Amphony 1200 User Manual
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2.4 GHz Digital Audio Receiver/ Amplifier Model 1200
Product Specification
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Features
· 200 W Output Power
· Digital (class D) amplifier
· 94 dB Dynamic Range
· 90 % power efficiency
· Avoids quality losses due to audio
compression
· 128 times digital interpolation filter stage and
analog filter stage
· Range of up to 300 ft (line of sight)
· Avoids reception errors by employing
½ rate forward error correction
· Mute Function
· No switch-on/ switch-off plops
· Short-circuit Safe Output
General Description
The Model 1200 receiver/ amplifier will receive
a digital audio signal that is being transmitted in
the 2.4 GHz range by either the Model 1000 or
Model 2000 transmitter. The recovered audio
signal will pass a digital as well as an analog
filter stage to eliminate out-of-band components
and is amplified to the maximum output power
of 200 W to drive a speaker unit.
By receiving the signal in a digital format, noise
and quality losses that are inherent with
conventional analog systems are avoided.
The Model 1200 receiver/ amplifier will apply
forward error correction to the received signal in
order to maximize reception robustness.
The amplifier is a digital (class D) amplifier. The
typical power efficiency is 90 %.
· Only one supply voltage required
· Power-Down Feature
Applications
· Wireless home theater systems
· Wireless hi-fi stereo speaker systems
The Model 1200 receiver/ amplifier will enter a
Power-Down Mode if no valid signal is received.
It will return to active mode when a valid signal
is detected.
ã 2000 Amphon
January2000 1
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2.4 GHz Digital Audio Receiver/ Amplifier Model 1200
Reference Data (Preliminary)
PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
OVERALL PERFORMANCE
Dynamic range A-weighted 89 94 dB
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Output power
THD = 10%, 8 W,
V
=60V
P
THD = 0.5%, 8 W,
=60V
V
P
200 W
150 W
Non-repetitive peak output current tbf A
Repetitive peak output current tbf A
Total harmonic distortion PO=1W 0.1 0.3 %
Low frequency roll-off tbf Hz
High frequency roll-off tbf kHz
Noise output voltage
RS = 0, Note 1 140 280
RS = 10 kW,Note1
140
mV
mV
Supply voltage ripple rejection 66 dB
Reception range
line of sight,
200 ft
Note 2
through obstructions,
60 ft
Note 2
line of sight,
100 m
Note 3
through obstructions,
30 m
Note 3
DC POWER CHARACTERISTICS
DC supply voltage 30 50 60 V
Power consumption
Peak output power 4 A
Quiescent current 230 mA
Power-down mode 165 mA
Notes:
1) Noise output voltage measured in a bandwidth of 20 Hz to 20 kHz
2) When used in conjunction with a Model 1000 or Model 2000 transmitter, American model
3) When used in conjunction with a Model 1000 or Model 2000 transmitter, European model
ã 2000 Amphon
January2000 2
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