GeckoFlex 8925EMB-U HD/SD Unbalanced Audio Embedder

The 8925EMB-U is a compact eight-channel HD/SD digital audio embedder (multiplexer) module. It provides three distributed SDI outputs with embedded audio and one output acting as an input reclocked loop-through. This module is ideal for building dense HD/SD and audio infrastructure for production and playout applications.

The module automatically detects the audio format, and Dolby E streams are also detected and passed transparently. The AES inputs can handle asynchronous audio and sampling rates from 32 kHz to 96 kHz, which are converted to synchronous 48 kHz embedded within the video stream. The 8925EMB-U is suitable for use where existing embedded audio needs to be combined with incoming embedded audio.

With its fiber-ready architecture, the 8925EMB-U can be configured to support up to two fiber inputs and two fiber outputs. With the fiber transmitter or transceiver option, it can take video from copper or fiber, embed audio, and transmit over fiber in one single slot. The receiver option makes it ideal for receiving incoming feeds from longer distances and locally embedding audio.

All parameters can be adjusted via standard HTML Web browsers or via the Newton™ Control Panel. In addition NetConfig™ and NetCentral™ can be used for remote configuration and signal health monitoring.

Key Features

Eight-channel (four stream) HD/SD digital audio embedder (multiplexer)
Four unbalanced AES inputs
Accepts asynchronous PCM audio
Supports Dolby E
Three HD/SD SDI outputs with embedded audio
Sample rate conversion accepts 32 kHz, 44.1 kHz, 48 kHz, or 96 kHz
Embeds 20 or 24 bits
Fiber-ready option for receiving or transmitting over fiber applications
Embedding audio into an HD-SDI stream
Embedding asynchronous PCM digital audio
Embedding audio channels and sending an HD-SDI signal over fiber

Application

Embedding audio into an HD-SDI stream
Embedding asynchronous PCM digital audio
Embedding audio channels and sending an HD-SDI signal over fiber

Specifications

Supported Frame Types
GeckoFlex with 8900NET (Net Card) for configuration

Power Rating
7.7 Watts – single slot

Video Inputs
HD/SD-SDI:

Input equalization: HD up to 125m, SD up to 330m
Auto-sensing: yes

Optical: Single-mode (optional)
Formats supported: 1080i @ 59.94, 50, 720p @ 59.94, 50, 480i @ 59.94, 576i @ 50, 1080p @ 23.98, 1080sF @ 23.98

Audio Inputs
AES: Four inputs
Signal type – unbalanced: AES-3id-2001
Common mode range: N/A
Sampling rate: 32, 44.1, 48 or 96 kHz
Resolution: 20- or 24-bit
Input return loss: > –25 dB (100 kHz to 12 MHz)
Input impedance: 75Ω
Connector type: BNC

Video Outputs
HD/SD-SDI: Four outputs

Return loss: >15 dB, 5 to 270 MHz; >15 dB typical, to 1.5 GHz
Signal level: SDI 800 mVp-p ±10%
Rise/fall time (20-80%): 140 ps typical for HD, 640 ps typical for SD
Output jitter, low jitter applied:
- < 0.2 UI HD > 100 kHz
- < 1.0 UI HD 10 Hz > 100 kHz
- < 0.2 UI SD > 1 kHz
- < 0.2 UI SD 10 Hz > 1 kHz

Optical: Single-mode (optional)

Electrical Length (delay)
SDI: HD input <450 ns, SD input <1.6 µs
PCM audio with SRC on (@48 kHz): HD input 3.4 ms, SD input 3.45 ms
Non-PCM audio or PCM with SRC off: HD input 0.17 ms, SD input 0.58_ms
Audio/video offset: Min. SD 40 µs / HD 62 µs

Embedding
Delete individual embedded audio group: Yes/no
Embedded audio stream: Silence, any incoming group or any audio input
Output audio resolution: 20-, 24-bit, or auto as input

Data Sheet