MPX. - This is the low cost version, but is not intended for the novice or beginners. The audio input is raw MPX without any audio limiting or stereo coder circuitry, this must be provided externally in accordance with the recommendations of https://www.aareff.com/ETR132.pdf
Stereo Version. - This is identical to Mono/MPX version but with a stereo coder built in. RDS cannot be used with this. Again it does not include audio limiting, so it's not recommended for the novice or beginner. External limiting need to comply with the recommendations of https://www.aareff.com/ETR132.pdf
Stereo and Audio Processing. - Most small radio stations and beginners will use this version, this is because it includes audio processing circuitry and suitable limiting to keep the transmitter in compliance with the maximum bandwidth permitted by the international regulations.
Click here for user manual
200 Watts with a high performance well installed antenna is a typical set up for a local radio station for a big town or small city. In rural areas up to 40 miles range is posssible.
On the underside of this unit controls are accessible to set the:
All the versions of this transmitter will operate with a power supply of 90 to 260V AC.
The internal 200 watt amplifier blocks will operate with ease at full power 24 hours a day non stop in any country and with any AC voltage in the world. The front panel of this tarsnmitter has a neat little meter panel lit up with intense blue LED's to indicate forward and reflected power. The RF output power of the amplifier automatically folds back to a safe level when there is fault condition of poor SWR and return loss of any level for any duration of time. When the fault clears the amplifier restores to full power.
On delivery the equipment is ready to plug in and use with any suitable 50 ohm antenna system such as our Vertical 5/8 Wave, Single Dipole, 2 Way Stacked Dipole, 4 Way Stacked Dipole, 8 Way Stacked Dipole or Circular/Mixed antennas.
Our 500W ERP package includes this transmitter complete with antennas and cables ready to go. It is a full system that complies with the regulations of the European Union and most other countries in the world.
Instructions are supplied to show the station engineer how to set this system to any frequency between 87.5 and 108.0 MHz, this is easily done by reconfiguring the dip switches on the under side panel of the 1 watt driver exciter. However, when we test this system we have to set it to some frequency, we prefer it to be the one you choose, so please select from the box above the frequency you would like it set to on delivery.
This FM transmitter system along with all our other products comes with a limited 2 year warranty (see warranty conditions)
| Audio Input Sensitivity | +4 dBu for +/- 75 KHz dev. |
| Freq Stability | +/- 1 KHz max. typ. +/-300 Hz |
| Deviation Sensitivity Stability | +/-2 % max |
| Freq Fine Adj | > +/- 1000 Hz |
| Pre-emphasis | (50 uS/ 75 uS/ None) Selectable |
| Audio Input Connector | Phono/ RCA type unbalanced sockets |
| Power Output | Adj. 10 to 200 Watt into 50 ohms |
| Freq Range | 87.5 to 108 MHz in 100 KHz steps |
| Spurious Emissions | Less than -75 dB ref to carrier |
| Harmonic Emissions | Less than -70 dB ref to carrier |
| Out of Lock RF Muting | Less than -70 dB ref to carrier |
| Residual AM | Less than 0.5 % |
| Synchronous AM | Less than 0.5 % |
| RF Ruggedness | Any VSWR phase or length of time |
| Output Connector | SO239 (or optional N type) |
| Operating Temp | -20 to +40 Deg C |
| Version | MPX | Stereo | Stereo and Audio Processor |
| Signal To Noise Ratio | 80dB | 65dB | 65dB |
| Frequency Response | 30Hz-76KHz | 30Hz-15KHz | 30Hz-15KHz |
| Audio Distortion | 0.2% THD Max | 0.2% THD Max | 0.2% THD Max (at MPX section) |
| Stereo Pilot Tone | None | 19KHz +/-0.2Hz | 19KHz +/-0.2Hz |
| Model | SP-240-24 x 2 |
| Input Voltage | 88 ~ 264VAC 124 ~ 370VDC 47-63 Hz |
| Power Factor | PF more than 0.95/230VAC PF more than 0.98/115VAC at full load |
| Efficiency | 87% |
| Input Power | 400W max. for 200W RF OUT with RF SWR less than 1.5 |
| Working Humidity | 20-90% RH non-condensing |
| Safety Standards | UL60950-1, TUV EN60950-1 approved |
| EMC Emission | Compliance to EN55022 (CISPR22) Class B, EN61000-3-2,-3 |
| EMC Immunity | Compliance to EN61000-4-2,3,4,5,6,8,11, EN55024, light industry level, criteria A |
All these models comply with European standards ETS 300384 for R&TTE, EN 301 489-11 for EMC and (LVD) 2006/95/EC for safety, the relevant FCC sections of US 47 CFR Part 73 for verification and ITU-R BS.450-3 (11/01) FM Broadcasting at VHF.