Grass Valley 8900FSS - Manual (Page 15)

8900FSS Instruction Manual 9
Functional Description
Low Pass Filter and H Sync Separator
In the lowpass filter the signal is filtered and the subcarrier is trapped to
prevent malfunctioning of the horizontal sync separator if a highly satu-
rated reference signal (other than black-burst) is used.
The sync separator works over a wide ±6 dB range and outputs a 50% sliced
composite signal with low APL (average picture level) jitter.
Standard Detector and Memory Controller
Upon power up, the host module’s microcontroller configures the on-
board FPGA (field programmable gate array) by loading the firmware and
the serial delay information according to the last stored user adjustments.
The user adjustable parameters are input through a multifunction rotary
switch and toggle switch combination interface that is part of the Host
module. All the functions are remote read/write-able through the serial
control interface.
Full-frame Memory
The submodule provides memory to hold a full frame of 525 or 625 video
with additional auxiliary data. It is configured to be fully transparent to the
4:2:2 component data stream with a minimum latency of 35 clock cycles.
Power Filtering
The input +5V and –5V is filtered in multiple stages to isolate noise from
the sensitive analog timing circuits and to minimize crosstalk and output
jitter.