3M ScanEM-QC CTK019 User manual

3M™ ScanEM-QC
Electromagnetic
Near-Field Probe Kit
Model CTK019
User’s Guide

2
Table of Contents
Contents of the kit ..........................................................................................3
Product description ........................................................................................4
3M™ ScanEM-QC Electromagnetic Near-Field Probe Kit
controls and connector ..................................................................................6
Using ScanEM-QC Probe ................................................................................7
Basics of operation ....................................................................................................7
Stand-alone operation ...............................................................................................8
Quick set-up ..............................................................................................................8
Setting the level dial...................................................................................................9
Sound on/off ............................................................................................................10
EM level LED bar ......................................................................................................10
Operation as a probe ....................................................................................11
Basics ......................................................................................................................11
Amplified near-field probes for a spectrum analyzer ................................................12
Non-contact oscilloscope probes .............................................................................12
Broadband field strength probe for a multimeter .....................................................14
Examples of applications of ScanEM-QC probes ......................................................15
Analyzing the results ....................................................................................21
Troubleshooting ............................................................................................23
Common places to look for excessive emissions .....................................................23
During the design phase ..........................................................................................24
Checking the prototype ............................................................................................24
Before the EMC test .................................................................................................24
Should things go wrong ...........................................................................................24
Seeking help ............................................................................................................24
EMC101 ........................................................................................................25
Why EMC? ...............................................................................................................25
Near-field primer .....................................................................................................25
The validity of the near-field measurements ............................................................26
ESD Primer ...................................................................................................27
Taking care of your ScanEM-QC probes ......................................................28
Changing batteries ...................................................................................................28
What if: ....................................................................................................................29
Specifications ...............................................................................................31

3
The 3M™ ScanEM-QC Electromagnetic Near-Field Probe Kit will help
improve your EM compliance and ESD Audit and Survey process and will
be a valuable addition to your bench and field tool collection.
ÎThe ScanEM-QC Kit is designed for product-level EMC pre-compliance and
diagnostics, as well as for ESD Audit. For EMC board-level diagnostics use
ScanEM-C Kit model CTK015—please visit www.3m.com/static
Scan EM-QC Contents
The ScanEM-QC Kit, model CTK019 consists of:
One ScanEM-EQC probe (electric field), model CTM034
One ScanEM-HQC probe (magnetic field), model CTM036
One six foot (~1.8 m) SMB- to BNC- cable, model AWD001
AAA batteries (two per probe—already installed)
Plastic storage box, model CTA119
User’s Guide
Optional ScanEM-QC Kit accesories:
Accessories Pack, model CTA101
Includes:
• One additional six foot SMB- to BNC-
cable, model AWD001
• One BNC- to N- adapter, model JBA001
• One BNC- to Banana Plug Adapter,
model JBA002

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Product Description
The 3M™ ScanEM-QC Electromagnetic Near-Field Probes detect the
presence of an electromagnetic field and indicate its relative strength. The
probes are most effective in the near field (close to the radiating object).
The 3M™ ScanEM-EQC Probe detects the radiated electric component of
the electromagnetic field and the 3M™ ScanEM-HQC Probe reacts to the
magnetic conductive emission propagated over the cables.
What is EMC
ÎIf you are new to the world of electromagnetic compliance, please refer to a
brief primer on page 25 of this User’s Guide.
What about ESD?
ÎFor a brief primer on ESD Audit using electromagnetic field tools, please see
page 27 of this User’s Guide.
The ScanEM-QC Kit offers a universal solution to electromagnetic
compliance problems. By themselves, the ScanEM-QC Probes are
completely self-contained EM field detectors. When connected to test
equipment, the ScanEM-QC Probes become broadband amplified near-field
probes.
In stand-alone mode, the ScanEM-QC Probes indicate the presence and
relative strength of an electromagnetic field by two means: audio indication
and an LED level bar. The more LEDs that are on and the higher the
pitch of the sound, the stronger the electromagnetic field is at the point of
measurement. In stand-alone mode, the ScanEM-QC Probe doesn’t provide
absolute levels. It serves only to single out the areas with relatively high
emissions.

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The 3M™ ScanEM-QC Electromagnetic Near-Field Probe provides both AC
and DC outputs. The ScanEM-QC Probes serve as: broadband amplified
probes for a spectrum analyzer, as non-contact high-bandwidth voltage
(3M™ ScanEM-EQC Probe) and current (3M™ ScanEM-HQC Probes) probes
for an oscilloscope and as broadband field strength probes for a multimeter.
The ScanEM-QC Electromagnetic Near-Field Probes can:
Provide means of testing each and every product you ship to a customer
for compliance with emission regulations
Predict radiated EMC test results
Pre-test your product prior to an official compliance test in order to
identify potential problems early
Quickly troubleshoot a product that has failed a compliance test
Find EM leakage on enclosures, cables and connectors
Find sources of EM interference
Show the presence of a high-frequency signal on a cable or wire
without contact
Observe ESD Events both in the air and in the cables and ground planes
using oscilloscope
Work as amplified near-field probes when connected to a
spectrum analyzer
Work as non-contact high-bandwidth voltage and current
oscilloscope probes
Work as field-strength probes when used with a multimeter

6
3M™ ScanEM-QC Electromagnetic
Near-Field Probe Kit Controls
and Connector
Antenna Level Dial Sound Switch LED Level Bar Output
This is the
ScanEM-QC’s
antenna.
Adjusts the
reference level
of the EM field.
Turns sound
indicator On
and Off.
Indicates
relative EM field
strength.
Provides AC and
DC output.
Stand-alone operation only
Point it at the
area or the
object you
want to check.
The closer the
antenna is to
the object, the
more accurate
the test result.
The level dial
is used to set
the “normal
background
level.” It also
works as a
squelch control.
The stronger
the emission
level, the higher
the pitch of
the sound.
Five LEDs
indicate relative
field strength.
The LEDs can
be used with or
without sound.
SMB male
connector.
Connects
ScanEM-QC
Probe to a
spectrum
analyzer,
oscilloscope,
frequency
counter,
multimeter
and other
instruments
0
1
2
Level Sound On
Press to Operate
Output
EM Level
ScanEM-HQC
Conducted Emission Probe
R
Operate Buutton
Keep this button
depressed when
you are using
your ScanEM-QC
Probe.
ScanEM-QC
Probe is “ON”
as long as
this button is
held down.
Two AAA alkaline batteries are already installed in each
ScanEM-QC Probe. See page 28 for instructions on
how to replace the batteries.

7
Using the 3M™ ScanEM-QC
Electromagnetic Near-Field
Probe Kit
Basics of Operation
Both ScanEM-QC Probes come with the batteries installed and are ready to
work right out of the box.
The best way to hold the ScanEM-QC Probe is in the palm of your right
hand, just as you would hold a pen, with your thumb on the red Operate
button and with your index finger above the Level dial and Sound On switch
(see illustration on page 6). The red Operate button turns on the power. The
ScanEM-QC Probe will be “on” as long as the button is held down.
The 3M™ ScanEM-EQC Probe is a non-contact probe. Do not touch circuit
elements with the ScanEM-EQC Probes’s antenna. The test results may be
meaningless, and normal operation of the measured device may be influenced
by parasitic capacitance introduced by the ScanEM-EQC Probe in direct
contact. The ScanEM-EQC Probe itself may be damaged as well if it is
directly exposed to high voltage. The 3M™ ScanEM-HQC Probe, however, is
designed to be put in direct contact with the insulation of the cable.
For the best results, position the ScanEM-QC Probe perpendicular to the
tested area. This way, stray electromagnetic emissions coming from the
outside of the measured area do not affect the ScanEM-QC Probe’s antenna
as much, and the ScanEM -QC Probe can pinpoint the source of the troubling
emissions with greater accuracy.
The ScanEM-QC needs a few seconds to “warm-up”
ÎBefore scanning or taking measurements, allow a few seconds for the ScanEM-
QC Probe to stabilize after first turning it on.

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3M™ ScanEM-EQC Probe
The tip at the end of the ScanEM-EQC Probe is its antenna. Point it at the
suspected area and keep it close to the measured spot without making contact.
3M™ ScanEM-HQC Probe
Hold the ScanEM-HQC Probe in such a way that the cable that you are testing
fits into the groove of the ScanEM-HQC Probe’s antenna.
Stand-Alone Operation
In the stand-alone mode the ScanEM-QC Probe is completely self-sufficient
and requires nothing else to operate.
Quick Set-Up
Hold the ScanEM-QC Probe in the palm of your right hand as if you were
holding a pen
Set the Sound switch in the desired position (if in doubt, set it to On).
Press the red Operate button with your thumb and hold it down.
Point the ScanEM-QC Probe’s antenna away from the tested product.
With your index finger, adjust the Level dial so only the green LED is On.
Position the ScanEM-QC Probe perpendicular to the tested area and bring
its antenna as close as possible without actually touching the tested product.
With ScanEM-HQC Probe, set the cable into the groove of its antenna.
Move the ScanEM-EQC Probe around the tested product or area or along the
cable (ScanEM-HQC Probe) and observe changes in sound and LED output.
The closer the ScanEM-EQC Probe’s antenna is to the tested area, the greater
its spatial resolution. A scan performed an inch or two away from the product
can direct you to the general area where high emissions are generated, but the
precise location of the source can be found only when the antenna is in close
proximity to the product.

9
Setting the Level Dial
The Level dial sets the reference level for field strength measurements. The
sensitivity of the 3M™ ScanEM-HQC Electromagnetic Near-Field Probe stays the
same regardless of the position of the Level dial (Figure A). If you let go of the
Operate button and then press it again, you will not need to readjust the level.
Set the Level dial so that when the antenna is pointed away from the tested
device, only the green LED is “On” (the pitch of the sound will be at the low
end of its range). If the tested product is “noisy” as far as the EM level is
concerned, the LED bar may be totally lit most of the time and the pitch may
be constantly high. In this case, point the ScanEM-QC Probe at an area of
expected “average” emission on the tested product, and adjust the Level dial
to the new background level.
You can use the Level dial to put the 3M™ ScanEM-QC Probe in squelch
mode. Follow the procedure outlined in the previous paragraph, only set the
reference level just below the point where the green LED turns on. This way
your ScanEM-QC Probe will be quiet and the lights will be off until you pass
it over an area where the EM level is higher than your reference setting. When
testing a product for compliance, for example, you may want to scan some
other product that has passed the emission test before, and set the background
level of the ScanEM-QC Probe to the average emission level of that product.
Then scan the product you are trying to
get agency approval for to look for areas
with higher emission levels.
Setting the Level dial to 0 completely
disables the ScanEM-QC’s Probe own
indication and is used for its operation as
a probe only. Use Level settings of 1 and
above in stand-alone operation. Figure A: 3M™ ScanEM-QC Probe Reaction

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Level Dial Numbers
ÎThe numbers from zero to nine on the Level dial do not refer to any specific
field strength, nor signify a preset spacing in field strength between any two
numbers. These numbers are put there for convenience only so that the user
can refer to them when recording relative field strength. You can use these
numbers to “calibrate” your 3M™ ScanEM -QC Electromagnetic Near-Field
Probes. Once the correlation between the field strength at the tip of the ScanEM
-QC Probe, the number on the dial, and the status of the LED bar is established,
it can be used for simple Go/No Go tests.
Sound On/Off
The human ear is very sensitive to pitch variation and thus can detect the
slightest change in field strength when the speaker is on.
With the Sound turned on, you can detect much finer variations in EM field
strength than by using lights as the only indicator. You may prefer to have
the sound turned off to cut down on noise, but this limits your resolution to
just five steps (five LEDs).
EM Level LED Bar
The EM level LED bar is for relative estimates only
and shouldn’t be used for precise measurements.
The ScanEM-QC Probe’s LEDs are spaced on a
somewhat linear scale. The figures on the right show
typical LED scales. The scale is always relative to
the green LED. On this scale, green LED is always
a reference point or “0 mV/m,” regardless of where
the Level dial is set. Be careful not to mistake the
situation when the LED bar is overloaded with the
second red LED just turned On.
Figure B provided for reference only. Specifications
are subject to change without notice.
Figure B: Typical 3M™
ScanEM-QC Probe LED
Response
5
4
3
2
1
5
4
3
2
1
Scan EM-EQC
LEDLED
Scan EM-HQC
Current m.A
Current m.A
0 0.5 1 1.5 2
0 0.2 0.4 0.6 0.8 1 1.2 1.4

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Operation as a Probe
Basics
The 3M™ ScanEM-QC Electromagnetic Near-Field Probe provides AC and
DC outputs to virtually any piece of test equipment: spectrum analyzer,
oscilloscope, frequency counter or multimeter. Output is provided via an
SMB connector and the supplied cable. For some types of test equipment
you may need to use additional adaptors (typically, BNC-to-N or BNC-to-
banana plugs). Such adaptors are widely available.
The DC voltage that the ScanEM-QC Electromagnetic Near-Field Probe
provides has high output resistance—60 kOhms. While it doesn’t present
any problem when using the ScanEM-QC Probe with a multimeter with high
input impedance, connecting the ScanEM-QC Probe to a 50 Ohms input of
a spectrum analyzer limits the DC signal to a maximum of 2.5mV without
affecting the AC performance.
Always Set the Level Dial to zero When Using the ScanEM-QC as a
Probe
ÎWhen the Level dial is set to zero, it disables the ScanEM-QC Probe’s own
indication—the LEDs and the speaker—preventing any influence on the output
signal.
Do not load the ScanEM-QC Probe’s output with less than 50 Ohms load
(such as connecting it in parallel to the inputs of a spectrum analyzer and 50
Ohms input of an oscilloscope). The ScanEM-QC Probe’s performance will
be reduced.
Though the ScanEM-QC Probe has a wide dynamic range, a very strong
field may overload it. This may result in harmonic distortions of the output
signal. The overload condition can be clearly seen on the screen of a
spectrum analyzer or an oscilloscope. Should this occur, simply move the

12
3M™ ScanEM-QC Electromagnetic Near-Field Probe farther away from the
emission source until distortions go away.
Amplified Near-Field Probes for a Spectrum Analyzer
Connect the ScanEM-QC Probe to the INPUT of the spectrum analyzer
with the supplied cable. Some spectrum analyzers require the use of a
BNC-to-N adapter.
The performance of the ScanEM-QC Probes is superior to those of passive
probes. The ScanEM-QC Probes have broad and flat frequency responses
within a specified range (see page 13 for details). The ScanEM-QC Probe’s
built-in amplifiers provide ~20dB of gain, eliminating the need for an
external pre-amplifier.
Figure C shows a typical frequency response
of the 3M™ ScanEM-EQC Probe vs. an
equivalent passive probe. As seen, passive
probes typically fail at lower frequencies
(below 200MHz) where most of the
fundamental frequencies and many of the
strongest harmonics of the tested equipment
are located.
Avoid overloading the probes with a very
strong field—it may induce distortions in the
ScanEM-QC Probe amplifiers. The ScanEM-EQC Probe, for example,
begins to overload at field strengths of approximately 4V/m.
CAUTION!
UNLIKE SOME PASSIVE PROBES, THE SCANEM-QC PROBE IS NOT A REVERSIBLE
DEVICE—DO NOT SUPPLY A SIGNAL INTO ITS OUTPUT! IT CAN PERMANENTLY DAMAGE
YOUR PROBE.
Figure C: Typical Frequency
Response of 3M™ ScanEM EQC
Probe vs. Passive Probe

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Non-Contact Oscilloscope Probes
When connected to an oscilloscope, the 3M™ ScanEM-QC Electromagnetic
Near-Field Probe becomes a broadband non-contact probe, which is a great
diagnostics and troubleshooting tool. The typical challenge for oscilloscope
measurements is that the probe loads the circuit and affects its behavior. The
typical solution for this problem is to make 100x1 or even 1000x1 probes
that have extremely high input impedance and low capacitance. That may
work in some applications; but for many, the signal attenuated 100 or even
1000 times is too low to analyze with the scope. The ScanEM-QC Probe
makes no physical contact with the device under test, therefore it offers no
loading whatsoever on the circuit under test.
Another problem inherent with scope probes is their bandwidth. Probes
typically have 60, 100 or 250MHz bandwidth. Cost for higher frequency
probes is prohibitively high. With today’s high-speed circuits, low-bandwidth
tools may easily miss nanosecond-long transients, leaving engineers to
wonder why their circuits behave the way they do. The bandwidth of the
3M™ ScanEM-EQC Electromagnetic Near-Field Probe is at least 2GHz,
outperforming most any oscilloscope probe on the market. In addition, the
Typical Response of an H-Field Probe
Figure F: Typical Response of a 3M™
Scan EM-QC Probe as an H-Field Probe
Typ ica l re s p o n s e o f S c a n E M -H Q C a s a cu rren t p ro b e
Typ ica l resp o n s e o f S c a n E M -E Q C a s a v o lta g e p ro b e
Typical Response of an E-Field Probe
Figure E: Typical Response of 3M™ Scan
EM-QC Probe as an E-Field Probe

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3M™ ScanEM-QC Electromagnetic Near-Field Probe amplifies the signal
instead of attenuating it, allowing viewing even of the weakest signal on the
screen.
The ScanEM-EQC Probe measures an electrical radiated field that is
a representation of the voltage in the circuit. The ScanEM-HQC Probe
measures a magnetic field in the cable that is a representation of the current
in that cable. You will be able to monitor high-frequency currents on a
signal or power trace without cutting the trace or spending hundreds or
thousands of dollars on a special current probe that only works at much
lower frequencies.
The ScanEM-QC Probe, as any field probe would, shows the signal slightly
differently than the one actually residing on the trace. This is due to an
antenna factor of the trace. Experimenting with the ScanEM-QC Probe and
the oscilloscope probe will show you the difference. Also, the ScanEM-QC
Probes pick the sum of the emissions from the adjacent traces and wires, so
some discretion is needed when assessing the signal on the screen.

15
Broadband Field Strength Probe for a Multimeter
3M™ ScanEM-QC Electromagnetic
Near-Field Probe provides DC
voltage that is a function of field
strength. Connect ScanEM-QC
Probe to the multimeter set to Volts
DC (typical scale of 2V). You
will need BNC to Banana Plug
adapter. Set the Level dial to 0 (left-
most position). In absence of the
electromagnetic field the multimeter
should show 0V. Should the multimeter display any other voltage reading,
use it as the correction factor to any further field measurements. You can
characterize ScanEM-QC’s Probe output using GTEM cell, etc. and then
convert ScanEM-QC’s output into absolute values of the field strength.
When using ScanEM-QC Probe with a multimeter, avoid touching the tip
of ScanEM-QC Probe with your hand — it may induce a feedback between
typically non-shielded circuitry in a multimeter and the ScanEM-QC Probe
antenna that just got many times bigger by virtue of your touching it.
A typical transfer function of 3M™ ScanEM-EQC Probe is shown in the
figure to the left. This figure is given for reference only. All specifications
are subject to change without notice.
Know What You are Measuring
ÎA word of caution: Avoid misleading numerical readings of the field strength by
understanding what you are actually measuring. ScanEM-QC Probe measures
the field strength at its tip. In the near field the field strength fluctuates
dramatically depending on the distance from the source. Slight repositioning
of the tip of ScanEM-QC Probe may result in different readings.
ScanEM-EQC DC Response
(typical)
1
1 0
100
1000
10000
0 500 1000 1500 2000 2500 3000 3500
F ie ld S tr e n g th , m V /m
D C O u t p u t , m V
3M™ Scan EM-EQC Probe DC Response
(typical)

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Examples of 3M™ ScanEM-QC Electromagnetic
Near-Field Probes Apllications
Checking for EMC Compliance in Production
Why would this be necessary if the product was already approved? It is
simple: an engineer can make one unit to be compliant with regulations, but
you must know that every unit being produced is EMC compliant.
An improperly installed or missing gasket, a missing washer, a loose screw, a
poorly routed cable, a missing ferrite clamp—none of this would show up at
the functional test and yet any of these process variations may cause you to
unknowingly ship a product that is in violation with government regulations.
A quick check with the 3M™ ScanEM-QC Probes will help prevent this.
The ScanEM-QC probes were designed for and in cooperation with FCC,
whose agents use these probes to spot-check for emission violators in the field.
The sensitivity and other parameters of the ScanEM-QC Probes performance
were set by the FCC Engineers to provide the best correlation with the far-
field test.
The following is a procedure on how to use the ScanEM-QC Probe for
checking a computer for compliance as recommended by the FCC. Test of
other products should be performed in a similar manner.
The Process
A completely assembled and tested product needs to be tested for radiated and
conducted emission. The entire test should take no more than 15-20 seconds.
In order to assure an accurate test, you need to make sure that the test
environment is free of extraneous emission and that the power supplied to
your product under test is reasonably clean. If the power line is “dirty,” you
may want to use a line filter or line conditioner that performs a filtering
function (surge protectors do not clean the power line from the RF noise).

17
CAUTION!
MAKE SURE THE MONITOR IS 12 OR MORE INCHES (30 CM) FROM THE 3M™ SCANEM-QC
ELECTROMAGNETIC NEAR-FIELD PROBE!
A computer has four major areas to look at for excessive radiation: (1) cables
attached to input/output connectors; (2) openings in the case for switches,
speed readouts, etc., (3) case joints where the two halves of the chassis may
not fit properly, and (4) the AC power cord. You will be looking for units that
produce a probe response of at least four or five LEDs being lit.

18
Checking for Radiated Emission with the 3M™ ScanEM-EQC
Electromagnetic Near-Field Probe
1. Calibrate the probe by moving it away from the product and setting the
Level dial to light only the green LED. Take precautions to ensure that
no extraneous RF fields are affecting the setting. To do this, compare
the probe level setting at various places within the building. If the probe
level setting is unaffected or only slightly affected, then it is unlikely that
extraneous fields are affecting the probe. If you have any concern that
extraneous RF fields are affecting the probe, the computer system should
be relocated to a different building and the calibration process repeated.
2. Investigate the input/output cables on the computer by placing the
ScanEM-EQC Probe antenna next to the I/O cable(s). Watching the
LED response and listening to the change in audio pitch, move the probe
along the cable to locate the point where the probe response is highest.
The angle of orientation of the rod antenna relative to the cable should be
varied to produce the maximum also. The cable should not be handled at
the time it is being investigated. Recheck the probe Level setting.
3. Chassis seams and openings in the chassis are investigated similarly, by
moving the probe along seams and around openings in the chassis. When
energy is detected the probe rod antenna is manipulated in a manner that
evokes the maximum response. Recheck probe Level setting.
4. This probe (ScanEM-EQC Probe) should not be used to investigate the AC
power cord. The magnetic (ScanEM-HQC Probe) probe is used for this cord.
5. If in any of the above investigations a response of four or five LEDs is found,
then the unit should be considered to be noncompliant. Alternate components
should be substituted or other corrective measures taken until a functional
system that does not produce the requisite probe response is obtained.

19
Checking for Conducted Emission with the 3M™ ScanEM-HQC
Electromagnetic Near-Field Probe
1. Calibrate the probe by moving it away from the product and setting the
Level dial to light only green LED. Take precautions to ensure that no
extraneous RF fields are affecting the setting. A determination of this can
typically be accomplished by comparing the probe level setting at various
places within the building. If the probe level setting is unaffected or only
slightly affected, then it is unlikely extraneous fields are affecting the
probe. If you have any concern that extraneous RF fields are affecting the
probe, the computer system should be relocated to a different building and
the calibration process repeated.
2. Place the computer AC power cord longitudinally in the center of the
ferrite core as tightly as possible. Move the probe up and down the length
of the power cord. If a high energy level is detected, check the gain of the
probe and remeasure the AC power cord. If four or five LEDs light, then
the unit should be considered noncompliant. Generally, this problem can
be corrected by substituting a power supply that has a built-in RF filter. In
unusual situations, addition of ferrite beads on some or all of the power
supply output leads inside the computer case may be required to correct
the problem.

20
Conclusion
Once the test methodology is set, the entire EMC check of the complete
product should take no more than 10-15 seconds. It is recommended to
thoroughly explore one sample of the product and note where the “hot” spots
are and what areas are most prone to cause emission problems. This will
help you to pay more attention to potentially troubled spots.
If you would like to “attach the numbers” to the test data, connect output of
the 3M™ ScanEM-QC Electromagnetic Near-Field Probe to a multimeter so
that you can observe and record the field strength data. You will need the
BNC-to-banana plug adapter for that—please see page 6 of this User’s Guide
for accessories. An ISO-9000 company can benefit from setting numerical
limits to emission based on known good product.
Other Applications
Measuring Efficiency of Shielding
Measure the field strength before and after the shield is applied to know the
actual effectiveness of shielding. Measuring the field strength on both sides
of the shield also helps to evaluate shielding.
The 3M™ ScanEM-EQC Probe and a multimeter can be used to check the
quality of applied shielding and gaskets in production. A quality inspector
can be supplied with the maximum allowed DC voltage at critical points.
EMC Pre-Compliance and Troubleshooting
Connect the ScanEM-QC Probe to the input of the spectrum analyzer. Set the
spectrum analyzer to the desired settings (if in doubt, use default settings on
power-up). Press and hold the red Operate button. Pass the tip of the ScanEM
Probe over the area in question. Should the emission level be too high, you
may need to change the attenuation of the spectrum analyzer’s input.