Description ：

• The STL10 Studio 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.

　Features ：

• Synthesized from 220 to 260MHz, 300~320MHz, 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.
• 
  
  　Specification ：
• 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, ±75 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 Ω
  
• RF output connector: N Type -female
  
• Audio/MPX input level: -10 to +13 dBm @±75 KHz deviation
  
• Audio/MPX input impedance: 10 KΩ / 600 Ω, Balanced / unbalanced
  
• Audio input connector: XLR-female
  
• AUX / MPX input level: -10 to +13 dBm @±75 KHz deviation
  
• AUX channel input impedance: 10 KΩ
  
• 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 universal input
  
• Operating temperature range: -10 to 45 ℃
  
• Dimensions : 483 x 132.5 x 400 mm, rack std. 19” 2U
  
• Weight: 6.5 Kg
  
• --TECHNICAL CHARACTERISTICS of RECEIVER
  
• 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.
  
• 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: 600Ω balanced
  
• Stereo audio output connector: XLR-M
  
• MPX output impedance: 10KΩ
  
• MPX output connector: BNC-F
  
• Monitor output: >2x0.2 W stereo at 120Ω
  
• Monitor output connector: 6.3mm stereo phone jack
  
• RF input impedance: 50Ω
  
• 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 ℃
  
• Dimensions : 483 x 89 x 320 mm , rack std. 19” 2U
  
• Weight: 5 Kg

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