Link electronic IEC-835 manual Features, ‹ SC/H Phase, ‹ H. Timing, ‹ Burst Amplitude, Sc/H

800 SERIES

LINK ELECTRONICS, INC.

SYSTEM TIMING AND SC PHASE INSTRUMENT MODEL IEC-835

MADE IN THE USA

PhaseIcon Instrument

MODEL IEC-835

		FEATURES
		‹ SC/H Phase
		‹ H. Timing
	SC/H	‹ Burst Amplitude		Timing & SC Phase
		‹ Easy to Operate
The IEC-835 Phaselcon measures the subcarrier to			Although the primary function of the Phaselcon is
horizontal condition of any composite NTSC video			SC/H certification, it does system timing and burst
signal and displays the results on any standard			amplitude as well. Timing of two video sources is
monitor. This measurement system also greatly			accomplished by adjusting the source timing until the
decreases the time involved in extremely precise			two vertical lines on the left side of the display are
system timing. The information shown on the video			superimposed. As the source timing approaches 200
monitor is horizontal timing and subcarrier phase.			nS, the vertical line is moved to the right side of the
The visual display of the Phaselcon is keyed over the			display to increase the accuracy of the
selected input. The Phaselcon displays the graphics			measurement. SC/H is accomplished by adjusting
for SC/H in the lower ½ of the video display.			the source subcarrier for a match of the two sine
			waves. Each source to be matched should be
In the certify mode of operation, a sine wave is			switched into the compare input of the Phaselcon
displayed that represents one cycle of subcarrier. A			and calibrated until all sources in the system are
vertical line represents the leading edge of sync			timed and phased.
relative to subcarrier phase. In the compare mode of			The shadow mode of operation reduces the video
operation, the certify and compare signals are
displayed. An additional vertical mark is displayed on			level behind the sine wave graphics. This area is
the left side of the display that shows relative			calibrated to represent 40 IRE units for accurate
differences in horizontal timing between the two			burst level adjustment. The single sine wave signal
composite signals. When H phasing reaches 200 nS			should just touch the top and bottom area of the
the vertical line appears on the right for accurate			shadow signal. By comparing all video sources in the
timing.			system, a perfect burst match can be obtained.

LINK ELECTRONICS, INC. ‹ 2137 Rust Avenue ‹ Cape Girardeau, MO 63703-7668

Phone 573 334 4433 ‹ FAX 573 334 9255