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Audio Time Manager technical details and specifications

Power Input   ATM comes with an external AC to DC power supply module. In an emergency, you can replace the power supply with a 12V DC source of at least 2.2 amps, center positive; the negative (sleeve) is tied internally to ATM's ground. ATM is built for continuous operation, and there is no power switch.

Network   ATM connects to a standard 10/100Base-T network connection. This port is used for Axia Livewire™, synchronization to a network time server, and secure remote control via a web browser. If connected to the Internet, it should be behind a hardware firewall.

RS-232   This DB9 jack is used for serial remote control, and configured as a computer DTE port similar to the Comm 1 jack on most PCs. ATM communicates at 9600 baud, no parity, 8 bits, 1 stop bit, no flow control (usually referred to as "9600N81"). If you want to control it from a computer or dumb terminal, you'll need a null modem or a cable that reverses pins 2 and 3, pins 4 and 6, and pins 7 and 8. A simple command language is documented in the ATM manual.

Analog Inputs and Outputs   Stereo inputs are electronically balanced XLR females, pin 2 hot, with a load of 20kΩ: this makes it compatible with all modern electronically-balanced outputs. If fed from a transformer-balanced output, we recommend bridging a 680Ω resistor between pins 2 and 3 recommended. Outputs are electronically balanced XLR males, pin 2 hot, designed to feed a load of 600Ω or greater. Input and output sensitivity default levels can be set from the front panel, and can range between +20dBu and -10dBu.

Digital Inputs and Outputs   When set to AES/EBU via the configuration menu, this input conforms to IEC 958 Professional (5v p-p, 110Ω balanced) on XLR connectors. When set to s/pdif, the voltage and impedance switches to IEC 958 Consumer (.5v p-p, 75Ω unbalanced): connect signal to pin 2 and shield to pins 1 and 3. Digital output (selectable AES or s/pdif) is always active, regardless of whether you are using analog or digital inputs. ATM will lock to any valid 32 kHz, 44.1 kHz, or 48 kHz signal at the digital input connector, even if you have selected analog for the input. In that case, the digital input controls ATM's internal sample rate. If ATM is not connected to a digital input, it uses its own high-reliability 44.1 kHz sample clock

GPIO   Eight parallel control inputs and eight parallel control outputs appear on a DB-25 connector. Input and output functions are assigned through a configuration menu on the front panel. Inputs and outputs are opto-isolated for easy interface to other equipment. A +5v supply and ground are also brought out to the DB-25 for simple remote controls using pushbuttons and LED status readouts. The +5v supply can carry 200 mA, more than adequate for 8 LEDs and 8 logic inputs. It is protected by an internal, self-resetting thermal circuit breaker.

Studio installation   ATM can be inserted anywhere in an analog or digital signal path where you want to control program timing and duration. But for maximum flexibility and efficiency, we recommend using a routing switcher (in many cases, this router already exists in your facility). Have every source you'd want to time-control (such as remotes and network feeds) connected to an input, and at least one output for ATM and one for monitoring. Connect ATM's output directly to a console input channel, or back through another router input.

Detailed Specifications

Audio:S/N ≥ 84 dBA with 10 dB headroom (≥94 dB dynamic range); THD @1 kHz < .01%; IMD (IHF) < .01%; Frequency response ± 0.5 dB, 20 Hz – 20 kHz, measured analog input to analog output.

Dimensions: Chassis: 2RU (rack units); 19" x 12.5" x 3.5" (480 x 320 x 85mm). Power supply module: 5" x 2.5" x 1.5" (118 x 60 x 33mm)

Weight: Chassis: 7.5 lbs (3.5kg), Power supply module: 0.75 lb (0.35kg).

Power: 12 VDC @1.8A typical. 2.2A capacity recommended. Supplied with 100-240 VAC high-efficiency, self adjusting regulated supply, typical consumption 32 VA. The supply is UL approved and CE marked.