Rohde & Schwarz CMW-K998 User manual

R&S®CMW-K998
Customer Path Correction
User Manual
User Manual
(;ÙÖÞ2)
1175.7280.02 ─ 02
Test & Measurement
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This user manual describes the following R&S®CMW options:
●R&S®CMW-K998 (Enable customer path correction)
© 2013 Rohde & Schwarz GmbH & Co. KG
Mühldorfstr. 15, 81671 München, Germany
Phone: [phone] - 0
Fax: [phone]
E-mail: [email protected]
Internet: www.rohde-schwarz.com
Subject to change – Data without tolerance limits is not binding.
R&S® is a registered trademark of Rohde & Schwarz GmbH & Co. KG.
Trade names are trademarks of the owners.
The following abbreviations are used throughout this manual: R&S®CMW is abbreviated as R&S CMW.
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Contents
R&S®CMW-K998
3User Manual 1175.7280.02 ─ 02
Contents
1Introduction............................................................................................ 3
2Required Equipment.............................................................................. 3
3Creating and Activating a Correction File........................................... 4
4Activating Another Correction File.......................................................7
1 Introduction
The R&S CMW provides a fully automatic correction of path errors. Before the instru-
ment leaves the Rohde & Schwarz factory, its RF paths are measured and a correction
file is stored on the instrument. After some time of usage the RF paths should be mea-
sured again and a new correction file be created. This is usually done by Rohde &
Schwarz service personnel.
Option R&S CMW-K998 "Enable customer path correction" allows you to create RF
path correction files yourself. This document describes the steps required to create and
apply an RF path correction file.
2 Required Equipment
You need the following hardware, software and licenses to create correction files:
●Power sensor R&S NRP-Z27 (order no. 1169.4102.02)
●Power sensor R&S NRP-Z28 (order no. 1170.8008.02)
●Customer path correction HW set R&S CMW-Z998 (order no. 1208.6129.02):
– Torque wrench for type N connectors, 1.5 Nm or 13.3 lb-in
– Torque wrench for SMA connectors, 0.6 Nm or 5.3 lb-in
– SMA to type N connector adapter
Attach this adapter to the RF cable of the R&S NRP-Z27.
●R&S CMW to be corrected
●R&S CMW-K998 "Enable customer path correction" (order no. 1207.3803.02)
This license must be ordered for each R&S CMW to be corrected.
●Software packages installed on R&S CMW:
–CMW BASE SW (≥ V3.0.12; for frequencies above 3.3 GHz: ≥ V3.2.20)
–CMW Additional Maintenance Package (for freq. above 3.3 GHz: ≥ V3.2.40)
– CMW GPRF SW
深圳德标仪器 135-1095-0799

Creating and Activating a Correction File
R&S®CMW-K998
4User Manual 1175.7280.02 ─ 02
3 Creating and Activating a Correction File
The creation and activation of RF path correction files is protected by a login with pass-
word. While you are logged in as "Service TPM", an additional section is available in
the "Setup" dialog of the instrument, allowing you to activate an available RF correction
file and to start a procedure creating a new correction file.
While the procedure is running, dialogs instruct you how to connect a power sensor to
the instrument. Besides this, the procedure runs automatically without user interaction.
Warm-up time
For good results the instrument must be in a steady state before the path correction
procedure is started. Switch on the instrument and let it warm up for at least one hour
before proceeding.
Manual interactions
Do not re-configure the instrument or modify the cabling during the correction proce-
dure unless requested to do so by a dialog.
To guarantee stable results, do not move or touch the RF cable of a connected power
sensor during a measurement.
The following steps describe in detail how to create an RF path correction file.
1. Press "Setup" at the (soft-)front panel to open the "Setup" dialog of the instrument.
2. Select section "System".
3. Press the softkey "User Mode Login".
The "User Mode Login" dialog opens.
4. For "User Mode" select "Service TPM" (Service Third Party Maintenance).
The password is included in the Technical Information for the CMW Additional
Maintenance Package (document number 1208.0280.02). You can download the
Technical Information from the "CMW Customer Web > Downloads > Technical
Information" section on GLORIS, the Global Rohde & Schwarz Information System:
https://extranet.rohde-schwarz.com.
Fig. 3-1: Login dialog
After a successful login the softkey changes to "Logout".
深圳德标仪器 135-1095-0799

Creating and Activating a Correction File
R&S®CMW-K998
5User Manual 1175.7280.02 ─ 02
5. Select section "Maintenance > Correction > RF Path".
This section is only displayed after a successful login.
Fig. 3-2: "RF Path" section of "Setup" dialog
6. If desired, modify the name of the correction file to be created.
The file name extension upd is added automatically if it is missing.
7. Press ON | OFF to start the path correction procedure.
Software tools are started in the background. This may take some time. Eventually
information dialogs are displayed that you must accept to continue.
Afterwards a dialog is displayed, showing the progress of the correction procedure:
Fig. 3-3: Progress information
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