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Table 9. Performance Measurement Test Set-Ups (continued)
Device and Signals Set-Up
No video signal
No audio signal
Measurement Set-Up
Picture Carrier Harmonics
Measure in dBc, in reference to picture carrier (RFOUT), second and third
harmonic of channel frequency, resulting in the following spectrum.
Picture carrier
2nd harmonic
3rd harmonic
Fo
Out of Band Spurious
2Fo
3Fo
No video signal
No audio signal
Measure in dB μ V 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
No audio
Measure in dBc, in reference to picture carrier (RFOUT), spurious levels falling
into video bandwidth Fo ± 4.2 MHz (15.125 KHz & 31.25 KHz from reference
dividers and 4 MHz from crystal).
Video Bandwidth
The Video signal is demodulated on the spectrum analyzer, and the peak level
on the black level of active video area.
Video: 600 mV (pp) sinusoidal signal inserted of the 100 KHz signal is measured as a reference. The frequency is then swept
from 100 KHz to 4.2 MHz, and then the difference in dBc from the 100 KHz
reference level is measured.
Weighted Video Signal to Noise
Video: 100% White video signal — 1 Vpk-pk.
No audio signal
This is measured using a Demodulator using
a CCIR Rec. 567 weighting network, 100 KHz
The Video Analyzer measures the ratio between the amplitude of the active area
of the video signal (700 mV) and the noise level in Vrms on a video black level
which is shown below.
VideoS/N is calculated as 20 x log(700 /N) in dB.
to 4.2 MHz band with sound trap and
envelope detection, and a Video Analyzer.
N
noise level in Vrms
Unweighted Video Signal to Noise
Same as above with CCIR filter disabled.
Same as above.
MC44CC375AV
Digital Home
Freescale Semiconductor
9
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