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The SPA-435 is a device for checking the timing of SDI compared to an analog reference. In today's market it can be difficult to determine the horizontal and vertical timing of SDI streams without expense test equipment. Timing particularly the vertical phase can cause glitches in the video when switching from one source to another. This device can be used to accurately determine the timing of the HD and SD SDI sources.
The SPA-435 automatically detects the SDI input format and automatically detects the format of the reference input. It compares the input SDI timing to the input reference and displays the timing difference. The timing display for vertical is in lines and the timing display for horizontal is in pixels. The timing display will always be on the front panel and the user can choose via menu option or GPI remote to have the timing overlaid into the SDI output.
The SPA-435's reference format can be NTSC, PAL, 720P, 1080I and 1080P. The SDI format can be NTSC, PAL, (SMPTE 259 M) 720P, 1080I and 1080P (SMPTE 292 M). The LED's in the two front panel buttons will indicate if the inputs are locked (green) or not locked (red). The reference and SDI format do not have to match but if they are not gen-locked to each other the horizontal and vertical timing counters will just keep scrolling.
The SPA-435's design, performance and reliability are reflected in the New-Generation of Link Electronics products. Simple user interfaces with enter button, escape button and a rotary knob are used for menu navigation. The 20x2 Vacuum Fluorescent Display shows the Vertical and Horizontal phase. The SPA-435 is the first of Link Electronics Chameleon Series. The Chameleon Series will be able to change from one product to another just by downloading and installing the appropriate software, just like a Chameleon changes color.