The series 8000 modular design concept permits a wide variety of configurations of low density links in the 960 MHz and 2 GHz microwave communications bands. Future changes and expansions are readily accomplished with a minimum of field rework or down time. Systems can be optimized for particular applications with optional transmitter powers and receiver bandwidths. In Series 8000, Nutel can provide one-way or duplex terminals and repeaters in unprotected, protected, and space/frequency diversity systems.
In the 790 to 960 MHz range, Series 8000 can carry up to 36 fequency division multiplex channels plus a service channel. RF power options are 0.5,1.5, and 6.0 watts minimum. Receive bandwidth options are 35 kHz, 100 kHz, 200 kHz and 800 kHz.
In accordance with the United States FCC Rules for private microwave systems operating within the 952 to 960 MHz band, emission bandwidth is limited to 200 KhZ. Within this limitation, Nutel Series 8000 can carry up to 12 voice channels plus a service channel. In addition, The radio is also capable of operation in the 932.5 to 935 MHz / 941.5 to 944 MHz bands for the proposed government/private shared point to point service.
In the 1700 to 2500 MHz range, Series 8000 systems can carry up to 36
frequency division multiplex channels plus a service channel. RF power
is 1.0 watt minimum. Receiver bandwidth options are 200 kHz, and 800 kHz.
The 960 MHz equipment uses a transistor tripler which yields exceptional efficiency. The 0.5 watt transmitter requires less than 5 watts DC power, and the 1.5 watt unit less than 13.4 watts DC. The optional 6 watt amplifier needs 15.6 watts DC power.
The 2 GHz transmitters use a 320 MHz power amplifier followed by a single step recovery diode multiplier of either X6, X7 or X8.
Transmitter model numbers, power output and frequency ranges are summerized in Table 1.
Series 8000 receivers employ dual conversion with intermediate frequencies of 30 MHz and 5.4 MHz. Bandwidth options are provided by replaceable IF filters.
Receiver model number, IF bandwidths, and thresholds are summarized in Table 1.
|Transformer coupled port||75 ohm bal. or unbal.|
|600/150 ohm optional|
|Direct coupled port||600 ohm unbalanced|
|Transformer coupled port||300 Hz to top BB freq. +/- 0.5 dB|
|Direct coupled port||20 Hz to top BB freq. +/- 0.5 dB|
|Spurious Outputs||More than 60 dB down|
|Spurious Response||More than 60 dB down|
|Selectivity||3/6 dB||60 dB|
|35 kHz||35 kHz @ 3 dB||140 kHz|
|100 kHz||100 kHz @ 6 dB||400 kHz|
|200 kHz||200 kHz @ 3 dB||1800 kHz|
|800 kHz||800 kHz @ 6 dB||3200 kHz|
|Specification and operating||-35 C to + 65 C|
|Storage||-40 C to +70 C|
|Humidity||0 to 95% noncondensing|
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