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Analog STL audio links KE-KV

The KE and KV analog STL Series are the best audio quality links for broadcasting networks.


  • 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.

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

  • 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 studio equipment.

  • Low THD distortion: the THD value with stereo or mono demodulated signals is negligible.



  • 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.

  • High frequency stability with the internal temperature compensated crystal reference.

  • 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
KE/1B, KV/1B48-80 MHz
KE/FM, KV/FM80-108 MHz
KE/3B, KV/3B160-300 MHz
KE/4B, KV/4B300-512 MHz
KE/5B, KV/5B512-830 MHz
KE/G, KV/G830-1020 MHz
KE/2G, KV/2G1.1-2.7 GHz
Composite Frequency response± 0.1 dB typ. from 16 Hz to 53 kHz, 0.5 dB up to 100 kHz
Mono Frequency response±0.5 dB from 20 Hz to 15 kHz
Stereo separation≥ 58 dB (from 15 Hz to 15 kHz)
Stereo cross talk≥ 55 dB
Signal to Noise Ratio (mono) (-50 dBm received)≥ 72 dB with 75 kHz dev. deemphasized
Signal to Noise Ratio (stereo) (-50 dBm received)≥ 68 dB with 75 kHz dev. deemphasized
THD (stereo)< 0.1 %
THD (mono)< 0.1 %
IMD (two tone ΔF= 1 kHz)D2 ≤ 0.09%, D3 ≤ 0.06% (from 15 Hz to 15 kHz)

Power outputs (continuously adjustable from 0 to nominal power)
KE/1B15 W
KE/3B15 W
KE/4B15 W
KE/5B15 W
KE/G8 W (25 W on request)
KE/2G2 W
KE5/2G5 W (10 W, 25 W on request)
Input connectorsXLR, 600 Ω for mono or stereo (Left&Right) BNC, 10kΩ for MPX
Output connectorN female, 50 Ω
Pre-emphasis0 / 50 / 75 µs
Spurious and harmonicbelow FCC and CCIR requirements
Syncronous AM S/N Ratio≤ -60 dBc with dev. ±75 kHz
Asyncronous AM S/N Ratio≤ -70 dBc respect to 100% AM mod.
Capability1 mono/stereo program, up to 3 SCA (optional)
Meteringoutput level, peak modulation, diagnostic functions
Frequency settingInternal dip-switches
Dimensionsdepth 483 mm (19") x 2 U (standard rack unit)

Monoaural Sensitivity8 µV for S/N 52 dB, 16 µV/60 dB, 200 µV/70 dB, 1 mV/78 dB
Composite Sensitivity8 µV for S/N 40 dB, 16 µV/42 dB, 150 µV/60 dB, 1 mV/72 dB
Noise figure(RFin = 2mV) < 8 KTo
Selectivity± 160 kHz at -3 dB IF BW, ± 500 kHz at -78 dB IF BW
MeteringRF input level, peak modulation
Frequency settingInternal dip-switches
RF inputN female, 50 Ω
Image rejection> 68 dB
Squelch thresholdadjustable from 8 µV
Outputscomposite, monoaural, IF 10.7 MHz
Dimensionsdepth 483 mm (19") x 2 U (standard rack unit)

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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