Technical Specifications - Midland 278 Manual Del Usuario

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 .............................................................................................................. 4W max
Modulation ............................................................................................ AM: from 85% to 95%
.............................................................................................................FM: 1,8 KHz ± 0,2 KHz
Frequency response .......................................................................................... 300 Hz/3 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.