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20

Freescale Semiconductor

MC44CC373

In Band Spurious

No Video signal

No Audio signal

Measure in dBc, in reference to picture carrier (RFout_Ref), spurious levels

falling into video bandwidth starting from

±100 kHz from the picture carrier up

to

±5MHz.

Video Bandwidth

No audio

on the black level of active video area.

The Video signal is demodulated on the spectrum analyzer, and the peak level

of the 100 kHz signal is measured as a reference. The frequency is then swept

from 100 kHz to 5 MHz, and then the difference in dB from the 100 kHz

reference level is measured.

Weighted Video Signal to Noise

No Audio signal

This is measured using a Demodulator in B/G

(using a CCIR Rec. 567 weighting network,

100 kHz to 5 MHz band with sound trap and

envelope detection, and a Video Analyzer.

The Video Analyzer measures the ratio between the amplitude of the active

area of the video signal (700mV) and the noise level in Vrms on a video black

level which is show below.

Video S/N is calculated as 20 x log(700 /N) in dB.

Unweighted Video Signal to Noise

Same as above with CCIR filter disabled.

Same as above.

Video Differential Phase

No Audio signal

This is measured using a Demodulator in B/G

(using a CCIR Rec. 567 weighting network,

100 kHz to 5 MHz band with sound trap, and

envelope detection, and a Analyzer.

On line CCIR 330, the video analyzer DP measure consists of calculating the

difference of the Chroma phase at the black level and the different chroma

subcarrier phase angles at each step of the greyscale. The largest positive or

negative difference indicates the distortion.

The video analyzer method takes the worst step from the first 4 steps.

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

Device and Signals Set-up

Measurement Set-up

N

DIFF PHASE =

* 100%

the phase at position 0

the largest positive or negative difference