MC44C402ACR2 Freescale Semiconductor, MC44C402ACR2 Datasheet - Page 8

• Manufacturer Part Number: MC44C402ACR2
• Description: IC STEREO ENCODER MTS 32-LQFP
• Manufacturer: Freescale Semiconductor
• Type: Audio Encoderr

Specifications of MC44C402ACR2

• Applications: Set-Top Boxes, Video Players, Recorders
• Voltage - Supply, Analog: 2.97 V ~ 3.63 V
• Voltage - Supply, Digital: 1.62 V ~ 1.98 V
• Mounting Type: Surface Mount
• Package / Case: 32-LQFP
• For Use With: MC44C402EVK - KIT EVAL MC44C402 MTS ENCODER
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

SETTING LEVEL FOR MODULATOR/ENCODER
INTERFACE
1.
MC44C402
8
Verify calibration of the equipment. This requires a
modulator and precision signal source. The audio signal
cannot be passed through the stereo encoder for this
setup. Suggest using 10396.48 Hz audio test signal
directly into first Bessel null on a spectrum analyzer.
Audio Precision SYS2
0db / 25KHz deviation =
1.45Vp-p @ 1KHz Mono
(both channels driven)
Audio Generator
Audio Spectrum
Audio Analyzer
Analyzer
1) Calibrate MTS Decoder to Demodulator connection using Bess el Null Technique
2) input 1.8KHz 0.4 V p-p on left channel only and optimiz e stereo separation with
attenuator.
Adjust for optimal
separation with
only Left channel
driven 1800Hz
Precision MTS Decoder
Modulation Sciences SRD1
Spectrum Analyzer
Demoodulator
Precision
TEK 1450-1
44C402 Level Setup
Attenuator
Figure 8. MC44C402 Level Setup
Right In
Left In
No Audio Pre-emphasis
Stereo Encoder
Wide Band
Output
Modulator
Input Left Channel only
1800Hz 400 mV p-p
Demodulator / MTS Decoder Calibrat ion
@25KHz deviation gives bessel nul l and
2.
25KHz deviation Check = 1 0396 Hz
The null will occur at precisely 25 KHz deviation of the
10396.48 Hz audio test signal. Please see
test equipment setup.
Input 1800 Hz @ 0.4 V p-p into left channel and set
adjust attenuation between stereo encoder and the
modulator for optimum separation using calibrated
demodulator and decoder.
CVBS in
Composite Video
Notch Filter
Ref Level on SRD-1
4.5MHz
Composite Video
Freescale Semiconductor
Figure 8
for