Why Choose STL-10 STL Transmitter and Receiver for FM Radio Station?

Why STL-10 Studio Transmitter Link Equipment?

STL10 Studio to Transmitter Link / Inter-city Relay is a VHF / UHF FM communications system providing 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.

What You Should Know About Studio Transmitter Link

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 kilometers away.

Depending on the locations that must be connected, a station may choose either a point-to-point (PTP) link on another special radiofrequency 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.

Benefits You Can Not Resist

• 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 component's 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¡ˉs in multi-hop networks without decreasing the audio quality.
• High sensitivity: it allows to reduces the STL’s antenna investment.
• Great RF immunity: allows operating 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 of front panel LCD displays.
• Integrated information display and protection controls: for all transmit parameters and protection for malfunction.

1* STL Transmitter

1* STL Receiver

Best Studio to Transmitter Link Equipment

Stl-10 STL 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

Stl-10 STL 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