Microwave Radio Links
Synthesized from 300 to 512 MHz.
The transmitter and recivered frequency can be easily setted by the internal dip - switches or by the front panel numerical selector (/C option).
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 15 kHz band.
Suitable for digital audio. The subsonic overmodulation 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 STLs 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.
Full metering: complete diagnostic and measurement front panel displays are available.
Battery operations. VDC option is available for battery or solar panels operations.
Meets or exceeds all FCC and CCIR requirements.
Microwave Radio Links
RF characteristics:
Output frequency range 290 - 512 MHz
Output frequency setting synthesized
with a 10 kHz step PLL (front-panel digiswitches microprocessor-controlled
through /C option)
Output impedance 50 W
Output connector N
Continuous output power 0÷15 W continuously adjustable
Frequency stability:
Thermal drift (0 ÷ 50 °C) ± 250 Hz
Ageing drift ±
300 Hz/year
Harmonics ≤ -63 dB
Spurious ≤ -80 dB
Syncro AM modulation ≤ -55 dB
Asyncro AM modulation ≤ -60 dB
A.F.
Mono operations:
Input level -6÷+10
dBm adj.
Input connectors XLR balanced
Input impedance 600 W
Bandwidth
(± 0.25 dB) 20 Hz÷15 KHz
19 kHz attenuation ≥ 50 dB
Pre-emphasis
50/75 µs
FM S/N ratio (±75 kHz deviation at 1 kHz, 50 µs
de-emph.) ≥ 80 dB
THD + N (± 75 kHz peak dev. with 1 kHz input,
unweighted) ≤ 0.1 %
Stereo operations (with a stereo coder included
in the /S model):
Input level -6 ÷ +10 dBm
Input connector XLR balanced
Input impedance 600 W
Bandwidth (± 0.2 dB) 20 Hz÷15 KHz
19 kHz attenuation ≥ 50 dB
Pre-emphasis 50/75 µs
FM S/N ratio (±75 kHz deviation at 1 kHz, demodul., 50 µs
de-emphasis) ≥ 73 dB
THD +N (± 75 kHz peak dev. with 1 kHz input,
unweighted) < 0.1%
Stereo separation (20 Hz÷15 kHz) ≥ 55 dB
Stereo operations (with an external stereo coder):
MPX input level
2.2 Vpp per 75 kHz dev.
Input connector BNC
Input impedance 10 KW
Bandwidth
(± 0.25 dB) 20 Hz - 100 kHz
Power requirements:
Operating voltage
115/230 Vac ± 10 %, 50/60 Hz
Power consumption (at 25 W output)
50 VA
Battery operation (optional) 12 Vcc
Operating conditions:
Cooling
air forced, 12Vcc axial fan
Operating temperature -10°÷ +45°C
Relative humidity 95%
Weight and size:
Weight 8 kg
W x H x D (see options)
483 x 90 x 430 mm
Options:
External frequency setting (/C)
Stereo coder
(/S)
Remote control (/R)
Battery operation (/VDC)
ITEL S.r.l. TELECOMUNICATIONS AND BROADCASTING SERVICES Via Friuli, 6 - 33074 Fontanafredda (PN) - ITALY Tel. +39 0434 997667 - Fax. +39 0434 997687