Microwave Radio Links


Synthesized receiver from 1.1 to 2.7 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 Specifications:
Output frequency range 1.4 - 2.7 MHz
Audio frequency output -8 to +6 dBm on 600 W
IF output -10 dBm to 10.7 MHz / 50 W
input impedance 50 W
input connector N
Local oscillators stability ≤ 5ppm
de-emphasis 50 / 75 µs
input voltage range 1 µV ÷ 20 mV rms
Image rejection > 68 dB
lowest threshold squelch 1 µV
frequency linearity (20 Hz ÷ 100 kHz) ± 0.5 dB
Noise factor (typ) 6 dB
Pass Band filters insertion losses ≤ 0.3 dB

Receiver band (selectivity):
3 dB IF bandwidth @ 180 KHz
60 dB IF bandwidth @ 600 KHz

Receiver sensitivity:

MonoAural (demod. and de-emphasised):
for S/N ≥ 50 dB -90 dBm
for S/N ≥ 60 dB -83 dBm
for S/N ≥ 70 dB -75 dBm

Composite (left or right, demod. and de-emphasised):
for S/N ≥ 30 dB -89 dBm
for S/N ≥ 40 dB -78 dBm
for S/N ≥ 55 dB -65 dBm
for S/N ≥ 65 dB -60 dBm

Signal / Noise ratio: mono (de-emphasised) > 74 dB
stereo (left or right, de-emphasised) > 68 dB

Power requirements:
Operating voltage 110/220 Vac ± 10 %, 50/60 Hz
Power drains 15VA
Battery operation (optional) 12 Vcc 1.2 A

Operating conditions:
MTBF 19 years
Cooling natural convection
Operating temperature -5°÷ +45°C
Relative humidity 95% max

Weight and size:
Weight 45 kg
W x H x D (see options) 483 x 90 x 410 mm

ITEL S.r.l.
Via Friuli, 6 - 33074 Fontanafredda (PN) - ITALY
Tel. +39 0434 997667 - Fax. +39 0434 997687