FMUSER STL10 Studio Transmitter Link for FM Radio Station

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  • Price (USD): 3310
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A studio-transmitter link (or STL) refers to a complete FM broadcast system that sends a radio station’s or television station’s audio and video signal from the broadcast studio to a radio transmitter or television transmitter in another location. Some systematic STL such as STL10 Studio to Transmitter Link/Inter-city Relay VHF/UHF FM communications system provides the customers a high-quality broadcast audio channel with a variety of 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. 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 kilometers 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.


High definition front digital panel can easily set the transmitting and receiving frequencies from 220 to 260MHz, 300 to 320mhz, 320 to 340mhz, 400 to 420MHz, 450 to 490mhz.

The feedback circuit is used to control subsonic over modulation and low frequency phase distortion to improve the sound quality of the latest digital system, which is more suitable for digital audio.

Low THD distortion: The value of stereo or mono demodulation and de emphasis signal can be ignored.

Using the latest generation technology and high precision components, the flatness of frequency response is absolute.

Low noise: both mono and stereo have good signal-to-noise ratio. This STL can be used in multi hop networks without reducing audio quality.

High sensitivity can greatly reduce the cost of STL antenna.

Strong RF immunity allows the product to operate in most harsh RF environments.

High adjacent channel rejection: due to excellent mechanical shielding and RF filtering accuracy.

The internal temperature compensates the high frequency stability of the crystal reference.

Integrated LCD: complete diagnosis and measurement front panel LCD.

The integrated information display and protection control system can be used for all transmission parameters and fault protection.

1* STL Transmitter

1* STL Receiver

Technical Specification – 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 15 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 @+/-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 @+/-75 KHz dev. <0.2% THD @+/- 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 and universal input

Operating temperature range: -10 to 45 Celsius degrees

Dimensions : 483 x 132.5 x 400 mm, rack std. 19”± 2U

Weight: 6.5 Kg

Technical Specification- 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 @-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 Celsius degrees

Dimensions: 483 x 89 x 320 mm , rack std. 19” 2U

Weight: 5 Kg






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