Motorola MICOM-2E ALE, Owner'S Manual

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Introduction
3
Receiver Features
The radio utilizes Digital Signal Processing for implementing most of the
reception functions like demodulations, narrow filtering, automatic gain
control, noise blanking, and squelch.
The automatic digital noise blanker is activated whenever repetitive
noise (e.g. ignition spikes) is encountered in the received signal. The
digital syllabic (speech identifier) squelch is activated whenever speech
is identified, thus opening the audio path. However, if speech is not
received, the audio path is muted, thus preventing background noise
from disturbing the operator.
Frequency Sources
Two types of frequency sources are available for the MICOM-2E radio.
The standard 0.6 PPM DTCXO frequency source which assures a
frequency stability of better than ±18 Hz. For frequencies lower than
10 MHz, it assures a frequency stability of better than ±6 Hz.
When higher frequency stability is required, the G478 0.1 PPM OCXO
frequency source can be ordered. It will assure a frequency stability of
better than ±3 Hz at 30 MHz.
Power Source
The radio is designed for 13.8 V ± 20% negative-ground operation and
may be connected to a standard 12 V battery.
CW Keying Operation
When the CW key is pressed, the radio transmits a continuous wave (at
the full programmed power) and stops transmission when the key is
released.
CW keying operation is enabled by connecting the Morse key, between
CW (pin #10) and ground (pin #18) at the accessory connector. If you
wish to operate CW keying with external headphones, the S809
Interface can be used, thus enabling a standard PL55 headphone and
standard PL99 Morse key to be connected to the accessories
connector.