Midland 248 User Manual

ENGLISH
1
INDEX
Introduction .............................................................................................................Pag. 1
Function and location of the controls .....................................................................Pag. 2
Installation ...............................................................................................................Pag.5
Power supply ...........................................................................................................Pag.5
Installing an antenna ...............................................................................................Pag.5
How to operate with your transceiver ......................................................................Pag.6
Frequency band selection .......................................................................................Pag.6
Frequency band chart .............................................................................................Pag.6
Technical specifications ...........................................................................................Pag.7
Your MIDLAND 248 represents the state-of-the art in high-tech engineering. Designed
for the Citizen Band Mobile operation, this compact package is big in performance. It is
a quality piece of electronic equipment, skillfully constructed with the finest components.
The circuitry is all a solid-state, mounted on rugged printed circuit boards. It is designed
for many years of reliable, trouble-free performance.The night-light buttons allow the
night use.Your MIDLAND 248 has a built Channel Phase-Locked Loop synthesizer
circuit.
The PLL circuit achieves a new technique for generating all the required frequencies
with fewer crystals. The result is much tighter frequency control and superior reliability.
MIDLAND 248 is equipped with the “NOISE BLANKER” (noise reducer device) that
reduces considerably the audio noises up to 95%, allowing a clear communication even
when the signal is disturbed.

Midland 248 Specifications

Operating Environment

frequency range	26.565 - 27.99125 MHz
duty cycle	TX 5% - RX 5% - Stand-by 90%
operating temperature range	-10°/+55° C

Power

dc input voltage	12.6VDC ±10%
current drain at stand-by	250mA
current drain max	2500 mA

Receiver

sensitivity fm mode	0.5µV for 20 dB SINAD
audio output power	2.0 W @ 8 Ohm
audio distortion	less than 8% @ 1 KHz

Transmitter

output power	4W max
modulation am	from 85% to 95%
modulation fm	1, 8 KHz ± 0, 2 KHz

Weight and Dimensions

size	180 (L)x50 (H)x150 (P) mm
weight	1kg