Power Control Circuitry - Motorola MSF 5000 Instruction Manual

Chapter
1
Description
MSF
5000
Instruction Manual
Uniboard
TO
AMP
TO
MSFX018
022494K0M
Figure 1-27
Receive Synthesizer Block
Diagram
The
limiter
/detector
includes
three stages
of
I-F
amplification; quadrature
FM
-detector,
audio preamplifier, and signal level metering output. The recovered
audio output is applied
to a discrete
audio buffer amplifier. This amplifier
provides
a
low
impedance source to
drive circuitry in
the
power
control section.
Power Control Circuitry
The power control circuit provides
the
following
circuits:
O
RE
Power Leveling Circuit
©
Power Cutback Circuit
O
Transniitter Shut-down Circuit
Refer
to
Figure
1-28
for a functional block diagram of
the
power control circuitry.
1-56
68P81092E02 3/19/94
Chapter
1
Description
MSF
5000
Instruction Manual
Uniboard
TO
AMP
TO
MSFX018
022494K0M
Figure 1-27
Receive Synthesizer Block
Diagram
The
limiter
/detector
includes
three stages
of
I-F
amplification; quadrature
FM
-detector,
audio preamplifier, and signal level metering output. The recovered
audio output is applied
to a discrete
audio buffer amplifier. This amplifier
provides
a
low
impedance source to
drive circuitry in
the
power
control section.
Power Control Circuitry
The power control circuit provides
the
following
circuits:
O
RE
Power Leveling Circuit
©
Power Cutback Circuit
O
Transniitter Shut-down Circuit
Refer
to
Figure
1-28
for a functional block diagram of
the
power control circuitry.
1-56
68P81092E02 3/19/94