>radio transmission equipment, no need to stay beside the transmitter all the time
>10~40km distance,1year warra
radio transmission equipment
FMUSER radio transmission equipment,your smart choice.
FMUSER STL10 radio transmission equipment for FM Radio Station 10-40km Studio to Transmitter Hill
FMUSER STL10 Studio to Transmitter Link for FM Radio Station Yagi Antenna 20m SYV-50-5 Cable
radio transmission equipment
A studio-transmitter link (or STL) sends a radio station's or television station's audio and video from the broadcast studio to a radio transmitter or television transmitter in another location.
This is often necessary because the best locations for an antenna are on top of a mountain, where a much shorter tower is required, but where a studio is completely impractical. Even in flat regions, the center of the station's allowed coverage area may not be near the studio location or within a populated area where a transmitter would be frowned upon by the community, so the antenna must be placed several miles or kilometres away.
Depending on the locations that must be connected, a station may choose either a point to point (PTP) link on another special radio frequency, or a newer all-digital wired link via a dedicated T1 or E1 (or larger-capacity) line. Radio links can also be digital, or the older analog type, or a hybrid of the two. Even on older all-analog systems, multiple audio and data channels can be sent using subcarriers.
STL10 Studio to Transmitter Link / Inter-city Relay is a VHF / UHF FM communications system providing a high quality broadcast audio channel with variety optional bands.These systems offer greater rejection of interference, superior noise performance, much lower channel cross-talk, and greater redundancy than currently available composite STL systems.
*Synthesized from 220 to 260MHz, 300 to 320MHz, 320 to 340MHz,400 to 420MHz and 450 to 490MHz *The transmitted and received frequency can be easily set by digital front panel *Suitable for digital audio. The subsonic over modulation and the low frequency phase distortion are controlled by a feedback circuit in order to exalt the audio quality of the latest digital systems. *Low THD distortion: the THD value with stereo or mono demodulated and deemphasized signals is negligible. *Flat frequency response: due to the latest generation technology and the components precision the flatness of frequency response is absolute. *Low noise: the excellent signal to noise ratio either in mono or in stereo allows the use of this STL¡¯s in multi-hops networks without decreasing the audio quality. *High sensitivity: it allows to reduce the STL's antennas investment. *Great RF immunity: allows to operate in most hostile RF environments. *High adjacent channel rejection: obtained thanks to the excellent mechanical shielding and the precision of RF filtering. *High frequency stability with the internal temperature compensated crystal reference. * Integrated LCD Display: complete diagnostic and measurement front panel LCD displays. *Integrated information display and protection controls: for all transmit parameter and protection for malfunction.
Technical Specification for transmitter:
*Frequency range: 220 to 239.99 MHz , 240 to 259.99 MHz , 300 to 319.99 MHz, 400 to 419.99 MHz , 450 to 469.99 MHz , 470 to 489.99 MHz. * Modulation: FM, +/-5 KHz peak deviation *Frequency stability: <+/-100 Hz * RF output power: 0 to 25 W +/-0.5 dB * Max reflected power: 5 W * Harmonic suppression: <-65 dBC * RF output impedance: 50 ohm * RF output connector: N Type -female * Audio/MPX input level: -10 to +13 dBm at +/-75 KHz deviation * Audio/MPX input impedance: 10 K Ohm *MPX and AUX input connector: BNC-female *Pre-emphasis: 0 / 25/ 50 / 75 us *S/N ratio Mono: >73 dB (20 to 20 KHz) *S/N ratio Stereo: >68 dB (20 to 15 KHz) *Distortion: <0.05% THD at +/-75 KHz dev. <0.2% THD at +/- 150 KHz dev. (limiter threshold > 150 KHz) *Stereo crosstalk: >60 dB (100 to 5 KHz) >50 dB (20 to 15 KHz) int. MPX encoder >60 dB with ext. MPX encoder *Audio channel frequency response: 20 to 15 KHz +/- 0.15 dB *MPX input frequency response: 10 to 100 KHz +/- 0.15 dB *AUX input frequency response: 10 to 100 KHz +/- 0.15 dB *Mains power supply requirements: 90~264VAC; 127~370VDC, Full range universal input *Operating temperature range: -10 to 45 celcius degrees *Dimensions : 483 x 132.5 x 400 mm, rack std. 19'± 2U *Weight: 6.5 Kg
Technical Specification for receiver:
* Frequency range: 220 to 239.99 MHz , 240 to 259.99 MHz , 300 to 319.99MHz, 400 to 419.99 MHz , 450 to 469.99 MHz , 470 to 489.99 MHz. * Sensitivity: -98 dBm at 16 dB SINDA * Frequency response: 20 Hz to 53 KHz +/-0.1 dB * Stereo separation: 20 Hz to 15 KHz >58 dB * S/N Ratio : >65 dB at -40 dBm , 75 KHz dev. and 1 KHz mod. * THD : 20 Hz to 53 KHz \<0.3% * Selectivity: +/-160 KHz at -3 dB IF BW +/-500 KHz at -62 dB IF BW * Image rejection: >65 dB * Stereo audio output impedance: 600Ohm balanced * Stereo audio output connector: XLR-M * MPX output impedance: 10K Ohm * MPX output connector: BNC-F * Monitor output: >2×0.2 W stereo at 120 Ohm * Monitor output connector: 6.3mm stereo phone jack * RF input impedance: 50Ohm * RF input connector: N Type -female * AC power: 85~264VAC; 120~370VDC, Full range universal input * Power consumption: approx 25W from AC * Operating temperature range: -10 to 45 celcius degrees * Dimensions : 483 x 89 x 320 mm , rack std. 19' 2U * Weight: 5 Kg
1x STL Transmitter
1x STL Receiver
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