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Studio to transmitter audio link STL DTS–DRS

The DTS and DRS Series are the perfect solution for Studio-to-Transmitter audio links, matching the networking needs of international broadcasters. These products are designed to be frequency agile and to reach the higher audio modulation performances with a very intuitive and complete front panel LCD display control system.

The excellent characteristics make the DTS/DRS series one of the highest quality STL on the market.


  • Synthesized agility: from 210-970 MHz (3B, / 4B, / GHz models) and 1,35-2,5 GHz (2G models), the transmission and reception of frequencies can be easily set from the front panel LCD display. 

  • Compact, simple, stable: The compact dimensions of the units, the smart internal design for easy maintenance, the very high frequency precision and stability thanks to the temperature compensated crystal are only a few key points for this STL Series.

  • Excellent stereo separation: A built-in group delay and amplitude precorrector guarantees a very low linear distortion and a great stereo separation in the whole 15kHz band.


  • Low noise: the excellent signal to noise ratio either in mono or in stereo allows the use of this STLs in multi hops networks without decreasing the audio quality.

  • High sensitivity: using ultra low noise receiving input amplifiers, selective filters and with a powerful demodulation circuit the obtained receivers sensitivity is very high, so allowing longer link distances with reduced antenna investment also in highly noisy RF environments.

  • 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 channel filtering.

  • Full metering: complete diagnostic and measurement front panel displays are available. Full remote control is available as WEB server and/or SNMP as option.

  • Meets or exceeds all FCC and CCIR requirements.

Frequency Range:
DRS/FM87.5-108 MHz
DTS/3B, DRS/3B210-270 MHz
DTS/4B, DRS/4B310-470 MHz
DTS/G, DRS/G900-970 MHz
DTS/2G, DRS/2G1350-1800 MHz 2370-2480 MHz

Power outputs (continuously adjustable from 0 to nominal power):
DTS/3Bmax 13 W
DTS/4Bmax 13 W
DTS/Gmax 13 W
DTS/2Gmax 5 W (25 W on request)
Output impedance50 Ω
Output connectorN female
ModulationFM, 75 kHz peak deviation, 180k F3E mono, 256k F3E stereo
Audio/MPX Input level-3.5 ÷ +12.5 dBm @ ± 75kHz deviation
Audio Input connectorXLR female
Auxiliary Channel input level-12.5 ÷ +3.5 dBm @ ±7.5 kHz dev.
MPX, Auxiliary and monitor connectorsBNC
Transmitter MPX monitor output level0 ÷ +7dB, adjustable
Pre-emphasis0 / 50 / 75 µs
Spurious and harmonic emissionsbelow FCC and CCIR requirements
Syncronous AM S/N Ratio<-60 dBc with ΔF ±75 kHz
Asyncronous AM S/N Ratio<-70 dBc
Capability1 mono/stereo program, up to 3 SCA (optional)
Meteringoutput forward and reflected power, peak modulation, diagnostic functions
Dimensionsdepth 483 mm (19") x 2 U (standard rack unit)

MPX/mono Output level-1.5 ÷ +12 dBm, 0.5 dB/step
Monoaural Sensitivity< - 90 dBm
Composite Sensitivity< -68 dBm
Dynamic Selectivity> +10 dB typ @ δF=300kHz > +35 dB typ @ δF=500kHz > +45 dB typ @ δF=1.0 MHz
MeteringRF input level, peak modulation
RF inputN female, 50 Ω
Image rejection> 68 dB
Squelch thresholdadjustable from -100 dBm
Outputscomposite, monoaural, IF 10.7 MHz
Dimensionsdepth 483 mm (19

AC input voltage115 / 230 VAC ± 15%, single phase
AC supply frequency50 Hz or 60 Hz, ±5%

CoolingForced air
ServiceContinuous 24/24h
Operating temperature-5°C to +45°C Derate 3°C per 500mt above 2000mt asl
Relative humidityUp to 95%

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