Major M580 Manuale di istruzioni - Pagina 2

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GENERAL DESCRIPTION

This transceiver is an advanced AM/FM
2-way radio designed primarily for mobile
operation.
It employs the very latest
technology to provide 80 channels of
operation by means of digital frequency
synthesis with Phase Lock Loop (PLL)
circuitry.
The use of PLL circuitry as­
sures a précisé on-frequency operation on
every channel in both AM and FM modes
that is unmatched by conventional crystal
frequency synthesis.
This transceiver also includes many fea-
tures which will provide greater operating
convenience and assure optimum com­
munications under a wide range of
conditions. Other features are:
• 80 channels operation
• AM — FM mode switch for easy sélec­
tion of operating mode.
• Illuminated meter indicates "S" units

TECHNICAL SPECIFICATIONS

GENERAL
Circuitry:
Channels:
Mode of Operation:
Power Source:

RECEIVER SECTION

Circuit Type:
Sensitivity:
Selectivity:
Image Rejection:
2
Digital Phase Lock
Loop Synthesizer.
80 channels.
AM, FM.
13,8V DC [nega­
tive or positive
ground] .
Dual conversion
superheterodyne
with RF stage and
455 kHz ceramic-
filter.
0.7 juV for 10 dB
S/N.
45 dB down at
±10 kHz.
40 dB.
and RF power output.
• LED digital channel read-out.
• Switchable Noise Blanker + ANL for
effective réduction of noise.
• Transmit (Tx) indicator lights.
• Variable Squelch control.
• RF
Gain
control/push-pull
switch (Hi-Lo).
• Built-in ceramic filter helps prevent
adjacent channel interférence.
• Built-in automatic modulation control
circuit.
• Provision
for
volume control.
• External speaker jack.
• Convenient Sélective Call input jack.
• Floating chassis for either negative or
positive ground mobile operation.
• Push-to-Talk dynamie mic with coiled
cord.
Spurious Rejection:
AGC Range [for 10 dB
level change] :
Squelch Range:
IF Frequency:
Audio Output Power: 3 watts into " EXT.
Current Drain:

TRANSMITTER SECTION

RF Power Output:
Emission:
Harmonie and Spurious
Suppression:
band
PA
operation
with
50 dB.
70 dB.
0.7
V to 500
V.
m
m
Ist IF: 10.695 MHz
2nd IF: 455 kHz
SP" jack [at 8
ohms] .
300 mA on stand-
by [no signal] .
Up to 4 watts at
13.8V DC.
6A 3/6F3
40 dB.