Instructions
P6561A
200 MHz SMD Probe
070-8529-02
Copyright T ektronix, Inc. All rights reserved.
T ektronix products are covered by U.S. and foreign patents, issued and
pending. Information in this publication supercedes that in all previously
published material. Specifications and price change privileges reserved.
Printed in the U.S.A.
T ektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000
TEKTRONIX, TEK, KlipChip, and SureFoot are registered trademarks of
T ektronix, Inc.
WARRANTY
Tektronix warrants that the products that it manufactures and sells will be free from defects
in materials and workmanship for a period of one (1) year from the date of shipment. If a
product proves defective during this warranty period, Tektronix, at its option, either will
repair the defective product without charge for parts and labor, or will provide a
replacement in exchange for the defective product.
In order to obtain service under this warranty, Customer must notify Tektronix of the
defect before the expiration of the warranty period and make suitable arrangements for the
performance of service. Customer shall be responsible for packaging and shipping the
defective product to the service center designated by Tektronix, with shipping charges
prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to
a location within the country in which the Tektronix service center is located. Customer
shall be responsible for paying all shipping charges, duties, taxes, and any other charges for
products returned to any other locations.
This warranty shall not apply to any defect, failure or damage caused by improper use or
improper or inadequate maintenance and care. Tektronix shall not be obligated to furnish
service under this warranty a) to repair damage resulting from attempts by personnel other
than Tektronix representatives to install, repair or service the product; b) to repair damage
resulting from improper use or connection to incompatible equipment; c) to repair any
damage or malfunction caused by the use of non-Tektronix supplies; or d) to service a
product that has been modified or integrated with other products when the effect of such
modification or integration increases the time or difficulty of servicing the product.
THIS WARRANTY IS GIVEN BY TEKTRONIX IN LIEU OF ANY OTHER
WARRANTIES, EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS
DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX’ RESPONSIBILITY
TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND
EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF
THIS WARRANTY. TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE
FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR
HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.
Getting Started
The P6561A is a miniature, 200 MHz, 10X-attenuating passive probe
that is compatible with the TAS 485. It may also be used with
general purpose oscilloscopes having a 1 MW input impedance with
an input capacitance of 20 pF.
The P6561A is provided with several accessories designed to make
probing and measurement a simpler task. Please take a moment to
familiarize yourself with these accessories and their uses.
Figure 1 shows the probe and identifies various parts that are referred
to in these instructions.
Probe Head
Boot
Metal Sleeve
Figure 1: The P6561A Probe
General Safety Summary
Observe Maximum Working Voltage
Do not use the P6561A above 42 VDC.
Do Not Operate in an Explosive Atmosphere
T o avoid personal injury or fire hazard, do not operate this product in
an explosive atmosphere.
Do Not Immerse in Liquids
Clean the probe using a damp cloth. Refer to the cleaning instructions on page 8.
BNC Shell,
Locking Ring
Readout Pin
Probe Compensation Box
1
P6561A Instructions
Accessories and Operation
Ground lead with socket — Use the ground
lead to set a ground reference for your measurements. The ground lead socket (0.025 inch) can
be connected to the KlipChip test clip, directly
to a square-pin ground on a circuit board, or to
the right-angle square pin adapter.
Ground Lead
Push-In
Probe Tip
KlipChip
Ground Lead
To attach the ground lead with socket to the
probe, gently slide the probe boot back to expose
the metal sleeve. Then, slide the ground lead’s
metal ring over the probe tip onto the probe’s
metal sleeve. Push the boot back over the metal
sleeve and the metal ring. Align the boot slot to fit
over the contact of the ground lead.
Push-in probe tip — Use the push-in probe tip
when you are probing circuits by hand. The tip
presses into the socket in the probe head.
To attach the push-in probe tip, seat the tip into
the probe head and push the tip in until it is
seated; do not force the tip. To remove the tip,
gently grab the tip with small pliers and pull the tip
out.
KlipChip — Use a KlipChip test clip to access
fragile, dense circuitry. To connect a KlipChip,
insert the probe socket into its body.
You can connect a second KlipChip to the ground
lead with socket. To attach the ground lead, insert
the ground lead socket into the KlipChip body.
The KlipChip body freely turns, allowing better
probe orientation. To reduce stress and provide a
lower profile on components being tested, the
flexible sleeve of the KlipChip bends up to a 35
degree angle.
P6561A Instructions
2
Accessories and Operation
Right Angle
Adapter
Signal-Ground
Lead
Right-angle adapter — Use the right-angle
adapter to probe boards with 0.025-inch diameter
square pins; for example, on micro-computer and
communications backplanes.
Signal-Ground lead — Use the signal-ground
lead to substantially reduce ground lead
inductance. Because the ground lead simply
touches the ground reference (instead of clipping
onto it), you can easily move the probe to different
points on the device under test.
Signal-Ground
Lead Ring
To attach the signal-ground lead, gently slide the
boot back to expose the probe’s metal sleeve.
Slide the metal ring of the signal-ground lead over
the probe tip onto the probe’s metal sleeve. Push
the boot back up to cover both the metal sleeve
and metal ring.
SureFoot — The SureFoot tip is an integral
probe tip and miniature guide that enables
fault-free probing of fine-pitch SMD packages.
The accessory kit includes SureFoot tips in three
different sizes.
Short Ground blade — Use the short ground
blade with a SureFoot tip for probing ease and
improved signal fidelity. To use it, form a ground
plane of copper clad on the top of the IC to be
probed. Attach short jumper wires from the
device ground to the copper clad. With the
SureFoot tip installed, rest the short ground blade
on the ground plane while probing the IC.
Installing SureFoot — Install the short ground
blade using the same method as the signalground lead. Press a SureFoot tip into the probe
head in place of the standard push-in tip.
3
P6561A Instructions
Accessories and Operation
Readout Pin
4I Ground Lead with KlipChip
4I Ground Lead
Readout Pin — The BNC connector on the
probe compensation box includes a spring-loaded
pin that connects to a mating contact ring on
certain oscilloscopes. These oscilloscopes
recognize the attenuation factor of the probe and
automatically correct the oscilloscope indication of
scale factor.
You can see if your oscilloscope supports this
feature by watching the oscilloscope vertical scale
factor readout when attaching the probe. If the
displayed scale changes by a factor of 10—for
instance, from 10 mV to 100mV—your oscilloscope supports this feature.
Adjustment tool — Use the insulated adjust-
ment tool to adjust the low- and high-frequency
adjustments in the probe compensation box.
Ground Lead Length — To maintain the best
signal quality, use the shortest possible ground
lead and signal input path.
Signal-Ground Lead
P6561A Instructions
4
Maintenance
Refer to this section for information about servicing and maintaining
the P6561A probe.
Low-Frequency Probe Compensation
Probe low-frequency (LF) compensation may need adjustment after
moving the probe from one oscilloscope to another. Check the
low-frequency compensation before making critical rise time or
amplitude measurements.
1. Connect the P6561A to the oscilloscope.
2. Remove all accessories from the P6561A probe and attach the
push-in probe tip. Make sure the boot covers the probe’s metal
sleeve.
3. Connect the probe tip to a calibration signal. Most oscilloscopes
have a front-panel test point for this purpose; if yours does not,
use a signal generator that produces a well-formed square wave at
approximately 1 kHz.
4. Adjust the oscilloscope so that it displays two to five cycles.
5. Using the adjustment tool, adjust LF in the probe until you see a
flat-top square wave on the display. See figure 2.
1 kHz
LF
Figure 2: P6561A Low-Frequency Adjustment
5
P6561A Instructions
High-Frequency Probe Compensation
The probe high-frequency compensation should seldom require
adjustment; however, your probe may require high-frequency
adjustment if any of the following are true:
H the probe has high-frequency aberrations
H the probe doesn’t perform at the rated bandwidth
H the oscilloscope input capacitance is near the limits of the probe
compensation range in T able 1 on page 10.
T o perform the high-frequency compensation adjustment you will
need a signal source that has all of the following characteristics (see
figure 3):
H a square-wave output at 1 MHz
H a fast rise output with rise time less than 1 ns
Maintenance
tr<1 ns
>1 vpp
Figure 3: High-Frequency Compensation Signal
P6561A Instructions
1 MHZ
90%
10%
6
Maintenance
1. Remove the top plastic cover from the compensation box. (T o
2. Connect the P6561A to the oscilloscope.
3. On the calibration generator, change the pulse period to 1 ms
4. Connect the probe tip to the calibration signal.
5. Adjust the oscilloscope to view the first 60 ns of the waveform.
6. Alternately adjust HF1, HF2, and HF3 for overall flatness.
7. Adjust HF4 for the squarest waveform.
remove the cover, gently insert a tool, such as a small flat-blade
screwdriver, under one side of the cover and carefully pry up and
out.)
(1 MHz).
See figure 4.
(These adjustments interact.)
7
P6561A Instructions
HF4
Maintenance
HF1
HF2
HF3
LFHF4
(b) Location of Adjustments
HF1
HF2
HF3
3ns 10ns 20ns 40ns
Figure 4: P6561A High-Frequency Compensation
Cleaning
T o prevent damage to probe materials, avoid using chemicals that
contain benzene, toluene, xylene, acetone, or similar solvents.
Remove loose dust from the probe exterior using a soft cloth or small
brush. Remaining dirt may be removed with a soft cloth dampened
with a mild detergent and water solution or isopropyl alcohol. Do not
immerse the probe in liquids or use abrasive cleaners.
P6561A Instructions
(a) Area Of Waveform Affected By Adjustments
8
Maintenance
Replacing the Probe Cable
Use the following procedure to disassemble the probe to replace the
cable assembly. Refer to Figure 5.
1. Using a small flat-blade screwdriver, remove the top and bottom
plastic covers on the compensation box. (T o remove a cover,
insert the tool into the side of the box, under the cover edge; pry
gently upward and outward.)
2. Using an adjustable or 1/2” (13 mm) wrench, loosen the
compensation box cable retaining nut and slide it back.
3. Lightly grasp the cable strain relief and pull the cable out of the
compensation box.
4. Slide the cable retaining nut off of the old cable and onto the new
one.
5. Push the new cable connector into the compensation box and
press it into place.
6. Using the wrench, gently tighten the cable retaining nut into
place until it is snug.
Metal Compensation Box
BNC Shell,
Locking Ring
Cable Retaining Nut
Cable Assembly
Figure 5: Probe Disassembly
9
P6561A Instructions
Specifications
Table 1: Electrical Characteristics
System bandwidth (–3 dB) 200 MHz
Attenuation (system) 10X
Rise time (system) 1.85 ns (typical)
Input resistance (system)
Input capacitance 11.0 pF (typical)
Compensation range 15 pF to 35 pF (typical)
Maximum nondestructive input voltage 42 V (See Figure 7)
Uniform Signal Delay ±150 ps
Table 2: Mechanical and Environmental Characteristics
10 MW at DC
(See Figure 6)
Net Weight
(including accessories)
Probe Cable Length 1.3 m (approximately 4.27 ft.)
Temperature Range
Operating 0°C to +50°C
Nonoperating –55°C to +75°C
Humidity
Operating
Nonoperating
<113 g (4.0 oz)
(+32°F to +122°F)
(–67°F to +167°F)
90% relative humidity
<50° C
<60° C
P6561A Instructions
10
Specifications
10 M
1M
100 k
10 k
1k
100
10
100 Hz 1 kHz 10 kHz 100 kHz 1 MHz 10 MHz 100MHz 1 GHz
Figure 6: Typical Input Impedance / Phase
50V
0°
–10°
–20°
–30°
–40°
–50°
–60°
–70°
–80°
–90°
40V
30V
20V
10V
0
100 Hz 1 kHz 10 kHz 100kHz 1 MHz 10MHz 100 MHz 1 GHz
Figure 7: Derating Curve for Determining Maximum Input Voltage (DC + Peak AC)
11
P6561A Instructions
Replaceable Parts
1
2
3
Figure 8: P6561A Replaceable Parts
P6561A Instructions
567891011
4
12
Replaceable Parts
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––––––––––– 1 P6561A,SMD PROBE:200 MHZ 10X
8–
STANDARD ACCESSORIES
ACCESSORY KIT: 80009 020199300
020–1993–00 1
–1 206–0417–10 1 PROBE HEAD ASSY:WITH CABLE,1.3M 80009 206041710
–2 ––––––––––– 1 .SCREWDRIVER:ADJUSTMENT TOOL,METAL TIP
.STR,0.095 ID X 215 L
–3 ––––––––––– 2 .TIP,PROBE:MICROCKT TEST,0.05 CTR
–4 ––––––––––– 1 .LEAD,ELECTRICAL:28 AWG,4.0 L
–5 ––––––––––– 1 .CONTACT,ELEC:SIGNAL–GROUND LEAD;FEMALE,
(For pkg of 12, order SF503)
–6 ––––––––––– 9349 1 .CONN,CONT ACT:SLDR,SIGNAL–GND LEAD
–7 ––––––––––– 1 .ADAPTER,PROBE:0.050 HOUSING (50 MIL JEDEC)
(For pkg of 12, order SF502)
(For pkg of 12, order SF501)
070–8529–02 1 MANUAL,TECH:INSTRUCTIONS,P6561A 80009 070852902
–8 ––––––––––– 1 .ADAPTER,PROBE:0.025 HOUSING (25 MIL JEDEC)
–9 ––––––––––– 1 .ADAPTER,PROBE:0.0196 HOUSING (0.5 MM EIAJ)
–10 ––––––––––– 2 .PROBE,TIP:0.260 L,DUAL TIP,0.120 L
–11 ––––––––––– 2 .SPRING,ADAPTER:RIGHT ANGLE,0.025 SQ PIN
13 P6561A Instructions
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