Series PAL Format Electronic Television Modulators

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 programming the E225X and E235X modulator models.

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

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)