Rohde&Schwarz NRP-Z81, NRP-Z85, NRP-Z86 Operating Manual

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Operating Manual

Wideband Power Sensor

R&S



NRP-Z81

1137.9009.02

R&S



NRP-Z85

1411.7501.02

R&S



NRP-Z86

1417.0109.40/.44

Test and Measurement

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Dear Customer,

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

1172.9530.12-08 2

R&S NRP-Z81/Z85/Z86 Safety Information

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Safety Information

Safety information is part of the product documentation. It warns you of potential dangers and gives instructions on how to prevent personal injury or damage caused by dangerous situations. Safety information is provided as follows:

• In the Getting Started manual, Chapter 1.1 “Safety instructions”. The same information is provided in many languages as printed "Safety Instructions". Both documents are delivered with the power sensor.

• Throughout the documentation, safety instructions are provided when you need to take care during setup or operation.

R&S NRP-Z81/-Z85/-Z86 Supplement

Operation of the

R&S NRP-Z81/-Z85/-Z86 wideband power sensors

on R&S NRP base unit

Dear Customer,

for proper operation of the R&S NRP-Z81/-Z85/-Z86 wideband power sensors on a R&S NRP, the right software is required for the base unit:

Main Program (Application)  5.01 Bootloader  5.01 Keyboard Controller  3.22

The revision numbers for the software components installed in the base unit can be displayed under menu item 'System Info', lines 'Main Program', 'Bootloader' and 'Keybd. Ctrl.'. The 'System Info' can be found in the 'System' menu.

Please note, that the statistics capabilities of the sensors are not yet supported by these revisions.

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R&S NRP-Z81/-Z85/-Z86 Table of Contents Chapter 1

Table of Contents

1 Putting into Operation ......................................................................................................1.1

Unpacking the sensor ......................................................................................................................1.1

Connecting the sensor ....................................................................................................................1.1

Operation with the R&S NRP/NRP2 power meter .........................................................................1.2

Connecting the power sensor .....................................................................................................1.2

PC control .........................................................................................................................................1.2

Hardware and software requirements ........................................................................................1.2

Operation via the R&S NRP-Z4 passive USB adapter ...............................................................1.3

Connecting the sensor to the DUT .............................................................................................1.4

Operation via the Active USB Adapter R&S NRP-Z3 .................................................................1.4

Operation via the R&S NRP-Z5 Sensor Hub ..............................................................................1.5

Equipment Supplied and Alternative Accessories ..........................................................1.5

Ports and LEDs ...............................................................................................................1.6

Test Setup .......................................................................................................................1.7

Troubleshooting ..............................................................................................................1.9

Operation with other Rohde & Schwarz test instruments..........................................................1.10

Hardware and software requirements ......................................................................................1.10

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List of Figs. and Tables Chapter 1 R&S NRP-Z81/-Z85/-Z86

Figs.

Fig. 1-1 Displaying the total available power of a USB port ...........................................................1.3

Fig. 1-2 Configuration with Passive USB Adapter R&S NRP-Z4 ...................................................1.3

Fig. 1-3 Configuration with Active USB Adapter R&S NRP-Z3 ......................................................1.4

Fig. 1-4 Changing the primary adapter ..........................................................................................1.5

Fig. 1-5 Ports and LEDs on front panel ..........................................................................................1.6

Fig. 1-6 Ports on rear panel ...........................................................................................................1.6

Fig. 1-7 Unlatching the R&S Instrument connector ........................................................................1.7

Fig. 1-8 Typical test setup with R&S NRP-Z5 and PC ...................................................................1.8

Fig. 1-9 Changing the view in Device Manager .............................................................................1.9

Fig. 1-10 Identification of USB root hub on which R&S NRP-Z5 is operated ..................................1.9

Fig. 1-11 Deactivation of Selective Suspend for a USB root hub ..................................................1.10

Tables

Table 1-1 RF connectors of R&S NRP-Z81/85/86 power sensors ...................................................1.1

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R&S NRP-Z81/-Z85/-Z86 Unpacking the sensor

NOTICE

Follow the instructions below precisely to prevent damage to the power sensor – particularly when you are putting it into operation for the first time.

The power sensor contains components which can be destroyed by electrostatic discharges. To prevent this happening, never touch the inner conductor of the RF connector and never open the power sensor.

NOTICE

To prevent EMI, the power sensor must never be operated with its enclosure wholly or partially removed. Only use shielded cables that meet the relevant EMC standards.

Never exceed the maximum RF power limit. Even brief overloads can destroy the power sensor.

Power sensor

Male connector

Matching female connector

Tightening torque

R&S NRP-Z81

N N 1.36 Nm (12" lbs)

R&S NRP-Z85

2.92 mm

3.5 mm/2.92 mm/SMA

0.9 Nm (8" lbs) R&S NRP-Z86

2.4 mm

2.4 mm/1.85 mm

1 Putting into Operation

Unpacking the sensor

Remove the sensor from its packing and check that nothing is missing. Inspect all items for damage. If you discover any damage, inform the carrier responsible immediately and keep the packing to support any claims for compensation.

It is also best to use the original packing if the sensor is to be shipped or transported at a later date.

Connecting the sensor

Caused by their different frequency ranges, the R&S NRP-Z81/85/86 power sensors have different RF connectors. In this context, the following sections will refer to Table 1-1:

Table 1-1 RF connectors of R&S NRP-Z81/85/86 power sensors

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Operation with the R&S NRP/NRP2 power meter R&S NRP-Z81/-Z85/-Z86

Operation with the R&S NRP/NRP2 power meter

Connecting the power sensor

The power sensor can be connected to the R&S NRP/NRP2 base unit when it is in operation. The multiple circular plug-in connector must be inserted, red marking upwards, into one of the R&S NRP/NRP2 base unit’s sensor connectors. When the power sensor is connected, it is detected by the R&S NRP/NRP2 base unit and initialized.

See Table 1-1 for the type of male RF connector a certain power sensor has and which female connectors it mates with. Using light pressure, and keeping the male connector perpendicular, insert it into the female connector and tighten the locking nut (right-hand thread). In many cases, the RF connector only requires manual tightening. However, for maximal measurement accuracy, the RF connector must be tightened using a torque wrench with a nominal torque that corresponds with the tightening torque shown in Table 1-1.

PC control

Hardware and software requirements

The following requirements must be met if the power sensor is to be controlled by a PC via an interface adapter:

 The PC must have a USB port.  Either Microsoft Windows XP (32 Bit), Microsoft Windows Vista (32 or 64 Bit), Microsoft Windows 7

(32 or 64 Bit), or x86 Linux (with kernel 2.6.8 oder more recent) must be installed as the operating system of the PC. 64-bit versions of Microsoft Windows XP are not supported. Operation with older versions of Microsoft Windows with USB support (especially Microsoft Windows 2000) is normally possible but cannot be guaranteed.

 The USB device drivers in the supplied NRP Toolkit software package must be installed. If these requirements are met, the power sensor can be controlled using a suitable application program

such as the NrpFlashup program contained in the Microsoft Windows version of the NRP Toolkit (includes the modules Power Viewer, USB Terminal, Firmware Update and Update S-Parameters).

When you insert the CD-ROM supplied with the R&S NRP power sensor, the NRP Toolkit is automatically installed on your PC. The rest of the procedure is self-explanatory.

The power sensor can be powered in two ways:  Self-powered from a separate power supply via the Active USB Adapter R&S NRP-Z3 or the

Sensor Hub R&S NRP-Z5.

 Bus-powered from the PC or a USB hub with its own power supply (self-powered hub) via the

Active USB Adapter R&S NRP-Z3 or via the Passive USB Adapter R&S NRP-Z4.

As the power sensor is a high-power device, there is no guarantee that it can be powered from all types of laptop or notebook in the bus-powered mode. To be sure, you should determine the current at the USB connectors beforehand:

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R&S NRP-Z81/-Z85/-Z86 PC control

 In the Windows™ start menu, select Settings – Control Panel  Select the System icon  Select the Hardware tab  By clicking on the button with that name, start the Device Manager  Open USB Controller (all USB controllers, hubs and USB devices are listed here)  Double-click on USB Root Hub or select Properties in the context menu (use the

right-hand mouse button)

 Select the Power tab (Fig. 1-1). If the hub is self-powered and the total power

available is, as indicated by Hub Information, 500 mA per port, high-power devices can be connected.

Fig. 1-1 Displaying the total available power of a USB port

If you have any doubts, ask the manufacturer if the USB port on your laptop or notebook can handle high-power devices.

Operation via the R&S NRP-Z4 passive USB adapter

Fig. 1-2 is a schematic of the measurement setup. The order in which the cables are connected is not critical.

Fig. 1-2 Configuration with Passive USB Adapter R&S NRP-Z4

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PC control R&S NRP-Z81/-Z85/-Z86

Connecting the sensor to the DUT

Operation via the Active USB Adapter R&S NRP-Z3

Fig. 1-3 shows the configuration with the Active USB Adapter R&S NRP-Z3, which also makes it possible to feed in a trigger signal for the Timeslot and Trace modes. The order in which the cables are connected is not critical.

Fig. 1-3 Configuration with Active USB Adapter R&S NRP-Z3 The plug-in power supply for the R&S NRP-Z3 can be powered from a single-phase AC source with a

nominal voltage range of 100 V to 240 V and a nominal frequency between 50 Hz and 60 Hz. The plugin power supply autosets to the applied AC voltage. No manual voltage selection is required.

The plug-in power supply comes with four primary adapters for Europe, the UK, the USA and Australia. No tools of any kind are required to change the primary adapter. The adapter is pulled out manually and another adapter inserted until it locks (Fig. 1-4).

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R&S NRP-Z81/-Z85/-Z86 PC control

NOTICE

The plug-in power supply is not intended for outdoor use. Keep within the temperature range of 0°C to 50°C. If there is any condensation on the plug-in power supply, dry it off before connecting it to

the AC supply.

Fig. 1-4 Changing the primary adapter The plug-in power supply is short-circuit-proof and has an internal fuse. It is not possible to replace this

fuse or open the plug-in power supply.

Operation via the R&S NRP-Z5 Sensor Hub

The R&S NRP-Z5 sensor hub allows up to four power sensors to be operated on one PC. It combines the following functions:

 4-port USB 2.0 hub  Power supply  Through-wired trigger bus  Trigger input and trigger output via BNC sockets

Equipment Supplied and Alternative Accessories

The following equipment is supplied:

 Sensor hub  External power supply  Power cable  USB cable

Instead of the supplied, 2 m long USB cable, it is possible to use any other USB-2.0-certified cable (USB connector type A to USB connector type B) with a maximum length of 5 m. If a locking connection is required at the instrument end, it is also possible to use the passive R&S NRP-Z4 interface adapter instead of a standard USB cable.

As an alternative to the supplied external power supply, power can also be supplied using a DC voltage source with an output voltage of 12 V to 24 V and a power output of at least 24 W. Make sure that the polarity is correct (positive pole inside, negative pole outside). The alternative DC voltage source must be in the same building as the R&S NRP-Z5 and must be connected to the latter via a cable with a maximum length of 30 m. Power must not be supplied from a low-voltage supply system.

The supplied external power supply is short-circuit-proof and is also protected by an internal fuse. It is not possible to change the fuse or open the unit.

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PC control R&S NRP-Z81/-Z85/-Z86

NOTICE

The external power supply is not intended for outdoor use. Keep within the temperature range of 0°C to 50°C. If there is any condensation on the external power supply, dry it off before connecting it

to the AC supply.

1–4

Sockets for connecting the power sensors

5–8

Green LEDs for indicating normal operation

9–12

Yellow LEDs for indicating faults

Trigger output (BNC socket)

Trigger input (BNC socket)

Plug allowing connection to Rohde & Schwarz measuring instruments (via R&S NRP-Z2) or to a PC (via R&S NRP-Z4)

USB socket (type B) for connection to the USB host (PC or Rohde & Schwarz measuring instrument without sensor socket)

Power supply socket (supplied external power supply unit or alternative power supply (12 V to 24 V/24 W))

Ports and LEDs

The power sensors are connected to the front panel of the R&S NRP-Z5. The ports and LEDs on the front panel of the R&S NRP-Z5 are shown in Fig. 1-5.

Fig. 1-5 Ports and LEDs on front panel

On the rear panel are the ports for power supply, USB host, trigger input and trigger output. The ports on the rear panel are shown in Fig. 1-6.

Fig. 1-6 Ports on rear panel

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R&S NRP-Z81/-Z85/-Z86 PC control

Unlatch the R&S Instrument connector on the rear panel by pressing down the unlatching ring of the built-in plug and pulling off the cable jack at the same time (Fig. 1-7).

Fig. 1-7 Unlatching the R&S Instrument connector

R&S NRP-Z5 sensor hub

External power supply unit (supplied)

Power cable (supplied)

AC power supply

USB cable (supplied)

PC with USB host port

7, 8

BNC cable (optional, not supplied)

Trigger source (optional)

Triggered device (optional)

11-14

R&S NRP-Zxx power sensors (one to four sensors)

Signal source

Test Setup

Fig. 1-8 shows a typical test setup:

The sequence in which the cables are connected is not important. As already mentioned in section Ports and LEDs, the R&S NRP-Z4 passive interface adapter can also

be used as an alternative to a standard USB cable for connecting to the PC. This adapter is connected to the R&S Instrument port. Simultaneous operation at two USB hosts is not possible as the USB host connected to the R&S Instrument port always has priority.

It is possible to cascade several R&S NRP-Z5 sensor hubs by connecting the R&S Instrument port of an R&S NRP-Z5 to one of the sensor ports of another R&S NRP-Z5. However, external triggering and the use of the Trigger Master function are then not possible. Instead, it is recommended to connect all R&S NRP-Z5 hubs individually to the USB host or to an interposed USB hub, and to feed the external trigger signal to all R&S NRP-Z5 hubs via their trigger inputs; or to forward the external trigger signal from the trigger output of the R&S NRP-Z5 to which the Trigger Master is connected to the trigger inputs of the other R&S NRP-Z5 hubs.

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PC control R&S NRP-Z81/-Z85/-Z86

Fig. 1-8 Typical test setup with R&S NRP-Z5 and PC

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R&S NRP-Z81/-Z85/-Z86 PC control

Troubleshooting

A frequent problem, especially in the case of operation under Microsoft Windows XP, is that the R&S NRP-Z5 fails to respond after a power sensor connected to the R&S NRP-Z5 is disconnected and reconnected. It is then necessary to restart the PC.

This problem is not specific to the R&S NRP-Z5, but occurs with all USB hubs. You can try to eliminate the problem by switching off the Selective Suspend for the USB port of the PC on which the R&S NRPZ5 is operated. The following step-by-step description is based on an English version of Windows XP:

1. Connect the R&S NRP-Z5 and put it into operation. Connect at least one power sensor.

2. Start the Device Manager and change the view by selecting View - Devices by connection (Fig. 1-9).

Fig. 1-9 Changing the view in Device Manager

3. Now identify the USB root hub on which the R&S NRP-Z5 is operated. To do so, expand the hierarchical display of the PC components, as shown in Fig. 1-10. Under PCI bus, find the USB host controller to whose root hub the R&S NRP-Z5 is connected. The R&S NRP-Z5 is shown as the Generic USB Hub. It can be distinguished from other USB hubs by the power sensor connected to it.

Fig. 1-10 Identification of USB root hub on which R&S NRP-Z5 is operated

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Operation with other R&S test instruments R&S NRP-Z81/-Z85/-Z86

4. Double-clicking USB Root Hub opens the USB Root Hub Properties dialog box. Select the Power Management tab. Remove the check mark next to Allow the computer to turn off this device to save power and confirm this with OK.

Fig. 1-11 Deactivation of Selective Suspend for a USB root hub

Operation with other R&S test instruments

Hardware and software requirements

Many Rohde & Schwarz test instruments allow power measurements using power sensors of the R&S NRP-Zxx series. The power sensors are generally connected to the USB ports of the test instrument via one of the two interface adapters, R&S NRP-Z3 or R&S NRP-Z4, or the Sensor Hub R&S NRP-Z5. On some instruments, such as the R&S SMU signal generator, there is also an R&S NRP sensor connector available for a direct connection. The R&S NRP-Z5 can be hooked up to this connector via an extension cable R&S NRP-Z2 (Model .03, .05, or .15). For that purpose, the R&S Instrument connector of the R&S NRP-Z5 is used.

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R&S NRP-Z81/-Z85/-Z86 Table of Contents Chapter 2

Table of Contents

2 Virtual Power Meter ...........................................................................................................2.1

Overview............................................................................................................................................2.1

Menus .........................................................................................................................................2.3

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List of Figs. and Tables Chapter 2 R&S NRP-Z81/-Z85/-Z86

Figs.

Fig. 2-1 Power Viewer virtual power meter ...................................................................................2.1

Tables

Table 2-1 Virtual power meter keys ..................................................................................................2.2

Table 2-2 Virtual power meter entry fields ........................................................................................2.2

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R&S NRP-Z81/-Z85/-Z86 Overview

2 Virtual Power Meter

You will find the NrpFlashup program for controlling sensors with a PC under Windows™ on the CD-ROM that accompanies the sensor. The program comprises several modules which can be started centrally via the Windows™ start-menu entry NRP Toolkit.

This section describes the Power Viewer program module. This is a virtual power meter which only uses a cut-down set of the sensor’s functions. This means that after an extremely brief familiarization period, the user can measure the average power of modulated signals.

The other modules in NrpFlashup are described in Chapter 3 of the operating manual (Terminal and

Update S-Parameters modules) or in the service manual (Firmware Update module).

Overview

Start the virtual power meter using the NRP Toolkit – Power Viewer start-menu entry. The Power Viewer program window is displayed (Fig. 2-1).

Fig. 2-1 Power Viewer – virtual power meter

The result display occupies most of the program window. The result, unit and additional sensor status information are displayed. The serial number of the sensor is displayed in the bottom right. The program window also contains animated buttons and entry fields (see Table 2-1 and Table 2-2).

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Overview R&S NRP-Z81/-Z85/-Z86

Table 2-1 Virtual power meter keys

Button Function Key combination

Exit Terminates the program. The current settings are saved and recalled the

W Selects Watt as the display unit. Alt + W

dBm Selects dBm as the display unit. Alt + M

Zero Zeroes the sensor. Alt + Z

dB Selects dB as the display unit. This is the log of the ratio of the measured

;% Selects % as the display unit. The difference between the measured value

M2Ref Makes the current measured value the reference value for the relative

Offset On/Off

Averaging Man/Auto

Apply

next time the program is started.

value to the reference value.

and the reference value is expressed as a percentage.

display units dB and %.

Turns the offset correction for the sensor on or off. If the offset correction is Off, the Offset/dB entry field has a grey background.

Turns auto-averaging on or off. When auto-averaging is on, the Length entry field has a grey background; the current averaging factor is displayed.

Accepts edited numerical values in the Frequency/Hz, Value/dB and Length entry fields and transfers them to the sensor.

Alt + E

Alt + B

Alt + %

Alt + R

Alt + N

Alt + T

Alt + A or Enter key

Table 2-2 Virtual power meter entry fields

Entry field Function

Frequency/Hz Frequency of the RF carrier in Hertz.

Value/dB Attenuation in dB of the twoport connected to the sensor. The valid range is –100 to 100. The offset

Length Length of the averaging filter (= averaging factor). The valid range is 1 to 65536. Averaging must be set

correction must be activated beforehand with the Offset On/Off button if this entry field is to be edited.

to manual with the Averaging Man/Auto button if this entry field is to be edited.

Scientific notation can also be used for the entry fields. If an invalid entry is made, an error message is output. An edited numerical value will not be transferred to the sensor unless you use the Apply button or the Enter key to terminate the entry.

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R&S NRP-Z81/-Z85/-Z86 Overview

Menus

he menu bar can be used to call less frequently used functions.

File Start Log ...

Stop Log

View Display Refresh Rate

Colours Result

Unit Edit Button

Resolution

Options Read Sensor Status …

Opens a file-selection dialog to specify the path and name of the log file. Clicking the Save button starts the recording. All displayed values are written line-by-line to the log file with the date (format: YY/MM/DD) and time (format: hh:mm:ss.ms). Example:

-22.51 dBm (03/02/25 15:37:25.310)

Ends the log-file recording.

Opens a dialog box to adjust the display refresh rate. The time in milliseconds between two refresh operations is entered. The default setting is 200 ms.

Opens a dialog box to select the background colour for

• the result,

• the unit,

• the text in the number fields or

• the key labelling.

For setting the result resolution. If autoaveraging has been selected, a higher resolution leads to a greater averaging factor, which means a longer result settling time.

Reads the current sensor status. A parameter list is output.

Read Error Queue …

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Reads the error queue. All the error messages that have been issued since the last call are read lineby-line. A tick before this menu entry indicates that an error has occurred.

Overview R&S NRP-Z81/-Z85/-Z86

Simulation …

Reset Sensor

Help Contents

About

For trying out the functions of the virtual power meter without actually connecting a sensor. The display alternates between

Measurement Value 1 & Measurement Value 2

with a period given by Interval. Simulation can be activated immediately with the Activate check box.

Initializes the sensor. Any previous zeroing remains valid.

Opens the table of contents for the online-help facility.

Displays information about the program version used, etc.

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R&S NRP-Z81/-Z85/-Z86 Table of Contents Chapter 3

Table of Contents

3 Manual Operation ...............................................................................................................3.1

Program module “Terminal” ...........................................................................................................3.1

Main control elements.................................................................................................................3.1

Menus .........................................................................................................................................3.3

Program module “Firmware Update”.............................................................................................3.6

Program module “Update S-Parameters” ......................................................................................3.6

Fundamentals .............................................................................................................................3.6

Procedure ...................................................................................................................................3.9

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List of Figs. and Tables Chapter 3 R&S NRP-Z81/-Z85/-Z86

Figs.

Fig. 3-1

Fig. 3-2 Sending commands using command files ........................................................................3.2

Fig. 3-3 Dialog window for loading an s-parameter table...............................................................3.9

Fig. 3-4 Dialog window for loading the backup file of a calibration data set ................................3.10

Fig. 3-5 Subsequently changing the default behaviour of the s-parameter correction ................3.11

Sending commands using the Input field .........................................................................3.1

Tables

Table 3-1

Table 3-2 Buttons assigned to the Command File field ...................................................................3.2

Table 3-3 Buttons assigned to the Output field ................................................................................3.3

Table 3-4 Uncertainties of the s-parameter test system (example) ..................................................3.7

Table 3-5 Interpolated uncertainties of measurement frequencies for s-parameters (example) ......3.7

Buttons assigned to the Input field...................................................................................3.2

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R&S NRP-Z81/-Z85/-Z86 Program module “Terminal”

3 Manual Operation

The previous section describes the Power Viewer program module supplied with the instrument. This module simplifies the most frequently used function of a power meter – measuring the average power of an RF signal of almost any modulation. Other program modules are also part of the supplied equipment and can be selected in the Start menu:

• Power Viewer: A detailed description of this virtual power meter module is provided in section 2.

• Terminal: Program module for sending commands and command sequences to the sensor and for displaying measurement results, status information and other data from the sensor

• Firmware Update: Program module for updating the sensor firmware

• Update S-Parameters: Program module for loading an s-parameter table into the sensor

Program module “Terminal”

Main control elements

With the USB terminal, commands and command sequences can be sent to the sensor in two different ways:

• Commands are entered in the Input field (Fig. 3-1). Consecutive commands can be entered as separate lines, one below the other. The buttons associated with the Input field are described in Table 3-1.

• Commands or command sequences are stored in command files. Command files are created with a text editor, for instance, and then stored. They can be called as often as required (Fig. 3-2). The buttons of the Command File field are described in Table 3-2.

Fig. 3-1 Sending commands using the Input field

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Program module “Terminal” R&S NRP-Z81/-Z85/-Z86

Fig. 3-2 Sending commands using command files

Table 3-1 Buttons assigned to the Input field

Button Function Key combination

Send

Loop

Clear

Font key

Colour key

Sends the content of the Input entry field to the sensor.

With Loop the command or command sequence is cyclically sent. Pressing the button again terminates the cyclic transmission. The repetition rate is set in a dialog window that can be opened with View - Loop...

Clears the content of the Input field.

Opens a dialog window where the font for the Input field can be selected.

Opens a dialog window where the background colour of the Input field can be selected.

Alt + S

Alt + L

Alt + R

Table 3-2 Buttons assigned to the Command File field

Button Function Key combination

Send Sends the content of the command file to the sensor. Alt + E

Loop

Alt + O

History

Edit Opens the selected command file in the Windows™ text editor. Alt + D

… Opens a file opening dialog for selecting the command file.

Opens a window for editing the command file name in the Command File field.

Alt + H

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R&S NRP-Z81/-Z85/-Z86 Program module “Terminal”

where the lines stored in

Only lines starting with the entered character

Only lines not starting with the entered character

Only lines containing the entered character string

Only lines not containing the entered character

Lines not matching the specific filter criterion are blanked but not

A command line starting with a tab, a blank or a special character is considered a comment and not

orwarded to the sensor.

Measurement results, parameters and status information returned by the sensor are displayed in the Output field.

Table 3-3 Buttons assigned to the Output field

Button Function Key combination

Clear

Copy

Font button

Colour button

Clears the content of the Output field

Copies the content of the Output field to the clipboard. (Another possiblity: mark the desired information in the output window with the mouse cursor, press the right mouse key or Ctrl+C and then copy the selected text to the clipboard using the menu item Copy in the opened context menu.)

Opens a dialog window where the font for the Output field can be selected.

Opens a dialog window where the background colour of the Output field can be selected.

Close the USB terminal with OK.

Menus

View Post Filter … Opens the Output Postfilter dialog window

the input buffer can be filtered according to different criteria.

Alt + A

Alt + Y

Filter criteria:

Only + Starting with: string are displayed.

Not + Starting with: string are displayed.

Only + Containing: are displayed.

Not + Containing: string are displayed.

cleared.

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Program module “Terminal” R&S NRP-Z81/-Z85/-Z86

The number of lines matching the filter

dialog is automatically opened when the

dialog window where the response time of

indicates the time elapsed between dispatch of the last

button is clicked, the response times exceeding the

button is

field are

is active, the time

measurement is terminated as soon as the first response arrives after a

active, the time measurement is terminated as soon as the first

dialog

og is

The

is active, the

The dialog

Filtering is started with Apply. criterion is displayed in the Linecounter field. If Open on startup active, the Output Postfilter terminal is started. The dialog window is closed with OK.

Response Time …

Opens the Response time the sensor can be set.

Current

command and receipt of an acknowledgement from the sensor. When the Max value in the limit / ms field are recorded. When the Min clicked, the response times within the value in the limit / ms recorded.

If Trigger on first incoming response

command is sent. If Trigger on response matching filter settings

response matching the filter criterion in the Output Postfilter window is received.

If Open on startup is active, the Response Time dial automatically displayed when the Terminal module is started. dialog window is closed with OK.

Loop … Opens the Loop controls dialog

window where the cyclic transfer of commands and command sequences can be controlled.

In the Delay / ms field, the time interval for the cyclic transfer is specified in milliseconds.

The number of completed transfer cycles is displayed in the Counter field. If Open on startup Response time dialog is automatically opened when the Terminal module is started. window is closed with OK.

1172.9530.12 3.4 E-3

R&S NRP-Z81/-Z85/-Z86 Program module “Terminal”

In this mode, a time stamp is added to

In this mode, the response blocks

from the sensor are displayed in

field is automatically cleared when the

With this option active, older items in

field are automatically

shifted upward and off the display if

With this option active, a line feed is

appended to each response block

field is automatically cleared when the

With this option active, the text in the

field is interpreted as a

field can

Options Protocol Mode

each response block.

ex Mode

hexadecimal format.

Auto Delete With this option active, the Output

Send button is pressed.

Auto Scroll

the Output

space is required for new values.

LF at EOT

from the sensor.

Delete on Start With this option active, the Output

Terminal module is started.

Send as Hex

Input

hexadecimal character sequence.

Advanced … Opens a dialog window where the buffer size for the Output

be set.

Help Contents

About

1172.9530.12 3.5 E-3

Opens the table of contents for the online help.

Displays information about the program version, etc.

Program module “Firmware Update” R&S NRP-Z81/-Z85/-Z86

Program module “Firmware Update”

A detailed description of the program module for firmware updates is provided in the Service Manual.

Program module “Update S-Parameters”

Fundamentals

With the power sensor R&S NRP-Z81/85/86, the influence of any twoport – e. g. an adapter – between the signal source and the sensor input can be considered, allowing the power P actually delivered by the signal source to be calculated.

Fig. 3-1 Operation with twoport between signal source and sensor input

A precondition is that a complete set of s-parameter data of the twoport is available in the frequency range in question. The set of calibration data of the sensor therefore includes a table with up to 1000 measurement frequencies. The real and the imaginary part as well as the uncertainty of the

and

s-parameters

The measurement frequencies in the s-parameter table can be selected independent of the calibration frequencies of the sensor, allowing the twoport frequency range of interest to be optimally covered. The real and the imaginary parts between these measurement frequencies are linearly interpolated. Below the first and above the last measurement frequency, the values of the first and the last measurement frequency are used, respectively.

The NrpFlashup program (menu item Update S-Parameters) is used for loading an s-parameter table. To ensure compatibility with a great number of network analyzers, NrpFlashup can process measurement data files in S2P format. All standard frequency units (Hz, kHz, MHz, GHz) and display formats (real and imaginary part, linear magnitude and phase, magnitude in dB and phase) are supported. The only restriction is that a reference impedance of 50  must be used for the s-parameters. Additional noise parameters in the measurement data file are ignored.

Structure of the S2P measurement data file:

1. The option line has the following format (square brackets indicate that the enclosed content is

optional):

# [<frequency unit>] [<parameter>] [<format>] [<R n>] # identifies the option line. The <frequency unit> may be Hz, kHz, MHz or GHz. If a frequency unit is not specified, GHz is implicitly assumed. If a parameter is specified, S must be used in <parameter> for s-parameter files. If a parameter is not specified, S is implicitly assumed. The <format> may be MA (linear magnitude and phase in degree), DB (magnitude in dB, phase in degree) or RI (real and imaginary part). If a format is not specified, MA is implicitly assumed. R is optional and followed by the reference impedance in . If an entry is made for R, R50 must be specified. If no entry is made, R50 is implicitly assumed.

are stored for each frequency.

1172.9530.12 3.6 E-3

R&S NRP-Z81/-Z85/-Z86 Program module “Update S-Parameters”

()()()(

)

(

)

()(

)

()(

)

(

)

[

]

(

)

[

]

The option line should therefore read:

[HZ | KHZ | MHZ | GHZ] [S] [MA | DB | RI] [R 50]

2. The measurement frequencies in ascending order are specified as follows:

3. Comments: Any line starting with an exclamation mark (!) is interpreted as a comment line.

To characterize the measurement uncertainty of the s-parameter test system, another data file can optionally be created. Without this file, the measurement uncertainty cannot be correctly calculated in the sensor. The syntax of the uncertainty data file is similar to that of the S2P data file but U is specified as <Parameter> in the option line so that the option line reads # Hz U for frequencies in Hz. The measurement frequencies must not be identical to those of the S2P measurement data files. In most cases a few entries will be sufficient to characterize the measurement uncertainty of the sparameter test system. An s-parameter uncertainty as high as that of the neighbouring measurement frequencies of the uncertainty data file is then selected. If different values are available, the higher one is chosen. This is illustrated in the example below:

Table 3-4 Uncertainties of the s-parameter test system (example)

f in GHz unc [sik(f)]

where

0.1 0.01

1.0 0.01

1.1 0.005

10.0 0.005

10.1 0.01

40.0 0.01

fs is the display format as specified in the option line:

fsfs arg (display format for linear magnitude and phase in degree) or

ijkijk

fsfsfsfsf

iiiii

22122111

fsfs arg lg20  (display format for magnitude in dB and phase in degree)

ijkijk

fsfs Im Re (display format for real and imaginary part)

ijkijk

Table 3-5 Interpolated uncertainties of measurement frequencies for s-parameters (example)

f in GHz unc [sik(f)]

0.9 0.01

0.95 0.01

1.0 0.01

1.05 0.01

1.1 0.005

1.15 0.005

1.2 0.005

At 1.05 GHz, the higher uncertainty of the two adjacent 1.0 GHz and 1.1 GHz measurement frequencies is entered in the s-parameter table. If an uncertainty of 0.005 is desired for all frequencies above 1.0 GHz, the first measurement frequency in the uncertainty data file must above 1.0 GHz, e.g.

1.000001 GHz.

1172.9530.12 3.7 E-3

Program module “Update S-Parameters” R&S NRP-Z81/-Z85/-Z86

(

)

[

]

(

)

[

]

(

)

[

]

(

)

[

]

Structure of the uncertainty data file (square brackets indicate that the enclosed content is optional):

1. The option line has the following format:

# [<frequency unit>] <parameter> [<format>] [<R n>] # identifies the option line.

he <frequency unit> may be Hz, kHz, MHz or GHz. If a frequency unit is not specified, GHz is

T implicitly assumed. U must be specified for <parameter> in uncertainty data files. If a parameter is not specified, S is implicitly assumed and as a result an error message is triggered. <format> is ignored in uncertainty measurement files; the entry is therefore irrelevant. R is optional and followed by the reference impedance in . If an entry is made for R, R50 must be specified. If no entry is made, R50 is implicitly assumed. The option line should therefore read: # [HZ | KHZ | MHZ | GHZ] U [MA | DB | RI] [R 50]

2. Measurement frequencies in ascending order are specified in the following form:

uncuncuncunc .

The s-parameters uncertainties are forwarded as follows:

• as extended absolute uncertainties (

and

s , for instance 0.015,

• as extended uncertainties ( 2=k ) in dB for the magnitude of transmission parameters

and

s , for instance 0.015.

3. Comments: Any line starting with an exclamation mark (!) is interpreted as a comment line.

2=k ) for the magnitude of reflection parameters

fsfsfsfsf

iiiii

22122111

Two additional values must be specified when the s-parameters are loaded: the lower and the upper nominal measurement limit of the sensor-twoport combination. If s-parameter correction is active, these values are transferred by the sensor in response to SYSTem:INFO? The values cannot always be derived from the lower or upper measurement limit of the sensor alone and from the loss or gain of the preconnected twoport. The upper measurement limit of the sensor-twoport combination may also be limited by the twoport's maximum power-handling capacity. Furthermore, the lower measurement limit may be raised not only by the loss but also by the inherent noise of the twoport. For this reason, these values must be entered manually.

NOTICE The upper nominal measurement limit of the sensor-twoport combination entered when

loading the s-parameters should be carefully specified, as automatic test systems may evaluate it and an incorrect value may cause the sensor and/or the twoport to be overloaded.

1172.9530.12 3.8 E-3

R&S NRP-Z81/-Z85/-Z86 Program module “Update S-Parameters”

Procedure

o load an s-parameter table into the calibration set of the sensor, proceed as follows:

1. Connect the sensor to the USB port of the PC and start the program module Update S- Parameters. The corresponding dialog window is opened (Fig. 3-3).

. Make sure Keep Current S-Parameter Data is deactivated.

3. Under S-Parameter File enter the search path and the name of the S2P file containing the parameters. Press the Browse... button to open a file-opening dialog where the S2P measurement data file can be easily selected.

4. Under Uncertainty File enter the search path and the name of the measurement uncertainty file containing the measurement uncertainty of the s-parameter test system. Press the Browse... button to open a file-opening dialog where the measurement uncertainty file can be easily selected.

5. Enter the upper and lower nominal measurement limit of the sensor-twoport combination in the Lower Power Limit and Upper Power Limit fields.

6. Enter a name for the loaded s-parameter set in the S-Parameter Device Mnemonic field. This name can later be queried with SYSTem:INFO? "SPD Mnemonic" and is displayed on the NRP basic unit when s-parameter correction is switched on.

7. Activate S-Parameter Correction on by Default if the SENSe:CORRection:SPDevice:STATe switch should be automatically set to ON when the sensor is put into operation.

8. Designations for calibration laboratory and person responsible for calibration may be entered in the Calibration Lab and Calibration Engineer fields. These designations are stored in the calibration data set. They are implicitly set to „user lab“ and „user“, respectively, if the fields are left blank.

9. Press Start for loading. (The dialog is closed with OK and the set parameters are retained. When the dialog is exited with Cancel, all parameter modifications are ignored.)

Fig. 3-3 Dialog window for loading an s-parameter table

During loading, the current calibration data set of the sensor is overwritten. To be on the safe side, a backup copy of the current calibration data set is therefore automatically stored before s-parameters are loaded. The names of the backup files have the structure <type>_<batch number>_<date>_<time>.bak, where <type> is the sensor type, <batch number> is the batch number of the sensor, <date> the date of the s-parameter update in yyyymmdd format and <time> the time of the s-parameter update in the

1172.9530.12 3.9 E-3

Program module “Update S-Parameters” R&S NRP-Z81/-Z85/-Z86

format hhmmss. By default, a subdirectory named “Backup” is created for the backup files in the program directory. With Select Backup Directory … it is possible to select a different directory.

Store the automatically created backup files on a separate data medium (e.g. diskette,

D-ROM or network drive) and, if required, assign a meaningful name to them to simplify

C reloading. With the aid of these files, a previously used calibration data set of the sensor can be restored.

To reload the backup file of a calibration data set into the sensor, proceed as follows:

1. Press the Restore... button. The Restore S-Parameters window is opened (Fig. 3-4).

2. Enter the search path and the name of the backup file in the Backup File field. Press the Browse... button to open a dialog where the backup file can be easily selected.

3. Press OK to start the restore procedure. (With Cancel the dialog window is exited without data being restored).

Fig. 3-4 Dialog window for loading the backup file of a calibration data set

To be able to determine if the s-parameter correction is active after plugging in or resetting the sensor, proceed as follows:

1. Connect the sensor to the USB port of the PC and start the program module Update S- Parameters.

2. Make sure Keep Current S-Parameter Data is activated (Fig. 3-5).

3. Activate S-Parameter Correction on by Default if the SENSe:CORRection:SPDevice:STATe switch should be automatically set to ON when the sensor is put into operation, otherwise deactivate it.

4. Press Start for loading.

1172.9530.12 3.10 E-3

R&S NRP-Z81/-Z85/-Z86 Program module “Update S-Parameters”

Fig. 3-5 Subsequently changing the default behaviour of the s-parameter correction

1172.9530.12 3.11 E-3

R&S NRP-Z81/-Z85/-Z86 Table of Contents Chapter 5

Table of Contents

5 Remote Control – Fundamentals .................................................................................5.1

1172.9530.12 I-5.1 E-3

R&S NRP-Z81/-Z85/-Z86 Remote Control – Fundamentals

5 Remote Control – Fundamentals

Rohde & Schwarz recommends to utilize the VXI Plug & Play Driver for the remote control of R&S NRP power sensors. This driver can be found on the CD-ROM supplied with the sensor or downloaded in its most recent version via the internet (http://rohde-schwarz.com/).

The old remote control interface provided by the Dynamic Link Library NrpControl.dll is not developed further, but remains on the CD-ROM and can be downloaded via the internet.

1172.9530.12 5.1 E-3

R&S NRP-Z81/-Z85/-Z86 Table of Contents Chapter 6

Table of Contents

6 Remote Control – Commands .......................................................................................6.1

Notation .............................................................................................................................................6.1

Commands as per IEEE 488.2 .........................................................................................................6.2

*IDN? – Identification Query .......................................................................................................6.2

*RST – Reset ..............................................................................................................................6.2

*TRG – Trigger ............................................................................................................................6.2

*TST? – Self Test Query .............................................................................................................6.2

SCPI Commands ...............................................................................................................................6.3

CALibration .................................................................................................................................6.3

CALibration:DATA[?] <calibration data set as definite length block> ...........................6.3

CALibration:DATA:LENGth? ...........................................................................................6.3

CALibration:ZERO:AUTO[?] LFR | UFR | ONCE .........................................................6.3

CALibration:ZERO:FAST:AUTO[?] ONCE ...................................................................6.4

SENSe (Sensor Configuration) ...................................................................................................6.5

SENSe:AUXiliary[?] NONE | MINMAX | RNDMAX .....................................................6.10

SENSe:AVERage:COUNt[?] 1 to 220 ..........................................................................6.10

SENSe:AVERage:COUNt:AUTO[?] OFF | ON | ONCE ..............................................6.10

SENSe:AVERage:COUNt:AUTO:MTIMe[?] 1.0 to 999.99 .........................................6.11

SENSe:AVERage:COUNt:AUTO:NSRatio[?] 0.0001 to 1.0 .......................................6.11

SENSe:AVERage:COUNt:AUTO:RESolution[?] 1 to 4 ..............................................6.11

SENSe:AVERage:COUNt:AUTO:SLOT[?] 1 to <SENSe:POWer:TSLot:AVG:COUNt> ....6.11

SENSe:AVERage:COUNt:AUTO:TYPE[?] RESolution | NSRatio ..............................6.11

SENSe:AVERage:RESet ..............................................................................................6.12

SENSe:AVERage:STATe[?] OFF | ON ......................................................................6.12

SENSe:AVERage:TCONtrol[?] MOVing | REPeat......................................................6.12

SENSe:BWIDth:VIDeo[?] "300 kHz" | "1.5 MHz" | "5 MHz" | "FULL" ...........................6.13

SENSe:BWIDth:VIDeo:LIST? .......................................................................................6.13

SENSe:CORRection:DCYCle[?] 0.001 to 99.999 .......................................................6.13

SENSe:CORRection:DCYCle:STATe[?] OFF | ON ....................................................6.13

SENSe:CORRection:OFFSet[?] –200.0 to 200.0 .......................................................6.14

SENSe:CORRection:OFFSet:STATe[?] OFF | ON ....................................................6.14

SENSe:CORRection:SPDevice:LIST? .........................................................................6.14

SENSe:CORRection:SPDevice:SELect[?] <device_number> ...................................6.14

SENSe:CORRection:SPDevice:STATe[?] OFF | ON .................................................6.15

SENSe:FREQuency[?] 50.0e6 to 18.0e9 (NRP-Z81), …40.0e9 (NRP-Z85,

NRP-Z86 Var. 40) or …44.0e9 (NRP-Z85, NRP-Z86 Var. 44) .....................................6.15

SENSe:FUNCtion[?] <sensor_function> .....................................................................6.15

SENSe:POWer:AVG:APERture[?] 1.0e-6 … 1.0 ........................................................6.18

SENSe:POWer:AVG:BUFFer:SIZE[?] 1 to 8192 ........................................................6.19

SENSe:POWer:AVG:BUFFer:STATe[?] OFF | ON ....................................................6.19

SENSe:POWer:AVG:SMOothing:STATe[?] OFF | ON ...............................................6.19

SENSe:POWer:BURSt:DTOLerance[?] 0.0 to 0.3 .....................................................6.19

SENSe:POWer:TSLot[:AVG]:COUNt[?] 1 to 16 .........................................................6.20

1172.9530.12 I-6.1 E-6

Table of Contents Chapter 6 R&S NRP-Z81/-Z85/-Z86

SENSe:POWer:TSLot[:AVG][:EXCLude]:MID:OFFSet[:TIME][?] 0.0 to 0.1 ..............6.20

SENSe:POWer:TSLot[:AVG][:EXCLude]:MID:TIME[?] 0.0 to 0.1 ..............................6.21

SENSe:POWer:TSLot[:AVG]:WIDTh[?] 50e-9 to 0.1 .................................................6.21

SENSe:SGAMma:CORRection:STATe[?] OFF | ON .................................................6.22

SENSe:SGAMma:MAGNitude[?] 0.0 to 1.0 ................................................................6.22

SENSe:SGAMma:PHASe[?] –360.0 to 360.0.............................................................6.23

SENSe:STATistics[:EXCLude]:MID:OFFSet[:TIME][?] 0.0 to 0.3 ..............................6.23

SENSe:STATistics[:EXCLude]:MID:TIME[?] 0.0 to 0.3 ..............................................6.23

SENSe:STATistics:OFFSet:TIME[?] 0.0 to 10.0 ........................................................6.23

SENSe:STATistics:SCALe:X:MPWidth? ......................................................................6.23

SENSe:STATistics:SCALe:X:POINts[?] 3 to 8191 .....................................................6.23

SENSe:STATistics:SCALe:X:RANGe[?] 0.01 to 100 .................................................6.24

SENSe:STATistics:SCALe:X:RLEVel[?] –80 to +20...................................................6.24

SENSe:STATistics:TIME[?] 10.0e-6 to 0.3 .................................................................6.24

SENSe:TIMing:EXCLude:STARt[?] 0.0 to 10 .............................................................6.24

SENSe:TIMing:EXCLude:STOP[?] 0.0 to 51.2e-6 .....................................................6.24

SENSe:TRACe:AVERage:COUNt[?] 1 to 65536 ........................................................6.25

SENSe:TRACe:AVERage:STATe[?] OFF | ON ..........................................................6.26

SENSe:TRACe:AVERage:TCONtrol[?] MOVing | REPeat .........................................6.26

SENSe:TRACe:ESAMpling:AUTO[?] OFF | ON .........................................................6.27

SENSe:TRACe:MEASurement:ALGorithm [?] HISTogram | INTegration | PEAK .....6.27

SENSe:TRACe:MEASurement:AUTO[?] OFF | ON ...................................................6.27

SENSe:TRACe:MEASurement:DEFine:DURation:REFerence[?] 0.0 … 100.0 .........6.28

SENSe:TRACe:MEASurement:DEFine:TRANsition:HREFerence[?] 0.0 … 100.0 ....6.28

SENSe:TRACe:MEASurement:DEFine:TRANsition:LREFerence[?] 0.0 … 100.0 ....6.28

SENSe:TRACe:MEASurement:OFFSet:TIME[?] –x to 10.0 .......................................6.28

SENSe:TRACe:MEASurement:POWer:AVG? .............................................................6.28

SENSe:TRACe:MEASurement:POWer:HREFerence? ................................................6.28

SENSe:TRACe:MEASurement:POWer:LREFerence? .................................................6.29

SENSe:TRACe:MEASurement:POWer:MAX? .............................................................6.29

SENSe:TRACe:MEASurement:POWer:MIN? ..............................................................6.29

SENSe:TRACe:MEASurement:POWer:PULSe:BASE? ...............................................6.30

SENSe:TRACe:MEASurement:POWer:PULSe:TOP? .................................................6.30

SENSe:TRACe:MEASurement:POWer:REFerence? ...................................................6.30

SENSe:TRACe:MEASurement:PULSe:DCYCle? ........................................................6.30

SENSe:TRACe:MEASurement:PULSe:DURation? ......................................................6.30

SENSe:TRACe:MEASurement:PULSe:PERiod? .........................................................6.30

SENSe:TRACe:MEASurement:PULSe:SEParation? ...................................................6.30

SENSe:TRACe:MEASurement:STATe[?] OFF | ON ..................................................6.31

SENSe:TRACe:MEASurement:TIME[?] 0.0 … 10.0 ..................................................6.31

SENSe:TRACe:MEASurement:TRANsition:ESAMpling:AUTO[?] OFF | ON .............6.31

SENSe:TRACe:MEASurement:TRANsition:NEGative:DURation? ..............................6.31

SENSe:TRACe:MEASurement:TRANsition:NEGative:OCCurrence? ..........................6.31

SENSe:TRACe:MEASurement:TRANsition:NEGative:OVERshoot? ...........................6.32

SENSe:TRACe:MEASurement:TRANsition:POSitive:DURation? ................................6.32

SENSe:TRACe:MEASurement:TRANsition:POSitive:OCCurrence? ...........................6.32

1172.9530.12 I-6.2 E-6

R&S NRP-Z81/-Z85/-Z86 Table of Contents Chapter 6

SENSe:TRACe:MEASurement:TRANsition:POSitive:OVERshoot? ............................6.32

SENSe:TRACe:MEASurement:TRANsition:SPERiod? ................................................6.32

SENSe:TRACe:MPWidth? ............................................................................................6.32

SENSe:TRACe:OFFSet:TIME[?] –x to 10.0 ...............................................................6.33

SENSe:TRACe:POINts[?] 3 to 8192 ...........................................................................6.33

SENSe:TRACe:POINts:FPGA? ....................................................................................6.33

SENSe:TRACe:TIME[?] 50e-9 to 1 ............................................................................6.34

SENSe:TRACe:TIME:FPGA? .......................................................................................6.34

SYSTem ....................................................................................................................................6.35

SYSTem:FEATures? ....................................................................................................6.35

SYSTem:INFO? [Item] ..................................................................................................6.35

SYSTem:INITialize ........................................................................................................6.37

SYSTem:LIMits? ...........................................................................................................6.37

SYSTem:MINPower? ....................................................................................................6.37

SYSTem:RUTime 0 to 10.0 ........................................................................................6.37

SYSTem:SUTime 0 to 10.0.........................................................................................6.38

SYSTem:TRANsaction:BEGin ......................................................................................6.38

SYSTem:TRANsaction:END .........................................................................................6.38

TEST .........................................................................................................................................6.39

TEST:SENSor? .............................................................................................................6.39

TRIGger ....................................................................................................................................6.40

ABORt ...........................................................................................................................6.40

INITiate:CONTinuous[?] OFF | ON .............................................................................6.40

INITiate:IMMediate ........................................................................................................6.41

TRIGger:ALEVel:STATe[?] OFF | ON ........................................................................6.41

TRIGger:ATRigger:STATe[?] OFF | ON .....................................................................6.41

TRIGger:COUNt[?] 1 to 231 .........................................................................................6.42

TRIGger:DELay[?] –x to 10.0 .....................................................................................6.42

TRIGger:DTIME[?] 0.0 to 10.0 ....................................................................................6.43

TRIGger:HOLDoff[?] 0.0 to 10.0 .................................................................................6.43

TRIGger:HYSTeresis[?] 0.0 to 10.0 ............................................................................6.44

TRIGger:IMMediate ......................................................................................................6.44

TRIGger:LEVel[?] 1.0e-6 to 0.1 ..................................................................................6.44

TRIGger:MASTer:STATe[?] OFF | ON .......................................................................6.44

TRIGger:SLOPe[?] POSitive | NEGative ....................................................................6.45

TRIGger:SOURce[?] HOLD | IMMediate | INTernal | BUS | EXTernal .......................6.45

TRIGger:SYNChronisation:STATe OFF | ON .............................................................6.45

List of Remote-Control Commands ..............................................................................................6.46

1172.9530.12 I-6.3 E-6

List of Figs. and Tables Chapter 6 R&S NRP-Z81/-Z85/-Z86

Figs.

Fig. 6-1 Effect of SENSe:POWer:BURSt:DTOLerance ...............................................................6.20

Fig. 6-2 Effect of an exclusion interval in the Timeslot mode.......................................................6.21

Fig. 6-3 Correction of interactions between the power sensor and the signal source .................6.22

Fig. 6-4 Correction of interactions between the power sensor, the signal source,

and the s-parameter device ............................................................................................6.22

Fig. 6-5 Effect of SENSe:TIMing:EXCLude:STARt and :STOP in the Burst Average mode .......6.25

Fig. 6-6 Effect of SENSe:TIMing:EXCLude:STARt and :STOP in the Timeslot mode ................6.25

Fig. 6-7 Magnitude parameters of a trace ....................................................................................6.29

Fig. 6-8 Time parameters and reference levels of a trace ...........................................................6.29

Fig. 6-9 Effect of the dropout time parameter ..............................................................................6.43

Tables

Table 6-1 Commands of the CALibration group ...............................................................................6.3

Table 6-2 Commands of the SENSe system ....................................................................................6.5

Table 6-3 Video bandwidth and resulting sampling rate and interval .............................................6.13

Table 6-4 Measurement modes ......................................................................................................6.15

Table 6-5 SYSTem command group ...............................................................................................6.35

Table 6-6 Meaning of Item in the SYSTem:INFO? command ........................................................6.35

Table 6-7 TEST command group ....................................................................................................6.39

Table 6-8 TRIGger command group ...............................................................................................6.40

Table 6-9 List of remote-control commands ....................................................................................6.46

1172.9530.12 6.4 E-6

R&S NRP-Z81/-Z85/-Z86 Remote Control - Commands

Command tables

For a quick overview of available commands, the commands are listed in a table before they are described. These tables contain the following four columns:

Command:

Commands and their tree structure

Parameters:

Possible parameters

Unit:

The basic unit of the physical parameters (must not be sent with parameters)

Remarks:

Identification of all commands

 that have no query form  that are available as query only

Indentations

The various levels of the SCPI command hierarchy are shown in the table by right indentations. The lower the level, the greater the indentation to the right. It should be noted that the complete notation of the command includes the higher levels too.

Example:

SENSe:AVERage:COUNt is represented in the table as follows: SENSe first level

:AVERage second level :COUNt third level

In the individual description, the command is shown full length. An example of the command is given at the end of the description.

[?] ?

A question mark in square brackets at the end of a command indicates that this command can either be used as a setting command (without question mark) or as a query (with question mark). If the question mark is not in square brackets, the command is a query only.

Example:

SENSe:POWer:AVG:APERture[?] SENSe:POWer:AVG:APERture 1e-3 sets the length of the sampling window to

1 ms.

SENSe:POWer:AVG:APERture? returns the currently set length as a response. *IDN? queries the sensor identification string which, of course, cannot be changed.

For this reason, this command is only available as a query.

Special character | between parameters

A vertical bar between parameters is used to separate alternative options (ORing).

Example:

NITiate:CONTinuous OFF | ON Either OFF or ON can be entered.

{numeric expression}

A numeric expression in curly brackets means that it has been rounded to the nearest integer.

The current value of a parameter or variable is represented by placing the parameter or variable in triangular brackets.

6 Remote Control – Commands

Notation

In the following sections, all commands implemented in the sensor are first listed in a table according to command systems and are then described in detail. The notation is largely in line with the SCPI standard.

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Remote Control - Commands R&S NRP-Z81/-Z85/-Z86

Commands as per IEEE 488.2

The power sensor supports a subset of the possible setting commands and queries (common commands and queries) in line with IEEE 488.2.

*IDN? – Identification Query

*IDN? returns a string identifying the sensor (device identification code). The version number of the installed firmware is indicated. The string for a sensor of type R&S NRP-Z81 has the following structure:

ROHDE&SCHWARZ,NRP-Z81,<serial number>,<firmware version> <serial number>: serial number in ASCII

<firmware version>: firmware version number in ASCII

*RST – Reset

*RST sets the sensor to the default state, i.e. the default settings for all test parameters are loaded.

*TRG – Trigger

*TRG triggers a measurement. For this purpose, the sensor must be in the WAIT_FOR_TRIGGER state and the source for the trigger event must be set to BUS (TRIGger:SOURce BUS).

*TST? – Self Test Query

*TST? starts a selftest and returns 0 (no error found) or 1 (an error has occurred). The selftest comprises the following functions:

 RAM test  Operating voltages  Temperature measurement  Calibration data set  Noise  Zero-point offsets

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R&S NRP-Z81/-Z85/-Z86 Remote Control - Commands

Command

Parameter

Unit

Remarks

CALibration

:DATA[?]

:LENGth?

Bytes

Query only

:ZERO

:AUTO[?]

LFR | UFR | ONCE

:FAST:AUTO[?]

ONCE

Only in Trace or Statistics mode

SCPI Commands

The R&S NRP-Z81/85/86 power sensor is controlled via the command groups

 CALibration (zeroing)  SENSe (measurement configurations)  SYSTem  TRIGger  SERVice

CALibration

Table 6-1 Commands of the CALibration group

CALibration:DATA[?] <calibration data set as definite length block>

CALibration:DATA is used to write a calibration data set to the sensor’s flash memory. The query returns the calibration data set currently stored in the flash memory as a definite length

block.

CALibration:DATA:LENGth?

CALibration:DATA:LENGth? returns the length in bytes of the calibration data set currently stored in the flash memory. Programs that read out the calibration data set can use this information to determine the capacity of the buffer memory required.

CALibration:ZERO:AUTO[?] LFR | UFR | ONCE

These commands zero the sensor. For this purpose, the test signal must be deactivated or the sensor disconnected from the signal source. The sensor automatically detects the presence of any significant power to be measured. This causes zeroing to be aborted and the error message NRPERROR_CALZERO to be output.

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Remote Control - Commands R&S NRP-Z81/-Z85/-Z86

Repeat zeroing

 during warm-up after switching on the R&S NRP or connecting the sensor  after a substantial change in the ambient temperature  after connecting the sensor to an RF connector if the ambient temperature is high  after several hours in operation  when very low-power signals are to be measured, e.g. less than 10 dB above the

lower measurement limit of the sensor

When zeroing, preferably switch off the test signal and do not remove the sensor from the signal source. Apart from keeping the thermal balance, this has the advantage that the noise superimposed on the test signal (e.g. from a broadband amplifier) can be detected on zeroing and does not impair the measurement result.

Full zeroing, covering all measurement modes and the entire frequency range, can be carried out with the ONCE parameter. Usually, this takes eight seconds. There are a number of ways to reduce the time

taken. Zeroing can be limited to the frequency range <500 MHz or 500 MHz by using the parameters LFR (lower frequency range) and UFR (upper frequency range), cutting the zeroing time by half. Zeroing is even faster if performed only in the Trace mode and the Statistics modes (20 ms – see the command group CALibration:ZERO:FAST:AUTO).

The query always returns 1.

Default setting

After a power-on reset, the zero offsets stored in the data memory of the sensor are used as corrections. Since they were determined after sensor warm-up during factory calibration, only moderate zero errors are to be expected if no zeroing is performed. After initialization of the sensor by means of *RST or SYSTem:INITialize, the current zero setting remains unchanged.

CALibration:ZERO:FAST:AUTO[?] ONCE

The command CALibration:ZERO:FAST:AUTO ONCE performs fast zeroing, but can be called only in

the sensor’s Trace mode and Statistics modes. In any other measurement mode, the error message NRPERROR_CALZERO is output. Even though the execution time is shorter than that for standard

zeroing by a factor of 100 or more, measurement accuracy is not affected. Fast zeroing is available for the entire frequency range.

The query always returns 1.

Default setting

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R&S NRP-Z81/-Z85/-Z86 Remote Control - Commands

Command

Parameter

Unit

Remarks

SENSe

:AUXiliary[?]

NONE | MINMAX | RNDMAX

:AVERage

:COUNt[?]

1 to 220

:AUTO[?]

OFF | ON | ONCE

:MTIMe[?]

1.0 to 999.99

s :NSRatio[?]

0.0001 to 1.0

:RESolution[?]

1 to 4

:SLOT[?]

1 to <SENSe:POWer:TSLot:AVG:COUNt>

:TYPE[?]

RESolution | NSRatio

:RESet

No query

:STATe[?]

OFF | ON

:TCONtrol[?]

MOVing | REPeat

:BWIDth

:VIDeo[?]

"300 kHz" | "1.5 MHz" | "5 MHz" | "FULL"

:LIST?

Query only

:CORRection

:DCYCle[?]

0.001 to 99.999

:STATe[?]

OFF | ON

:OFFSet[?]

-200.0 to 200.0

dB :STATe[?]

OFF | ON

:SPDevice

:LIST?

Query only

:SELect[?]

1 to x

:STATe[?]

OFF | ON

SENSe (Sensor Configuration)

The sensor is configured by means of the commands in the SENSe and TRIGger groups.

Table 6-2 Commands of the SENSe system

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Remote Control - Commands R&S NRP-Z81/-Z85/-Z86

Command

Parameter

Unit

Remarks

:FREQuency[?]

50.0e6 to 18.0e9 (NRP-Z81), ...40.0e9 (NRP-Z85, NRP-Z86 Var. 40) or ...44.0e9 (NRP-Z85, NRP-Z86 Var. 44)

:FUNCtion[?]

:POWer

:AVG

:APERture[?]

1.0e-6 to 1.0

s :BUFFer

:SIZE[?]

1 to 8192

:STATe[?]

OFF | ON

:SMOothing:STATe[?]

OFF | ON

:BURSt

:DTOLerance[?]

0.0 to 0.3

s :TSLot[:AVG]

:COUNt[?]

1 to 16

[:EXCLUDE]:MID

:OFFSet[:TIME][?]

0.0 to 0.1

:TIME[?]

0.0 to 0.1

:WIDTh[?]

50.0e-9 to 0.1

s :SGAMma

:CORRection:STATe[?]

OFF | ON

:MAGNitude[?]

0.0 to 1.0

:PHASe[?]

-360.0 to 360.0

degree

:STATistics

[:EXCLude]:MID

:OFFSet[:TIME][?]

0 to 0.3

s :TIME[?]

0 to 0.3

s :OFFSet:TIME[?]

0 to 10.0

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R&S NRP-Z81/-Z85/-Z86 Remote Control - Commands

Command

Parameter

Unit

Remarks

:SCALe:X

:MPWidth?

Query only

:POINts[?]

3 to 8191

:RANGe[?]

0.01 to 100.0

dB :RLEVel[?]

–80 to +20

dBm :TIME[?]

10.0e-6 to 0.3

s :TIMing

:EXCLude

:STARt[?]

0.0 to 10.0

:STOP[?]

0.0 to 51.2e-6

s :TRACe

:AVERage

:COUNt[?]

1 to 65536

:STATe[?]

OFF | ON

:TCONtrol[?]

MOVing | REPeat

:ESAMpling:AUTO[?]

OFF | ON

:MEASurement

:ALGorithm[?]

HISTogram | INTegration | PEAK

:AUTO[?]

OFF | ON

:DEFine

:DURation

:REFerence[?]

0.0 … 100.0

% :TRANsition

:LREFerence[?]

0.0 … 100.0

:HREFerence[?]

0.0 … 100.0

:OFFSet:TIME[?]

0.0 … 10.0

:POWer

:MIN?

W Query only

:MAX?

W Query only

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Remote Control - Commands R&S NRP-Z81/-Z85/-Z86

Command

Parameter

Unit

Remarks

:AVG?

W Query only

:PULSe

:TOP?

W Query only

:BASE?

W Query only

:LREFerence?

W Query only

:HREFerence?

W Query only

:REFerence?

W Query only

:PULSe

:DCYCle?

% Query only

:DURation?

s Query only

:PERiod?

s Query only

:SEParation?

s Query only

:STATe[?]

OFF | ON

:TIME[?]

0.0 … 10.0

0.0 = disabled

:TRANsition

:ESAMpling:AUTO[?]

OFF | ON

:NEGative

:DURation?

s Query only

:OCCurrence?

s Query only

:OVERshoot?

% Query only

:POSitive

:DURation?

s Query only

:OCCurrence?

s Query only

:OVERshoot?

% Query only

:SPERiod?

s Query only

:MPWidth?

s Query only

:OFFSet:TIME[?]

x to 10.0

s :POINts[?]

3 to 8192

:FPGA?

Query only

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R&S NRP-Z81/-Z85/-Z86 Remote Control - Commands

Command

Parameter

Unit

Remarks

:TIME[?]

50e-9 to 1

:FPGA?

s Query only

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Remote Control - Commands R&S NRP-Z81/-Z85/-Z86

The averaging function must be activated with SENSe:AVERage:STATe ON so that the set averaging factor becomes effective.

SENSe:AUXiliary[?] NONE | MINMAX | RNDMAX

This command is used to define which measurement results are to be made available in addition to the average power (in the Timeslot Average and Trace modes: in addition to the average power of each timeslot or pixel, respectively).

 NONE: Only the average power of the associated samples is provided.  MINMAX: The maximum and minimum are additionally provided.  RNDMAX: The maximum and a random sample are additionally provided.

The query returns

 1 for NONE,  2 for MINMAX  4 for RNDMAX

Default setting: RNDMAX

SENSe:AVERage:COUNt[?] 1 to 220

SENSe:AVERage:COUNt sets the number of measured values that have to be averaged to form the measurement result in the modes Continuous Average, Burst Average, or Timeslot Average. The greater this averaging factor, the less the measured values fluctuate and the longer the measurement time. The parameter is rounded to the nearest power-of-two. If an averaging factor of two ore more has been chosen, the measurement is performed with chopper-stabilization in the Burst Average and Timeslot Average modes. Chopper stabilization is always activated in the Continuous Average mode.

The query returns the averaging factor that has been set.

Default setting: 1024

SENSe:AVERage:COUNt:AUTO[?] OFF | ON | ONCE

SENSe:AVERage:COUNt:AUTO ON activates auto-averaging in the modes Continuous Average, Burst Average and Timeslot Average. SENSe:AVERage:COUNt :AUTO OFF deactivates it. If auto-averaging

is activated, the averaging factor is continuously determined and set according to the power level and other parameters. On deactivation, the previous, automatically determined averaging factor is used in the fixed-filter mode. The SENSe:AVERage:COUNt:AUTO ONCE command ensures that a new averaging factor is determined by the automatic filter function under the current measurement conditions and is used in the fixed-filter mode.

In the Burst Average and Timeslot Average modes, a minimum value of two is selected for the averaging factor. This prevents implicit deactivation of chopper stabilization in course of automatic averaging.

The query returns

 1 for OFF  2 for ON

Default setting: OFF

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R&S NRP-Z81/-Z85/-Z86 Remote Control - Commands

SENSe:AVERage:COUNt:AUTO:MTIMe[?] 1.0 to 999.99

SENSe:AVERage:COUNt:AUTO:MTIMe sets an upper limit for the settling time of the auto-averaging filter in the NSRatio mode and thus limits the length of the filter.

The query returns the time that has been set.

Default setting: 4 [s]

SENSe:AVERage:COUNt:AUTO:NSRatio[?] 0.0001 to 1.0

SENSe:AVERage:COUNt:AUTO:NSRatio sets an upper limit for the relative noise content of the measurement result in the NSRatio auto-averaging mode. The relative noise content is defined as the magnitude in dB of the level variation caused by the inherent noise of the sensor (two standard deviations).

The query returns the set relative noise content.

Default setting: 0.01 [dB]

SENSe:AVERage:COUNt:AUTO:RESolution[?] 1 to 4

SENSe:AVERage:COUNt:AUTO:RESolution sets the resolution index for the automatic averaging filter if it is operated in the RESolution mode. The resolution index is greater by a value of 1 than the number of decimal places that have to be taken into account to further process the measurement result in dBm, dBµV or dB. The design of the RESolution mode is similar to that of its predecessors R&S NRVS and R&S NRVD or other commercial power meters. The higher the selected index, the better the measurement result is filtered. However, it cannot be ensured that the least significant digit (e.g.

0.01 dB with an index of 3) remains stable. The NSRatio setting is recommended instead. The query returns the set resolution index.

Default setting: 3

SENSe:AVERage:COUNt:AUTO:SLOT[?] 1 to <SENSe:POWer:TSLot:AVG:COUNt>

SENSe:AVERage:COUNt:AUTO:SLOT defines a timeslot whose power is used as a reference for the auto-averaging filter in the Timeslot mode. The reference timeslot is addressed via a number, the numbers starting at 1. This number must not exceed the total number of timeslots which can be set with the SENSe:POWer:TSLot[:AVG]:COUNt command. If the total number is reduced to a value that is smaller than the reference-timeslot number, then the timeslot with the highest number is automatically chosen as a reference.

The query returns the reference-timeslot number.

Default setting: 1

SENSe:AVERage:COUNt:AUTO:TYPE[?] RESolution | NSRatio

SENSe:AVERage:COUNt:AUTO:TYPE defines the operating mode of the automatic averaging filter in the Continuous Average, Burst Average or Timeslot Average modes. The RESolution parameter sets an operating mode that is usually implemented in power meters; NSRatio ensures that the noise content of the measurement result does not exceed a predefined limit.

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Remote Control - Commands R&S NRP-Z81/-Z85/-Z86

The query returns

 1 for RESolution  2 for NSRatio

Default setting: RESolution

SENSe:AVERage:RESet

SENSe:AVERage:RESet initializes the averaging filter in the Continuous Average, Burst Average or Timeslot Average measurement modes. This is useful if the averaging filter is operated in the SENSe:AVERage :TCONtrol MOVing filter mode and a high averaging factor has been set. In this case,

rapid changes in the measured power will be delayed to such an extent that the advantage of the MOVing filter mode is lost. The SENSe:AVERage:RESet command solves this problem by initially setting the length of averaging filter to a minimum value and filling it with the current measured value. The averaging factor is then automatically increased to its final value which is determined by the SENSe:AVERage:COUNt command. In this way, changes in the measurement result become quickly apparent and fluctuations in the measurand are still filtered out in accordance with the set averaging factor. However, this procedure does not reduce the time required to obtain a fully settled reading.

SENSe:AVERage:STATe[?] OFF | ON

SENSe:AVERage:STATe switches the averaging filter for the Continuous Average, Burst Average or Timeslot Average modes on or off. If an averaging factor of two ore more has been chosen, the

measurement is performed with chopper-stabilization in the Burst Average and Timeslot Average modes. Chopper stabilization is always activated in the Continuous Average mode.

The query returns

 1 for OFF  2 for ON

Default setting: ON

SENSe:AVERage:TCONtrol[?] MOVing | REPeat

SENSe:AVERage:TCONtrol (terminal control) defines the behavior of the averaging filter in the Continuous Average, Burst Average or Timeslot Average modes.

When the REPeat parameter is included, a measurement result is output after the averaging filter has been completely filled with new measured values. This ensures that a settled result is output. Very long measurement times may be the consequence of large averaging factors.

When the MOVing parameter is used in a setting command, a moving average is formed, which means that with every new measured value, a new output value is also available. This is advantageous if a large averaging factor has been selected, as trends emerge quickly and there is no need to wait for the full settling time to elapse. The output rate can be varied over a wide range to prevent an intermediate result overload (see the SYStem:RUTime command).

The query returns

 1 for MOVing  2 for REPeat

Default setting: REPeat

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R&S NRP-Z81/-Z85/-Z86 Remote Control - Commands

Video

bandwidth

Sampling

rate

Sampling

interval

"Full"

8107 s

-1

12.5 ns

"5 MHz"

4107 s

-1

25 ns

"1.5 MHz"

1107 s

-1

100 ns

"300 kHz"

2,5106 s

-1

400 ns

SENSe:BWIDth:VIDeo[?] "300 kHz" | "1.5 MHz" | "5 MHz" | "FULL"

This command can be used to reduce the video bandwidth for the Trace and Statistics modes. As a result, trigger sensitivity is increased and the display noise reduced. To prevent signals from being corrupted, the selected video bandwidth should not be smaller than the RF bandwidth of the measurement signal. The "FULL" setting corresponds to a video bandwidth of at least 30 MHz if there is an associated frequency setting ( SENSe:FREQuency command) greater than or equal to 500 MHz. If a frequency below 500 MHz is set and the video bandwidth is set to "FULL", the video bandwidth is automatically reduced to approx. 7.5 MHz.

If the video bandwidth is limited with the SENSe:BWIDth:VIDeo command, the sampling rate is also automatically reduced, i.e. the effective time resolution in the Trace mode is reduced accordingly. In the Statistics modes, the measurement time must be increased appropriately if the required sample size is to be maintained:

Table 6-3 Video bandwidth and resulting sampling rate and interval

The sampling interval can be queried with the SENSe:TRACe:MPWidth? command.

Default setting: "FULL"

SENSe:BWIDth:VIDeo:LIST?

This query command outputs all available video-bandwidth settings.

SENSe:CORRection:DCYCle[?] 0.001 to 99.999

SENSe:CORRection:DCYCle sets the duty cycle as a percentage when pulse-modulated signals are corrected. With the correction activated, the sensor calculates pulse power from the duty cycle and average power. The duty cycle is only evaluated in the Continuous Average mode.

The query returns the current duty cycle in percent.

Default setting: 1.0 [%]

SENSe:CORRection:DCYCle:STATe[?] OFF | ON

SENSe:CORRection:DCYCle:STATe ON activates duty cycle correction and thus pulse-power measurement, whereas SENSe:CORRection:DCYCle:STATe OFF deactivates it.

The query returns

 1 for OFF  2 for ON

Default setting: OFF

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Remote Control - Commands R&S NRP-Z81/-Z85/-Z86

SENSe:CORRection:OFFSet[?] –200.0 to 200.0

SENSe:CORRection:OFFSet defines a fixed offset in dB which is used to correct the measured value. (When a log scale is used, the offset is added to the measured value; this is the reason why the command has this name.)

The attenuation of an attenuator located ahead of the sensor or the coupling attenuation of a directional coupler is taken into account with a positive offset, i.e. the sensor calculates the power at the input of the attenuator or directional coupler. A negative offset can be used to correct the influence of an amplifier connected ahead.

The query returns the set offset in dB.

Default setting: 0.0 [dB]

SENSe:CORRection:OFFSet:STATe[?] OFF | ON

SENSe:CORRection:OFFSet:STATe ON activates the offset correction and SENSe:CORRection:OFFSet:STATe OFF deactivates it.

The query returns

 1 for OFF  2 for ON

Default setting: OFF

SENSe:CORRection:SPDevice:LIST?

Several S-parameter data sets can be loaded onto the R&S NRP-Z81/85/86 power sensor. This query command outputs a list of the data sets that have been loaded; the list indicates the consecutive number and mnemonic of each data set.

SENSe:CORRection:SPDevice:SELect[?] <device_number>

Several S-parameter data sets can be loaded onto the R&S NRP-Z81/85/86 power sensor. The SENSe:CORRection:SPDevice:SELect command can be used to select a loaded data set for Sparameter correction. This data set is accessed by means of a consecutive number, starting with 1 for the first data set. If an invalid data set consecutive number is entered, an error message is output.

The query command returns the consecutive number of the selected S-parameter data set.

Default setting:

When the S-parameter data sets are being loaded, the user can specify the S-parameter data set to be used as default setting.

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R&S NRP-Z81/-Z85/-Z86 Remote Control - Commands

<sensor_function>

Measurement mode designation

"POWer:AVG"

Continuous Average

"POWer:BURSt:AVG"

Burst Average

"POWer:TSLot:AVG"

Timeslot Average

"XTIMe:POWer"

Trace

"XPOWer:PDFunction”

Statistics (PDF)

"XPOWer:CCDFunction”

Statistics (CCDF)

SENSe:CORRection:SPDevice:STATe[?] OFF | ON

SENSe:CORRection:SPDevice:STATe ON activates S-parameter correction by setting the selected S-parameter data set (see the SENSe:CORRection:SPDevice:SELect command). The OFF parameter deactivates S-parameter correction.

S-parameter correction is used to compensate for a component (attenuator, directional coupler) connected ahead of the sensor by means of its S-parameter data set. The use of S-parameters instead of a fixed offset (see SENSe:CORRection :OFFSet command group) allows more precise measurements because the interaction between the sensor and the component can be taken into account. The R&S NRP-Z81/85/86 wideband power sensor contains no factory-set S-parameter data set. As a result, the SENSe:CORRection:SPDevice:STATe ON command generates an error message, if no user-defined data set is available. For detailed information on loading S-parameter data sets, see section 3.

The query returns

 1 for OFF  2 for ON

Default setting:

The sensor’s factory-set default setting is OFF. The default setting can be redefined when an S- parameter table is loaded (see section 3).

SENSe:FREQuency[?] 50.0e6 to 18.0e9 (NRP-Z81), …40.0e9 (NRP-Z85, NRP-Z86 Var. 40) or …44.0e9 (NRP-Z85, NRP-Z86 Var. 44)

SENSe:FREQuency transfers the carrier frequency of the RF signal to be measured to the sensor; this frequency is used for various corrections of the measurement result. When the R&S NRP- Z81/85/86 power sensor is used, it is essential that the current carrier frequency is set. Otherwise, non-linearities or temperature dependencies considerably greater than those stated in the data sheet can occur. If the frequency that is entered is below 500 MHz, the video bandwidth of the sensor is automatically reduced (see SENSe:BWIDth:VIDEo command). The center frequency is set for broadband signals (spread- spectrum signals, multicarrier signals), if there is no explicit carrier.

The query returns the set carrier frequency in Hz.

Default setting: 1.0e9 [Hz]

SENSe:FUNCtion[?] <sensor_function>

SENSe:FUNCtion <sensor_function> sets the sensor to one of the following measurement modes: Table 6-4 Measurement modes

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Remote Control - Commands R&S NRP-Z81/-Z85/-Z86

The query returns a string indicating the set measurement mode.

Default setting: "POWer:AVG"

Short description of the measurement modes

Continuous Average

In this mode, the average power of the measurement signal is asynchronously measured within definable time intervals (sampling windows). The width of a sampling window is set with the SENSe:POWer:AVG:APERture command. The measurements are performed with chopper stabilization to obtain more accurate results with reduced noise and zero offset. Therefore, a measurement is always performed over two sampling windows, the polarity of the detector output signal being reversed for the second window. By taking the difference of the output signals, the influence of the video path on noise and zero drift is minimized.

When the averaging function is activated, the averaging factor determines how often the described measurement cycle is repeated.

A measurement should be started with the command INITiate:IMMediate (once) or

INITiate:CONTinuous:ON (continuously), the trigger source being set to Immediate with the TRIGger:SOURce command (asynchronous measurement).

In addition to the average power, the following quantities can optionally be output:

 Maximum power  Minimum power  A randomly selected sample

The SENSe:AUXiliary command is used to make the selection.

Burst Average

This mode is used to measure the average power of bursts. The time interval in which power is measured starts when the power exceeds the trigger level and stops when the trigger logic detects the end of the pulse. To prevent power drops due to modulation being erroneously interpreted as an end of a pulse, the user must define a dropout tolerance with the SENSe:POWer:BURSt:DTOLerance command.

When the averaging function is activated (SENSe:AVERage:STATe ON), and an averaging factor of two ore more has been chosen, measurements are performed with chopper stabilization to obtain more accurate results with reduced noise and zero offset. The same holds true for activated automatic averaging. Chopper stabilization involves that the polarity of the detector output signal is reversed from burst to burst. By taking the difference of the output signals, the effect of the video path on noise and zero drift is minimized.

In the Burst Average mode, only internal trigger events (from the signal) are evaluated, irrespective of the setting of the TRIGger:SOURce parameter. The TRIGger:DELay setting is also ignored so that the measurement interval starts the instant the signal crosses the trigger threshold. A measurement is initiated with the command INITiate:IMMediate (once, irrespective of the number of repetitions required for chopper stabilization and averaging) or INITiate:CONTinuous:ON (continuously).

Time intervals that are to be excluded from measurement can be set at the beginning and at the end of the measurement interval (see commands SENSe:TIMing:EXCLude:STARt and SENSe:TIMing:EXCLude:STOP).

In addition to the average power, the following quantities can optionally be output:

 Maximum power  Minimum power  A randomly selected sample

The SENSe:AUXiliary command is used to make the selection.

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R&S NRP-Z81/-Z85/-Z86 Remote Control - Commands

Timeslot Average

The average power of a definable number of successive timeslots within a frame structure with equal spacing is measured. The width of one slot must be defined with SENSe:POWer:TSLot:WIDTh, the number of slots must be defined with SENSe:POWer:TSLot:COUNt. The limit is 16 for the R&S NRP-Z81/85/86 wideband power sensor. It is essential to define the TRIGger:DELay parameter to ensure that the beginning of the first slot to be measured coincides with the delayed trigger point. The measurement result is an array with the same number of elements as timeslots. Each element represents the average power in a particular timeslot.

When the averaging function is activated (SENSe:AVERage:STATe ON), and an averaging factor of two ore more has been chosen, measurements are performed with chopper stabilization to obtain more accurate results with reduced noise and zero offset. The same holds true for activated automatic averaging. Chopper stabilization involves that the polarity of the detector output signal is reversed from frame to frame. By taking the difference of the output signals, the effect of the video path on noise and zero drift is minimized.

Time intervals that are to be excluded from the measurement can be set at the beginning, in the middle and at the end of each timeslot (see commands SENSe:TIMing:EXCLude:STARt, SENSe:POWer:TSLot[:AVG][:EXCLUDE]:MID and SENSe:TIMing:EXCLude:STOP).

A measurement is initiated with the command INITiate:IMMediate (once, irrespective of the number of repetitions required for averaging) or INITiate:CONTinuous:ON (continuously). The trigger source must be set to INTernal or EXTernal with the TRIGger:SOURce command. After each occurrence of the trigger event, a measurement is performed in all timeslots. A trigger event must be available for each frame when averaging is being performed.

In addition to the average power, the following quantities can optionally be output for each timeslot:

 Maximum power  Minimum power  A randomly selected sample

The SENSe:AUXiliary command is used to make the selection.

Trace (XTIMe:POWer)

In the Trace mode, the envelope power can be recorded as a function of time. This is done by sampling power over a time interval that can be specified by the user (SENSe:TRACe:OFFSet:TIME and SENSe:TRACe:TIME commands) and then assigning the power values that have been determined to a number of pixels that are largely user-selectable (SENSe:TRACe:POINts command). The time interval represented by a pixel is obtained by dividing the trace length by N–1, where N is the number of pixels.

In the simplest case, each pixel is assigned a single sample value which fully characterizes it. If several sample values are assigned to a pixel, the following quantities can be determined for each time interval:

 Average power  Maximum power  Minimum power  A randomly selected sample

The SENSe:AUXiliary command is used to make the selection. Individual sample values cannot be accessed.

When the averaging function is deactivated (SENSe:TRACe:AVERage:STATe OFF) or an averaging factor of one has been selected, measurements are performed without chopper stabilization, i.e. a measurement consists of a single sampling sequence activated by a trigger event. Otherwise, the detector’s output-voltage polarity is reversed automatically for alternate sampling sequences. This suppresses low-frequency noise and increases the accuracy with which the average power is measured at each pixel. Averaging has no effect on the randomly selected samples; the largest values for each averaging sequence are output as peak values.

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In the Trace mode, the video bandwidth can be reduced step-by-step (SENSe:BWIDth:VIDeo command) to cut noise and increase trigger sensitivity.

Statistics (CCDF, PDF)

In both Statistics modes, either the complementary cumulative distribution function (CCDF) or the probability density function (PDF) of the envelope power can be measured The following measurement parameters can be set:

 Start of analysis window (STATistics:OFFSet:TIME command)  Length of analysis window (STATistics:TIME command)  Exclusion period within analysis window (STATistics[:EXCLude]:MID command group)  Number of analysis window repetitions (SENSe:TRACe:AVERage:COUNt command)  Video bandwidth (SENSe:BWIDth:VIDeo command group)

Statistical analysis can either be triggered by a signal (TRIGger:SOURce INTernal | EXTernal command) or is performed continuously (TRIGger:SOURce IMMediate command). In the first case, analysis is synchronized to the signal characteristic, but not in the second case, i.e. a sequence of analysis windows is used. Analysis is terminated when the specified number of repetitions has been reached. Statistical analysis can be performed only when chopper stabilization is deactivated.

The sample size, i.e. the number of samples analyzed, equals the product of the analysis-window length, the number of repetitions and the sampling rate. In turn, the sampling rate is a function of the video bandwidth that has been set (SENSe:BWIDth:VIDeo command).

Before the analysis result can be output, the user must specify a level range and its resolution in pixels. For each pixel, either the value of the complementary cumulative distribution function or the value of the probability density function (in W-1) is output. The following output parameters can be set:

 Lower limit of level range in dBm (STATistics:SCALe:X:RLEVel command)  Width of level range in dB (STATistics:SCALe:X:RANGe command)  Resolution in pixels (STATistics:SCALe:X:POINts command)

The size of the level interval represented by each pixel is determined by dividing the width of the level range by the number of pixels minus one. The smallest possible interval size for the R&S NRP-Z81/85/86 power sensor is specified as 0.006 dB. It can be queried with the SENSe:STATistics:SCALe:X :MPWidth? command.

SENSe:POWer:AVG:APERture[?] 1.0e-6 … 1.0

SENSe:POWer:AVG:APERture defines the length of the time interval used to measure the average signal power in the Continuous Average mode (sampling window). For an unmodulated signal, the default setting of 10 µs in conjunction with chopper stabilization provides optimum noise suppression. For a specified measurement-result noise-content, the minimum measurement time can therefore be obtained with this setting. Due to the narrow sampling window, averaging factors up to 220 may be required at the lower end of the measurement range (–60 dBm).

Wider sampling windows are required when the measurement result exhibits variations due to modulation. In this case, it is beneficial to set the sampling-window length so that it is exactly equal to the modulation period; this provides a display with optimum stability. If the modulation period varies, or is not exactly known, smoothing (see command group SENSe:POWer:AVG:SMOothing) should also be activated. Approx. five periods within one sampling window are sufficient to reduce variations due to modulation to an acceptable level; variations with more than nine periods are no longer perceptible. With smoothing deactivated, the situation is significantly worse. In this case, 300 periods instead of five are required and variations completely disappear with 3000 or more periods.

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R&S NRP-Z81/-Z85/-Z86 Remote Control - Commands

The query returns the currently set length of the sampling window in seconds.

Default setting: 10.0e-6 [s]

SENSe:POWer:AVG:BUFFer:SIZE[?] 1 to 8192

SENSe:POWer:AVG:BUFFer:SIZE sets the buffer size for the buffered Continuous Average mode. The query returns the current buffer size for the buffered Continuous Average mode.

Default setting: 1

SENSe:POWer:AVG:BUFFer:STATe[?] OFF | ON

The buffered Continuous Average mode is activated with ON and deactivated with OFF. In the buffered mode, measurement results generated by trigger events are buffered in the sensor until the buffer is full. All results are then transferred as block data. The effective measurement rate obtained is thus higher than in the non-buffered Continuous Average mode. The maximum measurement rate is obtained by combining the buffered mode with multiple triggering (see parameter TRIGger:COUNt). The size of the result buffer is set with the SENSe:POWer:AVG:BUFFer:SIZE command.

The query returns

 1 for OFF  2 for ON

Default setting: OFF

SENSe:POWer:AVG:SMOothing:STATe[?] OFF | ON

The ON parameter activates a smoothing filter for modulated signals in the Continuous Average mode and OFF deactivates it. The smoothing filter is a steep-slope digital lowpass filter used to suppress result variations due to modulation. This parameter should be activated to reduce result variations due to modulation when the size of the sampling window cannot, or should not, be set to exactly equal the modulation period. If the selected sampling window is 5 to 9 times larger than a modulation period, the display variations are usually sufficiently reduced. With smoothing deactivated, 300 to 3000 periods are required to obtain the same effect.

When smoothing is deactivated, the sampling values are considered to be equivalent and averaged in a sampling window, which means that the measuring instrument acts as an integrator. As described above, optimum suppression of result variations is obtained when the size of the sampling window exactly equals the modulation period. Otherwise, modulation can have a considerable influence, even if the sampling window is much larger than the modulation period. The response can be considerably improved by weighting samples (raised von Hann window), which is equivalent to video filtering. This is exactly what happens when smoothing is activated.

Since the smoothing filter increases the inherent noise of the sensor by approx. 20%, it should always be deactivated if not required.

The query returns

 1 for OFF  2 for ON

Default setting: OFF

SENSe:POWer:BURSt:DTOLerance[?] 0.0 to 0.3

SENSe:POWer:BURSt:DTOLerance defines the dropout tolerance, a parameter for reliably detecting the end of the burst in the Burst Average mode when signals are modulated (e. g. with digital standards

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Dropout time

Trigger

level

Power

Time

BURSt:DTOLerance

Pulse duration

BURSt:DTOLerance

If the specified value is greater than the length of a timeslot, it is ignored. No error message is output.

NADC, PDC, PHS, etc). The dropout tolerance should be selected to be larger than the greatest amplitude drop and smaller than the gap between two consecutive bursts. The default value is sufficient for all common digital communications standards.

The query returns the dropout tolerance for the Burst Average mode. Default setting: 1.0e-6 [s]

Fig. 6-1 Effect of SENSe:POWer:BURSt:DTOLerance

SENSe:POWer:TSLot[:AVG]:COUNt[?] 1 to 16

For the Timeslot Average mode, SENSe:POWer:TSLot:AVG:COUNt sets the number of consecutive timeslots that are to be processed after each trigger event.

The query returns the number of consecutive timeslots.

Default setting: 1

SENSe:POWer:TSLot[:AVG][:EXCLude]:MID:OFFSet[:TIME][?] 0.0 to 0.1

In the Timeslot Average mode, SENSe:POWer:TSLot[:AVG][:EXCLude]:MID:OFFSet[:TIME] is used to set the start of an exclusion interval in a timeslot. In conjunction with the command SENSe:POWer:TSLot[:AVG][:EXCLude]:MID:TIME, it is possible to exclude, for example, a midamble from the measurement. The start of the timeslot is used as the reference point for defining the start of the exclusion interval and this applies to each of the timeslots. In Fig. 6-2, this parameter is designated as T

OFFSET

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R&S NRP-Z81/-Z85/-Z86 Remote Control - Commands

Even if the exclusion interval exceeds the timeslot because, for example, its right limit is outside the timeslot, correct results are obtained. In the extreme case, where the interval length has been set to a value greater than the timeslot length, 0 W is output as the measured power. No error message is output.

The query command returns the start of the exclusion interval in a timeslot in seconds.

Default setting: 0 [s]

SENSe:POWer:TSLot[:AVG][:EXCLude]:MID:TIME[?] 0.0 to 0.1

In the Timeslot Average mode, SENSe:POWer:TSLot[:AVG][:EXCLude]:MID:TIME is used to specify the length of an exclusion interval in a timeslot. In conjunction with the command SENSe:POWer:TSLot[:AVG][:EXCLude]:MID:OFFSET[:TIME], it can be used, for example, to exclude a midamble from the measurement. The parameter applies to each individual timeslot. In Fig. 6-2, this parameter is designated as T

The query command returns the length of the exclusion interval in seconds in a timeslot.

Default setting: 0 [s]

LENGTH

Fig. 6-2 Effect of an exclusion interval in the Timeslot mode

SENSe:POWer:TSLot[:AVG]:WIDTh[?] 50e-9 to 0.1

SENSe:POWer:TSLot[:AVG]:WIDTh sets the length of a timeslot for the Timeslot Average mode. The query returns the length of a timeslot in seconds. Default setting: 0.0001 [s]

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SENSe:SGAMma:CORRection:STATe[?] OFF | ON

SENSe:SGAMma:CORRection:STATe ON initiates the use of the complex reflection coefficient Γ

source

of the signal source defined with SENSe:SGAMma:MAGNitude and SENSe:SGAMma:PHASe for the correction of interactions between the power sensor and the signal source. This makes it possible to determine the power P delivered by the signal source with considerably greater accuracy.

The complex reflection coefficient Γ prestored in the calibration data memory for a large number of frequencies.

of the sensor, which is also required for the correction, is

sensor

Fig. 6-3 Correction of interactions between the power sensor and the signal source If the gamma correction is made in connection with an s-parameter correction (setting

SENSe:CORRection:SPDevice:STATe ON), the interaction of the signal source with the s-parameter device on the one hand and the input of the power sensor on the other hand (depending on the magnitude of the term | s12 s21 |) is corrected. The interaction between the complex reflection coefficient

of the power sensor and the parameter s22 is always taken into account when the s-parameter

sensor

correction is activated – independent of the gamma correction in connection with the signal source.

Fig. 6-4 Correction of interactions between the power sensor, the signal source, and the s-

parameter device

The query yields

 1 for OFF,  2 for ON.

Default setting: OFF

SENSe:SGAMma:MAGNitude[?] 0.0 to 1.0

SENSe:SGAMma:MAGNitude defines the magnitude of the complex reflection coefficient of the source. A value of 0.0 corresponds to an ideal matched source and a value of 1.0 to total reflection.

The query returns the set magnitude. Default setting: 0.0

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R&S NRP-Z81/-Z85/-Z86 Remote Control - Commands

SENSe:SGAMma:PHASe[?] –360.0 to 360.0

SENSe:SGAMma:MAGNitude defines the phase angle (in degrees) of the complex reflection coefficient of the source.

The query returns the set phase angle.

Default setting: 0.0 [°]

SENSe:STATistics[:EXCLude]:MID:OFFSet[:TIME][?] 0.0 to 0.3

For both Statistics modes, this command is used to specify the start of an exclusion interval in the analysis window. The start time is referenced to the start of the analysis window. All other details are the same as for the Timeslot Average mode (see SENSe:POWer:TSLot[:AVG][:EXCLude]:MID:OFFSet[:TIME][?] command).

Default setting: 0 [s]

SENSe:STATistics[:EXCLude]:MID:TIME[?] 0.0 to 0.3

For both Statistics modes, this command is used to specify the length of an exclusion interval in the analysis window. All other details are the same as for the Timeslot Average mode (see SENSe:POWer:TSLot[:AVG][:EXCLude]:MID:TIME][?] command).

Default setting: 0 [s]

SENSe:STATistics:OFFSet:TIME[?] 0.0 to 10.0

In both Statistics modes, SENSe:STATistics:OFFSet:TIME is used to specify the start of the analysis window for recording measured values. The start time is referenced to the delayed trigger point (TRIGger:DELay command). Only positive values are valid. If the analysis window starts before the physical trigger point, the trigger delay must be set to a negative value with a suitably large magnitude (minimum magnitude –51.2 µs).

The query command returns the set time in seconds.

Default setting: 0.0 [s]

SENSe:STATistics:SCALe:X:MPWidth?

In both Statistics modes, this command is used to query the greatest attainable level resolution. For the R&S NRP-Z81/85/86 power sensor, this value is fixed at 0.006 dB per pixel. If this value is exceeded, a "Settings conflict" message is output. The reason for the conflict may be that the number of pixels that has been selected is too great or that the width chosen for the level range is too small (SENSe:STATistics:SCALe:X:POINts und SENSe:STATistics:SCALe:X:RANGe commands).

SENSe:STATistics:SCALe:X:POINts[?] 3 to 8191

SENSe:STATistics:SCALe:X:POINts is used to set the measurement-result resolution in both Statistics modes. This command specifies the number of pixels that are to be assigned to the logarithmic level range (SENSe:STATistics:SCALe:X:RANGe command) for measured value output. The width of the level range divided by N–1, where N is the number of pixels, must not be less than the value which can be read out with SENSe:STATistics:SCALe:X:MPWidth?.

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Remote Control - Commands R&S NRP-Z81/-Z85/-Z86

If the exclusion times defined with EXCLude:STARt and EXCLude:STOP overlap, a "Settings conflict" message is output.

The query command returns the number of pixels for both Statistics modes.

Default setting: 200

SENSe:STATistics:SCALe:X:RANGe[?] 0.01 to 100

SENSe:STATistics:SCALe:X:RANGe is used to specify the width of the level range for the analysis result in both Statistics modes.

The query returns the set level range in dB.

Default setting: 50 [dB]

SENSe:STATistics:SCALe:X:RLEVel[?] –80 to +20

SENSe:STATistics:SCALe:X:RLEVel is used to define the lower limit of the level range for the analysis result in both Statistics modes. This level can be assigned to the first pixel. The level assigned to the last pixel is equal to the level of the first pixel plus the level range.

The query returns the lower limit of the level range for the Statistics modes.

Default setting: –30 [dBm]

SENSe:STATistics:TIME[?] 10.0e-6 to 0.3

SENSe:STATistics:TIME is used to set the duration of the analysis window for both Statistics modes. The query command returns the time-window duration in seconds.

Default setting: 0.01 [s]

SENSe:TIMing:EXCLude:STARt[?] 0.0 to 10

SENSe:TIMing:EXClude:STARt defines an exclusion time at the beginning of the measurement window in the Burst Average and Timeslot Average modes. It is referred to as “T

The query returns the exclusion time at the beginning of the measurement window. Default setting: 0.0 [s]

“ in Fig. 6-5 and Fig. 6-6.

START

SENSe:TIMing:EXCLude:STOP[?] 0.0 to 51.2e-6

SENSe:TIMing:EXClude:STOP defines an exclusion time at the end of the measurement window in the Burst Average (Fig. 6-5) and Timeslot Average (Fig. 6-6) modes. It is referred to as “T

and Fig. 6-6. The query returns the exclusion time at the end of the measurement window. Default setting: 0.0 [s]

“ in Fig. 6-5

STOP

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R&S NRP-Z81/-Z85/-Z86 Remote Control - Commands

Fig. 6-5 Effect of SENSe:TIMing:EXCLude:STARt and :STOP in the Burst Average mode

Fig. 6-6 Effect of SENSe:TIMing:EXCLude:STARt and :STOP in the Timeslot mode

SENSe:TRACe:AVERage:COUNt[?] 1 to 65536

SENSe:TRACe:AVERage:COUNt is used to set the averaging factor, i.e. the number of traces to be evaluated in the Trace mode and the number of timegates to be analyzed in the Statistics modes. In the Trace mode, the type of evaluation depends on the measurement result required for a pixel (SENSe:AUXiliary command):

Average power: The power values of identical measurement points, i.e. points at the same distance

from the trigger point, are averaged. This reduces noise, the noise reduction being proportional to the square root of the averaging factor.

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Averaging factors greater than one must be activated with the SENSe:TRACe:AVERage:STATe ON command.

Max./min. values: The maximum and minimum of all samples taken at identical measurement points,

i.e. points at the same distance from the trigger point, are found and output.

Random values: The random values are obtained from the first measurement cycle. Repetition of

the measurement cycle has no effect on the result.

In the Statistics modes, the averaging factor is used to define sample size. For example, a sample size of 106 is required and the analysis window has a length of 100 µs. If the sampling rate is 80 Msamples/s, at least 125 analysis windows will be required. As the averaging factor can only be set in powers of two on the sensors, 128 should be chosen.

The general rule is: The higher the averaging factor, the less the fluctuations in the measured values (with the exception of the random samples in the Trace mode) and the longer the total measurement time.

The averaging factor set by this command is rounded to the nearest power-of-two by the sensor. The query returns the averaging factor set by the sensor

Default setting: 1

SENSe:TRACe:AVERage:STATe[?] OFF | ON

SENSe:TRACe:AVERage:STATe ON enables evaluation of several traces in the Trace mode or of several windows in the Statistics modes. The number of traces / windows (averaging factor) is defined by the SENSe:TRACe:AVERage:COUNt command.

The query returns

 1 for OFF  2 for ON

Default setting: ON

SENSe:TRACe:AVERage:TCONtrol[?] MOVing | REPeat

SENSe:TRACe:AVERage:TCONtrol (terminal control) defines how the measurement results are to be output in the Trace or Statistics modes if an averaging factor greater than one has been activated.

The REPeat parameter specifies that a measurement result is output only after the whole measurement has been completed. This means that the number of measurement cycle repetitions is equal to the set averaging factor. If the averaging factor is large, the measurement time can be very long.

When settings are made with the MOVing parameter, intermediate values are output to facilitate early detection of changes in the measured quantity. In the settled state - i.e. the number of measurements specified by the averaging factor has been carried out - a moving average is output in the Trace mode. In the Statistics modes, every measurement output is based on a sample size that has been previously defined. The SYStem:RUTime command can be used to vary the output rate over a wide range so that some intermediate results can be ignored.

The query returns

 1 for MOVing  2 for REPeat

Default setting: REPeat

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R&S NRP-Z81/-Z85/-Z86 Remote Control - Commands

SENSe:TRACe:ESAMpling:AUTO[?] OFF | ON

The command SENSe:TRACe:ESAMpling:AUTO ON enables the automatic equivalent sampling. With this setting, the sensor will – depending on certain parameters – superpose several successive measurements to facilitate a high-resolution trace representation. However, this requires a periodic measurement signal and has a negative effect on measurement speed. Thus, the automatic equivalent sampling can be disabled with the command SENSe:TRACe:ESAMpling:AUTO OFF.

The query returns

 1 for OFF,  2 for ON.

Default setting: ON

SENSe:TRACe:MEASurement:ALGorithm [?] HISTogram | INTegration | PEAK

This command is used to select the analysis algorithm for determining the pulse top and pulse base power.

The default setting HISTogram determines the pulse top and pulse base power by means of the probability density of instantaneous values of the recorded trace. However, if the quality of the signal is such that pulse top and pulse base cannot be identified, then the maximum and minimum values of the trace are used as pulse top and pulse base power. For most waveforms the HISTogram algorithm provides useful values and is preferable to the INTegration algorithm.

With the INTegration algorithm, the measured trace is first approximated by an ideal pulse representation with the same energy content, pulse duration and period. Pulse top power and pulse base power are then determined using this ideal pulse representation. This algorithm is recommended for radar pulses as well as pulses or bursts with time-variant envelope, e.g. EDGE bursts.

With the PEAK setting, the absolute maximum and the absolute minimum are used as pulse peak power and pulse base power, respectively. This algorithm is suitable for DME pulses.

The query returns

 1 for HISTogram,  2 for INTegration,  3 for PEAK.

Default setting: HISTogram

SENSe:TRACe:MEASurement:AUTO[?] OFF | ON

SENSe:TRACe:MEASurement:AUTO ON is used to automatically transfer the measured pulse parameters after each trace. This enables a synchronous display of the trace and the pulse data during a continuous measurement with INITiate:CONTinuous ON.

The query returns

 1 for OFF,  2 for ON.

Default setting: OFF

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SENSe:TRACe:MEASurement:DEFine:DURation:REFerence[?] 0.0 … 100.0

This command defines the level used to measure the pulse duration and period. This level is set in percent of the pulse amplitude which is defined as the difference of pulse top power and pulse base power.

The query returns the set level in percent of the pulse amplitude.

Default setting: 50 [%]

SENSe:TRACe:MEASurement:DEFine:TRANsition:HREFerence[?] 0.0 … 100.0

This command defines the upper reference level that is used to measure the rise and fall times. This level is set in percent of the pulse amplitude which is defined as the difference of pulse top power and pulse base power.

The query returns the set level in percent of the pulse amplitude. Default setting: 90 [%]

SENSe:TRACe:MEASurement:DEFine:TRANsition:LREFerence[?] 0.0 … 100.0

This command defines the lower reference level that is used to measure the rise and fall times. This level is set in percent of the pulse amplitude which is defined as the difference of pulse top power and pulse base power.

The query returns the set level in percent of the pulse amplitude.

Default setting: 10 [%]

SENSe:TRACe:MEASurement:OFFSet:TIME[?] –x to 10.0

This command defines the start time of the pulse analysis referenced to the delayed trigger point (settable with the TRIGger:DELay command). As standard, the parameters of the first pulse detected within a trace are determined. This command is used to allow the parameters of a pulse other than the first in a trace to be determined. In this case, the pulse analysis must not begin until shortly before this pulse.

The query returns the start time of the pulse analysis referenced to the start of the trace measurement.

Default setting: 0.0 [s]

SENSe:TRACe:MEASurement:POWer:AVG?

This query returns the average power of the measurement signal in watts (Fig. 6-7) if the sensor is operated in Trace mode. For this, it is necessary that the analysis interval contains at least one full period of the measurement signal. If this is not the case, NaN (Not a Number) is returned.

SENSe:TRACe:MEASurement:POWer:HREFerence?

This query converts the upper reference level set with SENSe:TRACe:MEASurement:DEFine :TRANsition:HREFerence to an absolute power value in watts (Fig. 6-8).

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SENSe:TRACe:MEASurement:POWer:LREFerence?

This query converts the lower reference level set with SENSe:TRACe:MEASurement:DEFine :TRANsition:LREFerence to an absolute power value in watts (Fig. 6-8).

SENSe:TRACe:MEASurement:POWer:MAX?

This query returns the maximum power value of a trace in watts (Fig. 6-7).

Fig. 6-7 Magnitude parameters of a trace

Fig. 6-8 Time parameters and reference levels of a trace

SENSe:TRACe:MEASurement:POWer:MIN?

This query returns the minimum power value of a trace in watts (Fig. 6-7).

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SENSe:TRACe:MEASurement:POWer:PULSe:BASE?

This query returns the pulse base power in watts (Fig. 6-7).

SENSe:TRACe:MEASurement:POWer:PULSe:TOP?

This query returns the pulse top power in watts (Fig. 6-7).

SENSe:TRACe:MEASurement:POWer:REFerence?

This query converts the reference level set with SENSe:TRACe:MEASurement:DEFine :DURation:REFerence to an absolute power value in watts (Fig. 6-8).

SENSe:TRACe:MEASurement:PULSe:DCYCle?

This query returns the duty cycle of the measured pulse signal in percent. If the pulse period – and thus the duty cycle – cannot be determined, NaN (Not a Number) is returned. The following equation applies:

Duty cycle = (pulse duration / pulse period) * 100 [%]

SENSe:TRACe:MEASurement:PULSe:DURation?

This query returns the pulse duration which is defined as the time difference between the first positive edge in the analysis interval and the subsequent negative edge of the pulse (Fig. 6-8). If the pulse duration cannot be determined, NaN (Not a Number) is returned.

SENSe:TRACe:MEASurement:PULSe:PERiod?

This query returns the pulse period which is defined as the time between two consecutive edges of the same polarity (Fig. 6-8). If the pulse period cannot be determined, NaN (Not a Number) is returned.

The algorithm can automatically detect double pulses and also in this case correctly determine the period, provided that the trace covers at least three complete periods.

SENSe:TRACe:MEASurement:PULSe:SEParation?

This query returns the time between two pulses in seconds (Fig. 6-8). This corresponds to the time between the first negative and the subsequent positive edge. The following correlation applies:

Separation = pulse period – pulse duration If the pulse duration cannot be determined, NaN (Not a Number) is returned.

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R&S NRP-Z81/-Z85/-Z86 Remote Control - Commands

SENSe:TRACe:MEASurement:STATe[?] OFF | ON

SENSe:TRACe:MEASurement:STATe switches the automatic pulse measurement in the Trace mode on or off. If pulse measurement is on, the sensor automatically determines the pulse parameters for the currently measured trace.

The query returns

 1 for OFF,  2 for ON.

Default setting: OFF

SENSe:TRACe:MEASurement:TIME[?] 0.0 … 10.0

This command defines the duration of the pulse analysis. A value of 0.0 means that the analysis interval starts at the time determined by SENSe:TRACe:MEASurement:DEFine:OFFSet:TIME after the start of the trace measurement and extends to the end of the trace measurement, i.e. it is not subject to additional restrictions. A value greater than 0.0 is used to limit the analysis interval to a time before the end of the trace measurement.

The query returns the duration of the pulse analysis or 0.0 if this function is disabled.

Default setting: 0.0 [s] (no additional restrictions on analysis interval)

SENSe:TRACe:MEASurement:TRANsition:ESAMpling:AUTO[?] OFF | ON

The command SENSe:TRACe:MEASurement:TRANsition:ESAMpling:AUTO ON enables the automatic equivalent sampling for pulse measurement. With this setting, the sensor will – depending on certain

parameters – superpose several successive measurements to facilitate a high-resolution pulse measurement. However, this requires a periodic measurement signal and has a negative effect on measurement speed. Thus, the automatic equivalent sampling for pulse measurement can be disabled with the command SENSe:TRACe:MEASurement:TRANsition:ESAMpling:AUTO OFF.

The query returns

 1 for OFF,  2 for ON.

Default setting: ON

SENSe:TRACe:MEASurement:TRANsition:NEGative:DURation?

This query returns the fall time of the first falling edge in the analysis interval. The fall time is defined as the time from when the signal falls below the upper reference level (see SENSe:TRACe:MEASurement:DEFine:TRANsition:HREFerence) to when it falls below the lower reference level (see SENSe:TRACe:MEASurement:DEFine:TRANsition:LREFerence). If no falling edge can be detected, NaN (Not a Number) is returned.

SENSe:TRACe:MEASurement:TRANsition:NEGative:OCCurrence?

This query returns the point in time when the first falling edge in the analysis interval occurs (pulse stop time), i.e. the point in time at which the signal falls below the middle reference level (see SENSe:TRACe:MEASurement:DEFine:DURation:REFerence). The delayed trigger event serves as temporal reference. If no falling edge can be detected, NaN (Not a Number) is returned.

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Remote Control - Commands R&S NRP-Z81/-Z85/-Z86

SENSe:TRACe:MEASurement:TRANsition:NEGative:OVERshoot?

This query returns the overshoot, i.e. the height of the local minimum, after a falling edge, in percent of the pulse amplitude which is defined as the difference of pulse top power and pulse base power. The search interval begins when the signal falls below the lower reference level (see SENSe:TRACe:MEASurement:DEFine:TRANsition:LREFerence) and ends half a period after that. The following correlation applies:

neg. Overshoot = (pulse base level – local minimum) / pulse amplitude * 100 [%]

SENSe:TRACe:MEASurement:TRANsition:POSitive:DURation?

This query returns the rise time of the first rising edge in the analysis interval. The rise time is defined as the time from when the signal exceeds the lower reference level (see SENSe:TRACe

:MEASurement:DEFine:TRANsition:LREFerence) to when it exceeds the upper reference level (see SENSe:TRACe :MEASurement:DEFine:TRANsition:HREFerence). If no rising edge can be detected, NaN (Not a Number) is returned.

SENSe:TRACe:MEASurement:TRANsition:POSitive:OCCurrence?

This query returns the point in time when the first rising edge occurs (pulse start time), i.e. the point in time at which the signal exceeds the middle reference level (see SENSe:TRACe:MEASurement:DEFine :DURation:REFerence). The delayed trigger event serves as temporal reference. If no rising edge can be detected, NaN (Not a Number) is returned.

SENSe:TRACe:MEASurement:TRANsition:POSitive:OVERshoot?

This query returns the overshoot, i.e. the height of the local maximum, after a rising edge, in percent of the pulse amplitude which is defined as the difference of pulse top power and pulse base power. The search interval begins when the signal exceeds the upper reference level (see SENSe:TRACe:MEASurement:DEFine:TRANsition:HREFerence) and ends half a period after that. The following equation applies:

pos. Overshoot = (local maximum – pulse top level) / pulse amplitude * 100 [%]

SENSe:TRACe:MEASurement:TRANsition:SPERiod?

This query returns the resolution of the temporal pulse parameters in seconds. The actual value is dependent on the settings and the measurement signal.

SENSe:TRACe:MPWidth?

This query returns the sampling interval for the Trace mode and the Statistics modes. It is equal to the reciprocal of the sampling rate and determines the effective time resolution when the measurement signal is sampled. The sampling rate and the sampling interval change when the video-bandwidth setting is changed (SENSe:BWIDth:VIDeo command).

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R&S NRP-Z81/-Z85/-Z86 Remote Control - Commands

 



 





points of Number

slength Trace

4096sdelayTriggersx

SENSe:TRACe:OFFSet:TIME[?] –x to 10.0

SENSe:TRACe:OFFSet:TIME is used to specify the start of recording for the Trace mode. It is identical with the first pixel. The time associated with the last pixel is the time associated with the first pixel plus the trace length. The start of recording is referenced to the delayed trigger point (settable with the TRIGger:DELay command). Negative values indicate that the start of recording occurs before the delayed trigger point.

Due to the hardware limitations of the R&S NRP-Z81/85/86 power sensor, the recording cannot start at any point in time before the physical trigger event, i.e. the sum of the parameters TRIGger:DELay and SENSe:TRACe:OFFSet:TIME must be limited at the negative end. This limit corresponds to a length of 4096 pixels – in other words, it depends on the trace length and the number of points. Therefore, x may not exceed the following limit:

Example: The trace length is 10 µs for 200 points, the trigger delay being set to -5 µs. This means that the start of recording can be set to occur max. 199.8 µs before the delayed trigger point. The formula above is exact only when the trace length and the number of points used to measure the signal can be queried with the SENSe:TRACe:TIME:FPGA? and SENSe:TRACe:POINTs:FPGA? commands. They always differ to some extent from the values obtained from the commands SENSe:TRACe:TIME and SENSe:TRACe:POINTs.

The query command returns the start of recording in seconds, referenced to the delayed trigger event.

Default setting: 0.0 [s]

SENSe:TRACe:POINts[?] 3 to 8192

This command defines the time resolution for the measurement result in the Trace mode. Each point represents a time interval whose length is equal to the trace length (command SENSe:TRACe:TIME) divided by N-1, where N is the number of points. If this time interval is not an integer multiple of the sampling interval used internally by the sensor (SENSe:TRACe:MPWidth? query command), or is less than the internal sampling interval, all output values are obtained by linear interpolation, i.e. they are not based on an actual measurement. This processing step is performed automatically so that measurement result output can be defined without taking internal signal processing into account. All the same, this step is time-consuming and time resolution is not increased as a result.

Measurement times can always be minimized if the trace length and the number of points for the measurement result are chosen to match the internal values. The trace length and the number of points for the measurement result must first be set with the commands SENSe:TRACe:TIME and

SENSe:TRACe:POINTs. The query commands SENSe:TRACe:TIMe:FPGA? and SENSe:TRACe:POINts:FPGA? are then used to obtain the values used internally so that the input

values can be corrected accordingly. The measurement result for a point comprises the average power plus max and min power or a random

power sample, if selected with the command SENSe:AUXiliary. The query returns the number of set points.

Default setting: 200

SENSe:TRACe:POINts:FPGA?

SENSe:TRACe:POINts:FPGA? can be used to query the number of points for the Trace mode used internally by the signal processing FPGA.

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Remote Control - Commands R&S NRP-Z81/-Z85/-Z86

SENSe:TRACe:TIME[?] 50e-9 to 1

SENSe:TRACe:TIME sets the (trace length in the Trace mode. The query returns the set time (in seconds).

Default setting: 0.01 [s]

SENSe:TRACe:TIME:FPGA?

SENSe:TRACe:TIME:FPGA? can be used to query the trace length for the Trace mode used internally by the signal processing FPGA.

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R&S NRP-Z81/-Z85/-Z86 Remote Control - Commands

Command

Parameter

Unit

Remarks

SYSTem

:FEATures?

Query only

:INFO? [Item]

Query only

:INITialize

No query

:LIMits?

Query only

:MINPower?

W Query only

:RUTime

0.0 to 10.0

s :SUTime

0.0 to 10.0

s :TRANsaction

:BEGin

No query

:END

No query

Item

Information string

Remarks

"MANUFACTURER"

"Rohde & Schwarz"

Manufacturer

"TYPE"

"NRP-Z81" for R&S NRP-Z81 "NRP-Z85" for R&S NRP-Z85 "NRP-Z86" for R&S NRP-Z86

Type designation

SYSTem

SYSTem commands can be used to define and query administrative device settings. This includes detailed information about the sensor and its initialization and the transfer of available commands and their parameter limits.

Table 6-5 SYSTem command group

SYSTem:FEATures?

This query prompts the sensor to output a complete list of all supported commands and parameters. This makes it possible to automatically adapt the remote-control software to the features of different types of sensor with different functionalities.

SYSTem:INFO? [Item]

SYSTem:INFO? returns a string containing information that is more detailed than the identification string output by the sensor in response to *IDN?. If no Item is specified, the response string is a sequence with the format Item:Information string separated by CR and LF (in C notation: \r\n). The information associated with a particular item can be obtained by appending the appropriate Item option. The response string is zero-terminated, i.e. its end identifier is a zero byte (in C notation: \0).

Table 6-6 Meaning of Item in the SYSTem:INFO? command

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Remote Control - Commands R&S NRP-Z81/-Z85/-Z86

Item

Information string

Remarks

"STOCK NUMBER"

"1137.9009.02" for R&S NRP-Z81 "1411.7501.02" for R&S NRP-Z85 "1417.0109.40" for R&S NRP-Z86 Var. 40 "1417.0109.44" for R&S NRP-Z86 Var. 44

Material number

"SERIAL"

"<serial number>"

6-digit serial number

"HWVERSION"

"000000000"

Hardware version (standard)

"HWVARIANT"

"000000000"

Hardware model (standard)

"SW BUILD"

"<build number>"

Version number of sensor firmware

"FPGA BUILD"

"<build number>"

Version number of FPGA firmware

"TECHNOLOGY"

"Diode"

Detector technology used

"FUNCTION"

"Power Terminating"

The R&S NRP-Z81/85/86 is a terminating power sensor.

"MINPOWER"

"<nominal lower test limit in W>"

The nominal lower test limit of the R&S NRP-Z81/85/86 is 1 nW, i.e. with S-parameter correction deactivated, the sensor returns the information string "1e-09" in response to SYSTem:INFo? "MINPOWER". With S-parameter correction activated, the information string depends on the nominal lower limit of the sensor/twoport combination.

"MAXPOWER"

"<nominal upper test limit in W>"

The nominal upper test limit of the R&S NRP-Z81/85/86 is 100 mW, i.e. with S-parameter correction deactivated, the sensor returns the information string "0.1" in response to SYSTem:INFo? "MAXPOWER". With S-parameter correction activated, the information string depends on the nominal upper limit of the sensor/twoport combination.

"MINFREQ"

"5e+07"

The minimum measurement frequency of the R&S NRPZ81/85/86 is 50 MHz.

"MAXFREQ"

"1.8e+10" for R&S NRP-Z81 "4.0e+11" for R&S NRP-Z85 "4.0e+11" for R&S NRP-Z86 Var. 40 "4.4e+11" for R&S NRP-Z86 Var. 44

The maximum measurement frequency is 18 GHz for the R&S NRP-Z81 and 40 GHz for the R&S NRP-Z85/NRP-Z86 Var. 40. "RESOLUTION"

“12.5ns”

The maximum time resolution in the Trace mode is 12.5 ns.

"IMPEDANCE"

"50"

The R&S NRP-Z81/85/86 RF input has a nominal input impedance of 50 .

"COUPLING"

"AC"

The RF input of the R&S NRP-Z81/85/86 is AC-coupled.

"CAL. ABS."

"<date>"

Date of absolute calibration in the format YYYY-MM-DD. "Invalid Calibration Date" is returned if an invalid date is entered.

"CAL. REFL."

"<date>"

Date of reflection-coefficient calibration in the format YYYY-MMDD. "Invalid Calibration Date" is returned if an invalid date is entered.

"CAL. S-PARA."

"<date>"

Date of S-parameter calibration in the format YYYY-MM-DD. If no S-parameter set is loaded, the sensor returns the string "not applicable". "Invalid Calibration Date" is returned if an invalid date is entered.

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R&S NRP-Z81/-Z85/-Z86 Remote Control - Commands

Item

Information string

Remarks

"CAL. MISC."

"<date>"

Date of calibration of other parameters in the format YYYY-MMDD. "Invalid Calibration Date" is returned if an invalid date is entered.

"CAL. TEMP."

"<date>"

Date of detector characterization in the format YYYY-MM-DD. "Invalid Calibration Date" is returned if an invalid date is entered.

"CAL. LIN."

"<date>"

Date of linearity calibration in the format YYYY-MM-DD. "Invalid Calibration Date" is returned if an invalid date is entered.

"SPD MNEMONIC"

"<mnemonic string>"

Clear-text designation of the components connected ahead of the sensor.

"TESTLIMIT"

"0.160 dB"

Test limit for the automated test conducted by the NRP power meter base unit if s-parameter correction has been deactivated.

"TESTLIMIT PD."

"<testlimit>"

Test limit for the automated test conducted by the NRP power meter base unit if s-parameter correction has been activated (actual value dependent on s-parameters of the component connected ahead of the sensor).

"UPTIME"

"<uptime in s>"

Uptime of the power sensor since the last power-up/firmware update in seconds.

SYSTem:INITialize

SYSTem:INITialize sets the sensor to the standard state, i.e. the loading of default settings for all test parameters is the same as that for *RST. The sensor then outputs a complete list of all supported commands and parameters. The command can be used to automatically adapt the remote-control software to the features of different types of sensor with different functionalities.

SYSTem:LIMits?

This query prompts the sensor to output a complete list of all supported parameter value ranges. This makes it possible to automatically adapt the remote-control software to the features of different types of sensor with different functionalities.

SYSTem:MINPower?

SYSTem:MINPower? returns the lower test limit of the sensor, or of the sensor and the components connected ahead of it, if the SENSe:CORRection:SPDevice parameter has the value ON. This query can be used to determine an effective resolution for the result display near the lower test limit.

SYSTem:RUTime 0 to 10.0

This command is used to limit the output rate when measurements are performed with continuous result output (setting INITiate:CONTinuous ON). This is useful if the measurement time is very short or if measurements are made with intermediate result output (SENSe:AVERage:TCONtrol MOVing or SENSe:TRACe:AVERage:TCONtrol MOVing command). If this limit is not set, the controlling host becomes overloaded very quickly or overly occupied with handling the output of measured values.

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Remote Control - Commands R&S NRP-Z81/-Z85/-Z86

The parameter in the SYSTem:RUTime command is chosen to equal the required minimum interval between two consecutive measured value outputs. This equals the reciprocal of the output rate. If a measurement is known to take a long time, the output rate is cut accordingly.

SYSTem:SUTime 0 to 10.0

This command is used to reduce the frequency of the messages that are output when the sensor changes state from WAIT_FOR_TRIGGER to MEASURING.

Usually, the control unit is informed about this change of state. However, if measurement times are very short and/or trigger events occur very frequently, the data flows on the remote control connection can be very heavy and the control unit (or host) may not be able to handle them. The parameter SUTime can be used to define how long the power sensor shall remain in the WAIT_FOR_TRIGGER state without the associated status message being output.

Usually, SUTime is set to a value that is slightly less than the response time of the control system. This means that trigger events that have not occurred can still be detected in good time. At high trigger frequencies, this means that only the first transition to the WAIT_FOR_TRIGGER state and the subsequent transition into the MEASURING state are indicated by messages after the measurement is started. The next message will only indicate the return to the IDLE state on completion of the measurement.

SYSTem:TRANsaction:BEGin

SYSTEM:TRANsaction:BEGin marks the beginning of a sequence of setting commands whose parameter limits do not have to be checked. This prevents error messages from being displayed when a setting command causes a conflict that is resolved by a subsequent setting command. See SYSTEM:TRANsaction:END.

SYSTem:TRANsaction:END

SYSTEM:TRANsaction:END marks the end of a sequence of setting commands whose parameter limits do not have to be checked. This command reactivates parameter limit checks.

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R&S NRP-Z81/-Z85/-Z86 Remote Control - Commands

Command

Parameter

Unit

Remarks

TEST:SENSor?

Query only

No signal may be applied to the sensor while the selftest is running. If the selftest is carried out with a signal connected, error messages may erroneously be

output for the test steps "Offset Voltages" and/or "Noise Voltage".

TEST

Table 6-7 TEST command group

TEST:SENSor?

TEST:SENSor? triggers a sensor selftest. Unlike *TST, this command returns detailed information which is useful for troubleshooting.

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Remote Control - Commands R&S NRP-Z81/-Z85/-Z86

Command

Parameter

Unit

Remarks

ABORt

No query

INITiate

:CONTinuous[?]

OFF | ON

:IMMediate

No query

TRIGger

:ALEVel:STATe[?]

OFF | ON

:ATRigger:STATe[?]

OFF | ON

:COUNt[?]

1 to 2109

:DELay[?]

–51.2e-6 to 10.0

:DTIMe[?]

0.0 to 10.0

s :HOLDoff[?]

0.0 to 10.0

s :HYSTeresis[?]

0.0 to 10.0

:IMMediate

No query

:LEVel[?]

1.0e-6 to 0.1

W :MASTer:STATe[?]

OFF | ON

:SLOPe[?]

POSitive | NEGative

:SOURce[?]

HOLD | IMMediate | INTernal | BUS | EXTernal

:SYNChronisation:STATe[?]

OFF | ON

TRIGger

Table 6-8 TRIGger command group

ABORt

ABORt interrupts the current measurement and sets the sensor to the IDLE state (normal case). However, if the sensor is in the continuous measurement mode (setting INITiate:CONTinuous ON), the IDLE state is immediately exited and the sensor enters the WAIT_FOR_TRIGGER state.

INITiate:CONTinuous[?] OFF | ON

INITiate:CONTinuous ON activates the continuous measurement mode. In this mode, a new measurement cycle is automatically started after the preceding one has been terminated. The sensor first enters the WAIT_FOR_TRIGGER state and begins the measurement as soon as the trigger condition is fulfilled. Depending on the number of trigger events that are required, e.g. for averaging, the WAIT_FOR_TRIGGER state can be entered several times. Once the whole measurement cycle is

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R&S NRP-Z81/-Z85/-Z86 Remote Control - Commands

completed, a measurement result is available and the sensor enters the WAIT_FOR_TRIGGER state again. The sensor will continue measuring if there are continuous trigger events.

If the continuous measurement mode is switched off by means of the INITiate:CONTinuous OFF command, single measurements can be started with the INITiate:IMMediate command (see below).

The query returns

 1 for OFF  2 for ON

Default setting: OFF

INITiate:IMMediate

INITiate:IMMediate starts a single measurement cycle. The sensor first changes from the IDLE state to the WAIT_FOR_TRIGGER state and begins the measurement as soon as the trigger condition is fulfilled. Depending on the number of trigger events that are required, e.g. for averaging, the WAIT_FOR_TRIGGER state can be entered several times. Once the whole measurement is completed, a measurement result is available and the sensor enters the IDLE state again. The INITiate :IMMediate command should only be used after the continuous measurement mode has been switched off with the INITiate:CONTinuous OFF command.

TRIGger:ALEVel:STATe[?] OFF | ON

In the Trace mode, TRIGger:ALEVel:STATe ON activates the automatic setting of the trigger threshold for internal triggering (TRIGger:SOURce INTernal). This involves determining the smallest and the largest sample value within the trace length and setting the trigger threshold so that it lies exactly at the midpoint between these two values. If there are no trigger events for more than 0.3 seconds, an automatic search phase lasting 1 second is activated and then the trigger threshold is adjusted.

TRIGger:ALEVel:STATe OFF is used to disable the automatic setting of the trigger threshold for internal triggering. The last automatically determined setting is retained in this case.

The query command returns

 1 for OFF  2 for ON

Default setting: OFF

TRIGger:ATRigger:STATe[?] OFF | ON

TRIGger:ATRigger:STATe ON generates an artificial trigger if more than 300 ms have elapsed after the start of measurement and no trigger event has been recorded. The command is only evaluated in the

Trace mode and, irrespective of the set averaging factor, only one trace will be recorded. TRIGger:ATRigger:STATe OFF deactivates the automatic trigger function.

The query returns

 1 for OFF  2 for ON

Default setting: OFF

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Remote Control - Commands R&S NRP-Z81/-Z85/-Z86

The TRIGger:COUNt command does not define the number of trigger events required to perform the entire measurement task. This number is either identical or an integer multiple if averaging has been activated.

A further increase in the measurement speed can be obtained by entering the buffered mode as well (see command group SENSe:POWer:AVG:BUFFer). In this mode, the results are not made available immediately, but as a block at the end of the measurement cycle.

TRIGger:COUNt[?] 1 to 2

This setting is designed for applications where several consecutive measurements are performed by sending the INITiate:IMMediate command only once, e.g. to obtain higher measurement speed. The gap between a single measurement and the continuous measurement mode is thus closed. The number of measurements is defined by the parameter associated with the TRIGger:COUNt command. This number equals the number of results obtained by the sensor at the end of the measurement. One result may contain several numerical values, e.g. power values for the trace points.

The query returns the number of measurements to be performed after a measurement is started with the INIT:IMMediate command.

Default setting: 1

TRIGger:DELay[?] –x to 10.0

This command is used to set a trigger delay for all measurements in sync with the signal except in the Burst Average mode. It provides a time offset to the physical trigger event equal to the entered value. The trigger can thus be shifted to a point in time of the measurement signal that is significant for the measurement, for example to the start of the first timeslot for the Timeslot Average mode. If external triggering is used, delay differences between the external trigger signal and the measurement signal can be compensated for with a trigger delay. It is possible to set negative trigger delays, i.e. the trigger point can occur before the physical trigger event. No matter which measurement mode is selected, the negative limit is –51.2 µs. If the trigger delay is entered in the Trace mode, an additional condition must be met: the sum of the start of recording and the trigger delay must not exceed the length of –4096 pixels (see notes on the SENSe.TRACe:OFFSet:TIME command). If full use is to be made of this value, it depends on the order in which the trigger delay and the start of recording are entered whether a trigger delay down to –51.2 µs can be set. When a different measurement mode is selected, the full –51.2 µs become immediately available again. When switching (back) to the Trace mode, the trigger delay that has been set is retained and, if there is a conflict, the start of recording is adjusted automatically. In the Timeslot Average modes, the time resolution of the trigger delay is always 12.5 ns; in the

Statistics modes, it depends on the video bandwidth (see the SENSe:BWIDth:VIDeo command). In the Trace mode, it equals the length of a pixel as used for internal signal processing (see the SENSe:TRACe:TIME:FPGA? and SENSe:TRACe:POINts:FPGA? query commands).

Any trigger delay that is set comes into effect irrespective of the defined trigger source, but this is only useful with the Internal and External settings.

Default setting: 0.0 [s]

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R&S NRP-Z81/-Z85/-Z86 Remote Control - Commands

TRIGger:DTIME[?] 0.0 to 10.0

TRIGger:DTIMe is used to set the dropout time in seconds. With a positive (negative) trigger slope, the dropout time is the minimum time for which the signal must be below (above) the power level defined by TRIGger:LEVel and TRIGger:HYSTeresis before triggering can occur again. As with the Holdoff parameter, unwanted trigger events can be excluded. The set dropout time only affects the INTernal trigger source.

The dropout time parameter is useful when dealing with, for example, GSM signals with several active slots (Fig. 6-9). When performing a measurement in sync with the signal, a trigger event is to be produced at A, but not at B or C. As the RF power between the slots is below the threshold defined by TRIGger:LEVel and TRIGger:HYSTeresis, the trigger hysteresis alone cannot prevent triggering at B or at C. This is why the dropout time parameter is selected to be greater than the time elapsed between points D and B and between E and C, but less than the time elapsed between F and A. This ensures that triggering will take place at A.

Fig. 6-9 Effect of the dropout time parameter

As the mechanism associated with the dropout time parameter is reactivated whenever the trigger threshold is crossed, unambiguous triggering can also be obtained for many complex signals. By contrast, all triggering is suppressed during the hold-off time. For the example described, this would mean that although stable triggering conditions could be obtained with a suitable hold-off time (regular triggering at the same point), it would not be possible to set exclusive triggering at A.

The query command returns the dropout time in seconds.

Default setting: 200.0e-9 [s]

TRIGger:HOLDoff[?] 0.0 to 10.0

TRIGger:HOLDoff suppresses trigger events within the set hold-off time (in seconds), starting from the time of the last successful triggering.

The query returns the set hold-off time (in seconds). Default setting: 0.0 [s]

1172.9530.12 6.43 E-6

Remote Control - Commands R&S NRP-Z81/-Z85/-Z86

TRIGger:HYSTeresis[?] 0.0 to 10.0

TRIGger:HYSTeresis sets the hysteresis of the internal trigger threshold (parameter TRIGger:LEVel). Hysteresis is the magnitude (in dB) the trigger signal level must drop below the trigger threshold (positive trigger slope) before triggering can occur again. Exactly the opposite is the case with a negative trigger slope. The trigger hysteresis setting only applies to the INTernal trigger source.

The query returns the trigger hysteresis in dB.

Default setting: 0.0 [dB]

TRIGger:IMMediate

TRIGger:IMMediate triggers a generic trigger event that causes the sensor to immediately exit the WAIT_FOR_TRIGGER state irrespective of the trigger source and the trigger delay and start the

measurement. The command is the only means of starting a measurement when the trigger source is set to HOLD. Only one measurement cycle is executed irrespective of the averaging factor.

TRIGger:LEVel[?] 1.0e-6 to 0.1

TRIGger:LEVel sets the trigger threshold (in W) for internal triggering derived from the test signal. This setting is irrelevant to all other trigger sources. If an S-parameter device has been activated, the trigger level setting is always referenced to the input of this device. When switching the S-parameter device on or off, the set trigger level and the entry limits are automatically adjusted.

The query returns the trigger threshold in W.

Default setting: 0.0001

TRIGger:MASTer:STATe[?] OFF | ON

TRIGger:MASTer:STATe ON can be used to configure an R&S NRP-Z81/85/86 power sensor as the trigger master, enabling it to output a digital trigger signal in sync with its own trigger event. This makes it possible to synchronize several sensors (see the TRIGger:SYNChronisation:STATe command) and to perform measurements in sync with a signal at very low power, which normally would not allow signal triggering. The trigger signal which is output has a length of 1µs and the positive slope coincides with the physical trigger point. At present, it can be distributed to other R&S NRP-Zxx sensors only via the R&S NRP base unit and not via the R&S NRP-Z3/-Z4 interface adapter.

Generally, the trigger master is set to internal triggering (signal triggering) (the BUS and IMMEDIATE settings can also be used); the sensors acting as trigger slaves (TRIGger:MASTer:STATe OFF, TRIGger:SOURce:EXTernal) must be set to external triggering and positive trigger slope.

With the R&S NRP-Z81/85/86 power sensor, digital trigger signals are sent and received via a single differential line pair, the trigger bus. Only one instrument on the trigger bus can act as the trigger master. If the application is time-critical, the trigger-signal delay from the master to a slave must be taken into account. Using the R&S NRP, the delay is about 30 ns.

The query returns

 1 for OFF,  2 for ON.

Default setting: OFF

1172.9530.12 6.44 E-6

R&S NRP-Z81/-Z85/-Z86 Remote Control - Commands

TRIGger:SLOPe[?] POSitive | NEGative

TRIGger:SLOPe defines the slope of the triggering signal to be evaluated with internal or external triggering. Positive means increasing envelope power (with internal triggering) or increasing voltage (with external triggering). This command has no effect in the Burst Average mode and when used with the BUS, HOLD and IMMediate trigger sources.

The query returns

 1 for POSitive  2 for NEGative

Default setting: POSitive

TRIGger:SOURce[?] HOLD | IMMediate | INTernal | BUS | EXTernal

TRIGger:SOURce sets the trigger source.

 HOLD: Triggering only with the command TRIGger:IMMediate.  IMMediate: Automatic triggering without explicit event.  INTernal: Triggering by the measurement signal. Relevant parameters:

TRIGger:LEVel, TRIGger:HYSTeresis, TRIGger:DTIMe, TRIGger:DELay, TRIGger:HOLDoff and TRIGger:SLOPe.

 BUS: Triggering with the command *TRG or TRIGger:IMMediate.  EXTernal: Triggering via a hardware trigger bus, i.e. R&S NRP-Z3 USB adapter or another power

sensor, configured as a trigger master (currently only with the R&S NRP). Relevant parameters:

TRIGger:DELay, TRIGger:SLOPe, TRIGger:DTIMe, TRIGger:HOLDoff and TRIGger:SYNChronisation:STATe

The query returns

 1 for HOLD  2 for IMMediate  4 for INTernal  8 for BUS  16 for EXTernal

Default setting: IMMediate

TRIGger:SYNChronisation:STATe OFF | ON

TRIGger:SYNChronisation:STATe ON can be used to synchronize the sensors connected to the trigger bus (must currently be connected via the R&S NRP). Synchronization is achieved by enabling the trigger signal only when all the sensors are in the WAIT_FOR_TRIGGER state (wired-OR). This ensures that the measurements are started simultaneously and also that repetitions due to averaging start at the same time. It must be ensured that the number of repetitions is the same for all the sensors involved in the measurement. Otherwise, the trigger bus will be blocked by any sensor that has completed its measurements before the others and has returned to the IDLE state.

The synchronization function is turned off with TRIGger:SYNChronisation:STATe OFF. Default setting: OFF

1172.9530.12 6.45 E-6

Remote Control - Commands R&S NRP-Z81/-Z85/-Z86

Command

Parameter

Unit

Default setting

Page

* Commands

*IDN?

6.2

*RST

6.2

*TRG

6.2

*TST?

6.2

CALibration Commands

CALibration:DATA[?]

6.3 CALibration:DATA:LENGth?

Bytes

6.3

CALibration:ZERO:AUTO[?]

LFR | UFR | ONCE

6.3

CALibration:ZERO:FAST:AUTO[?]

ONCE

6.4

SENSe Commands

SENSe:AUXiliary[?]

NONE | MINMAX | RNDMAX

RNDMAX

6.10 SENSe:AVERage:COUNt[?]

1 to 220

1024

6.10

SENSe:AVERage:COUNt:AUTO[?]

OFF | ON | ONCE

6.10

SENSe:AVERage:COUNt:AUTO:MTIMe[?]

1.0 to 999.99

s 4 6.11

SENSe:AVERage:COUNt:AUTO:NSRatio[?]

0.0001 to 1.0

0.01

6.11

SENSe:AVERage:COUNt:AUTO:RESolution[?]

1 to 4

3 6.11

SENSe:AVERage:COUNt:AUTO:SLOT[?]

1 to <SENSe:POWer:TSLot :AVG :COUNt>

1 6.11 SENSe:AVERage:COUNt:AUTO:TYPE[?]

RESolution | NSRatio

RESolution

6.11

SENSe:AVERage:RESet

6.12

SENSe:AVERage:STATe[?]

OFF | ON

6.12

SENSe:AVERage:TCONtrol[?]

MOVing | REPeat

REPeat

6.12

List of Remote-Control Commands

The syntax of the R&S NRP-Z81/85/86’s remote-control commands is based to a limited extent on the SCPI 1999.0 standard.

Table 6-9 List of remote-control commands

1172.9530.12 6.46 E-6

R&S NRP-Z81/-Z85/-Z86 Remote Control - Commands

Command

Parameter

Unit

Default setting

Page

SENSe:BWIDth:VIDEo[?]

"300 kHz" | "1.5 MHz" | "5 MHz" | "FULL"

"FULL"

6.13 SENSe:BWIDth:VIDEo:LIST?

6.12

SENSe:CORRection:DCYCle[?]

0.001 to 99.999

1.0

6.12

SENSe:CORRection:DCYCle:STATe[?]

OFF | ON

OFF

6.13

SENSe:CORRection:OFFSet[?]

–200.0 to 200.0

0.0

6.14

SENSe:CORRection:OFFSet:STATe[?]

OFF | ON

OFF

6.14

SENSe:CORRection:SPDevice:LIST?

6.14

SENSe:CORRection:SPDevice:SELect[?]

Consecutive number of the S-parameter device

1 (can be modified by the user)

6.14

SENSe:CORRection:SPDevice:STATe[?]

OFF | ON

OFF (can be modified by the user)

6.14

SENSe:FREQuency[?]

50.0e6 to 18.0e9 (NRPZ81) …40.0e9 (NRP-Z85, NRP-Z86 Var. 40) or …44.0e9 (NRP-Z85, NRPZ86 Var. 44)

1.0e9

6.15

SENSe:FUNCtion[?]

"POWer:AVG"

6.15

SENSe:POWer:AVG:APERture[?]

1.0e-6 to 1.0

10.0e-6

6.18

SENSe:POWer:AVG:BUFFer:SIZE[?]

1 to 8192

1 6.19

SENSe:POWer:AVG:BUFFer:STATe[?]

OFF | ON

OFF

6.19

SENSe:POWer:AVG:SMOothing:STATe[?]

OFF | ON

OFF

6.19

SENSe:POWer:BURSt:DTOLerance[?]

0.0 to 0.3

1.0e-6

6.19

SENSe:POWer:TSLot[:AVG]:COUNt[?]

1 to 16

8 6.20

SENSe:POWer:TSLot[:AVG][:EXCLude]:MID:OFFSet [:TIME][?]

0.0 to 0.1

0.0

6.20 SENSe:POWer:TSLot[:AVG][:EXCLude]:MID:TIME[?]

0.0 to 0.1

0.0

6.20

SENSe:POWer:TSLot[:AVG]:WIDTh[?]

50e-9 to 0.1

0.0001

6.20

SENSe:SGAMma:CORRection:STATe[?]

OFF | ON

OFF

6.22

SENSe:SGAMma:MAGNitude[?]

0.0 to 1.0

0.0

6.22

SENSe:SGAMma:PHASe[?]

–360.0 to 360.0

degree

0.0

6.23

SENSe:STATistics[:EXCLude]:MID:OFFSet[:TIME][?]

0.0 to 0.3

0.0

6.23

1172.9530.12 6.47 E-6

Remote Control - Commands R&S NRP-Z81/-Z85/-Z86

Command

Parameter

Unit

Default setting

Page

SENSe:STATistics[:EXCLude]:MID:TIME[?]

0.0 to 0.3

0.0

6.23

SENSe:STATistics:OFFSet:TIME[?]

0 to 10.0

0.0

6.23

SENSe:STATistics:SCALe:X:MPWidth?

dB 6.23

SENSe:STATistics:SCALe:X:POINts[?]

3 to 8191

200

6.23

SENSe:STATistics:SCALe:X:RANGe[?]

0.01 to 100.0

6.24

SENSe:STATistics:SCALe:X:RLEVel[?]

–80 to +20

dBm

–30

6.24

SENSe:STATistics:TIME[?]

10.0e-6 to 0.3

0.01

6.24

SENSe:TIMing:EXCLude:STARt[?]

0.0 to 10.0

0.0

6.24

SENSe:TIMing:EXCLude:STOP[?]

0.0 to 51.2e-6

0.0

6.24

SENSe:TRACe:AVERage:COUNt[?]

1 to 65536

1 6.25

SENSe:TRACe:AVERage:STATe[?]

OFF | ON

6.26

SENSe:TRACe:AVERage:TCONtrol[?]

MOVing | REPeat

REPeat

6.26

SENSe:TRACe:ESAMpling:AUTO[?]

OFF | ON

6.27

SENSe:TRACe:MEASurement:ALGorithm [?]

HISTogram | INTegration | PEAK

HISTogram

6.27 SENSe:TRACe:MEASurement:AUTO[?]

OFF | ON

OFF

6.27

SENSe:TRACe:MEASurement:DEFine:DURation :REFerence[?]

0.0 … 100.0

50.0

6.28

SENSe:TRACe:MEASurement:DEFine:TRANsition :HREFerence[?]

0.0 … 100.0

90.0

6.28

SENSe:TRACe:MEASurement:DEFine:TRANsition :LREFerence[?]

0.0 … 100.0

10.0

6.28 SENSe:TRACe:MEASurement:OFFSet:TIME[?]

–x to 10.0

0.0

6.28

SENSe:TRACe:MEASurement:POWer:AVG?

6.28

SENSe:TRACe:MEASurement:POWer:HREFerence?

6.28

SENSe:TRACe:MEASurement:POWer:LREFerence?

6.29

SENSe:TRACe:MEASurement:POWer:MAX?

6.29

SENSe:TRACe:MEASurement:POWer:MIN?

6.29

SENSe:TRACe:MEASurement:POWer:PULSe:BASE?

6.30

SENSe:TRACe:MEASurement:POWer:PULSe:TOP?

6.30

SENSe:TRACe:MEASurement:POWer:REFerence?

6.30

SENSe:TRACe:MEASurement:PULSe:DCYCle?

6.30

1172.9530.12 6.48 E-6

R&S NRP-Z81/-Z85/-Z86 Remote Control - Commands

Command

Parameter

Unit

Default setting

Page

SENSe:TRACe:MEASurement:PULSe:DURation?

6.30

SENSe:TRACe:MEASurement:PULSe:PERiod?

6.30

SENSe:TRACe:MEASurement:PULSe:SEParation?

6.30

SENSe:TRACe:MEASurement:STATe[?]

OFF | ON

OFF

6.31

SENSe:TRACe:MEASurement:TIME[?]

0.0 … 10.0

0.0 (disabled)

6.31

SENSe:TRACe:MEASurement:TRANsition:ESAMpling :AUTO[?]

OFF | ON

6.31

SENSe:TRACe:MEASurement:TRANsition:NEGative :DURation?

6.31

SENSe:TRACe:MEASurement:TRANsition:NEGative :OCCurrence?

6.31

SENSe:TRACe:MEASurement:TRANsition:NEGative :OVERshoot?

6.32

SENSe:TRACe:MEASurement:TRANsition:POSitive :DURation?

6.32

SENSe:TRACe:MEASurement:TRANsition:POSitive :OCCurrence?

6.32

SENSe:TRACe:MEASurement:TRANsition:POSitive :OVERshoot?

6.32 SENSe:TRACe:MEASurement:TRANsition:SPERiod?

6.32

SENSe:TRACe:MPWidth?

6.32

SENSe:TRACe:OFFSet:TIME[?]

–x to 10.0

0.0

6.32

SENSe:TRACe:POINts[?]

3 to 8192

200

6.33

SENSe:TRACe:POINts:FPGA?

6.33

SENSe:TRACe:TIME[?]

50.0e-9 to 1.0

0.01

6.34

SENSe:TRACe:TIME:FPGA?

6.34

SYSTem Commands

SYSTem:FEATures?

6.35

SYSTem:INFO? [Item]

6.35

SYSTem:INITialize

6.37

SYSTem:LIMits?

6.37

SYSTem:MINPower?

6.37

SYSTem:RUTime

0 to 10.0

s 6.37

1172.9530.12 6.49 E-6

Remote Control - Commands R&S NRP-Z81/-Z85/-Z86

Command

Parameter

Unit

Default setting

Page

SYSTem:SUTime

0.0 to 10.0

1.0e-4

6.38

SYSTem:TRANsaction:BEGin

6.37

SYSTem:TRANsaction:END

6.38

Test Commands

TEST:SENSor?

6.39

Triggersystem Commands

ABORt

6.40

INITiate:CONTinuous[?]

OFF | ON

OFF

6.40

INITiate:IMMediate

6.41

TRIGger:ALEVel:STATe[?]

OFF | ON

OFF

6.41

TRIGger:ATRigger:STATe[?]

OFF | ON

OFF

6.41

TRIGger:COUNt[?]

1 to 2e9

1 6.42

TRIGger:DELay[?]

–51.2e-6 to 10.0

0.0

6.42

TRIGger:DTIMe[?]

0.0 to 10.0

200.0e-9

6.43

TRIGger:HOLDoff[?]

0.0 to 10.0

0.0

6.43

TRIGger:HYSTeresis[?]

0.0 to 10.0

0.0

6.44

TRIGger:IMMediate

6.44

TRIGger:LEVel[?]

1.0e-6 to 0.1

1e-4

6.44

TRIGger:MASTer:STATe[?]

OFF | ON

OFF

6.44

TRIGger:SLOPe[?]

POSitive | NEGative

POSitive

6.44

TRIGger:SOURce[?]

HOLD | IMMediate | INTernal | BUS | EXTernal

IMMediate

6.45 TRIGger:SYNChronisation:STATe

OFF | ON

OFF

6.45

1172.9530.12 6.50 E-6

R&S NRP-Z81/Z85/Z86 Transporting

1172.9530.12 7.1 E-1

7 Transporting

Packing

Use the original packaging material. It consists of antistatic wrap for electrostatic protection and packing material designed for the product. If you do not have the original packaging, use similar materials that provide the same level of protection.

Securing

When moving the product in a vehicle or using transporting equipment, make sure that the product is properly secured. Only use items intended for securing objects.

Transport Altitude

Unless otherwise specified in the data sheet, the maximum transport altitude without pressure compensation is 4500 m above sea level.

R&S NRP-Z81/Z85/Z86 Maintenance, Storage and Disposal

1172.9530.12 8.1 E-1

8 Maintenance, Storage and Disposal

The product does not require regular maintenance. It only requires occasional cleaning. It is however advisable to check the nominal data from time to time.

Regular Checks

If the power sensor is used frequently, check the RF connectors for visible damage - bent inner conductors, broken contact springs and so on. If the RF connectors are damaged, stop using the power sensor and contact the Rohde & Schwarz customer service.

Cleaning

1. Disconnect the power sensor:

a) From the DUT. b) From the computer or base unit.

2. Clean the outside of the power sensor using a lint-free cloth. You can dampen the cloth with water

but keep in mind that the casing is not waterproof. If you use isopropyl alcohol or ethanol instead of water, be careful not to damage the labeling. Do not use cleaning agents that can damage the instrument such as solvents, acids or alkalis.

3. Clean the RF connectors as follows:

a) Dislodge any particles using compressed air. b) Clean the inside and the connector threads using a foam swab or lint free cloth dampened with

isopropyl alcohol or ethanol.

Storage

Put plastic end caps on the RF connectors to protect them from damage. Protect the power sensor against dust.

Ensure that the environmental conditions, e.g. temperature range and climatic load, meet the values specified in the data sheet.

Disposal

Rohde & Schwarz is committed to making careful, ecologically sound use of natural resources and minimizing the environmental footprint of our products. Help us by disposing of waste in a way that causes minimum environmental impact.

Maintenance, Storage and Disposal R&S NRP-Z81/Z85/Z86

1172.9530.12 8.2 E-1

Disposing Electrical and Electronic Equipment

A product that is labeled as follows cannot be disposed of in normal household waste after it has come to the end of its service life. Even disposal via the municipal collection points for waste electrical and electronic equipment is not permitted.

Labeling in line with EU directive WEEE Rohde & Schwarz has developed a disposal concept for the eco-friendly disposal or recycling of waste

material. As a manufacturer, Rohde & Schwarz completely fulfills its obligation to take back and dispose of electrical and electronic waste. Contact your local service representative to dispose of the product.

Rohde&Schwarz NRP-Z81, NRP-Z85, NRP-Z86 Operating Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Safety Information

R&S NRP-Z81/-Z85/-Z86 Supplement

Unpacking the sensor

Connecting the sensor

Operation with the R&S NRP/NRP2 power meter

Connecting the power sensor

PC control

Hardware and software requirements

Operation via the R&S NRP-Z4 passive USB adapter

Connecting the sensor to the DUT

Operation via the Active USB Adapter R&S NRP-Z3

Operation via the R&S NRP-Z5 Sensor Hub

Equipment Supplied and Alternative Accessories

Ports and LEDs

Test Setup

Troubleshooting

Operation with other R&S test instruments

Hardware and software requirements

Overview

Fig. 2-1 Power Viewer – virtual power meter

Menus

Program module “Terminal”

Main control elements

Menus

Program module “Firmware Update”

Program module “Update S-Parameters”

Fundamentals

Procedure

R&S NRP-Z81/-Z85/-Z86 Remote Control – Fundamentals

6 Remote Control – Commands

Notation

Commands as per IEEE 488.2

*IDN? – Identification Query

*RST – Reset

*TRG – Trigger

*TST? – Self Test Query

CALibration

SCPI Commands

CALibration:DATA[?] <calibration data set as definite length block>

CALibration:DATA:LENGth?

CALibration:ZERO:AUTO[?] LFR | UFR | ONCE

CALibration:ZERO:FAST:AUTO[?] ONCE

SENSe (Sensor Configuration)

SENSe:AUXiliary[?] NONE | MINMAX | RNDMAX

SENSe:AVERage:COUNt[?] 1 to 220

SENSe:AVERage:COUNt:AUTO[?] OFF | ON | ONCE

SENSe:AVERage:COUNt:AUTO:MTIMe[?] 1.0 to 999.99

SENSe:AVERage:COUNt:AUTO:NSRatio[?] 0.0001 to 1.0

SENSe:AVERage:COUNt:AUTO:RESolution[?] 1 to 4

SENSe:AVERage:COUNt:AUTO:SLOT[?] 1 to <SENSe:POWer:TSLot:AVG:COUNt>

SENSe:AVERage:COUNt:AUTO:TYPE[?] RESolution | NSRatio

SENSe:AVERage:RESet

SENSe:AVERage:STATe[?] OFF | ON

SENSe:AVERage:TCONtrol[?] MOVing | REPeat

SENSe:BWIDth:VIDeo[?] "300 kHz" | "1.5 MHz" | "5 MHz" | "FULL"

SENSe:BWIDth:VIDeo:LIST?

SENSe:CORRection:DCYCle[?] 0.001 to 99.999

SENSe:CORRection:DCYCle:STATe[?] OFF | ON

SENSe:CORRection:OFFSet[?] –200.0 to 200.0

SENSe:CORRection:OFFSet:STATe[?] OFF | ON

SENSe:CORRection:SPDevice:LIST?

SENSe:CORRection:SPDevice:SELect[?] <device_number>

SENSe:CORRection:SPDevice:STATe[?] OFF | ON

SENSe:FREQuency[?] 50.0e6 to 18.0e9 (NRP-Z81), …40.0e9 (NRP-Z85, NRP-Z86 Var. 40) or …44.0e9 (NRP-Z85, NRP-Z86 Var. 44)

SENSe:FUNCtion[?] <sensor_function>

Short description of the measurement modes

Continuous Average

Burst Average

Timeslot Average

Trace (XTIMe:POWer)

Statistics (CCDF, PDF)

SENSe:POWer:AVG:APERture[?] 1.0e-6 … 1.0

SENSe:POWer:AVG:BUFFer:SIZE[?] 1 to 8192

SENSe:POWer:AVG:BUFFer:STATe[?] OFF | ON

SENSe:POWer:AVG:SMOothing:STATe[?] OFF | ON

SENSe:POWer:BURSt:DTOLerance[?] 0.0 to 0.3