BKPF-L641 (BKPFL641)Discontinued

NTSC/PAL to 422 decoder board


The BKPF-L641 is a decoder board that converts an NTSC/PAL composite analog input signal into a 4:2:2 component serial digital video output signal. This decoder board features 10-bit digital internal processing, a three-line adaptive comb filter and a frame synchronizer. In conjunction with the BKPF-L642 4:2:2 to NTSC/PAL encoder board, the color frame ID Inserter function avoids the reverse color framing that may be generated by the encode/decode chain. It maintains the content of the VBI.
An internal test signal generator is included for maintenance purposes.
The BKPF-L Series function boards install in the PFV-L Series Interface Units in any combination with other BKPF-L Series function boards.
The total power consumption of the installed function boards should not exceed 13 A at 5 V for PFV-L10.


High performance NTSC/PAL decoder to component SDI
_10-bit 4:2:2 internal processing
- Supports SMPTE259M-C
- One equalized input with passive loop-through output
- Four distribution outputs
- Black burst reference input with passive loop-through output
3-line adaptive comb filter
NTSC/PAL selectable

Built-in frame synchronizer
- On (External Reference mode) / Off (Input Lock mode) selectable
- Auto/Manual freeze selectable (External reference mode only)
- H/V phase adjustment
Colour frame ID insertion
Maintains the content of the VBI to support Closed Caption
EDH insertion
Built-in test signal generator


Generic Specifications
Inputs and Outputs
Analog video input: Analog IN connector (BNC type) (1), 1.0 Vp-p, 75 Ohm, NTSC/PAL composite analogue video signal

Reference input: REF IN connector (BNC type) (1), 0.3 Vp-p ±10%, 75 Ohm, black burst signal

Analog video output: Passive loop-through output connector (BNC type) (1), 1.0 Vp-p, 75 Ohm, NTSC/PAL composite analog video signal

Serial digital output: SDI OUT connectors (BNC type) (4), 0.8 Vp-p, 75 Ohm., 525/625 component serial digital signal, conforming to SMPTE259M-C, 270 Mb/s

Reference output: Passive loop-through output connector (BNC type) (1)

Cable length: 200 m max. (with Belden 8281, Fujikura 5C2V or equivalent coaxial cable)

Channel coding: Scrambled NRZI

Digital output return loss: 15 dB or more (5 MHz to 270 MHz)
Video Characteristics
Quantization: 10 bits

Sampling frequency
: Input: 28.636 MHz (NTSC input), 35.468 MHz (PAL input)

: Output: 13.5 MHz (Y), 6.75 MHz (B-Y/R-Y)

Bandwidth: 5.75 MHz (Y)

K factor (2T pulse): 1% or less

Signal-to-noise ratio: 58 dB or more (using Flat Field)

Memory: 4 fields

Processing delay: 74 µs (NTSC)
137 µs (PAL)

Phase adjustment range: Line: -2 H, -1 H, ±0 H, +1 H
INPUT Lock mode: 0.1 to 9 µs, 37 ns step
External REF mode: -4.5 to +4.5 µs, 37 ns step
Power requirement: +5 V DC: 1.4A, (supplied from PFV-L Series Interface Unit)

Operating temperature: +5 °C to +40 °C (+41 °F to +104 °F)

Storage temperature: -20 °C to +60 °C (-4 °F to +140 °F)

Operating humidity: 10% to 90% (no condensation)

: Board 77 x 267 mm (3 1/8 x 10 3/4 inches) (h/w)
Connector panel 33 x 85 mm (1 5/16 x 3 3/8 inches) (w/h)

: Board Approx. 170 g (6 oz)
Connector panel Approx. 100 g (4 oz)
Supplied Accessories
Installation Guide (1)
Installation Manual (1)
Slot Number Label (1 set)