Tektronix DSA70000D, DPO70000SX, DPO70000DX, DPO70000D, DSA70000C Best Practices Manual

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DSA70000D, DPO70000D/DX/SX, MSO70000C/DX, DSA70000C, DPO70000C, and DPO7000C
ZZZ
High Performance Oscilloscopes
Best Practices Manual
*P071298904*
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DSA70000D, DPO70000D/DX/SX, MSO70000C/DX, DSA70000C, DPO70000C, and DPO7000C
ZZZ
High Performance Oscilloscopes
Best Practices Manual
www.tektronix.com
Copyright © Tektronix. All rights reserved. Licensed software products are owned by Tektronix or its subsidiaries 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 supersedes that in all previously published material. Specica tions and price change privileges reserved.
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
Contacting Tektronix
Tektronix, Inc. 14150 SW Karl Braun Drive P.O . Bo x 50 0 Beaverto USA
For product information, sales, service, and technical support:
n, OR 97077
In North America, call 1-800-833-9200. Worldwide, visit www.tektronix.com to nd 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 Series products. Additional technical, application, and ser vice information is available at the www.tektronix.com Web site.
, DPO70000C/D/DX/SX, MSO70000C/DX, and DPO7000C
Preventing electrostatic
discharge
Electrost 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 discha
1. Discharge the static voltage from your body. To do so, wear a grounded
atic discharge (ESD) is a concern when handling any electronic
rge to the instrument:
tatic wrist strap when you connect and disconnect cables and adapters.
antis 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
NOTE. A cable that is left unconnected on a bench can develop a very large static
charge that can damage the instrument.
MSO70000C/DX, DPO70000C/D/DX/SX, DSA70000C/D, DPO7000C Best Practices 1
nstrument or to the device under test (DUT). Before you attach the cable to the
i instrument, momentarily ground the center conductor of the cable, or connect a50Ω termination to one end before attaching the cable to the instrument.
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
CAUTION. Never put pressure on the center pin of the connectors. Applying
pressure to the center pin could damage the connector.
2 MSO70000C/DX, DPO70000C/D/DX/SX, DSA70000C/D, DPO7000C Best Practices
istened with isopropyl alcohol to clean the connector threads.
mo
Best practices for using high performance oscilloscopes
Input connector protection
Use 8 inch-poun
ds 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 t
he 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
e supplied connector saver to protect the instrument connector. When
Use th 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.
MSO70000C/DX, DPO70000C/D/DX/SX, DSA70000C/D, DPO7000C Best Practices 3
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.
UTION. Failure to use a backing wrench and torque wrench when making
CA
connections may dam age your instrument.
4 MSO70000C/DX, DPO70000C/D/DX/SX, DSA70000C/D, DPO7000C Best Practices
Best practices for using high performance oscilloscopes
DPO70000SX
multi-instrument trigger
connections
Signal path compensation
and inst
rument calibration
Usecarewhenma following procedure when making trigger connections:
1. Thoroughly in 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 t
of the connectors.
Signal Path Compensation (SPC) corrects for DC inaccuracies caused by temper 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.
ature variations or by long-term drift. Remove all channel input
king connections to the rear panel trigger connectors. Use the
spect each connector. Do not use connectors that display any
he connector screws to help maintain the connection and alignment
NOTE. For best accuracy, wait at least 3 hours after power on before running
SPC.
MSO70000C/DX, DPO70000C/D/DX/SX, DSA70000C/D, DPO7000C Best Practices 5
Best practices for using high performance oscilloscopes
Instrument
temperature
and clearance
DPO70000
SX
environmental conditions
Deskew
channels
Adhere to a regu Calibration Service plan is the most efcient way to ensure specied perform ance 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.
The instrument must ha ve 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).
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.
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
vertical settings, so it is important to deskew at the vertical settings at which
to the measurements will be taken or within the same amplier range. Refer to the Deskew/Attenuation Control Window topic in the Online Help of the instrument for information on the deskew and attenuation procedures.
lar schedule of calibration of the instrument. A Tektronix
erating system restore
Op
pdates to rmware and
U
applications
6 MSO70000C/DX, DPO70000C/D/DX/SX, DSA70000C/D, DPO7000C Best Practices
The instrument contains an operating system restore le on a separate partition of the hard drive. The preferred method to restore the operating system is to use the hard disk restore le. For more information, see the instrument user manual.
You should regularly check for updates to the instrument rmware and applications of your Tektronix products. Access the www.tektronix.com/software Web page and search for the model number of your i nstrument (or application) to check for updates.
Best practices for using high performance oscilloscopes
Windows applications and
hard drive maintenance
Windows shut down
procedure
g acquisitions and
Takin
measurements
The Windows ins 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 operati architecture.
The Windows instrument has specialized shut down procedures that assure the integrit
s
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 les.
Here are suggestions from Tektronix Application Engineers on the best practices to follow when you take measurements:
on of the primary oscilloscope application and its supporting software
y of the system structure and data when powering down the instrument.
trument is highly specialized to execute the oscilloscope
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 oat that can disturb the signal.
Push the Default Setup button to begin from a known state when conguring the instrument for the acquisition.
Verify that the signal is properly characterized by using the highest Horizontal Resolution possible.
Verify that the signal is m aximized 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.
MSO70000C/DX, DPO70000C/D/DX/SX, DSA70000C/D, DPO7000C Best Practices 7
Best practices for using high performance oscilloscopes
Maximum instrument input
voltage
Keep the lead le
ngths between the DUT and the instrument input connector
as short as possible.
Save relevant
waveform data les and screen shots to allow you to go back
and verify measurements.
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:
DPO700
ATI (As
TekC o scale settings and ±8 V on >1.2 V full scale settings
MSO70000DX and DPO70000DX Series
1.2 V Full S cale: ±5 V absolute maximum input
>1.2 V Full Scale: ±8.0 V. Limited by maximum V 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 V
1.0 V/Full Scale settings: <5.0 V
DPO7000 Series
1MΩ: ±150 V CAT I, derate at 20 dB/decade to 9 V
50 :5V
00SX Series
ynchronous Time-Interleaved) input: 500 mV RMS and ±0.75 V pk
nnect inputs: ±1.5 V relative to the termination bias ( 30 mA maximum) on 1.2 V full
current and the attenuator power rating
term
RMS
RMS
above 200 kHz
RMS
with peaks less than ±24 V
RMS
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.
8 MSO70000C/DX, DPO70000C/D/DX/SX, DSA70000C/D, DPO7000C Best Practices
Best pra ctic es for using probes
Best practice
ESD and probes
TriMode probes
s for using probes
For P7500 Ser (DC + peak AC).
For P7600 Se + 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) b etween 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.
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.)
Dynamic range. The differential signal ranges (with DC coupled) are as follows:
ies probes, the maximum nondestructive input voltage is: ±15 V
ries probes, the maximum nondestructive input voltage is ±8 V (DC
P7513 and P7516 P7520A P7630
±0.750 V at 5X attenuation ±0.625 V at 5X attenuation
±1.75 V at 12.5X attenuation ±1.60 V at 12.5X attenuation TA: 10 Vpp
xample operating voltage window (shown next) denes the maximum
An e 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 specication is met.
CA: 1.2 V
pp
MSO70000C/DX, DPO70000C/D/DX/SX, DSA70000C/D, DPO7000C Best Practices 9
Best practices for using probes
Offset voltage range. Offset voltage ranges are as follows:
P7600
±4 V
P7513, P7
-1.5Vto
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)
516, and P7520A
+2.5 V for Differential mode
Soldering
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
o zero volts and the input signal is zero volts (analog channel inputs shorted to
set t 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.)
To prevent damage to the c ircuit board or circuit board connec tions 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 s uc h as Kapton ta pe 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.
10 MSO70000C/DX, DPO70000C/D/DX/SX, DSA70000C/D, DPO7000C Best Practices
Best pra ctic es for using probes
Precautions when handling
probe cables
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 i
ron tip. The soldering iron temperature should be set as low as
possible, while still providing a reliable solder joint.
Use SAC305 s
older (included with the P7500 wire replacement kit) to attach
the tip wires to the DUT.
When repla
cing 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 perform ance and signal integrity, keep the lead length between the DUT and the tip as short as possible, and the lead lengths the same length.
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 am o unt 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.
MSO70000C/DX, DPO70000C/D/DX/SX, DSA70000C/D, DPO7000C Best Practices 11
Best practices for using probes
Be sure to follo
w these additional precautions when handling P7500 Series p robe
cables:
Never over-be
nd 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
d the minimum bend radius of 1 inch for either cable.
excee
Do not exceed the minimum bend radius of 2.5 inches side-to-side with a
e main cable laying at.
prob
12 MSO70000C/DX, DPO70000C/D/DX/SX, DSA70000C/D, DPO7000C Best Practices
Best pra ctic es 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
ction to SMA barrel connectors. Since the P7500 Series probes can be
in fun 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 a bout 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.
MSO70000C/DX, DPO70000C/D/DX/SX, DSA70000C/D, DPO7000C Best Practices 13
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 ne
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 h older 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 p robe head. Inspect the probe head and verify that the bullets remain seated in the probe head.
14 MSO70000C/DX, DPO70000C/D/DX/SX, DSA70000C/D, DPO7000C Best Practices
Best pra ctic es for using probes
MSO70000C/DX, DPO70000C/D/DX/SX, DSA70000C/D, DPO7000C Best Practices 15
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