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.

TECHNICAL SPECIFICATIONS
Frequency Range
KE/1B, KV/1B	48-80 MHz
KE/FM, KV/FM	80-108 MHz
KE/3B, KV/3B	160-300 MHz
KE/4B, KV/4B	300-512 MHz
KE/5B, KV/5B	512-830 MHz
KE/G, KV/G	830-1020 MHz
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)

TRANSMITTERS SPECIFICATIONS
Power outputs (continuously adjustable from 0 to nominal power)
KE/1B	15 W
KE/FM	30W
KE/3B	15 W
KE/4B	15 W
KE/5B	15 W
KE/G	8 W (25 W on request)
Input connectors	XLR, 600 Ω for mono or stereo (Left&Right) BNC, 10kΩ for MPX
Output connector	N female, 50 Ω
Modulation	FM
Pre-emphasis	0 / 50 / 75 µs
Spurious and harmonic	below 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.
Capability	1 mono/stereo program, up to 3 SCA (optional)
Metering	output level, peak modulation, diagnostic functions
Frequency setting	Internal dip-switches
Dimensions	depth 483 mm (19") x 2 U (standard rack unit)

RECEIVERS SPECIFICATIONS
Monoaural Sensitivity	8 µV for S/N 52 dB, 16 µV/60 dB, 200 µV/70 dB, 1 mV/78 dB
Composite Sensitivity	8 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
Metering	RF input level, peak modulation
Frequency setting	Internal dip-switches
RF input	N female, 50 Ω
Image rejection	> 68 dB
Squelch threshold	adjustable from 8 µV
Outputs	composite, monoaural, IF 10.7 MHz
Dimensions	depth 483 mm (19") x 2 U (standard rack unit)

AC POWER REQUIREMENTS
AC input voltage	115 / 230 VAC ± 15%, single phase
AC supply frequency	50 Hz or 60 Hz, ±5%

ENVIRONMENT
Cooling	Forced air
Service	Continuous 24/24h
Operating temperature	-5°C to +45°C Derate 3°C per 500mt above 2000mt asl
Relative humidity	Up to 95%

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