EMTEST CWS 500A / 75 User manual

ELECTROMAGNETIC COMPATIBILITY CONSULTING AND SIMULATION
Continuous Wave Simulator
Type CWS 500A / 75
IEC 61000-4-6 / EN 61000-4-6
MANUAL
Version : 2.10 / 26.10.00
Replaces : 2.01 / 25.05.00
Filename : CWSA-A5.DOC
Printdate : 22.08.01

CONTENTS
1. Safety ............................................................................................ 3
1.1. Safety aspects............................................................................ 3
1.2. Prior to Turning on the Equipment ............................................. 4
1.3. Maintenance, Adjustments, Exchange of parts ......................... 5
1.4. Testing and danger .................................................................... 6
1.4.1. Measures: .................................................................................. 7
1.4.2. Testing ....................................................................................... 7
1.4.3. Danger from the EUT................................................................. 8
2. Setup the CWS 500A.................................................................... 9
2.1. Connections CWS 500 .............................................................. 9
2.2. Test setup CWS 500................................................................ 10
2.3. Part names and Functions ....................................................... 11
3. Frequently Asked Questions .................................................... 13
4. Operating Functions.................................................................. 14
4.1. Front view................................................................................. 14
4.2. Rear view ................................................................................. 15
5. Operation .................................................................................... 17
5.1. Description of the menus ......................................................... 17
5.2. Quick Start ............................................................................... 19
5.3. User test routines..................................................................... 20
5.3.1. Voltage sweep.......................................................................... 21
5.3.2. Frequency sweep..................................................................... 22
5.3.3. Dwell time sweep ..................................................................... 23
5.4. Standard test routines acc. to IEC 61000-4-6.......................... 24
5.5. Service ..................................................................................... 25
5.6. Set-up....................................................................................... 26
6. Putting into Operation ............................................................... 27
6.1. Security aspects....................................................................... 27
6.2. Generator function check......................................................... 29
6.3. Calibration................................................................................ 30
6.3.1. General .................................................................................... 30
6.3.2. Calibration setup EM TEST and IEC 61000-4-6 ...................... 31
6.3.3. Calibration set-up with CDN..................................................... 32
6.3.4. Calibration Menu ...................................................................... 33
6.3.5. Calibration set-up with EM Clamp............................................ 35
6.3.6. Calibration set-up Bulk current injection clamp (BCI) .............. 35
6.4. Fail Input .................................................................................. 36
6.5. Clipping .................................................................................... 36
7. Test Equipment CWS 500A ....................................................... 37
7.1. Construction............................................................................. 37

7.2. Control unit............................................................................... 38
7.3. Generator unit .......................................................................... 38
7.4. High frequency power unit ....................................................... 38
7.5. 6dB attenuator.......................................................................... 38
7.6. CDN Coupling/decoupling network .......................................... 39
7.7. Test set-up ............................................................................... 40
7.8. Test level and modulation ........................................................ 41
8. Technical Data............................................................................ 42
9. Maintenance ............................................................................... 45
9.1. General .................................................................................... 45
10. Delivery Groups ......................................................................... 45
10.1. Basic equipment ...................................................................... 45
10.2. Accessories and options .......................................................... 45
11. Remote Control .......................................................................... 46
11.1. Interfaces ................................................................................. 46
11.2. General information ................................................................. 47
11.3. Parameter of the remote commands ....................................... 48
11.4. C commands............................................................................ 49
11.5. N commands............................................................................ 50
11.6. K commands............................................................................ 50
11.7. A commands............................................................................ 51
11.8. Feedback messages................................................................ 51
12. ICD Software............................................................................... 52
12.1. Introduction .............................................................................. 52
12.2. Minimal PC requirements......................................................... 52
12.3. Installed Files on your Hard Drive............................................ 53
12.4. Installation / Remove ............................................................... 53
13. Appendix..................................................................................... 54
13.1. Schematic ................................................................................ 54
13.2. Declaration CE- Conformity ..................................................... 55
13.3. Declaration of safety requirements .......................................... 57
13.4. List of sales representatives .................................................... 58
14. Application.................................................................................. 60
14.1. Introduction .............................................................................. 60
14.2. Coupling network ..................................................................... 61
14.3. Calibration and testing ............................................................. 61
14.4. Test sequence as per EN 50082-2 .......................................... 62
14.5. EM Clamp connection in the test setup ................................... 62
14.6. Test Setup with BCI ................................................................. 63
14.7. Definitions ................................................................................ 64
14.8. Sources of interferences .......................................................... 65

3
1. Safety
1.1. Safety aspects
Observe all of these precautions to ensure your personal safety. The generators
correspond to Installation Category II (overvoltage category).
Read the following operation manual carefully. Pay special attention to both safety
and operation details!!!
Symbols marked on equipment
WARNING Risk of electric shock. Dangerous voltages are present. Use
extreme care. Refer to the manual.
GROUND Indicates protective earth terminal
Power Mains
The equipment is intended to operate with a power mains supply that will not apply
more than 250Vrms between the supply conductors or between either supply
conductor and ground. A proper ground connection, through the grounding
conductor in the power cord, is essential for safe system operation.
Safety Ground and grounding the generators
The generators are grounded through the power cord. To avoid electric shock, plug
the power cord into a properly wired receptacle where earth ground has been
verified by a qualified service person. Do this before making connections to the
input or output terminals of the test equipment.
Without the protective ground connection, all parts of generators are potential
shock hazards. This includes knobs and controls that may appear to be insulators.
The equipment MUST NOT BE USED if this protection is impaired.
Use the Proper Power Cord
Use only the power cord and connector specified for your product. Only use a
power cord that is in good condition.
Use the Proper Fuse
To avoid fire hazard, use only the fuse specified in the parts list for your product,
with matching type, voltage rating, and current rating.
Do Not Remove Covers or Panels
To avoid personal injury, do not operate the generators without the panels in place
or covers.
Do Not Operate in Explosive Atmospheres
The generators provides no explosion protection from electrostatic discharges or
arcing components. Do not operate them in an atmosphere of explosive gases
around explosive chemicals.
Electric Overload
Never apply a generator's voltage to a connector which is not specified for that
voltage range.

4
+Read the following operation manual carefully !!!
1.2. Prior to Turning on the Equipment
- Before putting the instrument into operation, please check the equipment
you have received for damage due to transportation. Check the single
boxes as well as the generator itself. In case of mechanical damage,
please contact the manufacturer before switching the unit on.
Damage due to transportation
- Prior to turning the equipment on check if the selected supply voltage
corresponds with the mains.
115V/230V ??
- Equipment of security class I which is powered by an auto transformer
may be considered as follows:
- if the equipment is powered by an auto transformer connected to a mains
of higher voltage, be sure that the “low” end of the auto transformer is
connected with the neutral of the mains;
- equipment of security class I with removable neutral or with mains plug:
It is only permitted to insert the power plug in a mains socket with
protective earth lead. It is not allowed to interrupt or disconnect the
protective earth connection.
Performance of Measurements
- Each interruption or disconnection of the protective earth connection
inside or outside the equipment may lead to a dangerous situation.
Intentional interruption is prohibited.
- Interconnections between such equipment or to others, e.g. remote
control to personal computer, may be completed with original cables
recommended by the manufacturer.

5
1.3. Maintenance, Adjustments, Exchange of parts
ATTENTION: Electrical maintenance must only be made by
instructed and specially skilled people.
The generator does not include any parts or components needing special
maintenance.
Electrical maintenance must only be performed by experienced, specially
instructed technicians. Generally, standard maintenance requires periodic
cleaning of the instrument and verification and calibrations of the specified
pulse parameters only.
- When removing the housing cover or other parts of the equipment, high
voltage parts may become exposed. High voltage and high current are
potentially lethal.
-For service, repair, adjustment, or replacement, the generator covers
have to be removed and the generator must be disconnected from all
power mains supplies.
-The user is not allowed to independently change or modify any EM TEST
generator. For service and repair only original EM TEST parts and
components shall be used. EM TEST is not responsible for any accident
or injury incurred through the use of other parts or components.
- If maintenance or service work is necessary, it must be performed only by
experts who are familiar with the existing danger.
- It has to be assured that only fuses of recommended type and nominal
current are used for replacement. It is not allowed to use repaired fuses.
Failures and Overstressing
- If it is assumed that a safe operating mode of the equipment is no longer
possible, the mains connection must be removed and the equipment
secured from unintentional use.
- An unsafe operating mode is characterized as follows:
- the equipment shows recognizable damages;
- the equipment is not working;
- the equipment has experienced severe transportation stress;
- the equipment has been stored in an unsuitable environment for some
time.
Please exercise prudence in determining whether a device is unsafe or not.

6
1.4. Testing and danger
All tests offered by the High Voltage or EMC generators are immunity tests
on electronic equipment or devices. These tests are potentially dangerous
for the operator. Therefore it is the responsibility of the user to avoid critical
failures and risks to the environment and operator.
Long and distributed lines of the EUT are able to radiate a certain energy to
their vicinity. Therefore it is also the responsibility of the user to decide
whether it is allowed to conduct immunity tests in a given installation.
Test voltages above 500V may generate spark discharges. Therefore it is
forbidden to test in an explosive environment.
National and international recommendations regarding human safety must
be followed.
People with certain health conditions, e.g. with a heart pace-maker or
similar device, should be excluded from testing.
Generator and coupling/decoupling network must be grounded and
connected to reference plane.
Test setup as per IEC 61000-4-6 (Conducted immunity testing)
For a test setup as per IEC 61000-4-6, the following safety aspects have to
be considered strictly:
For this test setup no ground fault relays can be installed at your
working area:
Reason:
1. The Coupling Decoupling Networks ( CDN ) have built in filter capacitors
to PE. The ground current to PE therefore is much higher and the fault
current relays will be continuously switching off the power mains supply.
2. Due to the specification of the decoupling networks, there exists also a
higher current to ground within the coupler/decoupler unit itself.
The same problem is well known in a setup for measuring conducted
emission. In this case the specified LISN is causing the above described
ground fault current.

7
1.4.1. Measures:
1. EMC and High Voltage test areas must always be supplied by a
decoupled and well known power mains supply.
2. The decoupling can be realized either by
- filtering
- or isolating transformer
3. In case of using an isolating transformer the test area again can be
protected by ground fault relays.
4. EMC and High Voltage test areas must always have a clear grounding
strategy.All coupling/decoupling networks, and all as all LISN’s must be
strictly and well connected to the ground reference plane of the test
setup.
5. Please ensure the correct current flow back to the generator. Missing
connections can cause overvoltages and danger for life. Therefore it is
absolutely recommended to use ground reference planes which are
connected to protective earth.
1.4.2. Testing
The test area must be organized so that only those involved in the test may
enter it. In case that the safety circuit is used to control the complete area
an additional interlock contact must be used to directly protect the operator
from contact with the EUT.
Neither the EUT nor any cables or accessories must be touched during the
test. During work on the EUT, the test procedure should be stopped and the
EUT disconnected from the power mains supply.
The EUT must be tested within a safety box or within a protected area. In
extreme circumstances the EUT may explode or ignite.

8
1.4.3. Danger from the EUT
The device under test can
become dangerous due to the
influence of the applied test
pulses or test energy.
Therefore the operator shall take care to the following aspects:
-As soon as the EUT ceases to operate as intended the test shall be
stopped immediately.
-In the case of internal damage, high voltages might be exposed at any
point of the EUT.
-Cables and connectors can be overloaded by high voltages or energies.
-Due to internal damage of components,° explosion and fire may occur.
-Unintended use of the EUT may cause hazardous situations in the
vicinity of the test setup.
Never touch the EUT or anything connected to the EUT
during a test
It is suggested that you read the operating manual carefully and
completely. It is absolutely necessary to observe and comply with the
security indications.
Safety functions:
- Please use the integrated “safety Circuit” function to protect the operator
from direct contact to high voltage.

9
2. Setup the CWS 500A
2.1. Connections CWS 500
Below are all possible connections to the CWS 500A.
The RF signal output
is on the BNC plug
on this side.
Fig 1 : CWS 500 connection front side
Fig 2 :All other
connectors are on
the rear.
Fig 2 : CWS 500 connection rear view

10
2.2. Test setup CWS 500
Test Setup with CDN
Test Setup with CNC 508

11
2.3. Part names and Functions
Continuous-Wave-Simulator
CWS 500A
Switching Matrix
CNC 508 1:8 Switching Matrix for
CDN, EM clamp, and other devices
Attenuator 6 dB
6dB / 40 W
6dB / 75W
Coupling decoupling Network
Types:
CDN-M 1; M 2; M 3; M4; M 5;
CDN-S1-50/75Ω; S 2; S 4; S 9; S 15; S 25;
CDN-S 37; S 68;
CDN-T 2; T 2-RJ11; T 4; T8-RJ45;
CDN-AF 2: AF 3; AF 4; AF 8
EM Clamp
Type F2031
Bulk Current Injection clamp BCI
F-120-9A Current injection clamp BCI
FCC-BCICF-4 Calibration Fixture for
BCI clamp (jig)
Current probe
F-33-2 Current probe for monitoring
1kHz – 250MHz

12
Calibration
CWS-Cal Basic calibration kit
Transport case
150Ωto 50ΩAdapter
BNC cable 0.5m
Cal adapter according to CDN
Adapter
R100 150Ωto 50ΩAdapter
R100A 150Ωto 50ΩAdapter for current
clamp cal fixture

13
3. Frequently Asked Questions
No items under this chapter. See in other chapter if you have a questions.
For other information ask contact the local sales representative or send a
email to EM TEST AG
[e-mail]
sales @emtest.ch

14
4. Operating Functions
4.1. Front view
2
F2 F3 F4 F5 F6 F7F1
3
TEST ON
<− −>
EXIT ESC
4
6
5
CWS 5 0 0
RF Out
8
7
EM TEST
1
9
1Display
2”Test On"
3Function keys "F1..F7"
4Cursor keys "←" and "→"
5Knob (Inc / Dec)
6Exit
7Escape
8RF output
9LED RF output monitor
1Display
All functions and parameters are displayed (8 lines with max. 40 characters).
2 Test On
By pressing the key "TEST ON", the test procedure will be started with the
preselected parameters.
3 Function keys "F1 .. F7"
Parameters and functions, displayed in the lowest line, and functions,
displayed with ” F “, can be selected with the related function key.
4 Cursor keys
Parameters and functions can be changed during the test. The selection of
these parameters is done with the cursor, moving it left or right. The increment
value of the selected parameters in the lowest line can also be selected by
the cursor keys.
5 Knob (Inc / Dec)
The knob increments or decrements test parameters with a numeric value or
selects from a list of parameters.
6 EXIT
The EXIT button will reset the firmware to the main screen. This is only
possible if no test routine is running.
7 ESC
The ESC button returns back to the previous level in the menu.
8 RF-output

15
At this output the RF power is available. The 6dB-attenuator is connected via
coax cable. For conducting tests together with CDN’s, EM clamps or current
injection clamps, the generator must always be loaded with a 6dB-attenuator
(see chapter 5.5 Test Set-up).
Output: 0-30Vrms e.m.f. after the 6dB-attenuator.
9 LED RF output monitor
When the RF output is active this LED on the front panel is illuminated to
indicate that a test signal is applied to the test object.
4.2. Rear view
CAL. INPUT
RS 232 CN
IEEE 48 8
1
2
35
4
FAIL 2
FAIL 1
6
7
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MAINS
50/60Hz
Amp In SG Out
1CAL input
2Power on
3Serial interface RS 232
4IEEE interface
5Remote control connector
6Fail 1 detection "Stop"
7Fail 2 detection "Pause"
8Connection signal generator to amplifier
1 CAL input
This input is used as a HF voltmeter. For the calibration procedure (see
paragraph 4.3 calibration) the measured RF test level will be handled by the
controller and a calibration file is generated (max. voltage at the Cal input
Umax rms = 3V !).
2 Power on switch
The switch and the mains fuses are part of the filter.
230V / 3.15AT or 115V / 6.3AT
3 Serial interface
RS 232 interface with a 9-pin connector.
4 Parallel interface IEEE
IEEE 488 interface with IEEE connector.
5 Remote control connector
The external coupling matrix is controlled via this remote control connector.
6 Fail detection FAIL 1 (TEST STOP)
The BNC input FAIL 1 can be used for failure detection on the EUT. If the
input is set to ground (chassis), the CWS 500 generator will be stopped and
the actual test routine is finished. It is not possible to continue the test routine.

16
A complete restart of the routine is necessary.
The message "FAIL 1" is indicated in the LCD-Display as well as in the ICD
software.
7 Fail detection FAIL 2
The BNC input FAIL 2 can be used for failure detection on the EUT. If the
input is set to ground (chassis), the failure will be detected and the test
continues normally. After 10 FAIL 2-Events the program will be terminated
and the message ”FAIL 2“ is indicated in the LCD-Display as well as in the
ICD software.
A protocol of the FAIL 2-events will be added to the hardcopy of the print
setting.
8 Amp In / SG Out
The internal amplifier can be controlled by an external signal generator. For
this operation, the short-circuit link must be disconnected. The external signal
generator must be plugged into the connector Amp In.

17
5. Operation
5.1. Description of the menus
The simulator is operated by an easy menu
control system. Seven function keys are
available to select parameters and functions.
The selected parameter is blinking and can be changed by
turning the knob (incr./decr.). The digit to be changed can
be selected with the cursor (ÍÎ ).
ESC will take you back to the previous level in the menu
and set the displayed values. The latest settings are
stored automatically and will be recalled when the menu is
selected again.
EXIT will reset the firmware to the main screen.
All functions are indicated on the display; max. 8 lines and
40 characters.
Start-up display
EM TEST Warm Up
C W S 5 0 0
RF 9kHz – 250 MHz
V 3.00 SWN: 001234
←Generator Model
←Frequency range
The dersion number and the software number SWN are used for tracing
reasons. These numbers are listed in the test reports and calibration
certificates. These numbers also are listed within the test reports generated
by the software report generator.

18
Page 1 (Main menu)
MAIN MENU
F1 : Quick Start
F2 : User test routines
F3 : Standard test routines
F7 : Service
F1 F2 F3 F4 F5 F6 F7
F1 Quick Start
Easy and fast operation of the equipment without special functions
(memory).
F2 User test routines
The user can save and recall his own specific test routines. He can select
standard routines or special functions such as automatic change of voltage
or frequency during a test routine.
F3 Standard test routines
The user can call up the standard routines as per IEC 61000-4-6 level 1 - 3
and start them immediately.
The CWS 500A will be delivered with preprogrammed values of the actual
standard IEC 61000-4-6 / EN 61000-4-6.
Service
Set-up can be selected and displayed.

19
5.2. Quick Start
Easy and very fast operation of all standard functions of the equipment.
Page 2 (Show parameters) Page 3 (Change)
QUICK START QUICK START
V = 10,0V Mod = 1kHz
f = 5.0MHz Cal = F1 Voltage V : 1.0 V - 30.0V
Frequency f :0.009 MHz - 250.0MHz
V Mod f Cal
START CHANGE CA L P R IN T 10 ON 10.0 F1
F1 F2 F3 F4 F5 F6 F7 F1 F2 F3 F4 F5 F6 F7
Press START to begin testing.
Press CHANGE and the actual parameters can be changed.
Press CAL for calibration of the system (see paragraph 4.3 Calibration)
PRINT will print a hardcopy of the set-up via the serial interface RS232.
The test begins by pressing START. The blinking parameter can be
changed with the knob inc./dec. Use the cursor keys (ÍÎ ) to select other
parameters. By pressing STOP the test will be stopped and on the last line
on the display it will be indicated that the test has been stopped.
Test break
START CHANGE CONT. CAL PRINT
F1 F2 F3 F4 F5 F6 F7
Pressing any of the function keys will display the functions START,
CHANGE, CONTINUE, CAL or PRINT. Selecting another function than
CONTINUE will stop the test routine definitely. Pressing START restarts the
test from the beginning.
While the test procedure is in progress, the setting of Cal cannot be
changed. PRINT prints the setting of the shown menu via the serial
interface RS 232 to a printer. If a test has been stopped by the user (STOP)
and continued (CONTINUE) a protocol of all breaks will be added (max. 10
user breaks).