connector with
a good connector will damage the good connector.
2. Carefully align the cable connector with the connector on the instrument.
3. Insert the cable connector straight into the instrument connector.
4. Tighten the connector screws to help maintain the connection and alignment
of the connectors.
Signal path compensation
and instrument calibration
Signal Path Compensation (SPC) corrects for DC inaccuracies caused by
temperature variations or by long-term drift. Remove all channel input
connections and run the SPC routine occasionally or whenever the ambient
temperature of the instrument has changed by more than 5 °C (9 °F) to assure that
acquisitions are made with a high degree of accuracy.
NOTE. For best accuracy, wait at least 3 hours after power on before running
SPC.
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Best practices for using high performance oscilloscopes
Adhere to a regular schedule of calibration of the instrument. A Tektronix
Calibration Service plan is the most efficient way to ensure specified performance
over the lifetime of your Tektronix instrument. The service plan also guarantees
continuous compliance with international quality and traceability standards.
Contact your Tektronix Representative or refer to the www.tektronix.com Web
site for instrument calibration services.
Instrument temperature
and clearance
The instrument must have 3 inches of clearance on both the left and right sides for
proper ventilation. The air temperature around the instrument must be between
+5 °C and +45 °C (+41 °F and +113 °F).
DPO70000SX
environmental conditions
For measurements impacted by sub-picosecond skew, leave the instrument
powered on for at least 6 hours to allow the instrument to stabilize to environmental
conditions before running SPC, deskew, or taking precision measurements.
Deskew channels Use the Deskew/Attenuation control window to compensate for propagation
delays of different length probes and to set the input/output ratio of any external
attenuation or gain between the signal and input channels. Deskew relates directly
to the vertical settings, so it is important to deskew at the vertical settings at which
measurements will be taken or within the same amplifier range. Refer to the
Deskew/Attenuation Control Window topic in the Online Help of the instrument
for information on the deskew and attenuation procedures.
Operating system restore The instrument contains an operating system restore file on a separate partition of
the hard drive. The preferred method to restore the operating system is to use the
hard disk restore file. For more information, see the instrument user manual.
Updates to firmware and
applications
You should regularly check for updates to the instrument firmware and
applications of your Tektronix products. Access the www.tektronix.com/software
Web page and search for the model number of your instrument (or application) to
check for updates.
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Best practices for using high performance oscilloscopes
Windows applications and
hard drive maintenance
The Windows instrument is highly specialized to execute the oscilloscope
application that is its primary function. It also provides the capability to run other
Windows compatible applications in the Windows Desktop. Some 3rd Party
applications (not from Tektronix) are included with the Windows instrument for
your convenience. Caution should be taken when adding new 3rd Party programs
to the Windows instrument so that the 3rd Party program will not interfere with
the operation of the primary oscilloscope application and its supporting software
architecture.
Windows shut down
procedures
The Windows instrument has specialized shut down procedures that assure the
integrity of the system structure and data when powering down the instrument.
Use the Shutdown command in the File menu of the oscilloscope, or the Shut
DowncommandintheStartmenuwhenpoweringdowntheinstrument. Avoid
abrupt shutdowns caused by pushing the On/Standby button for 5 seconds or
by removing the power cable.
Allow the instrument to complete its Start-up routine before shutting down the
oscilloscope. Do not power off the instrument before the Windows system is fully
loaded and running, as this action will harm the Windows System files.
Taking acquisitions and
measurements
Here are suggestions from Tektronix Application Engineers on the best practices
to follow when you take measurements:
Make sure that the cables are capable of the bandwidth that is being measured.
Torque the 1.85 mm and SMA connectors to 8 in-lbs for proper power
measurements.
Tighten the screw on high bandwidth probes and on the TCA-292 to avoid
connector float that can disturb the signal.
Push the Default Setup button to begin from a known state when configuring
the instrument for the acquisition.
Verify that the signal is properly characterized by using the highest Horizontal
Resolution possible.
Verify that the signal is maximized from the bottom of the screen to the top
of the screen.
Use the Fine adjustment with the Vertical controls to get the best resolution.
Use a constant sample rate if the acquisition must be at the full sample rate
as the time base is adjusted.
Check the surrounding environment of the instrument for interfering signal
sources.
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Best practices for using high performance oscilloscopes
Keep the lead lengths between the DUT and the instrument input connector
as short as possible.
Save relevant waveform data files and screen shots to allow you to go back
and verify measurements.
Maximum instrument input
voltage
WARNING. Observe all terminal ratings. To avoid damaging the instrument,
observe all rating and markings on the product. Consult the product manual for
further ratings information before making connections to the product.
Do not apply a potential to any terminal, including the common terminal, that
exceeds the maximum rating of that terminal.
The maximum instrument input voltages are as follows:
DPO70000SX Series
ATI (Asynchronous Time-Interleaved) input: 500 mV RMS and ±0.75 V pk
TekConnect inputs: ±1.5 V relative to the termination bias (30 mA maximum) on ≤1.2 V full
scale settings and ±8 V on >1.2 V full scale settings
MSO70000DX and DPO70000DX Series
≤1.2 V Full Scale: ±5 V absolute maximum input
>1.2 V Full Scale: ±8.0 V. Limited by maximum Vterm current and the attenuator power rating
at maximum temperature
DSA70000D and DPO70000D Series
±600 mV centered on the offset voltage (±4.6 V maximum)
±1.5 V relative to the termination bias (30 mA maximum)
MSO70000C, DPO70000C, and DSA70000C Series
<1.0 V/Full Scale settings: <1 VRMS
≥1.0 V/Full Scale settings: <5.0 VRMS
DPO7000 Series
1MΩ: ±150 V CAT I, derate at 20 dB/decade to 9 VRMS above 200 kHz
50 Ω:5V
RMS with peaks less than ±24 V
NOTE. When using probes on the measurement inputs, do not exceed the
instrument or probe ratings. Refer to the user manual for additional information
available on the www.tektronix.com/manuals Web page.
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Best practices for using probes
Best practices for using probes
For P7500 Series probes, the maximum nondestructive input voltage is: ±15 V
(DC + peak AC).
For P7600 Series probes, the maximum nondestructive input voltage is ±8 V (DC
+ peak AC), with tip adapter.
CAUTION. To avoid damage to the probe inputs, do not apply more than maximum
nondestructive input voltage (DC + peak AC) between each input, or between
either probe input and ground.
Refer to the probe user or instruction manual for additional information available
on the www.tektronix.com/manuals Web page.
ESD and probes To avoid ESD damage to the probe, always use an antistatic wrist strap and
work at a static-approved workstation when you handle the probe. (See page 1,
Preventing electrostatic discharge.)
TriMode probes Dynamic range. The differential signal ranges (with DC coupled) are as follows:
P7513 and P7516 P7520A P7630
±0.750 V at 5X attenuation ±0.625 V at 5X attenuation CA: 1.2 Vpp
±1.75 V at 12.5X attenuation ±1.60 V at 12.5X attenuation TA: 10 Vpp
An example operating voltage window (shown next) defines the maximum
voltage that you can apply to each input, with respect to earth ground, without
saturating the probe input circuitry. A common-mode voltage that exceeds the
operating voltage window may produce an erroneous output waveform, even
when the differential-mode specification is met.
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Best practices for using probes
Offset voltage range. Offset voltage ranges are as follows:
P7600
±4 V
P7513, P7516, and P7520A
-1.5Vto+2.5 V for Differential mode
P7513, P7516
-2.0 V to +4.0 V for Single-Ended and Common mode (ground referenced)
P7520A
-1.8 V to +3.4 V for Single-Ended and Common mode (ground referenced)
The Offset Voltage Control, accessible from the attached instrument, allows the
probe dynamic range to be effectively moved up and down within the limits of the
offset voltage range and the operating voltage window. When the offset voltage is
set to zero volts and the input signal is zero volts (analog channel inputs shorted to
ground, not open), the displayed signal should be zero volts. If a noticeable zero
volt offset is present under the above conditions, a Probe Cal operation should be
performed. (See your probe user manual.)
Soldering To prevent damage to the circuit board or circuit board connections due to
accidental movement of the probe and soldered leads, we recommend that you
secure the tip to the circuit board using the adhesive tip tape provided in your
accessory kit. You can also use other materials such as Kapton tape or hot glue.
To avoid damage to the tip or to the circuit under test, avoid applying excessive
heat from the soldering iron. Use a low wattage, temperature-controlled soldering
iron and appropriately sized soldering iron tip.
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Best practices for using probes
Youneedtofoll
ow these precautions when you solder the tips:
For best soldering results, use a microscope to examine the quality of the
solder joints.
Use a low-wattage, temperature-controlled soldering iron and a small-mass
soldering iron tip. The soldering iron temperature should be set as low as
possible, while still providing a reliable solder joint.
Use SAC305 solder (included with the P7500 wire replacement kit) to attach
the tip wires to the DUT.
When replacing tip wires or axial-lead resistors, use solder wick to remove
the excess solder from the probe tip circuit board via holes. Be careful not to
overheat the via and damage the board.
The attachment wires should be bent symmetrically to vary the interconnect
spacing. Use care when you solder a tip to a DUT to avoid inadvertently
desoldering either the attachment wires or the damping resistor.
For best performance and signal integrity, keep the lead length between the
DUT and the tip as short as possible, and the lead lengths the same length.
Precautions when handling
probe cables
Tektronix P7600, P6700, P7300, and P7500 Series probes are quality measurement
tools and should be treated with care to avoid damage or performance degradation
due to mishandling.
Be sure to follow these precautions when handling any probe cables:
Do not excessively pull or twist the probe cables when positioning the probe
for measurements.
Never crush the cable, as might occur when you run over the probe with a
chair wheel or drop something heavy on the cable.
To maximize probe life, limit the amount of cable twist relative to the probe
control box to ±180 degrees. Always uncoil a probe cable gently before
applying the twisting forces needed to orient the probe head for connection
to the probe tip.
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Best practices for using probes
Be sure to follow these additional precautions when handling P7500 Series probe
cables:
Never over-bend the probe main or tip cables, which can put a permanent
kink into the cable. When storing the probe, do not coil it too tightly. It is best
to use the protective foam carrying case which is designed to not exceed the
minimum bend radius of 2.5 inches.
Be sure to follow these additional precautions when handling P6700 Series probe
cables:
Never over-bend the probe main or tip cables, which can put a permanent
kink into the cable. When storing the probe, do not coil it too tightly. Do not
exceed the minimum bend radius of 1 inch for either cable.
Do not exceed the minimum bend radius of 2.5 inches side-to-side with a
probe main cable laying flat.
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Best practices for using probes
Maintenance of P7500
probes
The input to the probe body, the part of the probe that connects to the various tips,
was designed with replaceable G3PO RF bullets. These RF bullets are similar
in function to SMA barrel connectors. Since the P7500 Series probes can be
used with multiple interchangeable tips, there is the possibility of wearing out or
damaging the input connector. To address this issue, replace the RF bullets.
The bullet contacts in the probe body should be replaced every 200 insertion
cycles. For medium use situations, this should be about once a year.
Remove bullets. To remove the bullets, use the removal tool (Tektronix part
number: 003-1896-00) and follow these steps:
1. Squeeze the tool plunger to extend the holder tangs.
2. Insert the removal tool into the probe body so that the holder tangs surround
one of the bullets.
3. Release the plunger to secure the holder tangs on the bullet.
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Best practices for using probes
4. Gently pull the tool outward to remove the bullet.
5. Repeat for the other bullet.
CAUTION. If you cannot extract the bullets with the bullet removal tool, use fine
needle-nosed pliers and a magnifying glass or microscope. Be careful not to
damage the probe body with the pliers.
Install bullets. When both bullets have been removed, install new bullets. To do
so, follow these steps:
1. Squeeze the tool plunger to extend the holder tangs.
2. Insert a new bullet into the tool so that the holder tangs surround the bullet.
3. Release the plunger to secure the holder tangs on the bullet.
4. Insert the tool into the probe body and seat the bullet in the recess.
5. Squeeze the tool plunger to release the bullet.
6. Gently pull the tool out of the probe body.
7. Repeat for the other bullet.
8. Test that the bullets are installed correctly by connecting and then removing
an accessory solder tip to the probe head. Inspect the probe head and verify
that the bullets remain seated in the probe head.
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Best practices for using probes
MSO70000C/DX, DPO70000C/D/DX/SX, DSA70000C/D, DPO7000C Best Practices 15