Anritsu AWGN MU368060A User Manual
MU368060A
AWGN Unit
Operation Manual
Fourth Edition
•
Read this manual before using the equipment.
•
To ensure that the equipment is used safely, read
the "For Safety" in the MG3681A Digital Modulation Signal Generator Operation Manual first.
•
Keep this manual with the equipment.
ANRITSU CORPORATION
Document No.: M-W1955AE-4.0
MU368060A
AWGN Unit
Operation Manual
1 August 2001 (First Edition)
1 December 2003 (Fourth Edition)
Copyright © 2001-2003, ANRITSU CORPORATION.
All rights reserved. No part of this manual may be reproduced without the prior written permission of the
publisher.
The contents of this manual may be changed without prior notice.
Printed in Japan
ii
Equipment Certificate
Anritsu Corporation certifies that this equipment was tested before
shipment using calibrated measuring instruments with direct traceability
to public testing organizations recognized by national research laboratories including the National Institute of Advanced Industrial Science and
Technology, and the Communications Research Laboratory, and was
found to meet the published specifications.
Anritsu Warranty
Anritsu Corporation will repair this equipment free-of-charge if a malfunction occurs within 1 year after shipment due to a manufacturing fault,
provided that this warranty is rendered void under any or all of the following conditions.
The fault is outside the scope of the warranty conditions described in
•
the operation manual.
The fault is due to mishandling, misuse, or unauthorized modification
•
or repair of the equipment by the customer.
The fault is due to severe usage clearly exceeding normal usage.
•
The fault is due to improper or insufficient maintenance by the cus-
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tomer.
The fault is due to natural disaster including fire, flooding, earthquake,
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etc.
The fault is due to use of non-specified peripheral equipment,
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peripheral parts, consumables, etc.
The fault is due to use of a non-specified power supply or in a non-
•
specified installation location.
In addition, this warranty is valid only for the original equipment purchaser. It is not transferable if the equipment is resold.
Anritsu Corporation will not accept liability for equipment faults due to
unforeseen and unusual circumstances, nor for faults due to mishandling
by the customer.
Anritsu Corporation Contact
If this equipment develops a fault, contact Anritsu Service and Sales offices at the address at the end of paper-edition manual or the separate file
of CD-edition manual.
iii
Notes On Export Management
r
r
f
This product and its manuals may require an Export License/Approval by
the Government of the product's country of origin for re-export from you
country.
Before re-exporting the product or manuals, please contact us to confirm
whether they are export-controlled items or not.
When you dispose of export-controlled items, the products/manuals are
needed to be broken/shredded so as not to be unlawfully used for military
purpose.
Disposing of Product
This equipment uses chemical compound semiconductors including
arsenide. At the end of its life, the equipment should be recycled o
disposed properly according to the local disposal regulations.
Trademark and Registered Trademark
MS, Microsoft, MS-DOS and Windows are the registered trademark o
Microsoft Corporation in the United States and/or other countries.
IBM and AT are the registered trademark of International Business Machines Corporation.
NI-488.2TM is a registered trademark of National Instruments Corporation.
iv
CE Conformity marking
Anritsu affixes the CE Conformity marking on the following product (s) in
accordance with the Council Directive 93/68/EEC to indicate that they
conform with the EMC and LVD directive of the European Union (EU).
CE marking
1. Product Model
Plug-in Units: MU368060A AWGN Unit
2. Applied Directive and Standards
When the MU368060A AWGN Unit is installed in the MG3681A, the
applied directive and standards of this Unit are conformed to those of
the MG3681A main frame.
PS: About main frame
The kind of main frame (a measuring apparatus) will be to increase.
Please, contact us about the newest information of the main frame.
v
C-tick Conformity marking
Anritsu affixes the C-tick marking on the following product (s) in accor-
dance with the regulation to indicate that they conform with the EMC
framework of Australia/New Zealand.
C-tick marking
1. Product Model
Plug-in Units: MU368060A AWGN Unit
2. Applied Directive and Standards
When the MU368060A AWGN Unit is installed in the MG3681A, the
applied directive and standards of this Unit are conformed to those of
the MG3681A main frame.
PS: About main frame
The kind of main frame (a measuring apparatus) will be to increase.
Please, contact us about the newest information of the main frame.
vi
About This Manual
This operation manual offers an overview, sample measurement and re-
mote control of the MU368060A AWGN Unit.
The MU368060A AWGN Unit is mounted to the MG3681A Digital Modu-
lation Signal Generator.
represents a panel key.
The "MG3681A Digital Modulation Signal Generator Operation Manual"
is provided separately. Refer to them together with this manual.
I
Table of Contents
About This Manual........................................ I
Section 1 Overview.................................... 1-1
1.1 Product Outline............................................................. 1-2
1.2 Product Configuration................................................... 1-3
Section 2 Storage and Transportation..... 2-1
2.1 Precautions for Long-term Storage .............................. 2-2
2.2 Repacking and Transportation ..................................... 2-3
Section 3 Operation Overview .................. 3-1
3.1 Setting the Parameters................................................. 3-2
3.2 Power Accuracy for the Calculated Bandwidth ............ 3-6
Section 4 Sample Measurement ............... 4-1
4.1 Evaluation Measurement for the Receiver ................... 4-2
Section 5 Sample Calibration ................... 5-1
5.1 Calibration of the Output Level..................................... 5-2
Section 6 AWGN Internal Adder
Function..................................... 6-1
6.1 Product Outline............................................................. 6-2
6.2 Operation when Selecting W-CDMA ............................ 6-3
6.3 Function Details............................................................ 6-6
6.4 Operation when Selecting 1xEVDO ............................. 6-8
6.5 Function Details when Selecting 1xEVDO ................... 6-10
II
Section 7 Remote Controls ....................... 7-1
7.1 Device Message List by Function................................. 7-2
7.2 Alphabetical Device Message List................................ 7-5
7.3 Device Message List for each AWGN Internal Adder
Functions when Selecting W-CDMA ............................ 7-12
7.4 Alphabetical Device Message List for AWGN
Internal Adder Function when Selecting W-CDMA ...... 7-13
7.5 Device Message List for AWGN Internal Adder
Functions When Selecting 1xEVDO............................. 7-17
7-6 Alphabetical Device Message List for AWGN
Internal Adder Function When Selecting 1xEVDO....... 7-18
Section 8 Performance Test...................... 8-1
8.1 Performance Test ......................................................... 8-2
8.2 Devices used in Performance Test .............................. 8-3
8.3 RF Output Level Accuracy............................................ 8-4
8.4 In-band Power Calculation Accuracy ........................... 8-5
Appendix.................................................... App-1
Appendix A Specifications................................................... A-1
Appendix B Initial Value List................................................ B-1
Appendix C Performance Test Result Sheet ...................... B-1
Index........................................................... Index-1
III
IV.
Section 1 Overview
This section describes the product outline and manual configuration for
the MU368060A AWGN Unit.
1.1 Product Outline........................................................... 1-2
1.2 Product Configuration ................................................ 1-3
1-1
Section 1 Overview
1.1 Product Outline
The MU368060A is an AWGN (Additive White Gaussian Noise) Unit
mounted on the MG3681A Digital Modulation Signal Generator (hereafter,
main frame).
Mounting the MU368060A on the main frame enables noise signals to be
generated for reception sensitivity test of CDMA 2000 modulation radio
equipment.
1-2
1.2 Product Configuration
The standard configuration of the MU368060A is shown below. When
unpacking, check that the listed products are provided. If a missing or
damaged component is found, please contact Anritsu or its distributors.
1.2 Product Configuration
Item
Main Unit MU368060A AWGN Unit 1
Accessory W1955AE Operation Manual 1
Model name and
number
Part name
Quan-
tity
Remarks
1-3
Section 1 Overview
1-4.
Section 2 Storage and Transportation
This section describes precautions on storage and transportation of
MU368060A.
2.1 Precautions for Long-term Storage............................ 2-2
2.2 Repacking and Transportation ................................... 2-3
2-1
Section 2 Storage and Transportation
2.1 Precautions for Long-term Storage
Avoid storing the MU368060A in places where:
It may be exposed to direct sunlight
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It is dusty
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It is humid and condensation may form
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It may be exposed to active gases
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It may oxidize
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The following temperature and humidity exists
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Temperature : < –20°C, > 60°C
Humidity : ≥ 90%
Recommended Storage Conditions
When MU368060A is stored for long periods, we recommend observing the
following conditions in addition to those described above:
Temperature : 0 to 50°C
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Humidity : 40 to 80%
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A location where the temperature and humidity are stable throughout
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the day.
2-2
2.2 Repacking and Transportation
Precautions on transportation of MU368060A are shown below.
Repacking
Use the original packing material (box), if available. If not available,
follow the procedures shown below to repack the MU368060A.
[1] Cover the MU368060A with a conductive vinyl.
[2] Prepare a cardboard/wood/aluminum box large enough to store the
MU368060A and the cushioning material to cover it.
[3] Put the MU368060A into the box. Then put cushioning material
around it to prevent it from moving in the box.
[4] Firmly close the box with packing string, adhesive tape or bands.
Transportation
During transportation, avoid vibration where possible and maintain the
"Recommended Storage Conditions" above.
2.2 Repacking and Transportation
2-3
Section 2 Storage and Transportation
2-4.
Section 3 Operation Overview
This section explains the basic screens when MU368060A is mounted on
the main frame.
3.1 Setting the Parameters .............................................. 3-2
3.2 Power Accuracy for the Calculated Bandwidth .......... 3-6
3-1
Section 3 Operation Overview
3.1 Setting the Parameters
When
pears. This screen is for basic parameter settings on digital modulation.
Details on the Main screen settings are described below.
Digital Mod
is pressed, the key lamp lights and the Main screen ap-
[1] I/Q Mod.
When Digital Modulation is set to “On”, this unit outputs noise.
When set to “Off”, it outputs CW signal.
Setting item : Int, Ext, Off
[2] System
Sets the communication system.
Setting item : NOISE1
[3] Noise
Sets the bandwidth for the noise to be generated.
Setting range : 1.5 to 16 MHz, resolution: 1 kHz
[4] Calculated
Sets the calculated bandwidth.
Setting range : 10 to 80% of the inputted setting value for the
noise bandwidth
Resolution : 1 kHz
3-2
3.1 Setting the Parameters
[5] Calculated Level
Calculates the calculated level internally based on the inputted cal-
culated bandwidth. Displays the power ratio of the band specified
in [4] to the total power for the RF output of the signal generator.
[6] (Absolute)
Displays the power in the calculated bandwidth.
Displayed value = RF output level + Calculated Level
3-3
Section 3 Operation Overview
Calculating the power for the calculated bandwidth
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The noise generator can be explained by the following three parameters.
Noise Bandwidth:
Sets the band for the noise to be generated.
Bandwidth set here is for the flat part of the noise as shown in the
figure below.
Calculated Bandwidth:
Normally, same as the channel bandwidth for the communication
system to be measured.
Calculated Level:
Displays the power ratio of the calculated bandwidth (
the total power of the spectrum in the figure below.
Carrier frequency
part) to
Setting value for the
calculated bandwidth
Setting value for the noise
bandwidth
Ideal spectrum for the noise signal
The power within the calculated bandwidth is therefore figured out with
the following formula:
The power within the calculated bandwidth = RF output level (total
power) + Calculated level
… (1)
3-4
3.1 Setting the Parameters
Example:
Suppose that the following parameters are set for this unit:
Output Level : −10 dBm
Digital Mod : On
System : Noise1
Noise Bandwidth : 7.68 MHz
Calculated Bandwidth : 3.84 MHz
From Formula (1),
Power within the calculated bandwidth
RF output level + Calculated level
=
10 dBm + (−3.45 dB)
= −
13.45 dBm
= −
Therefore, the power within the calculated
bandwidth for the RF output is –13.45 dBm.
The power –13.45 dBm is displayed at “(Ab-
solute)”.
3-5
Section 3 Operation Overview
3.2 Power Accuracy for the Calculated Bandwidth
From Formula (1) in Section 3.1, accuracy for the power within the calcu-
lated bandwidth varies depending on the accuracy for the RF output level
and the power calculation level. When the user does not perform calibra-
tion, accuracy is the added value of these two error elements.
Accuracy of the power within the calculated bandwidth
RF output level error + Calculated level error .................(2)
=
(Level accuracy at CW ± 3.0 dB) + (± 0.6 dB or ± 2.0 dB)* ....(3)
=
*: ±0.6 dB when the setting value for noise bandwidth
is ≤8 MHz.
±2.0 dB when the setting value for noise bandwidth
is >8 MHz.
RF output level accuracy
•
The standard for the RF output level accuracy is ±3 dB level accuracy at
CW. However, it is relatively easy to calibrate it by using the power
meter. When calibrated, the error for the RF output level can be
reduced to the measurement accuracy of the power meter.
Calculated level accuracy
•
The calculated level displayed is figured out under ideal conditions and
with the frequency characteristic for the analogue circuit flat. On the
other hand, the actual RF output signal may not be flat according to the
frequency characteristic for the analogue circuit. The distortion of
frequency characteristic results in an error in the calculated level.
3-6.
Carrier frequency
Level range
Setting value for the
calculated bandwidth
Setting value for the noise bandwidth
Spectrum for MU368060A
Section 4 Sample Measurement
This section explains sample measurement when MU368060A is mounted
on the main frame.
4.1 Evaluation Measurement for the Receiver................. 4-2
4-1
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