MC44BC375U Datasheet, PDF (9/16 Pages) Freescale Semiconductor, Inc – PLL Tuned VHF (Channel 3 / 4)Audio / Video Modulator

Table 9. Performance Measurement Test Set-Ups (continued)
Device and Signals Set-Up
Measurement Set-Up
Chroma/Sound Intermodulation
No audio signal
Video: 700 mV_(pp) 100 kHz sinusoidal 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
Frequency
Frequency
4.4¹3^00kM^HzHz
700 mVpkpk
700mV pk-pk
Chroma
carrier
Chroma/Sound
Intermod.
Sound
carrier
No video signal
No audio signal
Fo +1.07 MHz
+4.43 MHz +5.5 MHz
Picture Carrier Harmonics
Measure in dBc, in reference to picture carrier (RFout_Ref), second and third
harmonic of channel frequency, resulting in the following spectrum.
Picture carrier
2nd harmonic
3rd harmonic
No video signal
No audio signal
Fo
2Fo
3Fo
Out of Band Spurious
Measure in dBµV 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 1.0 GHz.
Picture carrier
Spurious
Fo/4
Fo/2 Fo*3/4 Fo
Fo*3/2
In Band Spurious / 4 MHz Crystal Spurious
No video signal
No audio signal
Measure in dBc, in reference to picture carrier (RFout_Ref), spurious levels
falling into video bandwidth Fo+/-5.0 MHz (15.125 KHz & 31.25 KHz from
reference dividers and 4 MHz from crystal).
Video Bandwidth
No audio
The Video signal is demodulated on the spectrum analyzer, and the peak level
Video: 600 mV_(pp) sinusoidal signal inserted ^{of the 100 KHz signal is measured as a reference. The frequency is then swept}
on the black level of active video area.
from 100 KHz to 5.0 MHz, and then the difference in dBc from the 100 KHz
reference level is measured.
Application Specific Products
Freescale Semiconductor
MC44BC375U
9