Descrição
Integrated digital stereo signal generator, excellent audio, on-board RDS
The new STMAX 9000+ series FM exciters combine more features into a small board than ever before. With digital modulator, on-board stereo and RDS and all of this full controllable via LCD display with new 2-level MENU system and availability in 15W, 25W, 50W and 100W formats all powered from 12-15V this board represents realization of dreams for most prospective radio station builders.
The design is similar to MAXPRO8015+ and also looks quite similar at first glance, however it comes with on-board integrated digital stereo encoder with RDS. The result is a rugged and solid FM exciter with completely flat power output across the entire FM band at 15W, 25W, 50W or 100W designed to run silently 24/7. Since the new design featuring larger heatsink was so much better and completely stable we were able to add 50W and 100W models. Your dream FM exciter is a reality right now!
Manuals and drivers for most products are available under Additional Information tab above. When downloading drivers your browser might sometimes block the download and you have to allow it manually.
You can find the manual for some products also aqui.
How is STMAX9000 series different from the older STMAX3015 series?
– DIP switch mode supported, works also without LCD
– Greatly improved stability and reliability
– Massive heatsink for 50W and 100W versions
– Completely rewritten software
– Can be controlled entirely via RS232 (no LCD unit required for this) terminal or your control unit, see photos below.
– 0.5W power limit jumper (in addition to 1W, 2W, 4W and 8W)
– New better modern output stage
– Improved output filter
– BNC or MCX antenna output connector (N, SO239-CB and BNC pigtails are available, they plug into MCX)
– Firmware of RF board is now upgradeable (requires USB to serial converter – our RS323 IO board)
– Compatible with old STMAX3015 board, audio input board and display, they will work
How is STMAX different from MAXPRO series?
– Codificadores estéreo e RDS integrados.
– Integrated digital stereo and RDS modulators. This ensures very good audio, but creates spurious artefacts about -50dBc
– Todos os parâmetros ajustáveis do LCD, incluindo RDS RT, PS, PI e outros
– MAPRO line is for professional setups, the signal in STMAX is not as clean
– Can’t be used with MPX STL links as there is no MPX input that MAXPRO series has
Especificações técnicas:
- Potência de saída de RF: 0 a 15 Watts, 0-25W, 0-50W, 0-100W (totalmente variável via LCD em boas etapas graduais), a faixa de ajuste de potência do LCD também pode ser limitada a 0-1W, 0-2W, 0 -3W, 0-4W … 0-15W, 0-full, isso é feito com um jumper (as opções exatas variam dependendo do modelo).
– Output connector: BNC female or MCX female
- Impedância de saída: 50 Ohms
- Faixa de frequência: 87,5-108MHz
- Passos PLL: 50KHz-500KHz, ajustável
– Estabilidade de frequência: +/- 20Hz
– Rejeição Espúrio/Harmônico: Harmônicos: >50dB, Espúrios: >-50dBc
– Fonte de alimentação 15W: 12-15V/2,5A
– Fonte de alimentação modelo 25W: 12-15V/4,5A
– Power Supply 50W model: 12-15V/7A
– Power Supply 100W model: 12-15V/12A
– Power connector 15W, 25W (barrel type, center +), 50W and 100W model: New design with plugin with 2 screw terminals
- Controle de frequência PLL com bloqueio de quartzo, modulador digital DDS
- Nenhum equipamento de teste caro necessário
- Desempenho de áudio: distorção inferior a 0,1%, 20Hz-15KHz
- Robustez de saída RF: proteção SWR, proteção temp
- Proteção de polaridade, proteção de temperatura
– Pré-ênfase, 50uS, 75uS ou nenhum selecionável via LCD
– Nível piloto estéreo ajustável via LCD
– Nível piloto RDS ajustável via LCD
– Nível MPX ajustável via LCD
- Impedância de entrada de áudio: 1Kohm, desequilibrado
– Nível de entrada de áudio: -10dBu, +4dBu (selecionável no LCD)
– Separação estéreo: >50dB
– Relação S/R: >90 dB
– Tamanho da placa de PC: 100x125mm
– Conectores de áudio: 2x jack RCA, conector de 14 pinos para placa de entrada externa com entradas XLR balanceadas
– Monitor RF: almofadas de solda
Controlling STMAX9000 RF board via RS232 terminal (LCD not required)
The RF board board can be controlled with your own LCD display or computer via RS232. All you need is a terminal, the command syntax is very simple. For this to work you do not need any LCD display unit as RS232 port is on RF board itself. The protocol is very simple, this photo explains it all. The pinout of the RS232 header is explained on the board itself. Here is the manual explaining controlling STMAX3015 micro through serial port.
Advanced graphics display with VU meter and web control interface
This is our new advanced high performance graphics OLED display with many incredible new features that older units did not support. First of all, it offers a large graphics OLED display, it connects to internet via Ethernet and than lets you control the unit via web browser (no windows software needed anymore), it lets you update firmware of the display and attached modules which before was not possible, each display comes with two-color bright VU meter, rotary button, and aluminum front panel with plexiglass. Advanced menu system lets you set everything either from the display itself or the web interface. This is of course an optional item. For extensive manual look down under Additional Information tab. Any questions send us an email.
What is the RS232/USB IO board and why do I need it? NOT NEEDED WITH OLED DISPLAY!
IO board is required, if you want to control STMAX9000+ remotely via PC. It plugs into the LCD control module and gives you USB port making it possible to connect STMAX card to PC computer and control it remotely. IO board is also needed to upgrade firmware of STMAX RF board.
OLED graphics display has its own IO board and does not require IO board! It has its own Ethernet adapter.
What is the Ethernet remote control module for? NOT NEEDED WITH OLED DISPLAY!
This add-on card lets you connect this transmitter to the PC via Ethernet network. You can control and monitor the status of your transmitter over Ethernet or Internet. This is of course an optional item. This card requires RS232/USB IO as it plugs into it.
Graphics LCD display has its own USB and Ethernet IO board and does not require extra IO board or ethernet module.
Para que serve a placa de entrada de áudio?
This add-on card adds two XLR balanced inputs and two RCA connectors plus USB audio input. It also comes with extra low pass filter, limiter and a jumper for optional external audio input (from mp3 player or something else). The inputs are ESD protect and have RF filters. This is of course an optional item but it is highly recommended and it does make life easier as you can install exciter far from the audio input connectors. It will improve sound as well, sometimes dramatically.
There is also AES/EBU version of this board!
O que é o Software+IOBOARD para alterar o logotipo?
This is a combination of special unlocked version of software and RS232 IO board, which is required to control STMAX9000+ remotely via PC/RS232. It plugs into the LCD control module. Software lets you change welcome text (logo); you can replace that text with your company name for example. Your customized text will be saved and used at every power-up. This is of course an optional item. Works only with classic LCD displays, not the new graphic OLED.
O que é modificação com software para 76-108MHz?
Este é o IC do microcontrolador com software modificado que permite que as unidades STMAX funcionem de 76MHz a 108MHz. Para usá-lo, você deve remover o IC original do módulo de controle do LCD (está em um soquete) e colocá-lo modificado. Imediatamente a faixa de frequência será expandida. Você pode voltar ao IC padrão a qualquer momento. Este item pode ser adquirido separadamente e também funcionará com unidades STMAX que você comprou no passado (a menos que sejam muito antigas). Certifique-se de levar a versão correta para o seu monitor! Importante: O LCD mostra menos energia do que realmente está disponível abaixo de 76MHz. Além disso, a potência de saída real pode ser um pouco menor que 87MHz, quanto depende da placa, mas geralmente cerca de 20-30% a menos em 76MHz. Além disso, o próprio LCD mostrará menos energia do que realmente está sendo transmitido. Portanto, lembre-se de que sua tela mostrará talvez 5 W, mas 10-12 W serão transmitidos.
What is the Empty enclosure for STMAX9000 for?
This is a very practical enclosure with all holes predrilled. You can install the STMAX9000 inside. It even has a heatsink so it will accept even the 25W, 50W or 100W version. A fan is not included, use 80×80 fan. Holes for the LCD are predrilled as well. No text or brand name is printed anywhere on this box. Look at the video below:
What else should I buy to construct a big 1000W or 2000W or higher transmitter?
Nós realmente recomendamos estes itens para todos os usuários:
– Any of these paletes aqui, uma fonte de alimentação para estes pode ser comprada aqui, don’t forget a filtro (a série LPFMAX é ideal).
– Stereo encoder, any of esses vai fazer. O SE8000 é ideal devido ao MAXLINK II.
– A caixa de rack from 1H to 3H, with fans, accessories and more…
– Use PTFE RG142 50 ohm coaxial para conexões internas dentro do seu rack (PTFE coaxial é mais fácil de trabalhar, não derrete quando quente). Certifique-se de que todos os cabos coaxiais sejam muito curtos.
Para procurar uma antena adequada, verifique: aqui.
Para procurar um cabo coaxial adequado, verifique: aqui.
Para procurar uma verificação de caso adequada: aqui.
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