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Post by pcs »

DSP digital signal synthesis, excellent audio, on-board stereo and RDS
The design of the STMAX 3000+ micro series is based on STMAX3015+ and also looks quite similar at first glance (while being smaller), however it comes with a different DSP modulator and DIP switches. The result is a rugged and solid FM exciter with completely flat power output across the entire FM band at 15W or 25W, designed to run silently 24/7. Your dream FM exciter is a reality right now!

Manual for STMAX30xx FM exciter board: ... _V2_en.pdf

You can purchase this product here: ... -exciters/

Software for remote control: ... _Setup.exe

How is STMAX3000 micro different from the STMAX3000?
– Smaller form factor
– DIP switch mode supported, works also without LCD
– Can be controlled entirely via RS232 (no LCD unit required for this) terminal or your control unit, see photos below.
– Available in 15W and 25W flavor
– 0.5W power limit jumper (in addition to 1W, 2W, 4W and 8W)
– New better modern output transistor
– 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 STMAX3015 board (it is smaller but you can use old display and audio input boards with these and it will work)

Technical specifications:
– RF Output Power: 0 to 15 Watts, 0-25W (fully variable via LCD in nice gradual steps), LCD power adjustment range can also be limited to 0-500mW, 0-1W, 0-2W, 0-3W, 0-4W … 0-15W, 0-full, this is done with a jumper (exact options vary depending on model).
– Output antenna connector: Soldering directly or MCX socket (get pigtail to obtain N female or BNC female)
– Output Impedance: 50 Ohms
– Frequency range: 87.5-108MHz (expandable to 76-108MHz with microcontroller)
– PLL Steps: 50KHz
– Frequency stability: +/- 50Hz
– Spurious/Harmonic rejection: Harmonics: >50dB, Spurious: >-50dBc
– Power Supply 15W: 12-15V/2.5A
– Power Supply 25W model: 12-15V/4A
– Power connector. 3-wire connector (middle is +), the cable is included
– Quartz Locked PLL Frequency Control, DSP digital modulator
– No Expensive Test Equipment Required
– Audio performance: Less than 0.1% distortion, 20Hz-15KHz
– RF output ruggedness: SWR protection, temp protection
– Pre-emphasis, 50uS, 75uS selectable via LCD
– Audio Input Impedance: ~ 1Kohm, unbalanced
– Audio Input Level: -10dBu, +4dBu (selectable from LCD)
– PC Board Size: 100x125mm
– Audio connectors: 2x RCA jack (optional), 14-pin connector for external input board with balanced XLR inputs
– RF monitor: solder pads
Best regards,
Marko - PCS Electronics
Turn your PC into a FM radio station!
fax +386 4 2316 128
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