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Freescale Semiconductor

19

MC44CC373

Chroma/Sound Intermodulation

No audio signal

inserted on the black level of active video

area.This is generated using a Video

Generator and inserting the required

frequency from a RF Signal generator.

Measure in dBc, in reference to picture carrier (RFout_Ref), intermodulation

product at channel frequency plus the sound carrier frequency (+5.5 MHz)

minus the chroma frequency (

−4.43 MHz), resulting in the following spectrum.

Intermodulation product is at the channel frequency +1.07 MHz.

Picture Carrier Harmonics

No Video signal

No Audio signal

Measure in dBc, in reference to picture carrier (RFout_Ref), second and third

harmonic of channel frequency, resulting in the following spectrum.

Out of Band Spurious

No Video signal

No Audio signal

Measure in dB

μV spurious levels at 0.25, 0.5, 0.75 and 1.5 times channel

frequency, resulting in the following spectrum

Measure from 40 MHz to 1 GHz (Fo = 460 - 880 MHz)

.

Table 22. Performance Measurement Test Set-ups (continued)

Device and Signals Set-up

Measurement Set-up

Frequency

4.43 MHz

Picture carrier

Chroma/Sound

+1.07MHz

Fo

Intermod.

Sound

+4.43MHz +5.5MHz

carrier

Chroma

carrier

Picture carrier

3rd harmonic

3Fo

Fo

2Fo

2nd harmonic

Picture carrier

Fo*3/2

Fo/2

Fo/4

Fo*3/4

Fo

Spurious