Rohde & Schwarz AMU200A, AFQ100B, CMW270, CMW280, CMW500 Application Note

Remote Operation of Windows
Based T&M Instruments with
Android Tablets

Application Note

Products

| R&S



AFQ100B

| R&S



AMU200A

| R&S



CMW270/280/500

| R&S



ESR

| R&S



ESRP

| R&S



FSL

| R&S



FSV

| R&S



FSVR

| R&S



FSQ

| R&S



FSW

| R&S



SMATE200A

| R&S



SMJ100A

| R&S



SMU200A

| R&S



UPP

| R&S



UPV

| R&S



ZNB

| R&S



ZVA

| R&S



ZVL

This document describes how a Windows®­based R&S® T&M instrument is remotely op­erated by an AndroidTM tablet as if working on
it locally. Step-by-step procedures are pro­vided for setting up and configuring the T&M
instrument and the tablet.
On the tablet, a special App implements the
Windows® "Remote Desktop" functionality.
T&M instrument and tablet are connected via
WLAN (also called Wi-Fi network).

Application Note

Klaus Lienhart

07.2013 – 1MA236_0e

Table of Contents

1MA236_0e Rohde & Schwarz Remote Operation of Windows Based T&M Instruments with Android Tablets 2

Table of Contents

1 Introduction ............................................................................ 3

2 Functional Description .......................................................... 4

3 Setup ....................................................................................... 5

3.1 Providing WLAN Access for the T&M Instrument ..................................... 6

3.1.1 WLAN Connection via WLAN Router ......................................................... 6

3.1.2 WLAN Connection via WLAN USB Adapter ............................................... 7

3.1.2.1 Installation for Windows XP T&M Instruments ......................................... 8

3.1.2.2 Installation for Windows 7 T&M Instruments ..........................................11

3.2 Installing the RDP Client Application on the Tablet ...............................13

3.3 Establishing the WLAN Connection on the Tablet .................................13

3.4 Establishing the RDP Connection ............................................................14

4 Operation .............................................................................. 17

4.1 Locking the Tablet's Screen Rotation Function ......................................17

4.2 Controlling the T&M Instrument via RDP .................................................17

4.2.1 Operation via Virtual Mouse and Keyboard .............................................17

4.2.2 Control Elements of the T&M Instrument Views .....................................18

4.2.3 Starting a Firmware Application on a CMW .............................................20

4.3 Disconnecting from the T&M Instrument .................................................20

5 Related Documents .............................................................. 22

6 References ............................................................................ 22

Introduction

1MA236_0e Rohde & Schwarz Remote Operation of Windows Based T&M Instruments with Android Tablets 3

1 Introduction

Tablet computers, or simply "tablets", provide easy mobile access to networks while
offering a very good usability, especially regarding display, size, weight and handling.
Sometimes tablets replace notebooks, sometimes they open new applications. In­creasingly, tablets have proven their capabilities in business areas.

Remote operation of Windows®-based Test & Measurement (T&M) instruments1 is
done mainly from desktop computers, sometimes via notebooks. Tablets are also very
appropriate since they satisfy all requirements for remote control of T&M instruments
which are:

● A display for monitoring the ongoing operations and providing buttons and other
interactive GUI elements

● An interface to press the buttons, select or enter values, launch actions etc.

● The capability to access the network (a LAN or WLAN) with the T&M instrument

Typically, remote operation requires only the computing capacity of a modest client
application (while the main computing takes place on the T&M instrument) and only a
minimum of manual entries of numbers and letters.

The following descriptions refer to tablets with the Android2 operating system. The
same considerations are valid for the Apple® iPad® (see application note 1MA216).
Procedures and handling for Windows RT tablets are similar.

The R&S CMW270/280/5003 is used as example for a typical R&S T&M instrument.
The front page lists other R&S instruments that may be operated as described in this
document.

Use Cases

● Monitoring the T&M instrument outside the usual control room

● Presenting the operation of a T&M instrument in a meeting/teaching room

● Accessing T&M instruments without dedicated displays or instruments which have

been installed in places that are difficult to reach

Implementation Principle

Remote operation by tablet is adopted for T&M instruments running on Windows XP or
Windows 7. An App implements the common Windows "Remote Desktop" functionality
on the tablet. "Remote Desktop" is the standard mechanism for remote control of Win­dows-based T&M instruments by a desktop computer. It allows to control the T&M in­strument remotely as if working on it locally.
For accessing the T&M instrument from the tablet a WLAN connection is required. This
wireless connection can be established e.g. via a WLAN router between T&M instru­ment and tablet or even directly between both devices if the instrument is equipped
with a WLAN USB adapter.

1

Supported Windows-based R&S products are referred to as "T&M instruments".

2

Android is a trademark of Google Inc.

3

The R&S CMW270/280/500 is referred to as "CMW" in this document.

Functional Description

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2 Functional Description

The "Remote Desktop" functionality for controlling the T&M instrument by tablet com­prises the following main characteristics:

● The T&M instrument acts as server and generates content which is transmitted to
the tablet and shown on its display; the tablet is the client. The display of the tablet
shows the same content as a T&M instrument's display would do.

● In the opposite direction, the tablet transmits commands from its user interface
(touch screen) to the T&M instrument which determine its behaviour.

● An appropriate protocol controls the data exchange between T&M instrument and
tablet.

The "Remote Desktop" functionality is realized by Microsoft's Remote Desktop Protocol
(RDP). The RDP software consists of a server and a client component. On Windows
systems the server and client components are included in the Windows operating sys­tem. Thus, the T&M instrument operating on Windows is ready for RDP. On the tablet,
RDP client software which is appropriate for the client's operating system has to be
installed.

VNC (Virtual Network Computing) is an alternative to RDP. VNC also allows to control
a T&M instrument from a remote computer as if working on the instrument locally. It
uses similar concepts as RDP but is independent of the operating system.

WLAN Connection

WLAN is used for the wireless connection between T&M instrument and tablet.
Fig. 1 illustrates one possible realization with an intermediate WLAN router.

Fig. 1: T&M instrument connected with tablet via WLAN router

Setup

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For providing the T&M instrument with WLAN access, the following solutions are pos­sible:

● The T&M instrument is connected by (hardwire) Ethernet with a WLAN router.
In this case the tablet will wirelessly connect to the WLAN router and access the
T&M instrument from there. A group of T&M instruments can use the same WLAN
router. This connection type is called infrastructure mode: The WLAN router acts
as WLAN access point which provides the T&M instrument with information to es­tablish the WLAN connection.
It is recommended to apply DHCP (Dynamic Host Configuration Protocol) on the
WLAN router whereby all address information of the T&M instrument is automati­cally assigned. Most T&M instruments use DHCP by default.

● The T&M instrument is connected by Ethernet with a network providing wireless
connectivity. In this case the tablet will wirelessly connect to the T&M instrument
via any dedicated WLAN access point provided by the network.
This case is not described in the following sections since configurations and opera­tion are very similar to the previous case.

● The T&M instrument is equipped with a WLAN USB adapter.
In this case the T&M instrument sets up an own wireless network and the tablet
connects to this network. The devices communicate directly with each other (point­to-point); no additional WLAN access point is engaged and the T&M instrument is
not available at other WLAN access points. This is the WLAN ad hoc mode. Static
address information (no DHCP) is used for the T&M instrument and the tablet. The
connection only has to be configured once, the settings are saved.
A WLAN USB adapter has a range of about 10 m.

Note: WLAN connections with several WLAN USB adapters in near vicinity would
disturb each other.

For a T&M instrument with WLAN USB adapter, the WLAN infrastructure mode
would also be possible. In infrastructure mode the WLAN USB adapter operates as
a bridge to another WLAN access point (with greater coverage area) and the tablet
connects to the access point. The infrastructure mode with USB adapter is useful if
the distance between controlling tablet and T&M instrument exceeds 10 m.

Note: A WLAN connection is not as stable as a LAN connection, and sporadic disturb­ances of the WLAN connection can occur depending on the local conditions.

3 Setup

The setup consists of:

1. Providing WLAN access for the T&M instrument; this can be done in different ways

2. Installing the RDP client App on the tablet

3. Establishing the WLAN connection on the tablet

4. Establishing the RDP connection

Setup

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3.1 Providing WLAN Access for the T&M Instrument

Instructions are given for the following solutions:

● WLAN connection via WLAN router (WLAN infrastructure mode)

● WLAN connection via WLAN USB adapter (WLAN adhoc mode) which the T&M

instrument is equipped with.

3.1.1 WLAN Connection via WLAN Router

Many WLAN routers are appropriate, e.g. the DIR-635 WLAN router from D-Link, see
[1]. The following descriptions merely show the basic line of configuration tasks. Most
default settings can be kept. Please refer to the vendor's user manual for details.

1 Access the WLAN Router

An IP connection, e.g. via modem, and a desktop computer (or notebook) are required
for accessing and configuring the D-Link WLAN router.

● Plug a RJ-45 cable into the Internet port of the router and the other end of the ca­ble into the modem which the desktop computer is also connected to.

● Turn on the WLAN router.

● Turn on the desktop computer.

● On the desktop computer, open a web browser such as the Internet Explorer and

enter the IP address of the router. Then log in as described in the router's manual.
Note: It is even possible to directly access the WLAN router via tablet if both have
Internet access.

2 Configure the WLAN Router

It is assumed that the WLAN router provides a DHCP server.

● Configure the network parameters:

 Keep the router's IP address and the subnet mask.
 DHCP server: Enabled

The WLAN router automatically assigns an IP address and related parameters
to the T&M instrument.
(In case you have disabled the WLAN router's DHCP server and no other
DHCP server is involved, you have to disable/uncheck DHCP at the T&M in­strument and the tablet; in this case you can manually change the static ad­dress information at the T&M instrument.)

● Configure the wireless LAN parameters:
 Wireless network name (SSID, Service Set Identifier):

Create a name using up to 32 characters or keep the default name.
This network name will appear in the list of Wi-Fi networks on the tablet.

 Wireless channel: e.g. "6"

Attention: Take care that the WLAN channel does not overlap with any
measurement frequency. Otherwise the measurement can be disturbed.

 802.11 mode: e.g. "Mixed 802.11n, 802.11b, and 802.11g"
 Channel width: e.g. "Auto"
 Transmission rate: e.g. "Auto"

● Configure the wireless security:

 Security mode: e.g. "WPA-Personal"

Note: Configuration of the Internet parameters is not required, so simply skip the relat­ed configuration windows.

Setup

1MA236_0e Rohde & Schwarz Remote Operation of Windows Based T&M Instruments with Android Tablets 7

3 Connect the T&M instrument with the WLAN Router

It is assumed that the instrument is not connected with another router or DHCP server.

● Connect a RJ-45 cable to a LAN port of the T&M instrument.

● Connect the other end of the cable to a WLAN router's LAN port.

Note: In this way, you can connect several T&M instruments with the WLAN router.

3.1.2 WLAN Connection via WLAN USB Adapter

Static T&M instrument address information and the WLAN adhoc mode are applied.

Fig. 2: Connecting a WLAN USB adapter to an R&S T&M instrument

Note: The WLAN signals from the WLAN USB adapter can disturb measurements with
very low RX levels, e.g. sensitivity measurements. USB connectors on the rear of the
T&M instrument cause less interference due to the larger distance to its RX unit.

First Commissioning

Some installation and configuration steps are required. These steps are described in
the following sections.

Prerequisites for the First Commissioning:

● A T&M instrument with display or a remote desktop connection between the T&M
instrument and a desktop computer (or notebook) is required.

● Keep the desired WLAN network name (SSID), encryption mode and password for
network access at hand.

Further Starts of Operation

The configurations of the first commissioning are kept. So simply proceed as follows:

● Insert the WLAN USB adapter into an empty USB port of the running T&M instru­ment. The WLAN USB adapter gets active according to the stored configuration.

Note: The drives, directories and paths in the following descriptions are examples and
depend on the type of T&M instrument.

Setup

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3.1.2.1 Installation for Windows XP T&M Instruments

1 Install the WLAN USB Adapter

Many WLAN USB adapters are appropriate. Rohde & Schwarz uses the LogiLink
WL0049A as example device. A driver for the WLAN USB adapter is required.
Proceed as follows:
A) The driver is taken from the .zip package provided together with this application
note.

1. Unzip the .zip package (e.g. "SupplementaryFiles.zip") and copy the "…Setup.exe"
file onto the running T&M instrument (e.g. into the folder "C:\Temp\").

2. Execute the .exe file.

3. Accept the License Agreement.

4. Select the "Install driver only" option.

5. Close the installer program after the installation has completed successfully.

6. Insert the WLAN USB adapter into an empty USB port of the T&M instrument. You
can use any of its USB ports.

If the driver file is not automatically found after plugging in the WLAN USB adapter, a
"Files Needed" window is displayed (e.g. asking for the "rt2870.sys" file). Here, you can
manually enter the correct path for driver files: "C:\windows\system32\DRVSTORE\...\".

Fig. 3: "Files Needed" window

B) The T&M instrument has a CD/DVD drive and the driver is available on CD/DVD as
supplement of the WLAN USB adapter.

1. Insert the WLAN USB adapter into an empty USB port of the running T&M instru­ment.
Windows detects that new hardware has been added and starts the "Found New
Hardware" dialog. Click on "Cancel".

2. Install the driver for the WLAN USB adapter from the CD/DVD according to the
instructions of the vendor of the adapter (insert the CD, after start of the driver in­stallation (e.g. by auto-start) follow the instructions of the installation wizard, etc.).

2 Configure Auto-Start of the ad hoc WLAN Network

● Under “Control Panel/Administrative Tools/Computer Management”, select the
“Services and Applications/Services” view. Ensure that the “Wireless Zero Configu­ration” service status is “Started” and that its "Startup Type" is “Automatic”.

Setup

1MA236_0e Rohde & Schwarz Remote Operation of Windows Based T&M Instruments with Android Tablets 9

Fig. 4: Wireless zero configuration

3 Configure the Network Settings

General Settings:

1. Select "Control Panel/Network Connections". Then right-click on the "Wireless
Network Connection" entry and select "Properties" in the context window.
The "Wireless Network Connection Properties" window is opened.

Fig. 5: Internet Protocol (TCP/IP) properties

2. Within the "General" tab select "Internet Protocol (TCP/IP)" and click on the "Prop­erties" button.
The "Internet Protocol (TCP/IP) Properties" window is displayed.

3. Define the static IP address of the T&M instrument.

4. Click "OK". The window is closed.

Setup

1MA236_0e Rohde & Schwarz Remote Operation of Windows Based T&M Instruments with Android Tablets 10

Wireless Settings:

Fig. 6: Wireless network connection properties

5. In the " Wireless Network Connection Properties" window select the "Wireless
Networks" tab.

6. Make sure the top box is checked ("Use Windows to configure my wireless network
settings").

7. Click on the "Advanced" button which opens another window.

8. Select "Computer-to-computer (ad hoc) networks only" mode and then "Close" the
window.

9. Click on the "Add…" button which opens another window.

10. Configure the "Wireless network properties" on the "Association" tab.
 Enter the desired network name (e.g. "SFC-100123").

This network name will appear in the list of Wi-Fi networks on the tablet.

 Check "Connect even this network is not broadcasting".
 Select the appropriate network authentication and encryption method for the

connection, e.g. "Open" and "WEP".

 Uncheck “The key is provided for me automatically”.
 Enter a password consisting of exactly 13 characters in the "Network key" field.

You will have to enter this password at the tablet during establishment of the
WLAN connection.

11. Click "OK" and "OK" to complete the configuration and close the configuration win­dows.

Setup

1MA236_0e Rohde & Schwarz Remote Operation of Windows Based T&M Instruments with Android Tablets 11

Fig. 7: Wireless network properties – association

The WLAN standard and the channel are automatically determined.

3.1.2.2 Installation for Windows 7 T&M Instruments

Most steps are analogous as for the Windows XP installation. For details about these
steps, see the Windows XP installation.

1 Check the Virtual Wi-Fi Bus Driver

Windows 7 uses Virtual Wi-Fi to abstract the WLAN hardware into multiple virtual
adapters. In this way the Windows 7 T&M instrument can establish a WLAN adhoc
connection while keeping the capability to setup or access other WLAN networks.
The two files "netwifibus.inf" and "vwifibus.sys" are required. Rohde & Schwarz pro­vides them together with this application note.

● Check if the files "netwifibus.inf" and "vwifibus.sys" are already available in the
"C:\Windows\" directory of the T&M instrument (see Fig. 8).

● If these files are not yet installed on the T&M instrument, take the
Rohde & Schwarz files "netwifibus.inf" and "vwifibus.sys" and copy them manually
into the "C:\Windows\inf" directory.

Setup

1MA236_0e Rohde & Schwarz Remote Operation of Windows Based T&M Instruments with Android Tablets 12

Fig. 8: Files for the Wi-Fi bus driver

2 Install the WLAN USB Adapter

Proceed in the same way as for the Windows XP installation.

3 Configure the Network Settings

Proceed in the same way as for the Windows XP installation.

4 Configure Auto-Start of the ad hoc WLAN Network

The "start wlan adhoc network.bat" configuration, provided together with this applica­tion note, is used (alternatively, you might create this file by yourself).

1. Copy the "start wlan adhoc network.bat" file into the "Start menu/All Pro­grams/Startup" directory of the T&M instrument.

2. Right-click on the file and select "Edit" from the context window.
The file is opened with Windows Notepad.

Fig. 9: Configuring the ad hoc WLAN network

3. Edit the file as follows:
 Replace "myssid" by the same network name (e.g. "SFC-100234") as set dur-

ing the configuration of the network settings in the previous section.
This network name will appear in the list of wireless networks on the tablet.

 Replace "mypassword" by the network key as set during the configuration of

the network settings in the previous section.
You will have to enter this password at the tablet during establishment of the
WLAN connection.

4. Save and close the file.

5. Restart the T&M instrument (alternatively, you can also run the .bat file).

Setup

1MA236_0e Rohde & Schwarz Remote Operation of Windows Based T&M Instruments with Android Tablets 13

3.2 Installing the RDP Client Application on the Tablet

Several RDP Apps provide the required functionality. R&S has tested and recom­mends to use the "2X Client RDP/Remote Desktop" App which is a free download.

Prerequisite:
The tablet is connected to the Internet.
You have a Google account (required for Android tablets).

Procedure:

Proceed as follows on the tablet:

1. Tap the "Play Store" icon in the list of App icons or on the Home screen.

2. Tap the Magnifier icon on the right top of the screen.

3. Enter "2x" on the empty search box via the tablet keyboard and then tap the Enter
key.

4. Select and tap the "2X Clients for RDP/Remote Desktop" App and download it.

The 2X Client App is installed. Afterwards the "2X Client" icon is shown on the Apps
screen.

Fig. 10: 2X Client RDP App

3.3 Establishing the WLAN Connection on the Tablet

Note: The tablet uses "Wi-Fi" as name for WLAN.
Prerequisites: In case of a WLAN connection via WLAN router, the WLAN router is

running; in case of a WLAN connection via WLAN USB adapter, the T&M instrument is
running (and configurations have been done according to chapter 3.1).

Proceed as follows on the tablet:

1. In the Apps area, tap the "Settings" icon.

2. If "Cellular Data" or "Mobile Network" (except for Wi-Fi) is available on your tablet,
then make sure that this option is switched off. Thereby concurrent data transmis­sion via the cellular networks (e.g. GSM, LTE) is excluded.

3. Make sure that "Bluetooth" is switched off. This avoids interference between Blue­tooth and WLAN.

Setup

1MA236_0e Rohde & Schwarz Remote Operation of Windows Based T&M Instruments with Android Tablets 14

4. If Wi-Fi is in state OFF, then turn on Wi-Fi by dragging the ON/OFF slider in the
Wi-Fi row into the ON position.
The tablet automatically detects the WLAN access point provided by the WLAN
router or the WLAN USB adapter and connects to the WLAN.

Fig. 11: Wireless and networks overview

5. Tap "Wi-Fi".
The configured WLAN networks are shown with their network names and the con­nection states are indicated. Particularly the WLAN with the network name you
have configured before at the WLAN router or at the T&M instrument with USB
adapter is shown with state "Connected" (in the figure: "cmw500-123").

Fig. 12: Wi-Fi networks

3.4 Establishing the RDP Connection

RDP operates on the WLAN connection which has been established in the previous
section.

Prerequisites:

● The T&M instrument which will be accessed remotely is already running.

● If a WLAN router is used with DHCP server enabled, the T&M instrument also has

enabled DHCP (this usually is the default setting).

● In case of DHCP enabled, the T&M instrument gets its IP address from the DHCP
server in the LAN (here the WLAN router). So look up this IP address from the
T&M instrument after having connected T&M instrument and WLAN router. At the
CMW you get the IP address from the "Setup" window under "System" > "Lan­Services".

Proceed as follows on the tablet:

1. Look for the "2X" icon in the Apps Area and tap that icon.

Setup

1MA236_0e Rohde & Schwarz Remote Operation of Windows Based T&M Instruments with Android Tablets 15

The 2X Client application is started. Then it shows the already defined connections (if
there are any), or detects that there is no connection and opens a dialog box.

Fig. 13: 2X Client – no connections

Setup a New RDP Connection:

This section is only relevant for the first setup of the RDP connection. The settings will
be remembered at later starts.

2. If the dialog box is shown (no RDP connection has been configured before), tap
"OK" in the dialog box. Else, tap "ADD" on the upper right corner.
A new screen is displayed.

3. Select "RDP Connection".
The "Connection" screen is displayed.

4. Enter the connection information according to the figure below.
 The hostname of the T&M instrument in the "Alias" row (optional);

this name provides a readable identification of the connection

 The T&M instrument's IP address in the "Server" row; see Prerequisites above

for details about the IP address.

 The port number "3389" which is the default TCP port for Windows RDP con-

nections and which the T&M instrument listens to

 The T&M instrument's user name "instrument" which is fixed (optional)
 The password for the T&M instrument (optional)

(see the user manual for the instrument)
Note: If you have entered the instrument's user name and password, these
settings will be used to skip the login window of the T&M instrument. Other­wise, the login window will be displayed when you connect to the instrument
and you have to log in manually.

Setup

1MA236_0e Rohde & Schwarz Remote Operation of Windows Based T&M Instruments with Android Tablets 16

Fig. 14: 2X Client – connection screen

5. Tap "SAVE" on the upper right corner. The new connection is shown.

Fig. 15: 2X Client – available RDP connections

Reconfigurations:

If you have saved a faulty connection configuration, then touch and hold the displayed
connection (indicated by the hostname or IP address of your T&M instrument). At the
dialog box, tap "Edit".
The "Connection" screen is opened.

Build-up of the RDP Connection:

6. Tap the desired connection (indicated by hostname or IP address).

The remote desktop connection with this instrument is built up.
 If you have configured the user name and password in the App, the login win-

dow is skipped.

 Else, the login window is displayed and a keyboard pops up (or you have to

open the keyboard via "KEYBOARD" in the upper right corner). In this case,
enter the T&M instrument 's user name ("instrument") and password (see the
user manual for your T&M instrument) to access the instrument.

Operation

1MA236_0e Rohde & Schwarz Remote Operation of Windows Based T&M Instruments with Android Tablets 17

Fig. 16: Log on to the T&M instrument

Finally, the screen of the T&M instrument is displayed on the tablet.

4 Operation

4.1 Locking the Tablet's Screen Rotation Function

Proceed as follows:

1. Hold the tablet in landscape format.

2. Swipe one finger from the top of any screen to open the notification shade.

3. Tap the "AUTO ROTATE" icon.

The icon changes to "ROTATION LOCKED".

4.2 Controlling the T&M Instrument via RDP

4.2.1 Operation via Virtual Mouse and Keyboard

Cursor

Left mouse button

Fig. 17: Accessing virtual mouse and keyboard on the tablet

Operation

1MA236_0e Rohde & Schwarz Remote Operation of Windows Based T&M Instruments with Android Tablets 18

The tablet provides a virtual mouse and a keyboard for controlling the remote desktop
screen.

● Tap "MOUSE" on the upper right to get a virtual mouse cursor and the related tap
area.

● Tap "KEYBOARD" on the upper right to get a keyboard.

The keyboard shows letters by default; you can switch to numbers and special charac­ters via the "&123" key, and back to letters via the "abcd" key.

4.2.2 Control Elements of the T&M Instrument Views

In this section, the CMW is used as example.

Tabs

Tabs are used to organize and distribute the content of a firmware application over
several views.

● Tap a tab to change to the related view.

Buttons

● Tap a button to launch its function.

Softkeys, Hotkeys and Hardkeys

The softkeys are the buttons on the right side, the hotkeys are the buttons on the bot­tom of the T&M instrument's display. The currently active softkey determines which
hotkeys are available.
Hardkeys are the buttons on a panel outside of the T&M instrument's screen.

● Tap a softkey, hotkey or hardkey to activate it.

Check Boxes, Radio Buttons, List Boxes

● Click on a checkbox or radio button with the left mouse button to switch its state.

● Click on a list box with the left mouse button to open the list.

Click on a list entry to select this entry.

Fig. 18: List box

Operation

1MA236_0e Rohde & Schwarz Remote Operation of Windows Based T&M Instruments with Android Tablets 19

Taskbar

The taskbar is a horizontal bar at the bottom of the T&M instrument's display which
allows to select the desired firmware application (e.g. "LTE Signaling").

● Tap the "TASKS" hardkey to have the taskbar displayed.
Alternatively, move the mouse cursor to the bottom edge of the CMW window to
have the taskbar displayed.

Input Boxes and Keyboard

1. Click with the left mouse button on an input box. Then tap "KEYBOARD" on the
upper right corner.

2. a) Letters: Enter a letter string as required via keyboard.

b) Numbers: Switch the keyboard display mode to numbers and enter the number.

3. Tap the "Return" key to save the entry.

Fig. 19: Input box and keyboard

Scrolling

The generator, signaling and measurement views match the T&M instrument's screen
size, so no scrolling is required and available for these views. Configuration trees to be
accessed via the "Configure…" hotkey and "Signaling Controller" / "Measurement Con­troller" views can have a larger size than the T&M instrument's screen.

● Scroll up/down in configuration trees by left-clicking on the scroll bar with the virtual
mouse.

Operation

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4.2.3 Starting a Firmware Application on a CMW

Example: Start the LTE signaling and LTE measurement application.
Main line of steps:

1. Load signaling and measurement firmware applications:
 Select the "SIGNAL GEN" hardkey. The "Signaling Controller" window is

opened.
You can expand compact tree views by tapping the "+" symbol at a tree knot.

 Check the "LTE Signaling" checkbox via virtual mouse.
 Select the "MEASURE" hardkey. The "Measurement Controller" window is

opened.

 Check the "LTE TX Measurement" checkbox via virtual mouse.

2. Click on the "TASKS" hardkey to get the taskbar.

3. Tap the "LTE Signaling" task on the taskbar.

4. Configure the signaling application by tapping softkeys and hotkeys, by clicking on
check boxes and list boxes. Activate the keyboard for entering values in input box­es.

5. Start signaling: Tap the "LTE Signaling" softkey, then click on the "ON OFF" hard­key.
After successful start the softkey label shows "ON".

6. Switch to LTE measurement by selecting the "LTE TX Meas." softkey near the top
of the softkey bar.

7. Configure the measurement application via softkeys, hotkeys, etc.

8. Start the measurement: Tap the "LTE TX Meas." softkey, then click on the "ON
OFF" hardkey.

9. Check/edit the main signaling settings by tapping the "LTE Signaling" softkey while
the LTE measurement view is still displayed. LTE signaling hotkeys are shown in
the hotkey bar at the bottom of the screen.

Note: It is not possible to start a firmware application via keyboard.

4.3 Disconnecting from the T&M Instrument

1. Tap "MORE" on the upper right corner of the screen.

2. Tap "Disconnect".

Fig. 20: Disconnect via 2X Client

Operation

1MA236_0e Rohde & Schwarz Remote Operation of Windows Based T&M Instruments with Android Tablets 21

After disconnecting the 2X Client screen shows the available connections.

Alternative:

1. Move the cursor of the virtual mouse to the bottom edge of the screen.
The Windows taskbar is shown.

2. Click on "Start".

3. Click on "Disconnect".

Fig. 21: Disconnect via Windows taskbar

If you re-connect to the T&M instrument after having disconnected before, 2X Client
automatically logs in if you have entered user name and password during configuration
of your RDP connection.

Note:

A remote log off from the T&M instrument or shutdown via the 2X Client App or the
Windows taskbar is not supported.

Related Documents

1MA236_0e Rohde & Schwarz Remote Operation of Windows Based T&M Instruments with Android Tablets 22

5 Related Documents

● 1MA216: Remote Operation of Windows-Based T&M Instruments with Apple iPad
This document describes how a Windows-based R&S T&M instrument is remotely
operated by an Apple iPad as if working on it locally. On the iPad, a special App
implements the Windows Remote Desktop functionality. T&M instrument and iPad
are connected via WLAN.

● 7BM82: Apple iPad Remote Control for Broadcasting T&M Instruments
This application note explains the setup and operation of R&S T&M instruments via
iPad with the example of the Remote Desktop – RDP App from MochaSoft and the
WL0049A USB WLAN adapter from LogiLink.

● RAC-0703-0029: Remote Operation of R&S Instruments Using Remote Desktop

Connection via LAN

This application note describes how to use the “Remote Desktop Connection” pro­gram to operate R&S T&M instruments connected in a LAN from a remote com­puter and how to connect and configure various kinds of networks (DHCP, Fixed IP
address, Direct).

● 1ER01: Remote Monitoring and Control of the R&S® RTO with a Web Browser
This application note describes remote operation or monitoring of the R&S RTO
digital oscilloscope through a standard web browser. The common cross-platform
technology Virtual Network Computing (VNC) is used as a server on the instru­ment.

6 References

[1] DIR 635 WLAN router from D-Link, documentation

http://www.dlink.com/uk/en/home-solutions/support/product/­/media/Consumer_Products/DIR/DIR%20635/Manual/DIR_635_Manual_EN_U
K.pdf

[2] 2X RDP client software

http://www.2x.com

[3] 2X Client manual for Android

http://www.2x.com/docs/en/manuals/html/client­android/2XClientForAndroid.html

About Rohde & Schwarz

Rohde & Schwarz is an independent group
of companies specializing in electronics. It is
a leading supplier of solutions in the fields of
test and measurement, broadcasting, radio­monitoring and radiolocation, as well as
secure communications. Established more
than 75 years ago, Rohde & Schwarz has a
global presence and a dedicated service
network in over 70 countries. Company
headquarters are in Munich, Germany.

Environmental commitment

● Energy-efficient products

● Continuous improvement in environ-

mental sustainability

● ISO 14001-certified environmental
management system

Regional contact

Europe, Africa, Middle East
[phone]

[e-mail]

North America
1-888-TEST-RSA (1-888-837-8772)

[e-mail]

Latin America
[phone]

[e-mail]

Asia/Pacific
[phone]

[e-mail]

This application note and the supplied
programs may only be used subject to the
conditions of use set forth in the download
area of the Rohde & Schwarz website.

R&S® is a registered trademark of Rohde & Schwarz
GmbH & Co. KG; Trade names are trademarks of the
owners.

Rohde & Schwarz GmbH & Co. KG

Mühldorfstraße 15 | D - 81671 München
Phone + 49 89 4129 - 0 | Fax + 49 89 4129 – 13777

www.rohde-schwarz.com