Minitiouner Hardware
The MiniTiouner, developed and designed by Jean-Pierre F6DZP, is a DVB-S/S2 USB receiver card and measurement tool that works with the software "Minitioune".
Original schematics are here : http://www.vivadatv.org/viewtopic.php?f=80&t=366
BATC PCB
Brian G4EWJ has designed a PCB for the BATC to enable easy home construction of the MiniTiouner hardware - components for over 200 units have been sold around the world.
All the project documentation is available for download in the zip file:
File:MTK1 Instructions v1-9, Parts v5, Overlay, Schematic v1.zip
Colin G4KLB has done an excellent video on constructing the MiniTiouner: https://www.youtube.com/watch?v=vXUIQPeslwM
When you have built your MiniTiouner, you can check it using the software "TestMyMiniTiouner" included in the Minitioune software package.
Compatible NIM types
Only NIMs ( Network Interface Module) or tuners that have the following STMicroelectronics chips can be used:
- Zero tuner chip can be STB6100, STV6110, STV6111, STV6120
- Demodulator chip STV0903, STV0913, STV0910
The following NIMs can be used:
- Eardatek EDS-4B47FF1B+ (sold by BATC shop during 2015 / 16)
- Sharp F7VZ0169 (sold by BATC shop during 2016)
- Samsung DNBU10711IST
- Samsung DNBU10512IST
- LG TDQX-S001F
- Serit SP2246
- Serit FTS-4335 (Sold by BATC shop in 2017)
Note - the NIM Serit FTS-4335 has a different pins configuration (40pins, not 26 pins) , so an adapter for "old pcbs" has been designed by Brian G4EWJ
Fitting a lock detector
When Minitiouner is used at repeater site a lock detector is required to tell the repeater logic when a signal is being received. Several designs based around the NE567 have been used but the simplest and most reliable is from Robin, G8DRK.
The 22kHz from the tuner is coming from a 3.3V port which is normally zero volts. When it outputs the 22kHz tone it does it by pulsing up to +3.3 volts with a 50% duty cycle. So we can simply smooth that and get about 1.6 volts - more than enough to turn a transistor on.
This circuit should drive most small 12 volt "signal" relays. If relay needs more than 90mA consider using a smaller one or try a beefier transistor but with a gain of at least 100.
This following circuit provides a 5-volt TTL output when the 22 kHz tone is present:
In both circuits the green LED functions as a Lock-LED, as long as you set "22kHz_switch=2" in the MiniTioune.ini file.