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PDF CXA3050 Data sheet ( Hoja de datos )
| Número de pieza | CXA3050 | |
| Descripción | NICAM and SMATV RF MODULATOR/PLL | |
| Fabricantes | Sony Corporation | |
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CXA3050M
NICAM and SMATV RF MODULATOR/PLL
Description
Fully synthesized I2C controlled UHF/VHF TV RF
Modulator compatible with PAL and NTSC video
formats.
24 pin SOP (Plastic)
Features
• Minimal adjustment of external components
• For use on VHF and UHF TV Frequencies
• Video RF carrier frequency programmable in 125kHz
steps
• Accepts NICAM 6.552MHz QPSK input signal
• Accepts FM Stereo input signal
• I2C control of:
a. Video RF Carrier Frequency
b. Sound Carrier Frequency
c. Modulation Depth (±2% Typ.)
d. FM Deviation (±8% Typ.)
e. P/S ratio (±1dB Typ.)
f. Nicam output enable to sleep
g. Video RF carrier enable to sleep
• On chip Regulator 3.1V
Block Diagram
Structure
Bipolar silicon monolithic IC
Applications
• PAL and NTSC System VCR
• Satellite Receiver
• Set Top Box
• SMATV
Recommended Operating Voltages (Ta = 25°C)
• Supply voltage
VCC 5.0 ± 0.5 V
• Supply for VCO Varactor
30 ± 0.5 V
• Operating Temperature
–10 to +80 °C
24 23 22 21 20 19 18 17 16 15 14 13
AMP
NICAM
MIXER
VIDEO
MIXER
AMP
AMP
VCO
PLL
W/C-CLAMP
REG
TPSG
FM-OSC PLL
OSC
PLL
I2C-Interface
1 2 3 4 5 6 7 8 9 10 11 12
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
–1–
E96331A66-ST
1 page  
CXA3050M
Software Application Notes
The minimum requirement to drive the CXA3050 and I2C bus drive is a 386/486 with 4M bytes hard disk
space, 16MHz clock speed and running DOS5.00 or above. Insert the disc into the drive and type TESTS and
at the prompt type iic. At this there should appear a single list of user friendly functional tests that can be
changed by keyboard manipulation. As an aid the test list is written below. Note Page up increments the
status, page down decrements the status.
Function
RF Output Power
Delta Sound
Fsound
Frequency mode
Mod depth
FM Deviation
P/S Ratio
Nicam on/off
Over Mod on/off
Nominal Status
Comments
1/0 Turns RF Amp, OSC on/off
1 Fine tune audio carrier
Course adjust for
4.5MHz (0)
0 5.5MHz (1)
6.0MHz (2)
6.5MHz (3)
2 to 8191
Check listing on page 10 for
frequency to hex conversation
4
Ranges mod depth from
72% to 86%, 80% (4)
4 Sensitivity adjustable
4 Programmable in 8 steps of 1dB
1/0 Nicam Mixer on
1/0 Increase Video modulation ratio
–5–
5 Page 
CXA3050M
Video Characteristics
Parameter
Input resistance
Input voltage
% Modulation Clipping
I2C control index
Modulation flatness
Modulation
Modulation stability by temperature
Field time distortion
Line time distortion
S/N
K Factor
Video frequency response
Condition
80% Modulation
7 steps
Band Limited (46CH to 60CH)
0.55p-p input (mod Adja)
mp (Ta = –10 to 80°C)
–mp (Ta = 25°C)
Weighted
With 2T pulse
Per standard
Min. Typ. Max. Unit
30 100
KΩ
0.55 Vp-p
97 %
2 ±0.4 %
±1.4 %
73 80 87 %
±3 %
0 0.5 2 IRE
0 0.5 2 IRE
–60 dB
2%
0 ±0.5 dB
Audio Characteristics
Parameter
Input voltage
Input resistance
Deviation range
Audio distribution
Deviation sensitivity
Audio SNR
Harmonic distortion
Frequency response
FM Hum and noise
Condition
Min. Typ. Max. Unit
@50kHz, Deviation
0.1
Vp-p
20 KΩ
±10 ±100 kHz
4.5MHz
0 ±15 %
System M
4.5MHz ± 25kHz = 100% = 0dB
0.5 kHz/mV
System B/G
5.5MHz ± 50kHz = 100% = 0dB
0.33 kHz/mV
System I
6MHz ± 50kHz = 100% = 0dB
0.404
kHz/mV
System D/K
6.5MHz ± 50kHz = 100% = 0dB
0.404
kHz/mV
Quasi-Parallel, Detection
–60 dB
50 to 100%, Deviation
1%
50 to 15kHz
–1 +1 dB
25 to 75kHz, Deviation
±5 kHz
– 11 –
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet CXA3050.PDF ] | |
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