HP 8591C User Manual

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Test Descriptions
Color Test Descriptions (Chromajluma Delay Inequality, Differential Gain, Differential Phase)
Chromalluma Delay
Inequality Test
Description
NOTE
The analyzer internal frequency calibration routine should be done at the temperature the test will be
performed for best accuracy
Non-standard timing between the 2T and 12.5T pulses will return values that
are offset by up to 25 ns. The ‘IT” in NTSC systems is 125 ns. A 2T pulse
has a half amplitude duration of 250 ns for NTSC; 12.5T pulse has a half
amplitude duration of 1.5625 ps.
The ‘chromakuna delay inequality test measures the time delay between the
low frequency luminance component and the high frequency chrominance
component of the 12.5T modulated pulse in the composite test signal. Refer
to Figure 8-14.
15:29:12 MAR 86. 1995
,$v CHRNNEL m (STO)
REF 26.46 I'J AT i0 dB
TV PACKET
OIF GAIN DIF PHASE : : :
LIN
REF
0.0e
-"a
i
2:
-0.3 2....
-1.30
DIFFERENTIAL GAIN =
Mm
,,,,,,,, DIFFERENTIAL PHASE -
SA UB
.- __
,(5th packet: NO) .,
0U.Y”” ll,lL
“lyl A-Y
S BW 300 kHz YUBW 3 MHz YSWP
MhIN
MENU
Figure g-14. Chrominance-to-Luminance Delay
8-35

HP 8591C Specifications

General

Brand	HP
Model	8591C
Category	Measuring Instruments
Language	English