Mini-Circuits RUDAT-6000-110, RUDAT-6000-90, RUDAT-6000-60, RUDAT-13G-90, RUDAT-6000-30 User Manual

AN-49-005 Rev.: D (August 7, 2016) M156027 (R90553) File: AN-49-005(D).doc

This document and its contents are the property of Mini-Circuits

User Guide

RS232 & USB control,
Input Impedance: 50 Ω

USB, RS232, SPI & Ethernet

Programable Attenuators

Ethernet & USB control,

Input Impedance: 50 Ω

Important Notice

This guide is owned by Mini-Circuits and is protected by copyright, trademark
and other intellectual property laws.

The information in this guide is provided by Mini-Circuits as an accommodation
to our customers and may be used only to promote and accompany the
purchase of Mini-Circuits’ Parts. This guide may not be reproduced, modified,
distributed, published, stored in an electronic database, or transmitted and the
information contained herein may not be exploited in any form or by any means,
electronic, mechanical recording or otherwise, without prior written perm ission
from Mini-Circuits.

This guide is subject to change, qualifications, variations, adjustments or
modifications without notice and may contain errors, omissions, inaccuracies,
mistakes or deficiencies. Mini-Circuits assumes no responsibility for, and will
have no liability on account of, any of the foregoing. Accordingly, this guide
should be used as a guideline only.

Trademarks

Microsoft, Windows, Visual Basic, Visual C# and Visual C++ are registered
trademarks of Microsoft Corporation. LabVIEW and CVI are registered
trademarks of National Instruments Corporation. Delphi is a registered
trademark of Delphi Technologies, Inc. MATLAB is a registered trademark of
The MathWorks, Inc. Agilent VEE is a registered trademark of Agilent
Technologies, Inc. Linux is a registered trademark of Linus Torvalds. Mac is a
registered trademark of Apple Inc. Python is a registered trademark of Python
Software Foundation Corporation.

All other trademarks cited within this guide are the property of their respective
owners. Neither Mini-Circuits nor the Mini-Circuits Programmable Att enuators
are affiliated with or endorsed or sponsored by the owners of the above
referenced trademarks.

Mini-Circuits and the Mini-Circuits logo are registered trademarks of Scientific
Components Corporation.

Mini-Circuits

13 Neptune Avenue
Brooklyn, NY 11235, USA
Phone: [phone]
Email: [e-mail]
Web: www.minicircuits.com

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Table of Contents

Chapter 1 – General Information ................................................................... 5-9

1.1 Scope of the User Guide ................................................................................ 5

1.2 Warranty ........................................................................................................ 5

1.3 Definitions ...................................................................................................... 5

1.4 General Safety Precautions ........................................................................... 5

1.5 Introduction .................................................................................................... 5

1.6 Service and Calibration .................................................................................. 6

1.7 Contact Information........................................................................................ 6

1.8 Technical ................................................................................................... 6-9

1.8.1 Features of Mini-Circuits Programmable Attenuators .................................................. 6

1.8.2 Model Selection Guide ................................................................................................. 7

1.8.3

Intended Applications ............................................................................................... 8

1.8.4 Supported Software Environments .............................................................................. 5

1.8.5 Included Accessories and Options ............................................................................... 8

1.8.6 Conformity .................................................................................................................... 9

Chapter 2 – Installation and ...................................................................... 10-15

2.1 Software Setup .............................................................................................10

2.2 Installation ............................................................................................... 11-12

2.3 Attenuator Physical Setup ....................................................................... 13-16

2.3.1 For USB Control: ........................................................................................................ 13

2.3.2 For RS232 Control (RUDAT) ..................................................................................... 13

2.3.3 For Ethernet Control (RCDAT) ................................................................................... 15

Chapter 3 – Using the Attenuator Models ................................................. 16-30

3.1 Starting the GUI Program ....................................................................... 16-19

3.2 Operating the Attenuator with the GUI Program ..................................... 19-22

3.3 Changing Ethernet Settings Using the GUI Program .............................. 23-24

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Table of Contents

3.4 Sweep and Hop functions .............................................................................25

3.4.2 PC Control Mode (Sweep & Hop Sequences): .......................................................... 25

3.4.3 High Speed Mode (Sweep & Hop Sequences): ......................................................... 25

3.4.5 Attenuator Switching Time: ........................................................................................ 26

3.5 Alerts During Operation of the Programmable Attenuator .............................27

3.6 Firmware Update .................................................................................... 28-30

Chapter 4 – Revision History ........................................................................31

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1 Chapter 1 – General Information

1.1 Scope of the User Guide

This User Guide provides general introduction, instal lation instructions and operating
information for Mini-Circuits USB & RS232 programmable attenuators (RUDAT series) and USB
& Ethernet programmable attenuators (RCDAT and RC4DAT series)

1.2 Warranty

See Mini-Circuits website http://www.minicircuits.com/support/ordering.html for warranty
information.

1.3 Definitions

Note: A note advises on important information you may need to ensure proper operation of the equipment.

There is no risk to either the equipment or the user.

A caution advises about a condition or procedure which can cause damage to the
equipment (no danger to users).

A warning alerts to a possible risk to the user and steps to avoid it. DO NOT proceed
until you are sure you understand the warning.

1.4 General Safety Precautions

There are no general safety precautions for using Mini-Circuits programmable attenuators.

1.5 Introduction

Mini-Circuits has developed two series of programmable attenuators, as shown in Figure 1.3.
The RUDAT series, which can be controlled via standard USB or RS232 ports(some also
support SPI), and the RCDAT series, which can be controlled via standard USB or Ethernet­TCP/IP(Telnet or HTTP protocols). These programmable attenuators can operate up to 8000
MHz with an attenuation resolution 0.25 dB and up to 13,000 MHz with resolution of 0.5 dB.
Attenuation ranges from 30 to 120 dB are availa bl e. These models are plug & play devices
which require no drivers for any of the supported interfaces. With the supplied GUI software, or
most common lab test software, you can remotely set any attenuation level in range almost
instantly. The attenuators are light, comp act and can be powered from the USB bus or external
power supply, increasing system flexibility.
Using their Ethernet control the RCDAT models ca n be controlled from almost any computer, or
even a smartphone with a network connection from any where in the world.

Figure 1.3: Mini-Circuits RUDAT-6000-90

CAUTION

WARNING

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1.6 Service and Calibration

None of the programmable attenuator models req ui re any periodic service or calibration. The
only user service possible for the models is external cleaning of the case and connectors as
needed. Do not use any detergents or spray cleaning solut i ons to clean the attenuators. To
clean the connectors use an alcohol solution, and to clean the case a soft, damp cloth.

1.7 Contact Information

Mini-Circuits inc.
13 Neptune Ave
Brooklyn, NY 11235
Phone: [phone]
General Fax: [phone]
Sales / Customer Service Fax: [phone]

[e-mail]

For regional offices and tech support see

http://www.minicircuits.com/contact/offices.html

1.8 Technical Description

1.8.1 Features of Mini-Circuits Programmable Attenuators

• Wide attenuation range (model dependent, see section 1.8.2)

• Wide frequency range (model depe ndent, see section 1.8.2)

• Fine attenuation resolution (0.25 dB or 0.5 dB)

• Multiple control options

• Easy installation and operation

• Plug & Play devices, no driver installation required

• ActiveX COM object and .Net class library for use with other software: C++, C#, CVI®, Delphi®,

LabVIEW® 8 or newer, MATLAB® 7 or newer, Python, Agilent VEE®, Visual Basic®, Visual Studio® 6 or
newer, and more (see

AN-49-001 for full details)

• User friendly Graphical User Interface for any Windows

®

32 or 64 bit computer. Command line support

for Linux

®

computers.

• Mounting bracket (optional)

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1.8.2 Model Selection Guide

Model Name

Num. of

Channels

Frequency

Range

(MHz)

Attenuation

Range

(dB)

Attenuation

Resolution

(dB)

Max Input

Power

(dBm)

Control Protocols

RUDAT-4000-120

1 1 - 4000 120 0.25 20 USB & RS232

RUDAT-6000-110

1 1 - 6000 110 0.25 20 USB & RS232

RUDAT-6000-90

1 1 - 6000 90 0.25 20 USB & RS232

RUDAT-6000-60

1 1 - 6000 60 0.25 20 USB & RS232

RUDAT-6000-30

1 1 - 6000 30 0.25 20 USB & RS232

RUDAT-13G-90

1 10 - 13000 90 0.5 23 USB, RS232 & SPI

RCDAT-4000-120

1 1 - 6000 110 0.25 20 USB, HTTP & Telnet

RCDAT-6000-110

1 1 - 6000 90 0.25 20 USB, HTTP & Telnet

RCDAT-3000-63W2

1 50 - 3000

63 1 33 USB, HTTP & Telnet

RCDAT-6000-90

1 1 - 6000 90 0.25 20 USB, HTTP & Telnet

RCDAT-6000-60

1 1 - 6000 60 0.25 20 USB, HTTP & Telnet

RCDAT-6000-30

1 1 - 6000 30 0.25 20 USB, HTTP & Telnet

RCDAT-8000-30

1 1 - 8000 30 0.25 28 USB, HTTP & Telnet

RCDAT-8000-60

1 1 - 8000 60 0.25 28 USB, HTTP & Telnet

RCDAT-8000-90

1 1 - 8000 30 0.25 28 USB, HTTP & Telnet

RC4DAT-6G-90

4 1 - 6000 90 0.25 23 USB, HTTP & Telnet

For detailed model performance, data and graphs, outline drawing, ordering information and
environmental specifications click on the model part number.

Figure 1.8.2a RUDAT & RCDAT Functional Block Diagrams

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1.8.3 Intended Applications

Mini-Circuits programmable attenuators are intended for indoor use in:

- Lab and test equipment setups for both manual an d aut om ated measurements.

- Control systems

- Production test equipment
The models can be used by anyone familiar with the basics of electronic measurements or
electronic control systems.

1.8.4 Supported Software Environments

Mini-Circuits programmable attenuators have been tested in the f ollowing operating systems:
32 bit systems: Windows 10, Windows 8, Windows 7, Windows Vista, Windows XP,

Windows 98 and Linux.
64 bit systems: Windows 10, Windows 8, Windows 7, Windows Vista and Linux
The attenuators will work with almost any softwa re environment that supports ActiveX or .Net
including: C++, C#, CVI

®

, Delphi®, LabVIEW® 8 or newer, MATLAB® 7 or newer, Python,

Agilent VEE

®

, Visual Basic®, AutoIT, Visual Studio® 6 or newer, and more (see AN-49-001 for full

details)

Additionally the HTTP and Telnet protocols can op erate from almost any computer, or even a
mobile device/smartphone with a network conne ct ion.
For more information see programming handbook on our web site.

1.8.5 Included Accessories and Options

1.8.5.1 RUDAT models are supplied with

• 2.6 ft (0.8m) USB cable (Type A to Type Mini-B)

1.8.5.2 RCDAT and RC4DAT models are supplied with the

• 2.6 ft (0.8m) USB cable (Type A to Type Mini-B)

• AC/DC power adapt er suitable for a wide selection of wall sockets

The following additional accessories are also a vail able:

• Mounting bracket

• 6.9 ft (2m) USB cable (Type A to Type Mini-B)

• 6 ft (1.8m) RS232 cable (9 Pin D-Sub Male-Female)

• AC/DC power adapt er suitable for a wide selection of wall sockets

Figure 1.8.2b

RC4DAT Functional Block Diagram

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1.8.6 Conformity

Mini-Circuits series of programmable attenuators conform to all requirements for the following
international standards

:

RoHS – The models comply with EU directi ve for Restriction of Hazardous Substances

for 6 substances.

USB 2.0 – The models meet the specifications of the Universal S erial Bus Ver. 2.0

communication standard as described by USB -IF.

USB HID – The models meet the requirements for Universal Serial Bus Human

Interface Devices according to USB-IF’s Device Class Definition for Human
Interface Devices firmware rev. 1.11

RUDAT series models also comply with:
RS232 – The RUDAT series models meet all requirements for RS232 standard.

RCDAT series models also comply with:
TCP/IP – The RCDAT series models’ Ethernet communication complies with the

specifications of the Transmission Control Prot ocol (TCP) and Internet
Protocol (IP) as defined in RFC 791 and RFC 793.

HTTP – The RCDAT series models’ support all requirem ents for communicating with

the Hypertext Transfer Protocol (HTTP) as defined in RFC 1945.

Telnet – The RCDAT series models’ support all requirem ents for communicating with

the Telnet protocol, as defined in RFC 854

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2 Chapter 2 – Installation and Setup

2.1 Software Setup

System requirements for the RUDAT or RCDAT models are a computer (Pentium II or
better) with the following support depending on the c ontrol method used:

RS232 control

SPI

USB control

Ethernet control

Serial COM port

3-wire I/O control

at LVTTL

USB HID

Network connection

When using the supplied power adaptor a power sou rce of 110-220VAC (with socket
matching one of the two pin plugs provided) is also needed.

To run the GUI program a Windows operating system for either 32 or 64 bits is required
as well.

If you have had any problems installing the software, we’re here to help.

Try following these complete step-by-step instru ct ions. If you still experience problems,
give us a call at Mini-Circuits Worldwide Technical su pport . It’s [phone] or e-mail
[e-mail] for North Americ a or go to minicircuits.com/contact/worldwide_
tech_support.html for other regional numbers and addres ses.

2.1.1 First save all work in progress and close any other programs that may be running.

2.1.2 Next, insert the Mini-Circuits CD into the CD-ROM drive, or download the full CD

software from minicircuits.com. If installing from files downloaded from the web, unzip the
downloaded files to a temporary folder on your local computer, then open the file folder you
created, and double-click the “Install” icon.
Note: Saving the directory in an excessively long path may result in problems during

installation.

2.1.3 If installation from the CD does not start automatically, run

install.exe from the <CD drive> root directory.

Figure 2.1.3 CD file listing window

PC-DAT-CD (D:)

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2.2 Installation

2.2.1 The installer window should now appear. Click the “Install Now” button.

Figure 2.2.1 Installation window

2.2.2 The license agreement should now appear. To proceed, click “I Agree” and the

“Continue” button.

Figure 2.2.2 License agreement

2.2.3 The installation program will launch. Click the “OK” button to continue.

Figure 2.2.3 Installation program window

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2.2.4 The destination directory window will appear. In most cases, the default will

be your computer’s hard drive (C:)\Program Files\ Mini-Circuits Programmable Attenuator\.
Change it if you prefer. Then click the large button at the top to continue.

Figure 2.2.4: Destination directory window

2.2.5 The Program Group window will appear. This window allows you to select the

program group under which the link for the attenuator control program in the Start Menu will be
created. If you change the Program Group for this software, be sure to record that information
together with your destination address. Click on “ Continue” to proceed.

Figure 2.2.5: Program group window

2.2.6 In a second or two, your installation will be complete. Click “OK” to

close the installer.

Figure 2.2.6: Installation complete

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2.3 Attenuator Physical Setup

The maximum allowed RF input for programmable attenuators models is reduced

at low frequencies. Check the individual model datasheet and do not exceed the
specified limits.

2.3.1 For USB Control:

-Connect USB cable between the attenuator’s USB port and the computer’s USB port.

-Note the attenuator’s USB indicator lights up.

-Connect attenuator input and output SMA ports to your system.

2.3.2 For RS232 Control (RUDAT) with power via USB

-Connect D-Sub9 cable between RUDAT unit D-Sub port and computer serial port.

-Connect plug suited for available wall socket to the provided power adaptor and plug in
the power adaptor (if a USB bus is available it can be used instead of the power
supply).

-Connect USB cable between supplied power adaptor and RUDAT USB port.

-Note the Indicator lights up.

-Connect RUDAT input and output SMA ports to your sy st em .

Figure 2.3.1: RUDAT USB setup

CAUTION

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5V AC/DC

wall power adaptor

Connect to PC’s

Serial port

MUSB

-

CBL

-3

+ or Eqv.

Connect to

User system

D-SUB9-MF-6+

or Eqv.

Connect to

User system

Figure 2.3.2: RUDAT RS232 setup option1

2.3.3 For RS232 Control (RUDAT) with power via D-Sub Pin#1

This option is supported in the following units:

Model P/N

Serial Number

RUDAT-6000-30

11405010010 and greater

RUDAT-6000-60

11407150001 and greater

RUDAT-6000-90

11403230000 and greater

RUDAT-6000-110

All serial Numbers

RUDAT-4000-120

All serial Numbers

This option requires the use of an RS232 port wired t o supply +5VDC at Pin#1

-Connect D-Sub9 cable between RUDAT unit D-Sub port and custom RS232 port.

-Note the Indicator lights up.

-Connect RUDAT input and output SMA ports to your sy st em .

Figure 2.3.3: RUDAT RS232 setup option 2

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2.3.4 For Ethernet Control (RCDAT)

-Connect plug suited for available wall socket to the provided power adaptor and plug in
the power adaptor (if a USB port is available it can be used instead of the AC mains
power adapter).

-Connect USB cable between supplied power adaptor and RCDAT USB port.

-Note the USB indicator lights up.

-Connect a standard network cable between RCDAT unit RJ45 socket and network

port.

-Note the network indicators on the RJ45 socket of the RCDAT unit light up after a few

seconds.

-Connect RCDAT input and output SMA ports to your system.

Figure 2.3.4: RCDAT Ethernet setup

2.3.5 For SPI Control (RUDAT-13G-90)

- Connect the SPI Clock, Data and Latch Enable pins ( i dentified in the model
datasheet) to your I/O control device

-Connect power as for RS232 control

-Note the Indicator lights up.

-Connect RUDAT input and output SMA ports to your system.

Notes:

1. Check model datasheet for SPI voltage and timing instructions for setting the
attenuation.

2. In SPI control the attenuation l evel can be set however there is currently there is no
provision for reading unit status via SPI, or any other functions supported for USB and
RS232 control.

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3.

3 Chapter 3 – Using the Attenuator Models

The RUDAT, RCDAT and RC4DAT models are s upplied along with API programming objects
(DLL files) to allow easy control by most common lab test software (See attenuator
programming manual for details) and with a Windows GUI program to set the attenuation level
manually.

To start the program go to the Start menu and select All Programs>Mini-Circuits

RUDAT (default), or go to the other destinat ion address you selected during installation (section

2.2.5). The “Mini-Circuits RUDAT” icon should be waiting there for you. Click on it and get
started!

3.1 Starting the GUI Program

3.1.1 When started the GUI will show the control selection screen allowing you to

choose RS232, USB, HTTP, or Telnet control.

3.1.2 To start a RUDAT unit in RS232 control select the COM port the unit is

connected to from the drop box in the left section and click on the RS232 button. If no unit is
found at the COM port selected an alert will pop up advising no unit is connected. Click “Yes” to
proceed anyway, or “No” to return to startup scree n. If you get this alert when unit is connected
check the power and data connections to the attenuator and verify you selected t he correct
COM port.

Figure 3.1.2: No unit in RS232 alert

Figure 3.1.1: Startup Screen

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3.1.3 To start an RUDAT, RCDAT or RC4DAT unit in USB control click on the

USB button in the center. If no unit is connected to US B an alert will pop up. Click “OK” to return
to startup screen. If you get this alert with the unit connected to USB check the attenuators USB
indicator

Figure 3.1.3: No USB device alert

3.1.4 If multiple units are connected via USB, the unit selection screen will appear

with a list of serial numbers and model names for connected units. Sel ect the unit you wish to
start with and click “OK”, or click “Cancel” to exit the program. The program can handle up to 24
units connected simultaneously. If only one unit i s connected via USB, the program will go
directly to the attenuator control screen.

Figure 3.1.4: Unit selection screen

3.1.5 To start an RCDAT or RC4DAT unit with Ethernet control, either enter

the IP address of the unit (If using HTTP with a port ot her t han 80 port will also be needed) of
the unit in the “IP address” field or click on the search i con next to it to find all Mini-Circuits
attenuators connected to the network.

Note: When connecting to the unit with Ethernet control for the f i rst time you may need to
change the factory default Ethernet configurati on to match your network configuration. See

section

3.3 or the programming manual for details.

3.1.6 After clicking on the search icon The IP search will pop up with a list of

attenuators IP addresses found and their HTTP ports on the left side of the screen, and full
details of each unit on the right. Mark the IP address you wish to use and click select. The
search window will close and the IP address will b e entered in the IP address field of the startup
screen automatically.

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Figure 3.1.6: Ethernet IP search window

Notes:

1) To refresh the list of units found click on the Search button.

2) The search function uses ports UDP 4950 and UDP 4951 for communication, ensure
your firewall allows access to these ports.

3.1.8 After entering the IP address enter your password if you set one (see section

3.2), select the communication protocol you wish to use (HTTP or Telnet) and click start, the
Attenuation control screen will open.

Figure 3.1.8: Ethernet startup screen

Note: changing Ethernet settings is only possible via USB control, see section 3.2 for details.

3.1.9 Telnet or HTTP text commands can also be used to control the attenuator. Just

type the command in the address field of your internet browser or implement a Get/Post HTTP
function in your selected application (for HTTP), or establish a Telnet connection. A full list of
the possible commands and queries is available in Mini-Circuits Programming handbook, and in
a text file on the CD provided with the Attenuator, in t he Ethernet directory.

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3.2 Operating the Attenuator with the GUI Program

3.2.1 Once you’ve selected the control method to use, the main screen of the

GUI program will appear.

3.2.2 Manual Mode functions:

#

Name

Descriptions

1

Ethernet Config

Opens a Ethernet configuration window (See section 3.3 for details)

2

Firmware

Opens the Firmware update window ( available only in USB control)

3

Configuration

Settings

Opens a pop-up window allowing the user to specify attenuator state at power

up (See section 3.2.5 for details) and set the step size used in the manual

attenuation setting.

4

Connection Options

Returns to the startup screen

5

Model description

Field describing the model, this shows model part number, serial number and
connection details.

6

Current Attenuation

The value the attenuator is currently set to.

7

Manual Attenuator

Attenuation value to be set. This can be changed by either typing a value, or
using the scroll bar and arrows to change the attenuation.

8

Apply

Applies the changes made to the atten uation setting.

9

Auto Apply

When this check box is selected every ch ange in attenuation setting will be

applied immediately, when it is not selected user must click ‘Apply’ to execute

the changes.

Figure 3.2.1a: Main screen(Single channel model)

4

7 8 3

2

1

5

6

9

10

11

12

13

14

15

16

17

18

19

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3.2.3 Automatic mode functions:

#

Name

Descriptions

10

Sweep Mode

When selected, allows setting an attenuation sweep with user defined start,
stop, step and dwell time values.

11

Hop Mode

When selected, allows setting a table of user defined attenuation and dwell
time which the attenuator will "hop" through.

12

Continuous

When selected, the attenuator will repeat the user defined sweep or hop u ntil
the Stop button is clicked.

13

Duration

When selected the attenuator will re peat the user defined sweep or hop

sequence for the time specified (c an be defined in milliseconds, seconds,

minutes or hours).

14

No. of Cycles

When selected the attenuator will re peat the user defined sweep or hop
sequence for the number of cycles specified.

15

High Speed

(only available with Firmware Rev . B1 or greater) Enables high speed Sweep
and Hop functions. See section 3.4.3 for det ail s

16

PC control

Default setting. Sweep and Hop instr uctions are sent individually to t he unit
See section 3.4.2 for details.

17

Bidirectional

When selected, the attenuator will sw eep or hop through the user defined

sequence, then repeat in the reverse direction (sweeping from stop to start or

hopping from last to first point in the hop list).

18

Start & Stop

Start and Stop the automatic run (Sweep or Hop) at the current attenuation
setting.

19

Icons

In Hop mode allows clearing all current settings, opening a file of saved
settings or saving current settings. Not available in Sweep mode.

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3.2.4 Multi-Channel functions(Multi channel models only):

#

Name

Descriptions

1

Controlled channels

Any attenuation setting specif i ed in the manual control field of the channel will
affect all channels selected in the ‘C ontrolled Channels’ field.

2

Sweep mode

When selected all four channels automation will be in sweep mode

3

Hop mode

When selected all four channels automation will be in hop mode

4

Channel selection

Selects which channels the sweep or hop applies to

5

Automation settings

Same as for single channel model, but apply to all channels.

Figure 3.2.4: Main screen(Multi - channel model)

1

2

3

4

5

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3.2.5 Configuration Settings

Clicking on ‘configuration Settings’ opens a popup window which allows the user to set the
following parameters:

• Device Address -
o Set the device's USB address in the 1 – 255 range (factory default 255)

• Power Up State -

o For 30, 60 or 90 dB models, Firmware A4 or newer required
o The attenuator can be configured to power up with isolation setting(factory

default), a user defined attenuation value, or the last attenuation value set

o In Multi-channel models – the attenuation state each channel will assume on

power up can be set individually.

Notes:

1. If the GUI is not shut down before the at tenuator is disconnected the last attenuation
state will not be saved and if “set last defined attenuation” was selected the attenuator
will start up in high isolation state

2. Shutting down and then starting up the GUI repeatedly in less than 3 minutes while “set
last attenuation” is enabled may result in attenuat or resetting to isolation state at power
up due to last attenuation state not being recorded correctly.

.

• Manual attenuation Step size -

o Gross tune is the step size for each click on scroll bar.
o Fine Tune is the step size for the arrows

Figure 3.2.5: Configuration Settings screen

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3.3 Changing Ethernet Settings Using the GUI Program

3.3.1 Factory default settings for RCDAT and RC4DAT models are Dynamic IP

(DHCP) using Port 80 (see Figure 3.3.2). Changing these settings can be done only via USB
control. In the USB control GUI (see section 3.1.3) click on the Ethernet Settings button.

Figure 3.3.1: USB Control

3.3.2 The Ethernet Settings screen will open showing the current configuration.

Figure 3.3.2 shows the factory default of the programmable attenuators. If these settings are
appropriate for your local network then you do not need to access the setup before connecting
the attenuator to the network and can connect to t he attenuator via Ethernet as described in
section 3.1.5.

Figure 3.3.2: Ethernet Settings screen (showing factory default state)

9 4

2

6

11

1

3

7

10

12

5

8

Figure 3.3.1: USB Control

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3.3.3 The Ethernet Configuration settings are:

#

Name

Description

1

MAC Address

Media Access Control address – a unique, unchanging identifier for the
attenuator unit.

2

Network
gateway

IP address of the network gateway. When DHCP is selected this is assigned
by the server and will change according to the server.

3

Subnet Mask

The network's subnet mask. When DHCP is selected this is assigned by the
server and will change according to t he s erver.

4

IP Address

The IP address of the unit on the network. When DHCP is selected this is
assigned by the server and will change according to the server.

5

Use DHCP

When selected the attenuator will quer y the server for appropriate

parameters with no input from t he us er. Any manually entered IP address,

subnet mask and network gateway will b e disregarded.

6

Refresh

Request IP address, gateway and sub net mask from server.

7

Copy state

Copies current state of dynamic IP to static IP, not available when DHCP is
selected.

8

Static

Configuration

When DHCP is not selected the user must specify the values below which
will not be changed by the server.

9

Telnet Port

Port to be used for telnet communication. Cannot be changed by user

10

Store

After you've made all changes you want to click on this button to save the
settings.

11

Password

To restrict remote access to the attenuator select "Use Pass word" and enter
the desired password below (up to 20 characters).

12

HTTP Port

Specify the port to use for HTTP communication on the network (default 80).

Note port address does not get assigned by the server when DHCP is

selected. Port 23 is reserved for Telnet communication and cannot be us ed.

3.3.4 After making the changes you want, click on "Store" and the changes

will be saved to the attenuator's memory.

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3.4 Sweep and Hop functions

3.4.1 The GUI provides the ability to carry out an automated sequence of

attenuations settings, either a sequential sweep from a start value to a stop value, with a fixed
step size (increment or decrement) and dwell time, or an arbitrary "hop" sequence of attenuation
and dwell time values.

3.4.2 PC Control Mode (Sweep & Hop Sequences):

This is the default mode, available on all RUDAT, RCDAT and RC4DAT attenuators. In this
mode, the attenuation sweep or hop sequence is managed by the GUI so each attenuation
value is sent to the attenuator one at a time, as needed. Since the GUI is managing the
sequence it is always able to display the current attenuation state but each attenuation setting is
subject to communication delays between the PC an d at tenuator. Communication delays vary
by computer but in practice this dictates a minimum dwell time in the order of 5 ms or more for
USB 3.0 connections, or longer with USB 1 or 2 connections (10 - 20 ms is not uncommon for
older computers or slower connections).

3.4.3 High Speed Mode (Sweep & Hop Sequences):

This mode is only available for units with firmware version B1 or later (see section 3.6 for the
firmware update process). Note: Units with older s erial numbers may not support firmware
upgrade in the field. See section 3.6 for supported serial numbers.

In high speed mode, the attenuation sweep paramet ers or list of attenuation hop values are
loaded into the attenuator's internal memory. This ini tial configuration step, along with the Start
and Stop commands from the GUI, are subject to the same communication delays as above but
once executed the timing is controlled by the attenuator's internal reference and no further PC
communication is required. This enables high speed attenuation sequences with dwell times as
low as 600 µs(400 µs for RCDAT-3000-63W2). Sinc e the PC communication delays are
significantly longer than this minimum dwell time, the GUI will not be able to display the current
attenuation state in this mode until the sequence is stopped.

Figure 3.4: Plot of signal when sweeping attenuation 0-40dB in 10 dB steps (scale 2ms/div)

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3.4.4 Multi-Channel models:

In models with multiple channels, the user needs to select which channels will be active during a
hop or sweep sequence. This is done by checking check box over the channel sweep
parameter in sweep mode, or the ‘Active Channel’ marker to the right of the hop sequence table
in hop mode. Each channel channel can have its own at tenuation settings, but the timing must
be the same for all channels in a unit. This means that if sweeps of different lengths were set
with a set number of cycles, all four channels will swe ep onl y until the channel with the shortest
sweep completed the specified number of cycles.

3.4.5 Attenuator Switching Time:

Attenuator models are specified with typical swit ching times of 650 to 900 ns depending on the
model, but even faster transitions can be observed in practice. Switching time in this instance is
defined as the time during which the attenuator is tra nsit i oning from one attenuation level to the
next. This short switching time means the RF signal path has an undefined attenuation state for
as short a time as possible during changes in attenuation levels. Switching time is distinct from
minimum dwell time during a sweep or hop sequence which is generally dictated by
communication and control delays rather t han RF switching characteristics.

Some typical switching time measurements applicable to the programmable attenuator series
are presented below:

Ax = 711.998 µs

Ay = 143 mV

Ax = 472.735 µs

Ay = 25.25 mV

Bx = 712.198 µs

By = 16 mV

Bx = 473.097 µs

By = 2.81 mV

Δx = 200.000 ns

Δy = -127 mV

Δx = 362.000 ns

Δy = -22.44 mV

Ax = 174.907 µs

Ay = 140 mV

Bx = 175.510 µs

By = 46 mV

Δx = 603.000 ns

Δy = -100 mV

Figure 3.4.5a: Typ. Switching time from 120 to

0 dB(RCDAT-4000-120); 200 ns switching time

Figure 3.4.5b: Typ. Switching time from 45 to

15 dB(RCDAT-4000-120; 362 ns switching time

Figure 3.4.5c: Typ. Switching time from 10 to 0

dB(RUDAT-13G-90); 600 ns switching time

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3.5 Alerts During Operation of the Programmable Attenuator

3.5.1 If you type an attenuation value the attenuator cannot meet – either too large a

number, or resolution of under 0.25 dB. An alert will pop up and the attenuation setting will not
change. Click OK to dismiss the alert and enter a valid attenuation value.

Figure 3.3.1a: Value too large for model Figure 3.3.1b: Resol ution too small for model

3.5.2 If the attenuator is disconnected during operation, or experiences a problem with the

power supply an alert will pop up. Click OK to close the program and check the power and data
connections to the unit before restarting the program.

Figure 3.3.2: data or power disconnected alert

3.5.3 The RUDAT, RCDAT and RC4DAT models can also be controlled automatic ally using

most common lab test software and the provided DLL files, or yo ur own custom programs. For
more information on this see the Programming Guide on the included CD or download it from
our website at

http://www.minicircuits.com/support/software_download.html

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3.6 Firmware Update

The firmware upgrade process requires a computer running a Windows
operating system and with the latest Mini-Circuits GUI (Graphica l Us er
Interface) program installed for the PTE model to be upgraded.

3.6.1 Model serial numbers which support firmware Upgrade are:

Model P/N

Serial Number

RUDAT-6000-30

11505310041 and greater

RUDAT-6000-60

11506070001 and greater

RUDAT-6000-90

11505310001 and greater

RUDAT-6000-110

11510110020 and greater

RUDAT-4000-120

11510110020 and greater

RUDAT-13G-90

All units

RCDAT-6000-30

All units

RCDAT-8000-30

All units

RCDAT-6000-60

All units

RCDAT-8000-60

All units

RCDAT-3000-63W2

All units

RCDAT-6000-90

All units

RCDAT-8000-90

All units

RCDAT-6000-110

All units

RCDAT-4000-120

All units

RC4DAT-6G-90

All units

3.6.2 All products are shipped with the latest available firmware and an

update is usually not required. Mini-Circuits occasionally makes firmware update files available
as a courtesy to add additional features or correct known issues. Please contact

[e-mail] for details.

3.6.3 The upgrade is done using a.hex file provided and the programmable

attenuator GUI. The GUI must be started in USB control (See section 3.1) to allow firmware
upgrade. Click on the Firmware button on the lef t side of the screen.

Note: If the file name of the .Hex file is changed it will not be recognized a s a valid firmware file.

A power interrupt, to either the computer or the attenuator while the firmware is being
updated may cause the firmware to be corrupted. It is therefore recommended to only
update the firmware while both the attenuator and the computer are connected to an
Uninterruptable Power Supply (UPS).

CAUTION

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3.6.4 The Firmware button will open the firmware - info window to open (See

Fig. 3.6.4). The ‘Firmware’ listed is the version of the firmware installed in your attenuator. Click
on “Update Firmware” to select a new firmware version to install or click ‘Exit’ to close the
firmware – info window.

Figure 3.6.4: Firmware Information Window

3.6.5 A browse window will open to the firmware directory under the path you

selected when installing the GUI program (See Fig. 3.6.5). Navigate to where you saved your
firmware file, Select the firmware version you wish to install and click ‘ O.K’.

Figure 3.6.5: Firmware - Browse Window

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3.6.6 The selected file will be installed in the attenuator; the process will take up to a

minute.

Figure 3.6.6: Firmware - Progress Bar Window

Attempting to start a second GUI session while the firmware is being updated may cause
the firmware to be corrupted. It is therefore recommended not to attempt to start any
additional GUI sessions until after the firmware upgrade has been completed.

3.6.7 After the firmware has updated an alert will appear. Click ‘OK’ to shut down the

Programmable Attenuator program and then restart it normally.

Figure 3.6.7: Firmware - Successful Update

CAUTION

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4 Chapter 4 – Revision History

March 12, 2015: Created user guide Rev OR.
June 26, 2015: Updated user guide per CD Rev. C2 and Firmware Rev. B1, adding hig h s peed

Sweep & Hop, showed firmware upgrade support for RUDAT models. Rev A.

August 10, 2015: Rewrote Sweep & Hop section to add more detail to high speed mode and a dded

section on attenuation switching time with plots showing examples. Rev B.

September 16, 2015: Added caution note concerning multiple GUI sessions during firmware

upgrade.

October 16, 2015: Added models RCDAT-8000-30 and RCD A T-3000-63W2.
August 07, 2016: Added RC4DAT models and RUDAT-132G-90, Added SPI control, Added mu lti-

channel attenuators to sweep & hop, added third timing diagram, rewrot e firmware
upgrade to provide contact infor mation for firmware upgrades.

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