Rohde & Schwarz ZVAX24 User manual

1312.7979.82-021
Service Manual Instrument
Extension Unit
R&SZVAX24
1311.2509k05
Test and Measurement

1312.7979.82 2 E-1
Dear Customer,
©2008 Rohde & Schwarz GmbH & Co. KG
81671 Munich, Germany
Printed in Germany – 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®ZVAX24 is abbreviated as R&S ZVAX24

R&S ZVAX24 Tabbed Divider Overview
1312.7979.82 RE E-1
Tabbed Divider Overview
Index
Grouped Safety Messages
Customer Information Regarding Product Disposal
Instructions for Electrostatic Discharge Protection
Safety Instructions for Units with Removable Cabinet
Procedure in Case of Service Ordering of Spare Parts
List of R&S Representatives
Contents of Manualsfor Extension Unit R&SZVAX24
Tabbed Divider
1 Chapter 1: Performance Test
2Chapter 2: Adjustment
3 Chapter 3: Repair
4 Chapter 4: Software Update / Installing of Options
5 Chapter 5: Documents

R&S ZVAX24 Index
1312.7979.82 I.1 E-2
Index
A
Alignment ....................................................................... 2.1
Available Power Cables ................................................. 5.2
B
Block diagram
Explanation .............................................................. 3.1
Board replacement
Fan .......................................................................... 3.9
Front hood ............................................................... 3.6
Power supply ........................3.8, 3.10, 3.11, 3.12, 3.13
Boards
Overview.................................................................. 3.4
D
Description of the Block Diagram ................................... 3.2
Documents..................................................................... 5.2
F
Fan
Replacement............................................................ 3.9
Front hood...................................................................... 3.6
Function description ....................................................... 3.1
I
Instrument construction .................................................. 3.1
O
Option
Installation ................................................................4.2
List ...........................................................................4.2
P
Performance test
Protocol .................................................................1.19
Performance Test ...........................................................1.1
Power cables..................................................................5.2
Power supply
Replacement ................. 3.7, 3.8, 3.10, 3.11, 3.12, 3.13
R
Repairs ...........................................................................3.1
Replacement
Boards......................................................................3.4
Replacing
Boards......................................................................3.4
Replacing the Interface R&S ZVX24 A400.....................3.5
S
Software update .............................................................4.1
Spare Parts ....................................................................5.2
T
Test equipment
Performance test ......................................................1.2
Test equpment
Troubleshooting.............................................3.14, 3.18
Testing the Interface Board...........................................3.19
Troubleshooting
Selftest ...................................................................3.15
Troubleshooting............................................................3.14

R&S ZVAX24 Service and Repairs
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Contents of the Manuals for the R&S ZVAX24 Extension Unit
Service manual - instrument
This service manual for the instrument contains information on checking specs, instrument align-
ment, repairs and troubleshooting. The service manual – instrument contains all the information you
will need to repair the instrument by means of board replacement.
The service manual has four chapters and an annex (Chapter 5) which contains the instrument
documentation:
Chapter 1 Contains all the information you will need to check specs and lists the test equip-
ment required.
Chapter 2 Describes the manual alignment of the frequency and DC measurement accu-
racy, automatic alignment after board replacement and also system error calibra-
tion.
Chapter 3 Describes the instrument design and simple repair and troubleshooting strate-
gies. Board replacement plays a key role.
Chapter 4 Contains information on expansions and modifications achieved by updating in-
strument software and by retrofitting options.
Chapter 5 Describes how to return the instrument and order spare parts. It also contains
spare parts lists and exploded diagrams of the instrument.
Operating manual
The operating manual contains all the information you will need about the technical characteristics of
the instrument, putting the instrument into operation, the basic operating procedures, controls and
displays, menu operation and remote control.
By way of an introduction, typical measurement tasks are explained using menu screen-shots and
program examples.
The operating manual also contains notes on maintenance and explains how to troubleshoot faults
using the warnings and error messages output by the instrument.

R&S ZVAX24 Contents
1312.7979.82 1.1 E-2
Table of Contents - Chapter 1 "Performance Test"
1Performance Test................................................................................................ 1.2
Test Equipment and Accessories ...................................................................................................1.3
Checking the through path transmission loss of PORT 1 source path ...................................................1.4
Checking the through path transmission loss of PORT 3 SOURCE IN to PORT 3 SOURCE OUT........1.4
Checking the through path transmission loss of PORT 2 receiver path .................................................1.5
Option ZVAX-B210 (Port 2 Monitor): Checking the transmission loss....................................................1.5
Option ZVAX-B211 (Combiner): Checking transmission loss and isolation ...........................................1.6
Option ZVAX-B211 (Combiner): Checking the reflection loss of PORT 3 ..............................................1.7
Option ZVAX-B251 (Harmonic Filter Source Port 1): Checking the transmission loss...........................1.7
Option ZVAX-B251 (Harmonic Filter Source Port 1): Checking the harmonic suppression ...................1.8
Option ZVAX-B253 (Harmonic Filter Source Port 3): Checking the transmission loss...........................1.8
Option ZVAX-B253 (Harmonic Filter Source Port 3): Checking the harmonic suppression ...................1.9
Option ZVAX-B252 (Harmonic Filter Receiver Port 2): Checking the transmission loss ......................1.10
Option ZVAX-B252 (Harmonic Filter Receiver Port 2): Checking the fundamental suppression .........1.10
Option ZVAX-B271 (Pulse Modulator Source Port 1): Checking the transmission loss .......................1.11
Option ZVAX-B271 (Pulse Modulator Source Port 1): Checking the pulse modulator function............1.12
Option ZVAX-B273 (Pulse Modulator Source Port 3): Checking the transmission loss .......................1.12
Option ZVAX-B273 (Pulse Modulator Source Port 3): Checking the pulse modulator function............1.13
Option ZVAX-B272 (Pulse Modulator Receiver Port 2): Checking the transmission loss.....................1.14
Option ZVAX-B272 (Pulse Modulator Receiver Port 2): Checking the pulse modulator function .........1.14
Option ZVAX-B291 (High Power Coupler Port 1): Checking the reference channel coupling loss.......1.15
Option ZVAX-B291 (High Power Coupler Port 1): Checking the reference channel isolation ..............1.16
Option ZVAX-B291 (High Power Coupler Port 1): Checking the measurement channel coupling loss 1.16
Option ZVAX-B291 (High Power Coupler Port 1): Checking the measurement channel isolation .......1.17
Option ZVAX-B292 (High Power Coupler Port 2): Checking the transmission loss..............................1.18
Option ZVAX-B292 (High Power Coupler Port 2): Checking the reference channel coupling loss.......1.19
Option ZVAX-B292 (High Power Coupler Port 2): Checking the reference channel isolation ..............1.19
Option ZVAX-B292 (High Power Coupler Port 2): Checking the measurement channel isolation .......1.20
Performance Test Report...............................................................................................................1.21

Test Equipment and Accessories R&S ZVAX24
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1Performance Test
Test Instructions
To ensure that rated specifications are maintained, the following preparations must be made prior to
checking the rated characteristics:
•Unless otherwise specified it is assumed that the R&S ZVAX24 is connected to the R&S ZVA24 USB
cable and Cascade (RJ 45) cable.
•Rated specifications of the R&S ZVAX24 are tested after a warm-up time of at least 1 hour of
R&S ZVA24 and R&S ZVAX24.
•S-Parameters are measured after performing calibrations of the R&S ZVA with test cables at test
ports 1 and 2. This calibration is done with the following settings:
- [ PRESET ]
- [ START : 10 MHz ]
- [ STOP :24 GHz ]
- [ POWER BW AVG : Meas Bandwidth : 1 kHz ]
If test port 2 is female, connect adapter 3.5 mm f-f (item item 4) to the male cable connector
Calibration cal 1 for port 1 source path
(If option R&S ZVAX-B211, -B251, -B271 or -B291 is installed)
R&S ZVAX-B211 installed Y N
R&S ZVAX-B291 installed Y N Y N
Required calibration for test ports 1, 2 m-f, m-m m-m m-f, m-m m-m
Calibration cal 3 for port 3 source path
(If option R&S ZVAX-B253 or -B273 is installed)
Required calibration for test ports 1 and 2 m-m
Calibration cal 2 for port 2 test receiver path
(If option R&S ZVAX-B210, -B252, -B272 or -B292 is installed)
R&S ZVAX-B292 installed Y N
Required calibration for test ports 1 and 2 m-f, m-m m-m
Multiple use of calibrations is possible, cal 1, 2 and 3 may be identical.In the worst case two different
calibrations must be performed (m-m + m-f).
Save calibrations in the cal pool [ MODE : Cal Manager… ].
•Additional uncertainties introduced by the measurement equipment must be taken into account when
checking the rated values
•Values specified in data sheet are guaranteed limits
•Instrument settings required for the measurements are given as follows:
[<KEY>]Press a key on the front panel, e.g. [SPAN]
[<SOFTKEY>] Press a softkey, e.g. [MARKER -> PEAK]
[<nn unit>] Enter a value and terminate by entering the unit, e.g. [12 kHz]
Successive entries are separated by [:], e.g. [ BW : MANUAL RES BW : 3 kHz ]