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Main / Multistandard converters, ... / PMFD-3312
| PMFD-3312 series multistandard decoders/synchronizers/ADC |
PROFLEX™ PMFD-3312 series multistandard decoders/synchronizers/ADC accept SDI/YUV/RGB/PAL/SECAM/YC (625/50) video to convert into SDI/YUV and PAL (625/50). PMFD-3312NR features the noise reduction capability. PMFD-3312 module occupies two slots in a PROFLEX™ rack.
Features
- 10-bits sampling
- synchronizer (optional)
- user-configurable LUMA, CHROMA and black level presets for composite input signals
- user-configurable H- and V-timing presets with 37ns and 1H steps respectively
- built-in VITS and color bar generators
- noise reducer (optional):
- three-frames motion detector
- adaptive recursive filter
- adaptive 1H filter
- automatic noise suppression coefficient with manual override capability
- median filter to remove noise spikes
- optional 4.43MHz notch filter
PMFD-3312 simplified schematics
Technical specifications
Inputs:
- SDI input parameters:
-
| standard compliance |
ITU-R 656 D1 (270Mbps) |
| input impedance |
75 Ohm |
| return loss |
better than 15dB at 270MHz |
| signal amplitude |
800±80mV |
| cable equalization |
automatic, up to 300 meters of Belden or similar |
- CCVS1/Y/G input parameters:
- signal amplitude: 1V at 75 Ohm
- Y and G signals should include the synchronisation waveforms
- CCVS2/Pb/B/C input parameters:
- CCVS or B signal amplitude: 1V at 75 Ohm
- Pb signal amplitude: 525mV at 75 Ohm
- C signal amplitude: 670mV at 75 Ohm
- Pr/R input parameters:
- Pr signal amplitude: 525mV at 75 Ohm
- R signal amplitude: 1V at 75 Ohm
- REF input:
- high impedance, enabled via the X6 jumper setting (GLOB REF or EXT REF)
Outputs:
- four outputs: Y/SDI, Pr/SDI, Pb/SDI and PAL
- SDI output parameters:
-
| standard compliance |
ITU-R 656 D1 (270Mbps) |
| output impedance |
75 Ohm |
| return loss |
better than 15dB at 270MHz |
| signal amplitude |
800±80mV |
| jitter |
less than 700ps |
- PAL output mode:
- signal amplitude: 1V at 75 Ohm
- YUV output mode:
- Y signal amplitude: 1V at 75 Ohm
- Pr and Pb signals amplitude: 525mV at 75 Ohm
Converter characteristics
PAL/SECAM comb-filter decoding:
| ADC |
10-bits at 27 MHz |
LUMA frequency response |
| SECAM |
2.2MHz |
2.9MHz |
3.9~4.7MHz |
5.8MHz |
-0.3dB |
less than -3dB |
better than -40dB |
-1.5dB |
| PAL |
0.5dB up to 5.8MHz |
| return loss |
better than 40dB at 4.43MHz |
| diff phase |
less than 0.2° |
| diff gain |
less than 0.2% |
| SNR, weighted |
better than 65dB |
| field tilt |
less than 0.5% |
| 2T K-factor |
less than 0.5% |
SDI signal contents quality is not affected by decoding operation.
Encoding
PAL/SECAM/YC encoding is performed with 12-bits precision. Encoder's characteristics are ITU-R BT.601.5 and GOST-7845-92 compliant
PAL mode:
- chrominance error: less than 2%
- LUMA to CHROMA skew: less than 30ns
- two modes of PAL subcarrier generation:
- ITU-R BT.470-2 compliant autonomous generation
- external REF driven color synchronisation
General description
PMFD-3312 series multistandard decoders/synchronizers/ADC fits into the PROFLEX rack, it's frontal panel hosts all the module's controls:
Controls
- MODE - selects a menu entry for editing
- DOWN/UP – edit a currently selected parameter
The simultaneous depression of the UP and DOWN buttons resets a selected parameter to it's default value
- FREEZE – frame freeze ON/OFF, available only when the synchronizer is enabled
Indicators
Two LEDs on the frontal edge of the board:
- INP - input signal presence indicator
- REF – reference signal presence indicator (if the synchroniser is enabled)
The main indicators panel:
- INP – lit when input mode is being selected
- OUT – lit when output mode is being selected
- BLCK – lit when the black level is being preset for the composite video. The ±70mV offset is represented as ±99 units
- CHR – lit when the chrominance amplitude is being preset for the composite video. The +5/-13dB range is represented as ±99 units
- GAIN – lit when the luminance amplitude is being preset for the composite video. The +1.8/-2.5dB range is represented as ±32 units
- TIME H and TIME V – LEDs lit when the horizontal (± 32µs) or vertical (±99 TV lines) timing relative to the REF is being preset (if the synchroniser is enabled)
- SC – lit when PAL/YC color subcarrier phase is being adjusted. Additionally, when the S1.6 switch is ON the output line sync pulse position is adjusted (within -7/+8 steps of 74ns), when S1.5 switch is ON output line blanking pulse position is adjusted (within -7/+8 steps of 74ns)
- VBI – lit when the VBI contents (VITS, VITC, Teletext, etc) pass-through mode is being preset:
- PAS – VBI contents pass-through is enabled (main input to main output)
- BLA – VBI contents is blanked
- REF – VBI contents is restored from the REF input signal
- VITS – lit when the built-in VITS generator is enabled, lines 17, 18, 330 and 331
- TEST – lit when the built-in test-pattern generator is being preset:
- oFF – disabled
- brh – vertical color bars ON
- bru – horizontal colo bars ON
- L 1, L 2, L 3, L 4 – corresponds to the test-pattern I , II , III and IV of VITS being inserted into the active lines
- NR GRADE – lit when the noise reduction coefficient is being preset. OFF(noise reducer disabled) up to 7 (best effort) (available in -NR index model only)
- HALF – lit when low-pass filters are enabled/disabled to halve the bandwidth (luminance to 3.4MHz, chrominance to 1.7MHz) (available in -NR index model only)
- NOTCH – lit when the 4.43MHz notch filter is enabled/disabled in the luminance channel (available in -NR index model only)
- MEDIAN – lit when the median filter is enabled/disabled (available in -NR index model only)
The remote control and management from a PC
All the “PROFLEX” modules are remote controllable from a PC. This facility is available if a rack is fitted with a CPU module (ordered separately).
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