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manual abstract
- SUN VALLEY, CA - MADE IN USA 148 Active Digital Audio Splitter 8x32 With the advent of digital audio consoles and recording devices the need often arises for a digital output to be sent to multiple digital inputs. But digital signals cannot be split as simply as analog audio signals. Trouble-free transmission of digital audio requires strict adherence to standards for input and output impedances as well as wiring. If the standards are not met the robustness of the system can diminish causing noise, drop outs or complete loss of signal. As the sampling rate increases, so does the possibility of failures. Changing the input impedance by wiring two or more inputs across one output simply does not work. There are many digital audio distribution amplifiers on the market. They can do many things such as reclocking, reshaping, matrixing, format conversion, etc. But when the need is only for splitting, especially for multiple channels, these other devices are prohibitively expensive, bulky and difficult to set up. The Model 148 was developed specifically for those applications in which the requirement is to feed the same digital audio signal to multiple inputs. It is clean, stable and extremely cost effective. Through the use of 15-pin D sub connectors the 1/2 rack unit can split 8 channels (4 pairs) of digital audio into 32 channels (16 pair). The D-Subs follow the standards used on the Model 1788 remote controlled mic preamplifier (see illustration above for the wiring diagram). The Model 148 can be mounted in a rack singly or in pairs with the Aphex Model 44-008SA rack kit. The Model 148 incorporates 20dB of saturated gain to square up the input signal. In many cases it can be used as a booster amplifier to restore a signal to full drive at the end of longer runs. The Model 148 can also be internally configured for either 110Q balanced or 75Q unbalanced operation. APHEX SYSTEMS Improving The Way The World Sounds Features 1 DB15 Input Connector 4 AES3 Stereo Inputs 4 DB15 Output Connectors 4 AES3 Stereo Outputs On Each No Setup Required Fully Automatic Signal Transfer Accepts S/PDIF and Pro Input Levels Sample Rates to 192kHz All I/O Transformer Isolated Low Jitter Low Cost 1/2 Rack Package Internal Power Supply High Reliability SPECIFICATIONS Inputs: Outputs: AES3 Jitter: Input Z: Output Z: Output Level: Transfer Gain: Power Supply: Power Requirements: Size: Net Weight: 4 Stereo Pro AES3 Transformer Balanced, DB15 Male 4x4 Stereo Pro AES3 Transformer Balanced, DB15 Female Less than 100 picoseconds 110fi or 750 (Internal Switch) 110fi Balanced (Special Order 75fi Unbalanced) AES3 (with Standard Z=110fi) S/PDIF (with Special Order Z=75fi) Automatic - .5VP-P to 5VP-P Input Generates Specified Output Internal, fused 100/120/240V- 50/60HZ - 5W 8.5 in. W x 1.75 in. H x 8 in. D 2lbS. C€ 59887 Aphex Systems Ltd. • 11068 Randall St., Sun Valley, CA 91352. Tel: (818) 767-2929 Fax: (818) 767-2641 Email: sales@aphex.com . Aphex and Compellor are registered trademarks. 148 cutsheet nofonts.indd 3/16/2004, 12:11 PM...