Rohde & Schwarz R&S OSP-B157W8 User manual

R&S®OSP‑B157W8
R&S®OSP‑B157W8PLUS
R&S®OSP‑B157WX
8-Port Modules for Switch Units
User Manual
User Manual
Version 03
1178579502
(;ÜÇí2)

This document describes the following optional modules for the R&S®OSP switch unit family:
●R&S®OSP-B157W8 (order number 1527.1144.02)
●R&S®OSP-B157W8PLUS (order number 1527.1144.05)
●R&S®OSP-B157WX (order number 1531.4909.02)
Software:
●R&S®RF Test Suite (R&S®EMC32 / R&S®AMS32 / R&S®WMS32), V 10.60 and later
●R&S®OSP Panel, V 02.47 and later
© 2019 Rohde & Schwarz GmbH & Co. KG
Mühldorfstr. 15, 81671 München, Germany
Phone: [phone] - 0
Fax: [phone]
Email: [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.
1178.5795.02 | Version 03 | R&S®OSP‑B157W8 R&S®OSP‑B157W8PLUS R&S®OSP‑B157WX
Throughout this manual, products from Rohde & Schwarz are indicated without the ® symbol , e.g. R&S®OSP is indicated as
R&S OSP.

Contents
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Contents
1 Preface.................................................................................................... 5
2 Documentation Overview......................................................................9
2.1 Getting Started Manual.................................................................................................9
2.2 User Manual...................................................................................................................9
2.3 Operating Manual of the Switch Unit...........................................................................9
2.4 Help................................................................................................................................ 9
2.5 Basic Safety Instructions........................................................................................... 10
2.6 R&S OSP on the Internet............................................................................................ 10
3 Preparing for Use.................................................................................12
3.1 Unpacking and Checking........................................................................................... 12
3.2 Mounting the Base Module........................................................................................ 12
3.3 Mounting the Extension Module................................................................................17
3.4 Installing or Updating the Firmware..........................................................................21
3.5 Putting into Operation................................................................................................ 22
4 Tour of the Base Module..................................................................... 26
4.1 Connecting Devices to the Base Module..................................................................28
5 Tour of the Extension Module.............................................................30
5.1 Connecting Devices and a Base Module to the Extension Module........................31
6 Operating the Modules........................................................................ 34
6.1 Calibration................................................................................................................... 34
6.2 Configuring Devices and Signal Paths..................................................................... 35
6.3 Operation Overview.................................................................................................... 39
6.4 SCPI Commands......................................................................................................... 40
7 Measurements......................................................................................41
8 Remote Control Commands................................................................42
8.1 Common Commands.................................................................................................. 43
8.2 General Setting Commands....................................................................................... 47
8.3 Configuration Setting Commands.............................................................................49
8.4 Measurement Setting Commands............................................................................. 53

Contents
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8.5 Measurement Commands.......................................................................................... 59
8.6 Sum-Power Detector Commands.............................................................................. 62
8.7 List of Commands.......................................................................................................65
9 Maintenance......................................................................................... 68
9.1 Replacing the Power Supply Fuses.......................................................................... 68
9.2 Cleaning....................................................................................................................... 69
9.3 Storing and Packing................................................................................................... 70
10 Troubleshooting................................................................................... 71
10.1 Status LEDs................................................................................................................. 71
10.2 Resolving Network Connection Failures.................................................................. 71
Glossary: Abbreviations......................................................................73
Index......................................................................................................76

Preface
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1 Preface
The R&S OSP-B157W8 or R&S OSP-B157W8PLUS and R&S OSP-B157WX are stan-
dard modules for the open switch platform R&S OSP.
The R&S OSP-B157WX serves as a frequency extension for the base module
R&S OSP-B157W8 or R&S OSP-B157W8PLUS. While the extension forwards lower
frequency signals to the base module, it can bypass higher frequency signals to an
appropriate measurement channel.
Both modules are typically used in the automatic test system R&S TS8997 that per-
forms regulatory conformance tests of wireless short range devices (SRDs). The tests
cases are focused on the 2.4 GHz and 5 GHz frequency bands for Wi-Fi and ISM
applications (industrial, scientific and medical). These tests are performed according to
the standards FCC 15.407, ETSI EN 300 328, ETSI EN 301 893, ETSI EN 302 502,
ETSI EN 300 440 and others.
Intended use
The R&S OSP-B157W8, R&S OSP-B157W8PLUS and R&S OSP-B157WX are desig-
nated for the development, production and verification of electronic components and
devices in industrial and laboratory environments. Use the modules only for their desig-
nated purpose. Observe the operating conditions and performance limits stated in the
data sheets.
Designation "module" vs. "switch unit"
This manual uses the following nomenclature:
●The R&S OSP-B157W8 is referred to as "base module".
●The R&S OSP-B157W8PLUS is referred to as "base module".
●The R&S OSP-B157WX is referred to as "extension module".
●The R&S OSP is referred to as "switch unit".
Integration
●The base module R&S OSP-B157W8 or R&S OSP-B157W8PLUS is (or must be)
integrated in an R&S OSP150 or R&S OSP120 switch unit.
●The extension module R&S OSP-B157WX is (or must be) integrated in an
R&S OSP120 switch unit (not in an R&S OSP150).
Except for one optional additional single-slot module in slot A11 of the switch unit, no
additional modules can be installed in a single switch unit beside one R&S OSP-
B157W8, one R&S OSP-B157W8PLUS or one R&S OSP-B157WX. For all information
related to the R&S OSP switch units, refer to their operating manual.

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Frequency ranges
Basically, the modules are designed to cover the 2.4 GHz and 5 GHz frequency bands.
However, some of the above mentioned regulatory ETSI and FCC tests include mea-
suring spurious emissions up to 18 GHz or even up to 40 GHz.
Therefore, the frequency coverage of the modules is as follows:
●The R&S OSP-B157W8 operates in a frequency range up to 6 GHz. The
R&S OSP-B157W8PLUS operates in a frequency range up to 7.5 GHz. Both base
modules offer a special by-path for spurious emissions measurements up to
18 GHz. The integrated power meter and signal conditioning is designed for in-
band use only.
The lower end of the frequency range of the R&S OSP-B157W8 and R&S OSP-
B157W8PLUS depends on the selected paths and application. It starts, for exam-
ple, approximately at 100 MHz, if internal power measurements are involved, or
approximately at 1 GHz, if directional couplers are involved.
●The R&S OSP-B157WX extends the spurious emissions frequency range up to
40 GHz. Signals to be measured in this frequency range are not forwarded to the
DUT input ports of the base module, but bypassed directly to the signal analyzer.
Key features of the base module R&S OSP-B157W8
The 6 GHz module R&S OSP-B157W8 with up to 8 channels is based on a printed RF
switch board in solid-state relay (SSR) architecture. It allows flexible operation of the
connected DUT (up to 8 ports) and measurement instruments.
The module features:
●Signal conditioning by integrated attenuators, couplers and combiners (without
amplifiers or filters)
●RF switching for wireless test cases up to 6 GHz
●RF switching for spurious emission measurements up to 18 GHz (exception: if a
frequency extension module R&S OSP-B157WX is present, these signals are han-
dled within the extension module)
●Power measurements in the 2.4 GHz and 5 GHz bands with specific evaluations
for wireless standards
●Built-in data acquisition board for control of the signal paths and for collection and
A/D conversion of the power measurements
●Multiple trigger input and output options
●External clock input
●Video input
●LAN interface for remote control of the module operation by the test software
R&S WMS32
Key features of the base module R&S OSP-B157W8PLUS
In addition to the features of the ".02" version R&S OSP-B157W8, the ".05" version of
the module features:
●Frequency range for signalling up to 7.5 GHz

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●Additional step attenuator R2 for an extended attenuation range, see Figure 4-3
Each of the 8 configurable channels in the R&S OSP-B157W8 and R&S OSP-
B157W8PLUS has the following integrated semiconductor components:
●An individually programmable attenuator
●An analog power detector for synchronous RMS power measurement with high
sampling rate and burst detection
●An A/D converter for the power measurement results
●Solid-state switches, which enable:
– Switching the (vector) signal generator output to the calibration port or to the
DUT ports
– Switching the measurement paths from DUT ports to a spectrum analyzer / test
receiver or to the power measurement
– Signal conditioning via the integrated couplers, directional couplers, attenuators
and combiners
Key features of the frequency extension module R&S OSP-B157WX
The 40 GHz module R&S OSP-B157WX is especially designed to provide RF switch-
ing for spurious measurements up to 40 GHz.
It uses coaxial RF architecture and features:
●Electromechanical RF relay switches for flexible operation of up to 8 DUT channels
●The module can forward incoming signals on each DUT channel to the connected
DUT input of the R&S OSP-B157W8 or R&S OSP-B157W8PLUS. This forwarding
is used for measurements at frequencies up to 6 GHz, which the R&S OSP-
B157W8 can handle, or up to 7.5 GHz, which the R&S OSP-B157W8PLUS can
handle.
●Alternatively, incoming signals on one single DUT channel can be switched to the
module's [Rx] port and on to a connected signal analyzer, receiver or other mea-
surement instrument. This switching state is typically used for measurements at
frequencies above 6 GHz or 7.5 GHz and up to 40 GHz, which the base modules
cannot handle. (Signals for spurious emission measurements up to 18 GHz are
also switched to the instrument connected to the extension module's [Rx] port.)
●If the R&S OSP-B157WX forwards the DUT's signals, it also switches the signal
analyzer path from its [RxOUT] port (input port) to its [Rx] port. This [Rx] port is
connected to the signal analyzer or test receiver, while the [Rx] port of the
R&S OSP-B157W8 or R&S OSP-B157W8PLUS is connected to the [RxOUT] port
(input port) of the R&S OSP-B157WX.
●Additionally, you can add the signal of a companion device to one of the DUT paths
via its internal switches and a directional coupler. The type of companion device
depends on the DUT. For example, if your DUT is a Wi-Fi transceiver, the compan-
ion device can be a wideband radiocommunication tester R&S CMW500. In this
example, it would simulate a wireless router that maintains a bidirectional connec-
tion with the transceiver.

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Screenshots
Sample screenshots in this documentation are used to illustrate as much as possible of
the functions provided by the modules and of potential interdependencies between
parameters. Note that:
●The values in these screenshots do not necessarily represent realistic application
situations.
●Do not consider the values as recommended by Rohde & Schwarz.
●The screenshots shown can differ, depending on your particular equipment and
configuration.

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2 Documentation Overview
This section provides an overview of the R&S OSP-B157W8, R&S OSP-B157W8PLUS
and R&S OSP-B157WX user documentation. Unless specified otherwise, you find the
documents on the R&S OSP product page at:
www.rohde-schwarz.com/manual/osp
2.1 Getting Started Manual
Introduces the modules and describes how to set up and start working with them.
Includes safety instructions, key features, preparation, mounting, setup and basic oper-
ation. A printed version is delivered with the modules.
2.2 User Manual
Contains the description of all functions of the modules. It includes the contents of the
getting started manual and provides explanations, step-by-step procedures, figures
and examples. The user manual supports you during your first experience with the
product, from installation and configuration to various measurements. The content also
provides an introduction to remote control, a complete description of the remote control
commands with programming examples, and information on maintenance, instrument
interfaces and error messages.
The user manual is available for download or for immediate display on the Internet.
2.3 Operating Manual of the Switch Unit
Contains the description of all instrument modes and functions of the R&S OSP Open
Switch and Control Platform (switch unit). It is available for download on the Internet.
2.4 Help
The R&S OSP-B157W8 and R&S OSP-B157W8PLUS are operated either by direct
bus commands or by the software R&S WMS32, which is part of the R&S RF Test
Suite. The R&S OSP-B157WX can also be operated by the software R&S OSP Panel.
The software-embedded help content in the R&S RF Test Suite provides quick, con-
text-sensitive access to information for the software packages R&S EMC32,
R&S AMS32 and R&S WMS32. Refer to the R&S WMS32 part of this help content for
application of the modules and switch units in the R&S TS8997 test system. The help
content also describes templates for test cases that you can use in tests according to
Help

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various FCC and ETSI standards. Examples are FCC 15.407, ETSI EN 300 328 or
ETSI EN 301 893.
The software, which requires a license, is available at www.rohde-schwarz.com/soft-
ware/emc32.
2.5 Basic Safety Instructions
Contains safety instructions, operating conditions and further important information.
The printed document is delivered with the switch unit.
2.6 R&S OSP on the Internet
The website www.rohde-schwarz.com/product/osp provides:
●Key facts, features and options for the family of R&S OSP switch units
●Rohde & Schwarz contacts for information, quotes, demos and calibration services
●Technical documentation (operating manual for R&S OSP switch units)
●Brochures and Data Sheets
●Application Notes
●Drivers
●The current firmware version with OSA and release notes
●The R&S OSP Panel software with release notes
●Related documents and articles
●News and information on software updates
●Service Manual (only for registered users)
For operation of the modules, refer to the documentation of the R&S WMS32 software.
The documentation is available as a help function in the R&S RF Test Suite, which
requires a license and comprises the software packages R&S EMC32, R&S AMS32
and R&S WMS32. Also, refer to the related release notes.
2.6.1 Brochures and Data Sheets
The data sheet contains the technical specifications of the R&S OSP. It also lists the
options and their order numbers, and optional accessories.
The brochure provides an overview of the instrument and deals with the specific char-
acteristics.
See www.rohde-schwarz.com/brochure-datasheet/osp.
R&S OSP on the Internet

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2.6.2 Application Notes
Application notes and application cards deal with special applications or background
information on particular topics.
See www.rohde-schwarz.com/application/osp.
2.6.3 Drivers
Up-to-date instrument drivers are available for download.
See www.rohde-schwarz.com/driver/osp.
2.6.4 Release Notes and Open Source Acknowledgment (OSA)
The release notes list new features, improvements and known issues of the current
firmware or software version and describe the installation.
The open source acknowledgment document provides verbatim license texts of the
used open source software.
See www.rohde-schwarz.com/firmware/osp and www.rohde-schwarz.com/software/
osp.
2.6.5 Service Manual
Describes handling failed modules, module replacement, troubleshooting and special
remote control commands for service purposes. The document also contains spare
part lists and mechanical drawings.
The service manual ("Classified Service Document") is available for Rohde & Schwarz
personnel, only.
R&S OSP on the Internet

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3 Preparing for Use
●Unpacking and Checking........................................................................................ 12
●Mounting the Base Module..................................................................................... 12
●Mounting the Extension Module..............................................................................17
●Installing or Updating the Firmware........................................................................ 21
●Putting into Operation............................................................................................. 22
3.1 Unpacking and Checking
If your delivery includes a module that is not mounted in a switch unit, be especially
careful with unpacking the module, which is not protected in a casing.
Check the delivery for completeness according to the included shipment list. If the
delivery is incomplete, contact Rohde & Schwarz.
Retain the original packing material. If the instrument needs to be transported or ship-
ped later, you can use the material to protect the control elements and connectors.
Mounting modules into switch units
●If you have received one or more modules that are already integrated in switch
units, you can skip the chapters Mounting the Base Module and Mounting the
Extension Module. Proceed with Chapter 3.5, "Putting into Operation",
on page 22.
●If you have received one or more modules that are not yet integrated in switch
units, proceed with chapters Mounting the Base Module and Mounting the Exten-
sion Module.
3.2 Mounting the Base Module
Mounting the base module R&S OSP-B157W8 or R&S OSP-B157W8PLUS into an
R&S OSP150 or R&S OSP120 switch unit requires the space of two slots: rear slots
A12 and A13 together with front slots A12F and A13F. Typically, the rear slot A11
remains free, but optionally it can remain occupied by a single-slot module (not opera-
tional). Only one base module fits into one R&S OSP150 or R&S OSP120 switch unit.
Mounting the Base Module

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Risk of electric shock
Opening a switch unit implies the risk of touching current-carrying components and suf-
fering an electric shock, if the device is not properly disconnected from grid power.
Before opening the casing, ensure that the switch unit is disconnected from the power
supply by removing the plug from the rear AC power connector.
Observe the safety instructions for units with a removable casing.
Carefully follow the step-by-step instructions for module replacement to avoid injury
and to help ensure safe operation.
Risk of injuries
When removing the rear feet, the switch unit can slip out of its casing.
To avoid the risk of personal injuries and any damage, put the switch unit onto its front
handles before removing the rear feet and taking off the casing.
When mounting the casing back onto the switch unit, take care not to pinch your fin-
gers. Also pay attention not to damage or pull off protruding parts, especially cables.
Screw the rear feet back on immediately after mounting the casing. Do not move the
switch unit with the rear feet missing.
Removing an existing (old) R&S OSP-B157 module
If you want to install the R&S OSP-B157W8 or R&S OSP-B157W8PLUS in a switch
unit, which is occupied by an existing module (for example R&S OSP-B157), first
remove the existing module.
Remove the existing module in the reverse order of the mounting procedure, described
in the service manual of the R&S OSP (1505.3896.82), for example chapter "Replacing
the Option OSP-B157".
Mounting procedure for the R&S OSP-B157W8 or R&S OSP-B157W8PLUS
For mounting the module into an R&S OSP150 or R&S OSP120 switch unit:
1. Turn off the switch unit.
Mounting the Base Module

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2. Unplug the power supply cable.
3. Disconnect all other cables, too.
4. If the switch unit holds any modules, remove these modules and their ribbon
cables, except for a module in the rear slot A11.
5. If the rear slot A11 of the switch unit holds a module, we recommend removing it.
(Optionally you can leave it there, but you cannot operate it due to missing control
interfaces.)
6. If you have removed a module from rear slot A11, close the open slot with a blind
plate, using the same screws that fixed the module.
7. If blind plates cover unused front slots A12F or A13F of the switch unit, remove
these blind plates.
8. If blind plates cover unused rear slots A12 or A13 of the switch unit, remove these
blind plates.
9. If a blind plate covers an unused rear slot A11 of the switch unit, leave it there.
10. Place the switch unit on its front handles.
11. Optionally, if at the switch unit's feet there are yellow stickers that you want to save,
remove the blue rubber bumpers from the feet.
12. Screw off the switch unit's feet.
Removing these screws releases the switch unit's casing.
13. Push the switch unit's casing upwards.
14. Remove the casing from the switch unit.
15. Lay down the switch unit, with its open side facing upwards.
16. Unplug the CAN bus cable (W3) from connector X8 on the switch unit's main board
and from the CAN connector on the switch unit's rear panel.
17. Remove the CAN connector from the switch unit's rear panel.
18. If your switch unit is an R&S OSP120:
● Unplug the LAN cable (W4) from the RJ45 connector on the processor board
and from the LAN connector on the switch unit's rear panel.
● Remove the LAN connector from the switch unit's rear panel.
19. Remove the cable holder of the CAN (and LAN) cable.
20. Remove the rear panel strut between slot A12 and slot A13.
21. Screw the rear plate of the module to the switch unit's rear panel (10 countersunk
screws, type Torx M2.5x8, included in the delivery; step 34 uses 3 more of these
screws).
22. Insert the guide cage into the switch unit's free space, with the protruding flange
(item (2) in Figure 3-1) directed towards the switch unit's power supply and control
board, as in Figure 3-3.
Mounting the Base Module

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Figure 3-1: Guide cage for holding the module in the switch unit
1 = 2 holes for accessing 2 screw hole positions below
2 = Protruding flange
3 = 3 screw holes
4 = Guiding structure elements, into which you slide the module in step 26
23. Screw the guide cage to the switch unit's base plate (5 cylinder-head screws, type
Torx M2.5x6, included in the delivery), items (1) and (3) in Figure 3-1 or (5) and (6)
in Figure 3-3.
24. Connect the 4-pole connector at the short end of cable W20 (4 wires, red/black/
black/gray) to the power input connector X201 of the module's RF board, item (9)
in Figure 3-3.
25. Connect the 4-pole connector at the long end of cable W20 (2 wires, brown/black)
to the power input connector X203 of the module's data acquisition board, item (10)
in Figure 3-3.
26. In the open front panel of the switch unit, place the module's rear end just into the
guiding structure elements of the guide cage, as shown in Figure 3-3.
Figure 3-2: Placing the base module in the opened switch unit, before inserting it
27. Do not yet insert the module into the switch unit.
Mounting the Base Module

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28. Insert the single end of cable W20 (with the 12-pole connector) through the open
front panel of the switch unit while passing the guide cage on its right-hand
side.
As a result, the cable enters the switch unit through a narrow gap between the front
panel and the guide cage.
29. Connect the 12-pole connector of cable W20 to connector X12 on the switch unit's
control board, item (8) in Figure 3-3.
30. Push the module 80% of its length into the switch unit.
31. Fix the middle part of cable W20 by using the cable holder close to the front of the
switch unit, item (11) in Figure 3-3.
32. Push the module all the way into the switch unit, until the module's cover panel is
level with the switch unit (item (2) in Figure 3-3).
Figure 3-3: Opened switch unit with guide cage mounted and base module inserted
1 = Guide cage, mounted in the switch unit
2 = Front plate of the inserted module
3 = Rear end of the inserted module
4 = Secondary power cable for the control board, already existing in the switch unit
5 = 2 screws that you can reach through holes in the upper plate of the guide cage, fixing its left side
6 = 3 screws, fixing the protruding flange at the right side of the guide cage (underneath the secondary
power cable)
7 = Cable W20 (here shown as partly visible through the guide cage)
8 = 12-pole connector of cable W20, connected to connector X12 of the switch unit's control board
9 = 4-pole connector at the short end of cable W20 (4 wires), plugged into connector X201 on the
module's RF board (see detail at left-hand side)
10 = 4-pole connector at the long end of cable W20 (2 wires), plugged into connector X203 on the mod-
ule's data acquisition board
Mounting the Base Module

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11 = Cable holder for fixing cable W20
12 = Detail: identifying the connector for the short end (9) of cable W20
13 = Detail: view from the front of the switch unit (front panel not shown) through the empty guide cage
towards the rear panel
33. Screw the module's front plate to the switch unit's front panel (10 countersunk
screws, type Torx M2.5x6, included in the delivery).
34. Screw the module's rear plate, which you have already attached to the switch unit's
rear panel (step 21), to the module (3 countersunk screws, type Torx M2.5x8, inclu-
ded in the delivery).
35. Place the switch unit on its front handles.
36. Shift the casing over the unit.
37. Push the switch unit's casing down to the stop.
38. Screw on the switch unit's feet.
Tightening these screws fixes the switch unit's casing to the unit.
39. If you have removed the blue rubber bumpers from the switch unit's feet, reattach
them.
40. Lay down the unit.
41. Reconnect the power cable to the unit.
3.3 Mounting the Extension Module
Mounting the frequency extrension module R&S OSP-B157WX into an R&S OSP120
switch unit requires the space of two slots: rear slots A12 and A13 together with front
slots A12F and A13F. Typically, the rear slot A11 remains free, but optionally it can
remain occupied by a single-slot module (not operational). Only one R&S OSP-
B157WX module fits into one R&S OSP120 switch unit.
Risk of electric shock
Opening a switch unit implies the risk of touching current-carrying components and suf-
fering an electric shock, if the device is not properly disconnected from grid power.
Before opening the casing, ensure that the switch unit is disconnected from the power
supply by removing the plug from the rear AC power connector.
Observe the safety instructions for units with a removable casing.
Carefully follow the step-by-step instructions for module replacement to avoid injury
and to help ensure safe operation.
Mounting the Extension Module

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Risk of injuries
When removing the rear feet, the switch unit can slip out of its casing.
To avoid the risk of personal injuries and any damage, put the switch unit onto its front
handles before removing the rear feet and taking off the casing.
When mounting the casing back onto the switch unit, take care not to pinch your fin-
gers. Also pay attention not to damage or pull off protruding parts, especially cables.
Screw the rear feet back on immediately after mounting the casing. Do not move the
switch unit with the rear feet missing.
Removing an existing (old) R&S OSP-B157 module
If you want to install the R&S OSP-B157WX in a switch unit, which is occupied by an
existing module (for example R&S OSP-B157), first remove the existing module.
Remove the existing module in the reverse order of the mounting procedure, described
in the service manual of the R&S OSP (1505.3896.82), for example chapter "Replacing
the Option OSP-B157".
Mounting procedure for the R&S OSP-B157WX
For mounting the module into an R&S OSP120 switch unit:
1. Turn off the switch unit.
2. Unplug the power supply cable.
3. Disconnect all other cables, too.
4. If the switch unit holds any modules, remove these modules and their ribbon
cables, except for a module in the rear slot A11.
5. If the rear slot A11 of the switch unit holds a module, we recommend removing it.
(Optionally you can leave it there, but you cannot operate it due to missing control
interfaces.)
6. If you have removed a module from rear slot A11, close the open slot with a blind
plate, using the same screws that fixed the module.
7. If a blind plate covers the unused rear slot A11 of the switch unit, leave it there.
Mounting the Extension Module

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8. If you have removed one or two modules from rear slots A12 or A13, close the
open slots with blind plates, using the same screws that fixed the modules.
9. If blind plates cover unused rear slots A12 or A13 of the switch unit, leave them
there.
10. If blind plates cover unused front slots A12F or A13F of the switch unit, remove
these blind plates.
11. Place the switch unit on its front handles.
12. Optionally, if at the switch unit's feet there are yellow stickers that you want to save,
remove the blue rubber bumpers from the feet.
13. Screw off the switch unit's feet.
Removing these screws releases the switch unit's casing.
14. Push the switch unit's casing upwards.
15. Remove the casing from the switch unit.
16. Lay down the switch unit, with its open side facing upwards.
17. Unplug the CAN bus cable (W3) from connector X8 on the switch unit's main
board, but not from the CAN connector on the switch unit's rear panel.
18. Unplug the LAN cable (W4) from the RJ45 connector on the processor board, but
not from the LAN connector on the switch unit's rear panel.
19. Remove the cable holder of the CAN and LAN cable.
20. Screw the adapter plate (item (1) in Figure 3-4), which comes separately, to the
base plate of the switch unit (12 cylinder-head screws, type Torx M2.5x6, included
in the delivery).
Figure 3-4: Overview of the parts for the fixation of module R&S
OSP-B157WX
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1 = Adapter plate with 11 threaded insert nuts (dark gray) and 12 screws (yellow) that fix the adapter
plate to the base plate of the switch unit
2 = Ground plate of the module, here in an isolated presentation for better view of the 11 screws (yel-
low) that fix the module to the adapter plate
3 = Top view of the complete module with the same 11 screws highlighted as in the isolated presenta-
tion (2)
21. Insert the module into the switch unit from the front side (item (3) in Figure 3-5).
Figure 3-5: Inserting the module R&S OSP-B157WX
1 = 12 screws that fix the adapter plate to the base plate of the switch unit
2 = 11 threaded insert nuts that carry the module
3 = Inserting the module
4 = 11 screws that fix the module's ground plate to the adapter plate
5 = 10 countersunk screws that fix the module's cover panel to the front panel of the switch unit
22. Push the module all the way into the switch unit, until the module's cover panel is
level with the switch unit.
23. Screw the ground plate (item (2) and (3) in Figure 3-4) to the adapter plate (11 cyl-
inder-head screws, type Torx M2.5x6, included in the delivery).
24. Screw the module's front plate to the switch unit's front panel (item (5) in Fig-
ure 3-5, 10 countersunk screws, type Torx M2.5x6, included in the delivery).
25. Connect the cables (included in the delivery) as follows between the interface
board of the module R&S OSP-B157WX and the main board of the switch unit:
Interface board connector Cable Main board connector
X15 (power input) 6-wire cable X12 (power supply)
X13 (interface slot A12) 26-pin ribbon cable X4 (interface slot A12)
X19 (interface slot A13) 26-pin ribbon cable X13 (interface slot A13)
Mounting the Extension Module