Midland 278 ASQ Инструкция по эксплуатации онлайн [12/56]
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ENGLISH
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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.