Pickering 4 878 Series User manual

pickeringtest.com Issue 1.5, June 2023
PXI/PXIe 50Ω 4-Channel RF MEMS Multiplexer
4x-878 User Manual

Page (ii)
© Copyright (2023) Pickering Interfaces. All Rights Reserved.
No part of this publication may be reproduced, transmitted, transcribed, translated or stored in any form, or by any
means without the written permission of Pickering Interfaces.
Technical details contained within this publication are subject to change without notice.
FM38792

Page (iii)
Worldwide Technical Support and Product Information
Pickering Interfaces Headquarters
Stephenson Road, Clacton-on-Sea, CO15 4NL United Kingdom
Tel: [phone]
e-mail: [email protected]
USA
Tel: (West) [phone]
Tel: (East) [phone]
e-mail: [e-mail]
France
Tel [phone]
e-mail: [email protected]
Germany
Tel: [phone]
e-mail: [email protected]
Sweden
Tel: [phone]
e-mail: [email protected]
Czech Republic
Tel: [phone]
e-mail: [email protected]
China
Tel: [phone]
e-mail: [email protected]
Technical Support
For Technical Support please contact Pickering Interfaces either by phone, the website or via e-mail.
Warranty
All products manufactured by Pickering Interfaces are warranted against defective materials and workmanship for a period
of three years, excluding programmable power supplies, from the date of delivery to the original purchaser. Any product
found to be defective within this period will, at the discretion of Pickering Interfaces be repaired or replaced.
Products serviced and repaired outside of the warranty period are warranted for ninety days.
Extended warranty and service are available. Please contact Pickering Interfaces by phone, the website or via e-mail.
Environmental Policy
Pickering Interfaces operates under an environmental management system similar to ISO 14001.
Pickering Interfaces strives to fulfil all relevant environmental laws and regulations and reduce wastes and releases to the
environment. Pickering Interfaces aims to design and operate products in a way that protects the environment and the health
and safety of its employees, customers and the public. Pickering Interfaces endeavours to develop and manufacture products
that can be produced, distributed, used and recycled, or disposed of, in a safe and environmentally friendly manner.

Page (iv)
Meaning/Description Symbol
PROTECTIVE EARTH (GROUND)
To identify any terminal which is intended for connection to an
external conductor for protection against electric shock in case of a
fault, or the terminal of a protective earth (ground) electrode.
DANGEROUS VOLTAGE
To indicate hazards arising from dangerous voltages.
WARNING/CAUTION
An appropriate safety instruction should be followed or caution to a
potential hazard exists.
Refer to the relevant instructions detailed within the product
manual.
HEAVY
If this product is heavy reference should be made to the safety
instructions for provisions of lifting and moving.
STATIC SENSITIVE
To indicate that static sensitive devices are present and handling
precautions should be followed.
!
kg
Safety Symbols
The following safety symbols may be used on the product and throughout the product documentation.
Product Safety

Page (v)
Contents
Copyright Statement........................................................................................................................................................(ii)
Technical Support and Warranty...................................................................................................................................(iii)
Product Safety...................................................................................................................................................................(iv)
Contents (this page).........................................................................................................................................................(v)
Warnings and Cautions...................................................................................................................................................(vi)
Section 1
Technical Specification....................................................................................................................................................1.1
Section 2
Technical Description ......................................................................................................................................................2.1
Functional Description...............................................................................................................................................2.1
Section 3
Installation.........................................................................................................................................................................3.1
Pre Operation Checks ................................................................................................................................................3.1
Hardware Installation................................................................................................................................................3.2
Software Installation..................................................................................................................................................3.2
Testing Operation........................................................................................................................................................3.3
Section 4
Programming Guide.........................................................................................................................................................4.1
Programming Options for Pickering PXI/PXIe Modules......................................................................................4.1
Module Architecture...................................................................................................................................................4.2
Operating & Using MEMS Switching.......................................................................................................................4.2
Programming the Module.........................................................................................................................................4.4
Using Pickering Drivers in LabVIEW.......................................................................................................................4.5
Section 5
Connector Information .....................................................................................................................................................5.1
Section 6
Trouble Shooting..............................................................................................................................................................6.1
Section 7
Maintenance Information................................................................................................................................................7.1

Page (vi)
WARNING - Hazardous Environments Symbol
This product is not specifically designed for use in hazardous environments, for example in explosive
atmospheres. If the product is to be used in hazardous environments we recommend that the user ensures
suitable protective measures are taken.
!
CAUTION - Handling of Electrostatic-Sensitive Devices Symbol
Certain semiconductor devices used in this equipment are liable to damage due to static voltage. Observe the
following precautions when handling these devices in their unterminated state, or sub-assemblies containing
these devices:
• Persons removing sub-assemblies from equipment using these devices must be earthed by a wrist strap
and a resistor at the point provided on the equipment.
• Soldering irons used during the repair operations must be low voltage types with earthed tips and isolated
from the mains voltage by a double insulated transformer.
• Outer clothing worn must be unable to generate static charges.
• Printed Circuit Boards (PCBs) fitted with these devices must be stored and transported in anti-static bags.
Warnings & Cautions
WARNING - Danger of Electric Shock Symbol
This module may contain hazardous voltages. Before removing the module from the rack remove all supplies
and disconnect user I/O signals.
Unused slots in the PXI/PXIe/LXI chassis are populated with blanking plates to prevent access to user I/O
signals that may be present. Blanking panels are available to order from Pickering in a variety of slot widths.
If the product is not used in this manner for example by using an extender card then additional care must be
taken to avoid contact with exposed signals.
CAUTION - Product Documentation Symbol
Suitably qualified & trained users should ensure that the accompanying documentation is fully read and
understood before attempting to install or operate the product.
!
Safety Instructions
Safety Instructions
All cleaning and servicing requires the equipment to be isolated and disconnected from the power source and user I/O signals
(refer to the Maintenance Section).
• Appropriate manual handling procedures should be followed as dictated by the weight of the individual module or the
combined weight of the modules & chassis.
• Should a fault occur with the module or chassis, immediately isolate and disconnect the incoming power to the chassis and
the user I/O signals.
• Ensure the equipment is installed, operated and maintained by trained and authorised personnel.
• For suitably equipped products in the event of an emergency press the red “emergency stop” button situated on the front of
the unit.

Page 1.1 pickeringtest.com
Section 1 - Technical Specification
yAvailable as PXI or PXIe Modules
y4 GHz RF Multiplexer
yMaximum RF Power to 25 W
ySingle, Dual and Quad Versions
ySMB or MCX Connector Versions
yVery Low Insertion Loss
yLong Operational Life
yFast Operating Time
yDrivers Supplied for Windows and
Linux, Plus Support for Real-time
Systems
yPXI Versions Supported by
PXI or LXI Chassis
yBased on Menlo Micro Ideal Switch®
MEMS Devices
y3 Year Warranty
3
4
C1
1
2
Bank 1
3
4
C2
1
2
Bank 2
3
4
C3
1
2
Bank 3
3
4
C4
1
2
Bank 4
Quad 4 to 1 RF MUX (Part No. 4x-878-24x)
- Default Switch State Shown
The 40-878 (PXI) and 42-878 (PXIe) are 50 Ω 4 to 1 RF
Multiplexers available with 1, 2 or 4 banks in a single PXI or
PXIe slot.
The module is based on the latest micro-electromechanical
system (MEMS) switching technology from Menlo Micro and
has low insertion loss and VSWR. In addition, MEMS devices
have a long operational life of >3 billion operations and benefit
from an operating time of 50 µs allowing greater test system
throughput. The multiplexers have excellent and repeatable
RF characteristics beyond 4 GHz with each path having a
nominally equal insertion loss. The 4x-878 minimizes the
injection of noise and unwanted signals into the signal path by
careful attention to the mechanical and electrical design.
Versions with MCX or SMB connectors are available, allowing
users to simplify cabling issues by matching them to other
connectors in their test system.
The 4x-878 is supplied with drivers that allow support in all
popular software environments. It can also be supported in all
Pickering’s LXI Modular Switching chassis, allowing the use of
a PXI or LAN controlled switching solution with the same high
levels of performance.
pickeringtest.com
4x-878
PXI/PXIe 50 Ω 4-Channel RF MEMS Multiplexers
Issue 1.4 June 2023

Page 1.2 pickeringtest.com
Section 1 - Technical Specification
4x-878 RF Performance Plots
(Plots taken from typical sample showing all connecting paths for parameter)
Typical Insertion Loss Plot For Each Signal Path Typical VSWR Plot For Each Signal Path (Load on COM)
Typical Crosstalk Plot Between Signal Paths
(Unswitched, Load on COM)
Typical VSWR Plot For Each Signal Path (Load on Channel)
Typical Crosstalk Plot Between Signal Paths (Unloaded)
Typical Isolation Plots for Each Channel
4x-878
pickeringtest.com Page 2
Specifications

Page 1.3 pickeringtest.com
Section 1 - Technical Specification
RF Specification
RF Frequency Range: DC to 4 GHz, usable to 5 GHz
Insertion Loss: Typically <0.7 dB to 1 GHz
Typically <1.4 dB to 4 GHz
VSWR: Typically <1.25:1 to 1 GHz
Typically <1.5:1 to 4 GHz
Isolation: Typically >40 dB to 1 GHz
Typically >30 dB to 4 GHz
Crosstalk: Typically <-60 dB to 1 GHz
Typically <-40 dB to 4 GHz
Maximum RF Power (CW): 2 W to 1 MHz
10 W to 10 MHz
25 W to 4 GHz
Other Switching Specifications
Maximum DC Voltage: 35 V *
Maximum DC Current: 0.5 A
Operating Time: 50 µs typical
Life Expectancy: 3 x 109 operations
* MEMS devices are intended for cold-switch applications
only.
PXI & CompactPCI Compliance - 40-878
The module is compliant with the PXI Specification 2.2.
Local Bus, Trigger Bus & Star Trigger are not implemented.
Uses a 33 MHz 32-bit backplane interface.
PXIe Compliance - 42-878
The module is compliant with the PXIe Specification 1.0.
Local Bus, Trigger Bus & Star Trigger are not implemented.
Safety & CE Compliance
All modules are fully CE compliant and meet applicable
EU directives:
Low-voltage safety EN61010-1:2010,
EMC Immunity EN61326-1:2013,
Emissions EN55011:2009+A1:2010.
Mechanical Characteristics
40-878 - Single slot 3U PXI (CompactPCI card).
42-878 - Single slot 3U PXIe, compatible with PXIe hybrid slot.
3D models for all versions in a variety of popular file formats
are available on request.
Module weight: 206 g (40-878-242)
Connectors
40-878 - PXI bus via 32-bit P1/J1 backplane connector.
42-878 - PXIe bus via XJ3 and XJ4 backplane connectors.
Signals via front panel SMB or MCX connectors.
Power Requirements - 40-878
+3.3 V +5 V +12 V -12 V
200 mA 100 mA 0 0
Power Requirements - 42-878
+3.3 V +12 V
200 mA 50 mA Operating/Storage Conditions
Operating Temperature:
Humidity:
Altitude:
0 °C to +55 °C
Up to 90 % non-condensing
5000 m
Storage Temperature:
Humidity:
Altitude:
-20 °C to +75 °C
Up to 90 % non-condensing
15000 m
4x-878
pickeringtest.com Page 3
Specifications

Page 1.4 pickeringtest.com
Section 1 - Technical Specification
Connection Accessories
For a complete list of connection accessories and
documentation for the 4x-878 module, please refer to our
RF connectors datasheet (90-011D).
Product Order Codes
Single MEMS 50 Ω 4:1 RF MUX, SMB
Dual MEMS 50 Ω 4:1 RF MUX, SMB
Quad MEMS 50 Ω 4:1 RF MUX, SMB
4x-878-211
4x-878-221
4x-878-241
Single MEMS 50 Ω 4:1 RF MUX, MCX
Dual MEMS 50 Ω 4:1 RF MUX, MCX
Quad MEMS 50 Ω 4:1 RF MUX, MCX
4x-878-212
4x-878-222
4x-878-242
Where 4x specifies PXI or PXIe, for example:
40-878-211 Single MEMS 50Ω 4:1 RF Multiplexer, SMB
connectors in PXI format
42-878-211 Single MEMS 50Ω 4:1 RF Multiplexer, SMB
connectors in PXIe format
Product Customization
Pickering modules are designed and manufactured on our
own flexible manufacturing lines, giving complete product
control and enabling simple customization to meet very
specific requirements.
All customized products are given a unique part number, fully
documented and may be ordered at any time in the future.
Please contact your local sales office to discuss.
42-878-241 PXIe Quad 50 Ω 4:1 RF Multiplexer
4x-878
pickeringtest.com Page 5
Ordering Information

Page 2.1 pickeringtest.com
Section 2 - Technical Description
Functional Description
A functional block diagram is provided in Figure 2.1. The module is powered by +5 V and +3.3 V (PXI) or +3.3 V and +12 V
(PXIe) supplies via PCI Bus connectors mounted on the mother board. The interface to the user test equipment is via the
front panel mounted SMB or MCX connectors. The module comprises a mother board with the PXI/PXIe interface circuit
and daughter boards populated with SPST MEMS relays. Single and dual multiplexers have one daughter board, quad
multiplexers have two daughter boards.The MEMS relays are configured as 4-channel RF multiplexers and are energised
via control signals from relay driver devices. The relay drivers receive control data from PCI bridge U1 mounted on the
mother board via a PCB/PCB interconnection. Module configuration and setup information for the PCI bridge is stored in
Serial EPROM devices.
Figure 2.1 - 4-Channel RF MEMS Multiplexer Module 4x-878: Functional Block Diagram
Memory
U9-10
Level
Shifters
U2-3
(40-878)
PCI Bridge U1
Mother Board
Configuration
Memories
U7-8
PXI/PXIe 4-Channel RF MEMS Multiplexer 4x-878
Daughter Board
PCB Interconnection
SMB or MCX Connectors
Relay
Drivers
Relay
Drivers
SMB or MCX Connectors
Daughter Board
2x 4-Channel
RF Multiplexer
GND
+5V
+3.3V
GND
+12V
+3.3V
Compact PCI Bus
Connector J1 (40-878)
PXIe Connectors
XJ3 & XJ4 (42-878)
Lorem ipsum
2x 4-Channel
RF Multiplexer

Page 3.1 pickeringtest.com
Section 3 - Installation
kg
Pre-operation Checks (Unpacking)
1. Check the module for transport damage and report any damage immediately to Pickering Interfaces.
Do not attempt to install the product if any damage is evident.
2. Position the chassis relative to any other equipment the module(s) will connect with. Ensure the chassis is not
connected to the electrical supply.
3. Ensure that the designated area for the chassis containing the module is of flat and solid construction to withstand
and support the combined weight of the module(s) and chassis.
!
Refer to the Warnings and Cautions at the front of this manual
Modular products require installation in a suitable PXI/PXIe/LXI chassis. The module is designed for indoor use only.
Figure 3.1 - Installing the Module into a PXI/PXIe/cPCI/LXI Chassis
PXI/PXIe/LXI Chassis
PXI/PXIe Module
Injector/Ejector Handle
Injector/Ejector Rail

Page 3.2 pickeringtest.com
Section 3 - Installation
Software Installation
First install the appropriate Pickering PXI switch card drivers by running the installer program Setup.exe (provided in a compressed zip
file), either from the CD-ROM supplied, or by downloading the latest version from our website: pickeringtest.com - the recommended
method. Setup is accompanied by a ReadMe file containing additional installation information. A single installation covers all Pickering
switching and simulation PCI, PXI and PXIe products.
When installation completes, the installed drivers’ ReadMe file is offered for display. It can also be displayed later using a shortcut on
the Programs>>Pickering menu.
If you are not a LabVIEW user you should choose the “full” version, and once that has been installed run the LabVIEW Runtime Engine
installer via the shortcut on the Programs>>Pickering menu. In the absence of LabVIEW the Runtime Engine is required to support the
Pickering Test Panels application.
!
Hardware Installation Electrical Connection (Chassis)
The chassis must be electrically installed in accordance with local regional electrical codes by a qualified engineer.
The chassis must be grounded.
Electrostatic discharge can damage the components on the module. To avoid such damage in handling the board refer to page vi.
Ensure that there is adequate ventilation.
The module should be installed in accordance with the following procedure:
1. Ensure that the system is turned OFF but still connected to mains so that it remains grounded.
2. Choose an appropriate slot in the rack.
3. Remove the blanking plate for the chosen slot.
4. Ensure that the injector/ejector handle is in its downward position. Align the module with the card guides on the top and bottom of
the slot.
Do not raise the injector/ejector handle whilst inserting the module as the module will not insert properly.
5. Hold the handle whilst slowly sliding the module into the card guides until the handle catches on the injector/ejector rail (refer to
Figure 3.1).
6. Raise the injector/ejector handle until the module firmly seats into the backplane. The front panel of the module should be flush with
the front panel of the chassis.
7. Secure the front panel of the module using both screws to the chassis front panel mounting rails.
8. In a system employing a remote control interface to connect an external controller to a PXI chassis or to link multiple chassis,
power-up the system as follows:
a. For a system comprising an external controller and one chassis, power up the chassis before powering up the external controller.
b. For a system comprising more than one chassis, turn ON the last chassis in the system followed by the penultimate, etc, and
finally turn ON the external controller or chassis containing the system controller.
9. For Pickering Interfaces modular LXI installation there is no requirement to use any particular power up sequence.

Page 3.3 pickeringtest.com
Section 3 - Installation
Figure 3.3 - General Soft Front Panel Selector
Testing Operation
After installation of the hardware and Pickering PXI Driver software package start the General Soft Front Panel (GSFP) using the
desktop icon or via the Start menu (Start Menu-> Pickering Interfaces Ltd -> General Soft Front Panel).
A selector panel will appear, listing all installed Pickering PCI, PXI/PXIe or LXI switch cards and resistor cards. Click on the card you
wish to control, and a graphical control panel is presented allowing operation of the card. Panels can be opened simultaneously for
all the installed cards.
More details how to use the GSFP can be found in the manual, via menu Help\Manual.
Figure 3.2 - General Soft Front Panel Icon

Page 4.1 pickeringtest.com
Section 4 - Programming
Programming options for Pickering Interfaces PXI/PXIe Modules
For information on the installation and use of drivers and the programming of Pickering’s products in various software
environments, please refer to the Software User Manual.
This is available as a download from:
pickeringtest.com/support/software-drivers-and-downloads
Also, it can be accessed from the DVD supplied with the product:
<DVD_DRIVE>\downloads\Documentation\Software-Manual.pdf

Page 4.2 pickeringtest.com
Section 4 - Programming
Module Architecture
Figure 4.1 - Switching Diagrams for 4x-878 4-Channel MEMS RF Multiplexer
(default switch state shown)
The 4x-878 module is an 4-channel RF multiplexer based on MEMS switching technology and is available with one, two or
four independent banks. The multiplexers have a default state with all signal paths open. The software includes blocking
that allows only one out of the four signal paths to be enabled on each bank at any one time. The module’s switching
architecture is shown in the diagrams below.
Signal paths are created by enabling the bits in the appropriate sub-unit as shown in Table 4.1. Page 4.4 shows some
simple programming examples.
3
4
C
1
2
3
4
C1
1
2
Bank 1
3
4
C2
1
2
Bank 2
3
4
C1
1
2
Bank 1
3
4
C2
1
2
Bank 2
3
4
C3
1
2
Bank 3
3
4
C4
1
2
Bank 4
4x-878-21x 4x-878-22x 4x-878-24x
Operating & Using MEMS Switching
MEMS devices are sensitive to static and hot-switching. The module has been carefully designed to be able to withstand
lower level ESD events up to 1 kV but standard ESD practice should always be used when handling the module.
Hot-switching is not recommended when using this module to switch RF signals, the RF power to the module should be
turned off before a path is switched. The devices are capable of hot-switching up to 0.5Vp (RF 2.5 mW or 4 dBm in a 50 Ω
system) but great care should be taken to ensure the limit is not exceeded.

Page 4.3 pickeringtest.com
Section 4 - Programming
Programming Bit / Signal Path Table
Applicable
Modules
Multiplexer
Bank Sub-Unit Bit Signal Path IVI Channel Names (multi-bank versions)
IVI Channel Names
(single bank versions)
4x-878-21x
4x-878-22x
4x-878-24x
1 1
1 C1 to 1 comA chA1 com ch1
2 C1 to 2 comA chA2 com ch2
3 C1 to 3 comA chA3 com ch3
4 C1 to 4 comA chA4 com ch4
4x-878-22x
4x-878-24x 2 2
1 C2 to 1 comB chB1 ‒ ‒
2 C2 to 2 comB chB2 ‒ ‒
3 C2 to 3 comB chB3 ‒ ‒
4 C2 to 4 comB chB4 ‒ ‒
4x-878-24x 3 3
1 C3 to 1 comC chC1 ‒ ‒
2 C3 to 2 comC chC2 ‒ ‒
3 C3 to 3 comC chC3 ‒ ‒
4 C3 to 4 comC chC4 ‒ ‒
4x-878-24x 4 4
1 C4 to 1 comD chD1 ‒ ‒
2 C4 to 2 comD chD2 ‒ ‒
3 C4 to 3 comD chD3 ‒ ‒
4 C4 to 4 comD chD4 ‒ ‒
Table 4.1 - Sub-unit / Bit allocations for the 4x-878 4-Channel MEMS RF Multiplexer

Page 4.4 pickeringtest.com
Section 4 - Programming
Programming the Module
This section provides some code fragments which show how to control the 4x-878 multiplexer using either the Direct I/O
Driver or the VISA Driver.
Once the drivers are installed the manual “Sys40Prg.pdf” and driver help files which fully describes these functions can be
found in the Pickering folder(s) or the Pickering entries on your Start Menu.
The card must be opened before use and closed after using the following function calls:
Direct Driver - Open with PIL_OpenCards or PIL_OpenSpeciedCard and close with PIL_CloseCards or
PIL_CloseSpeciedCards respectively.
VISA Driver - Open with pipx40_init, and close with, pipx40_close.
Using the Pickering Direct I/O driver:
DWORD sub_unit = 1; // Select Bank 1
PIL_OpBit( card_num, sub_unit, 1, 1); // Enable the C1 to 1 signal path
PIL_OpBit( card_num, sub_unit, 2, 1); // Release the C1 to 1 signal path and
// enable the C1 to 2 signal path
PIL_OpBit( card_num, sub_unit, 2, 0); // Release the C1 to 2 signal path and set
// the multiplexer to the default position
Using the VISA driver:
ViUInt32 sub_unit = 1; // Select Bank 1
pipx40_setChannelState(vi, sub_unit, 1, VI_ON); // Enable the C1 to 1 signal path
pipx40_setChannelState(vi, sub_unit, 2, VI_ON); // Release the C1 to 1 signal path and
// enable the C to 2 signal path
pipx40_setChannelState(vi, sub_unit, 2, VI_OFF); // Release the C1 to 2 signal path and
// set the multiplexer to default
Using the IVI driver:
The IVI driver has no special labelling for this card and treats the array of switches as a simple array, labelling the channels
using the normal com./ch labelling tags (banks are labelled in sequence, 1 is A, 2 is B, 3 is Cand Dis 4. The following
example assumes a two or four bank multiplexer, for single bank versions, the common is referred to as com, and the
channels as ch1, ch2, etc.
pi40iv_Connect(vi, comA, chA1); // Enable the C to 1 signal path of bank 1
pi40iv_Disconnect(vi, comA, chA1); // Release the C to 1 signal path of bank 1
pi40iv_Connect(vi, comA, chA2); // Enable the C to 2 signal path of bank 1
pi40iv_Disconnect(vi, comA, chA2); // Release the C to 2 signal path and sets
// multiplexer bank 1 to the default position

Page 4.5 pickeringtest.com
Section 4 - Programming
Using Pickering Drivers In LabVIEW
Example Use of Pickering Drivers in LabVIEW
To download LabVIEW examples, please go to:
http://wiki.pickeringtest.net/Using+Pickering+Drivers+in+LabView
Most Pickering drivers include a LabVIEW wrapper to permit full operation of the Pickering product from the LabVIEW
environment. These wrappers are normally installed to the current LabVIEW folder system during installation of the
Pickering driver.
The process of controlling a Pickering product normally consists of the following steps:
1. Open a control session on the product.
2. Use functions in the library to operate the product.
3. Close the control session.
Following is a simple example of the use of the most common Pickering drivers:

Page 5.1 pickeringtest.com
Section 5 - Connectors
Figure 5.1 - Single 4-Channel MEMS Multiplexer Module 4x-878-21x:
SMB/MCX Connector Positions
pickering
1
2
3
4
C
pickering
4
3
1
2
3
2
4
1
C1
C2
pickering
4
3
1
2
3
2
4
1
C1
C2
4
3
1
2
3
2
4
1
C3
C4
3
4
C1
1
2
Bank 1
3
4
C2
1
2
Bank 2
3
4
C3
1
2
Bank 3
3
4
C4
1
2
Bank 4
3
4
C1
1
2
Bank 1
3
4
C2
1
2
Bank 2
3
4
C
1
2
Single 4-Channel
RF Multiplexer