High performance 8-channel Pulse and Frequency distribution amplifier
Project Description
This 1U 19" rack project houses two boards, one 8-channel logic-pulse distribution amplifier (pda) board (i.e., for 1 pulse-per-second signals) and one 8-channel frequency distribution amplifier (fda) for typically 5 or 10 MHz sine-wave signals. DC power to the boards is supplied through an IEC-connector on the back panel via two +9 V SMPS bricks.
Main Features
Frequency-Distribution-Amplifier
- latest release "FDA 2017.03"
- 2-sided PCB, 170 mm x 70 mm
- Input stage LMH6702
- Output stages LMH6609
- +6V and -6V low-noise DC rails provided by LT1963A and LT3015 low-noise regulators.
- ToDo: level detector? (logic-pin or LED to indicate presence of signal)
- ToDo: LED indicator for input signal
- ToDo: monitoring interface? (arduino or similar, Ethernet?)
- ToDo: multiple inputs?
Pulse-Distribution-Amplifier
- latest release "PDA 2017.04"
- 2-sided PCB, 170 mm x 70 mm
- +3V3 rail from LT1963A
- Input to LT1711 comparator
- 1.0V trigger level, from LT1790 voltage reference
- fan-out and outputs from IDT5PB1108
- LTC6993 timer drives 200ms "BLINK" pulse to front panel LED
Enclosure
- Two boards fit side-by-side an a 1U high 19" rack enclosure.
- 16 mm connector-to connector, either SMA or BNC
- 150 mm deep enclosure (can be reduced, depending on powersupplies)
- two front panel indicator LEDs per board
- AC connector on back panel
Project information
- Frequency-Distribution-Amplifier
- Pulse-Distribution-Amplifier
- Enclosure
- Similar-Projects
- Anders Wallin's blog on Electronics
Contacts
- Anders Wallin (anders.e.e.wallin "at" gmail.com)
Status
Date | Event |
01-2015 | First ideas for making the distribution amplifiers |
18-12-2015 | First tests on Pulse distribution amplifier prototypes |
27-12-2015 | Frequency Distribution Amplifier, v2 simulations made |
30-01-2017 | Frequency Distribution Amplifier measurements made |
12-08-2017 | Project started on ohwr |
18-08-2017 | 5 prototypes built. S/N 005 tested |
29-08-2017 | Metsähovi connected to the official time of Finland with the distribution amplifier |
21-10-2017 | Design files published on ohwr.org |
03-01-2018 | Enclosure Design notes and CAD files published |
07-02-2018 | Draft datasheet |