RF Multiplexer 8ch 1GHz
Project Description
This is a PCB-design + Arduino firmware for an Ethernet-controlled 1:8
RF-multiplexer. It allows selecting as output one of eight
input-channels, as commonly used e.g. in timing-laboratories when one
wants to measure many RF-sources (clock outputs like 1PPS or 10MHz) with
a single instrument (frequency or time-interval counter). The design is
for two independent MUX-boards to fit in a 1U 19” rack enclosure and may
fit in the OHWR “rackable 19” projects” category.
Two prototypes have been produced, with the second PCB-design
provisionally meeting the design goal for
bandwidth/insertion-loss.
Main Features
- 8 inputs, 1 output. Nominally 50 Ohm characteristic impedance.
- Bandwidth >1 GHz
- TE HF3 signal realy with lifetime of 1e7 operations (19 years at a rate of one operation per minute)
- Arduino Duo + Ethernet Shield controller
- 10/100 Mbit/s Ethernet
Components and datasheets
- TE HF3 Relay
- MCP23S17 16-Bit SPI I/O Expander with Serial Interface
- ULN2803A Darlington Transistor Array
Similar projects
- TAPR TASS DC-150 MHz
- 6x2 Coaxial Remote Antenna Switch
Contacts
Design and general questions
- Anders Wallin (anders.e.e.wallin "at" gmail.com)
Commerical producers
Status
Date | Event |
2018-02-15 | First PCB revision http://www.anderswallin.net/2018/02/rf-multiplexer-first-try/ |
2018-04-25 | Second PCB revision http://www.anderswallin.net/2018/04/rf-multiplexer-version-2/ |
2018-06-12 | OHWR-page rf-mux-8ch created |