User manual

Imagestore User Manual Appendix 1
Miranda Technologies Ltd Page 209
Appendix 1
Imagestore specifications
SDI Inputs and Outputs
The Imagestore's SDI inputs accept serial digital video to EBU (Tech. 3267-
E) and SMPTE 259M standards, clocked at 270MHz, through screened BNC
connectors. There is a Return Loss greater than 15dB, over the range 5MHz
to 270MHz. Each input circuit is provided with automatic adaptive
equalisation circuitry suitable for cable lengths of up to 250 metres (typical
for Belden 8281 or equivalent coaxial cable).
Both SDI outputs are to the same data structure and physical standard as the
inputs and provide output amplitudes of 800mV (± 10%). Output circuits will
provide a signal whose transitions have a rise-time of between 0.4 and 1.2
nanoseconds. Each output is also fully equalised and regenerated.
Analogue Reference Video Input
Wherever possible, Imagestore should be configured so that reference timing
for synchronisation is taken from an analogue reference source to ensure
uninterrupted output in the absence of a background signal. Analogue signals
such as PAL (625), NTSC (525), or component video with embedded sync
are all suitable.
Analogue Preview Video Output
As an alternative to the standard SDI preview video output, the CPV-001
analogue composite video output option will provide a 1V peak-to-peak
analogue signal in either PAL or NTSC video format. The output is provided
on a 75Ω BNC connector.