Mini-Circuits RC8DAT-8G-95 User manual

AN-49-011 © 2023 Mini-Circuits
Rev. D | ECO-016581 | 25-Jan-2023Page 1
User Guide
Multi-Channel Programmable
Attenuators

AN-49-011 © 2023 Mini-Circuits
Rev. D | ECO-016581 | 25-Jan-2023Page 2
Table of Contents
1 - General Information .....................................................................................................4
1.1. User-Guide Scope.................................................................................................................................................................... 4
1.2. Support Contacts..................................................................................................................................................................... 4
1.3. Warranty & RMA Returns ....................................................................................................................................................... 4
1.4. End of Life................................................................................................................................................................................ 4
1.5. Definitions ............................................................................................................................................................................... 4
2 - About Mini-Circuits Programmable Attenuators...........................................................5
2.1. Introduction ............................................................................................................................................................................ 5
2.2. Key Features............................................................................................................................................................................ 5
2.3. Intended Applications ............................................................................................................................................................. 5
2.4. Model Selection Guide ............................................................................................................................................................ 6
2.5. Environmental Specifications.................................................................................................................................................. 6
2.6. Supported Software Environments......................................................................................................................................... 7
2.7. Conformity .............................................................................................................................................................................. 7
2.8. Accessories and Options ......................................................................................................................................................... 8
2.9. Service and Calibration............................................................................................................................................................ 8
2.10. Safety & Precautions ............................................................................................................................................................. 8
2.11. Functional Block Diagram...................................................................................................................................................... 9
3 - Software Setup ...........................................................................................................10
3.1. System Requirements ........................................................................................................................................................... 10
3.2. Software Downloads & Resources ........................................................................................................................................ 10
3.3. Software Installation ............................................................................................................................................................. 10
4 - Hardware Setup..........................................................................................................12
4.1. USB Control ........................................................................................................................................................................... 12
4.2. Ethernet Control.................................................................................................................................................................... 12
4.3. Daisy-Chain Control............................................................................................................................................................... 13
4.3.1. Setup Instructions ......................................................................................................................................................... 14

AN-49-011 © 2023 Mini-Circuits
Rev. D | ECO-016581 | 25-Jan-2023Page 3
Table of Contents (continued)
5 - Using Mini-Circuits’ GUI .............................................................................................. 15
5.1. Getting Started...................................................................................................................................................................... 15
5.1.1. USB Control ................................................................................................................................................................... 16
5.1.2. Ethernet Control............................................................................................................................................................ 17
5.2. Operating the Attenuator ..................................................................................................................................................... 19
5.2.1. General Functions.......................................................................................................................................................... 20
5.2.2. Manual Mode Functions................................................................................................................................................ 20
5.2.3. Automatic Mode Functions ........................................................................................................................................... 20
5.2.4. Hop Mode Functions ..................................................................................................................................................... 21
5.2.5. Sweep Mode Functions ................................................................................................................................................. 21
5.2.6. Log Attenuation............................................................................................................................................................. 22
5.2.7. Configuration Settings ................................................................................................................................................... 23
5.3. Ethernet Configuration ......................................................................................................................................................... 24
5.3.1. Default IP Configuration ................................................................................................................................................ 24
5.3.2. Default Static / “Link-Local” IP Address......................................................................................................................... 24
5.3.3. Recovery of IP Configuration via USB............................................................................................................................ 24
5.3.4. Default Factory Setting.................................................................................................................................................. 24
5.3.5. Ethernet Settings Screen ............................................................................................................................................... 25
5.3.6. Ethernet Configuration Tool.......................................................................................................................................... 27
5.4. Operation Modes .................................................................................................................................................................. 28
5.4.1. Sweep Mode.................................................................................................................................................................. 28
5.4.2. Hop Mode...................................................................................................................................................................... 28
5.4.3. PC Control Mode ........................................................................................................................................................... 28
5.4.4. High-Speed Mode.......................................................................................................................................................... 28
5.4.5. Attenuator Switching Time............................................................................................................................................ 29
5.5. Daisy-Chain Control with Dynamic Addressing ..................................................................................................................... 30
5.5.1. Master/Slave Connection with USB Control.................................................................................................................. 30
5.5.2. Dynamic Addressing Functions...................................................................................................................................... 31
5.6. Pop-up Alerts......................................................................................................................................................................... 32
5.7. Firmware Update .................................................................................................................................................................. 33
5.7.1. Requirements ................................................................................................................................................................ 33
5.7.2. Process .......................................................................................................................................................................... 33
5.8. Firmware Recovery ............................................................................................................................................................... 35
5.8.1. Recovery Steps (Current Controller) ............................................................................................................................. 35
5.8.2. Recovery Steps (Legacy Controller) ............................................................................................................................... 36
6 - Revision History.......................................................................................................... 37
7 - Contact Information ...................................................................................................38

AN-49-011 © 2023 Mini-Circuits
Rev. D | ECO-016581 | 25-Jan-2023Page 4
1 -General Information
1.1. User-Guide Scope
This user guide provides general introduction, installation instructions and operating information for Mini-Circuits’ USB &
Ethernet multi-channel programmable attenuators: RC4DAT and RC8DAT series.
For information on Mini-Circuits’ single-channel programmable attenuators see:
•https://www.minicircuits.com/app/AN49-005.pdf
1.2. Support Contacts
We are here to support you every step of the way. For technical support and assistance, please contact us at the email address
below or refer to our website for your local support:
•[e-mail]
•https://www.minicircuits.com/contact/worldwide_tech_support.html
1.3. Warranty & RMA Returns
Mini-Circuits provides a limited time warranty with all products. Please contact your account manager or refer to our website for
full details: https://www.minicircuits.com/support/ordering.html
If you have any questions or concerns with your product, please contact us in the first instance through
[e-mail]. Our team will work with you promptly to understand and resolve any issues. As a software-
controlled instrument, it is usually possible to resolve issues remotely without requiring the unit to be returned to the factory.
In the event that a return to the factory is necessary, Mini-Circuits will provide an RMA number and full return instructions.
1.4. End of Life
Please contact [e-mail] to review environmentally friendly end of life disposal options.
1.5. 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.
Caution:
•A caution advises about a condition or procedure which can cause damage to the equipment.
•There is no danger to the user.
Warning:
•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.

AN-49-011 © 2023 Mini-Circuits
Rev. D | ECO-016581 | 25-Jan-2023Page 5
2 -About Mini-Circuits Programmable Attenuators
2.1. Introduction
Mini-Circuits has developed a series of multi-channel programmable attenuators, the RC4DAT and RC8DAT series, which can be
controlled via standard USB or Ethernet-TCP/IP (Telnet, HTTP, and SSH protocols). These programmable attenuators can operate
up to 8000 MHz with an attenuation resolution down to 0.05 dB, and attenuation range of up to 120 dB. 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, compact and can be
powered from the USB bus or external power supply, increasing system flexibility.
Using their Ethernet control the RC4DAT and RC8DAT models can be controlled from almost any computer, or even a smartphone
with a network connection from anywhere in the world.
Refer to section 2.4 for details of specific models.
2.2. Key Features
•Multiple independent attenuation channels
•Wide attenuation range (model dependent)
•Wide frequency range
•Fine attenuation resolution
•Multiple control options
•USB HID (Human Interface Device) for “plug & play” operation (no driver installation required)
•User-friendly graphical user interface (GUI) for Windows
•API DLL for Windows and direct USB programming support for Linux (see programming manual for details)
For additional details, performance data and graphs, outline drawing, ordering information and environmental specifications,
see our catalog at: https://www.minicircuits.com/WebStore/RF-Programmable-Step-Attenuators.html
2.3. Intended Applications
Mini-Circuits multi-channel programmable attenuators are intended for indoor use in:
•Lab and test equipment setups for both manual and automated measurements.
•Control systems.
•Production test equipment.
The attenuators can be used by anyone familiar with the basics of electronics measurements or electronic control systems.

AN-49-011 © 2023 Mini-Circuits
Rev. D | ECO-016581 | 25-Jan-2023Page 6
2.4. Model Selection Guide
Model name Num. of
Channels
Frequency
range (MHz)
Atten.
range (dB)
Attenuation
resolution (dB)
Max input
power (dBm)
Control protocols
RC8DAT-8G-95
8
1-8000
95
0.25
+28
USB, HTTP, Telnet, SSH
RC4DAT-8G-95
4
1-8000
95
0.25
+28
USB, HTTP, Telnet, SSH*
RC4DAT-8G-120H 4 200-8000 120 0.05 +23
USB, HTTP, Telnet, SSH,
Daisy-chain
RC4DAT-6G-95
4
1-6000
95
0.25
+23
USB, HTTP, Telnet, SSH*
RC4DAT-6G-60
4
1-6000
63
0.25
+23
USB, HTTP, Telnet, SSH*
RC4DAT-6G-30
4
1-6000
30
0.25
+23
USB, HTTP, Telnet, SSH*
For detailed model performance, data and graphs, outline drawing, ordering information and environmental specifications click
on the model part number.
For setup and control instructions for the different control protocols see chapter 4-.
* SSH support is a new addition, refer to table in section 5.8 for the serial number range which supports this feature.
2.5. Environmental Specifications
Mini-Circuits’ programmable attenuators are intended for operation in office, laboratory, or production test environments. Do
not use in any condition which exceeds the published environmental specifications.
Condition
Specification
Operating temperature
0°C to +50°C
Humidity
5% to 85% RH (non-condensing)
Altitude
Up to 2000 m (6560 ft.)
Pollution degree
2 - Normally only non-conductive pollution occurs (per IEC 61010)

AN-49-011 © 2023 Mini-Circuits
Rev. D | ECO-016581 | 25-Jan-2023Page 7
2.6. Supported Software Environments
Mini-Circuits programmable attenuators have been tested in the following operating systems:
•32-bit systems: Windows 7 or later.
•64-bit systems: Windows 7 or later (GUI & API); Linux.
Custom automation programs can be created in most modern programming environments, including Python, C#, LabVIEW,
MatLab and more.
Refer to the programming manual for more information on attenuator programming.
2.7. Conformity
Mini-Circuits’ programmable attenuators conform to the following international standards:
Standard
Meaning
CE
Meets the requirements of the following applicable European directives and carries the CE marking accordingly:
•Low Voltage – Directive 2014/35
•Electromagnetic Compatibility – Directive 2014/30/EU
•Restriction of the Use of certain Hazardous Substances in Electrical and Electronic Equipment (RoHS) –
Directive 2015/863
UKCA
Meets the requirements of the following applicable UK directives and carries the UKCA marking accordingly:
•Electrical Equipment (Safety) Regulations 2016
•Electromagnetic Compatibility Regulations 2016
•The Restriction of the Use of Certain Hazardous Substances in Ele
ctrical and Electronic Equipment
Regulations 2012
FCC
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part
15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in
a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular installation.
USB 2.0
The model meets the specifications of the Universal Serial Bus version 2.0 communication standard as described
by USB-IF.
USB HID The model meets the requirements for Universal Serial Bus Human Interface Devices according to USB-IF’s
Device Class Definition for Human Interface Devices firmware revision 1.11.
TCP/IP The model meets the Ethernet communication complies with the specifications of the Transmission Control
Protocol (TCP) and Internet Protocol (IP) as defined in RFC 791 and RFC 793.
HTTP The model supports all requirements for communicating with the Hypertext Transfer Protocol (HTTP) as defined
in RFC 1945
.
Telnet The model supports all requirements for communicating with the Telnet protocol, as defined in RFC 854.
SSH The models which specify SSH control, support the requirements for SSH protocol as defined by RFCs 4250-4253,
4419, 5647, 5656 and 6668.

AN-49-011 © 2023 Mini-Circuits
Rev. D | ECO-016581 | 25-Jan-2023Page 8
2.8. Accessories and Options
The programmable attenuators are supplied with a control cable:
•3.3 ft (1.0 m) USB cable: USB type A (Male) to USB type Mini-B (Male)
•3.3 ft (1.0 m) USB cable: USB type A (Male) to USB type C (Male) (model dependent)
The following optional accessories are available (see models’ datasheet for details):
•Ethernet cable: RJ45 (Male) to RJ45 (Male) Cat 5E cable
•USB extension cable: USB type A (Male) to USB type A (Female)
•Daisy-chain cable: Digital snap fit (Male-Male) cable assembly connectors (depending on model)
•AC/DC power adapter suitable for a wide selection of wall sockets
•Mounting bracket
•The full software package including GUI, API DLL files and programming instructions, can be downloaded from
https://www.minicircuits.com/softwaredownload/patt.html
2.9. Service and Calibration
The programmable attenuators do not require any periodic service or calibration.
The only user-performed service possible for attenuator modules is external cleaning of the case and connectors as needed. Do
not use any detergents or spray cleaning solutions. The case can be cleaned with a soft, slightly dampened cloth and the
connectors with an alcohol solution. Do not allow any liquid ingress into the case or connectors.
2.10. Safety & Precautions
Mini-Circuits’ programmable attenuators contain no user serviceable parts and should not be opened. Discontinue use and
contact Mini-Circuits in the event of visible damage to any parts.
Please observe the following safety precautions at all times when using Mini-Circuits’ attenuator modules:
Caution:
•Do not input to the device signals of greater power than the attenuator is rated for in its datasheet.
•Safe power input degrades below specified frequency range. Do not input signals below the specified frequency
range.
Warning:
•Properly ground all equipment to reduce the risk of accidental electrical shock.

AN-49-011 © 2023 Mini-Circuits
Rev. D | ECO-016581 | 25-Jan-2023Page 9
2.11. Functional Block Diagram
Figure 2.11a: RC4DAT-models’ functional block diagram
Figure 2.11b: RC8DAT-models’ functional block diagram

AN-49-011 © 2023 Mini-Circuits
Rev. D | ECO-016581 | 25-Jan-2023Page 10
3 -Software Setup
3.1. System Requirements
The minimum requirements for the installation of the Mini-Circuits multi-channel programmable attenuator software package
and API on the host PC are:
•Microsoft Windows 7 or later (32- or 64-bit).
•Intel i3 or equivalent (recommended).
When using the supplied power adaptor, a power source of 110-220VAC (with a socket matching one of the two pin plugs provided)
is also needed.
Control method
Required support
USB control
USB HID
Ethernet control
Network connection
3.2. Software Downloads & Resources
The full programmable attenuator software package (including GUI, API and documentation) is available for download from:
•https://www.minicircuits.com/softwaredownload/patt.html
3.3. Software Installation
•Save all work in progress and close any other programs that may be running.
•Download the programmable attenuator software from the Mini-Circuits website.
Extract the downloaded zip file and begin the installation process and double-click the Setup.exe icon.
•If Microsoft Defender SmartScreen provides a warning about an unrecognized app, select More Info and then Run Anyway.
•If prompted by Windows User Account Control, enter user credentials for an account allowing software installation.