Midland 278 ASQ — технические характеристики радиоприемника и передатчика [12/56]

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ENGLISH

TECHNICAL SPECIFICATIONS

GENERAL

Channels ............................................................................... (see the frequency band chart)

Frequency Range ................................................................................26.565-27.99125 MHz

Duty cycle (% on 1 hour) ..................................................... TX 5% - RX 5% - Stand-by 90%

Frequency Control ............................................................................................................ PLL

Operating Temperature Range ..............................................................................-10°/+55°C

DC input voltage ............................................................................................12.6VDC±10%

Size...............................................................................................180 (L)x35 (H)x140 (P) mm

Weight ........................................................................................................................0,850 kg

RECEIVER

Receiving system ............................................................... dual conversion superheterodyne

Intermediate frequency .....................................................I°IF:10.695MHz•II°IF:455KHz

Sensitivity ....................................................................... 0.5µVfor20dBSINADinFMmode

........................................................................................ 0.5µVfor20dBSINADinAMmode

Audio output power @10% THD ....................................................................2.0 W @ 8 Ohm

Audio distortion .................................................................................... less than 8% @ 1 KHz

Image rejection ...............................................................................................................65 dB

Adjacent channel rejection .............................................................................................65 dB

Signal/Noise ratio ...........................................................................................................45 dB

Current drain at stand/by .............................................................................................. 250mA

TRANSMITTER

Output power .............................................................................................duty cycle 10% 4W

Modulation ............................................................................................ AM: from 85% to 95%

.............................................................................................................FM: 1,8 KHz ± 0,2 KHz

Frequency response ...........................................................................from 400 Hz to 2.5 KHz

Output impedance ............................................................................. RF 50 Ohm unbalanced

Signal/Noise Ratio .................................................................................................. 40 dB MIN

Current drain....................................................................................................... max 2500mA

Specifications are subject to change without notice.

A readily accessible disconnect device shall be incorporated in the installation wiring.

The disconnect device shall disconnect both poles simultaneously.