Operating instructions

PRELIMINARY GUIDE TO INSTALLATION AND OPERATION
UVP-101i | 7
The UVP-101i detects the line format of the reference. A valid analog composite reference signal will turn on
the REF indicator located on the module’s front end. The reference signal must be NTSC for 60 Hz sources
(NTSC, 525) and PAL for 50 Hz sources (PAL, 625). If there exists a line format mismatch between the
reference input and the composite input, the REF indicator flashes, but the output format is forced to black
and set according to the reference.
When the external reference is present, the digital or the analog input can be asynchronous and will be
frame synchronized with the reference.
2.4.2 Analog Composite Video Input
When the reference is not present and the analog video input is selected, the UVP-101i locks its timing
according to the analog composite video input. The input video can be any composite video signal (SMTPE-
170M or ITU-624-4) or a B&W composite sync (no burst).
2.4.3 Digital Video Input
When the reference is not present and the digital video input is selected, the UVP-101i locks its timing
according to the digital video input.
2.5 Video Tracking Delay
The video tracking delay is a signal that specifies the current processing delay of the card. It indicates to the
audio processor card the amount of delay that must be added in the audio path to compensate for the video
processing delay and frame sync function to avoid lip sync problems. The signal value is calculated by the
UVP-101i, and is not user-adjustable.
The video tracking delay signal is sent from the UVP-101i to external audio processors via the two ABUS
connectors. A differential signal using the RS-422A transport protocol is also available on the RJ-45
connector on the back of the frame (see sect. 2.3.2). Detailed specifications for this signal are available in
Miranda’s “Video Processing Delay Signal” document number 212-02S00-110.