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E2251T Datasheet

PAL Format Electronic Television Modulators

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PRODUCT INFORMATION
E225x and E235x
Series PAL Format
Electronic Television
Modulators
APPLICATIONS:
Television/VCR
Satellite receivers
Multi-media adapters
Video signal converters
E2258T2 PACKAGAGE
RF Components
Group
FEATURES
• Power supply: 5 V
• Small Size: 44 mm × 44 mm × 17 mm
• Common Footprint
• Common Electrical Interface
• Standard pin-pitch between models
• I2C bus serial PLL control
• Same input connector locations between models
• Reduced component count
• High level of integration E2258T2 meets CENELEC emissions
requirements
DESCRIPTION
The E225x and E235x Series Modulators are new PAL format
modulators with the output frequency set by a PLL.
These modulators provide direct Phase-Locked Loop tuning in-
stead of the previous screwdriver setting, providing software flexibil-
ity over output channel control. The output may be tuned over the
PAL channel range of 21 ~ 69.
These two new modulator series retain the common modulator
mechanical footprint of previous designs. A variety of versions and
options are available, as shown in the table.
The PLL programming is provided by an I2C serial bus interface.
Modulation factors of 100% and 55% are available.
Test and evaluation software is available upon request for pro-
gramming the E225X and E235X modulator models.
E225-1
PROGRAMMABLE OPTIONS
• Output frequency
• Test Signal Generator (TSG) On/Off
• Test Modes On/Off
• Intercarrier spacing for output Mode – G/I/K (E2354T)
• Audio carrier level: -10 to -17 dB with respect to the Video
carrier (E2354T)
SELECTION GUIDE
MODEL
PAL
FORMAT
MODULATION
FACTOR
PLL SETS
E2251T G
100% Channel, TSG, RF On/Off
E2251TA G
55% Channel, TSG, RF On/Off
E2258TA G/I
55% Channel, TSG, RF On/Off
E2258T2 G/I
55% Channel, TSG, RF On/Off
E2354T G/I/K
100%
Channel, TSG, Format, Power
Save On/Off, Video/Audio Ratio
E2358T G/I
100% Channel, TSG, RF On/Off
Sharp Electrionic Components
Sharp Electrionic Components



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