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Main / SDI embedders and deembedders / PEXT-3118
| PEXT-3118 SDI audio deembedders with PAL monitor output |
PROFLEX™ PEXT-3118 series SDI deembedders accept the SD SDI stream to deembed up to four audio channels from it.
The PEXT-3118 module occupies one slot in the PROLFEX 1U/3U racks so that up to four deembedders fit into a 1U rack and up to fifteen into a 3U rack.
The output audio signal may be in any standard: an analog, AES or combination of both. These modificatiuons are designated the following model indexes:
- four analog balanced outputs (24-bits DAC) – the "AA" index, (f.e. PEXT-3118-4AA)
- two analog balanced outputs and one balanced AES/EBU output (4 channels in total) – the "AE" index, (f.e. PEXT-3118-4AE)
- two balanced AES/EBU outputs (4 channels) – the "EE" index, (f.e. PEXT-3118-4EE)
The PEXT-3118 deembedders are featuring PAL monitoring output with the OSD of the bar-graph audio level meters (quasi-peak and VU).
PEXT-3118 rear panel:
PEXT-3118 simplified schematic diagram:
PEXT-3118 accepts SD SDI input signals. SDI input is equalized, decoded into a 10-bits 4:2:2 stream which is processed by a video/audio processor.
The video/audio processor deembedds the audio data streams. Output audio may be an analog ("AA" model index), digital AES/EBU ("EE" model index) or combination of both formats ("AE" model index).
Features:
- SD SDI compliance
- automatic cable equalizer on SDI input
- built-in 1kHz test generator
- signal loss indicator
- EDH/CRC status indicators
- automatic detection and indication of an embedded audio in the input SDI signal
- audio group selection for deembedding
- audio channel mapping and/or remapping
- presettable audio gain
- bargraph audio level meter (quazi-peak and UV) OSD on HDMI monitor output
- compatibility with a single-signal, WDM and CWDM optical systems
- an analog, AES/EBU or combination of audio outputs
- 24-bits audio DAC
Technical specifications
- Inputs
- SDI
| Standard compliance |
ITU-R BT.656 |
| Input impedance, connector |
75 Ohm, BNC |
| return loss |
better than 18dB at 270MHz |
| Automatic cable equalization |
up to 100m (8281or similar) |
- Outputs
- SDI
| Standard compliance |
as per input, ITU-R BT.656, reclocked |
| output impedance, connector |
75 Ohm, BNC |
| return loss |
better than 18dB at 270MHz |
| amplitude |
800mV±10% |
| jitter |
less than 500ps |
- Analog AUDIO
| Connector |
DB-15 |
| output impedance |
less than 50 Ohm |
| output type |
balanced |
| 0 dB FS level |
+18dB |
| Dynamic range |
better than 100dB |
| DAC |
24-bits at 48kHz, genlocked to video |
| Harmonic distortions and noise |
less than 0,006% |
| audio gain presets |
±6dB with 0.2dB steps |
- AES/EBU
| output type |
transformer balanced |
| Connector type |
DB-15 |
| Amplitude |
3.0V at 110 Ohm |
| audio gain presets |
±6dB |
- PAL monitor
| connector type, output impedance |
BNC, 75 Ohm |
| amplitude |
1V±2% at 75 Ohm |
| video DAC |
10-bit |
| frequency response ripple |
less than 3dB up to 5.5MHz |
| color error |
less than 3% |
PEXT-3118 controls and indicators:
The MODE button toggles through all the modes, the UP and DOWN buttons edit them. The CH.SEL button selects an audio channel to make presets with.
- ASSIGN - audio channel outputs mapping
- SWAP - "LEFT" and "RIGHT" channels swap
- TON - the built-in 1kHz test tone generator ON/OFF
- GAIN - the audio gain presets in a selected stereo pair or AES signal
- GROUP SEL - a group number select for deembedding
- VU METR - the VU-meter controls (ON/OFF, scale type, placement on the screen)
Status indicators:
- EDH MIN/HOUR - lit if two or more EDH errors were detected within one hour/minute interval
- SDI LOSS - lit when SDI input is lost
- AUD DET - lit when an input SDI has the embedded audio
- 1/2, 3/4 DETECT - lit when the selected group contains the respective audio channels
- AES REF - lit when an external AES reference signal is present and PEXT-3118 has genlocked on it
- GAIN MINUS - lit when the audio gain is in the negative dB range
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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