1. WARRANTY EXPLANATION — PLEASE READ CAREFULLY Rane offers a limited warranty, described in full on the Limited Warranty card included in the packing materials, which covers both parts and labor necessary to repair any defects in the manufacturing of your Rane product.
II. FRONT PANEL DESCRIPTION 1. POWER SWITCH: Pressing the top half of this switch will cause the mechanism contained within to connect power to the circuitry of the unit causing it to operate (ON). Pressing the bottom half will snap the switch into the opposite operating mode (OFF). 2. BYPASS SWITCH: Pressing this momentary pushbutton toggles all of the outputs of the AD 13 between the active and bypass mode. Bypass is indicated on the LED display by an “OFF” indication. 3.
9. CHANNEL 2 OUTPUT LEVEL CONTROL: See channel 1 output level control immediately above. 10. CHANNEL 3 OUTPUT LEVEL CONTROL: See channel 1 output level control immediately above the item immediately above. 11. OUTPUT OVERLOAD INDICATORS: These red LEDs illuminate exactly 4 dB below the onset of clipping, should any of the respective output stages approach this sort of difficulty. 12.
III. REAR PANEL DESCRIPTION 1. 3-PIN INPUT CONNECTOR: This is a differential active balanced input, connected such that pin 2 is HOT, pin 3 is RETURN, and pin 1 is signal ground, NOT SHIELD GROUND. Shield ground should only be connected to the case of the connector. 2.
IV. DIGITAL AUDIO THEORY Now that most folks even remotely associated with the production and reproduction of sound own at least one digital audio device, be it a CD player, digital tape system, or any of several effects devices, most are at least remotely familiar with the fundamental principles of digital audio. In case the sermon has missed you somehow, here it is again. Digital Audio is the process of converting a time-varying electrical representation of an audio signal into a bunch of numbers.
V. FUNCTIONAL DESCRIPTION If you attempt to read this without first digesting the previous section covering digital audio theory you should be ashamed. Page numbers are included for a reason . . . . it gives one a certain sense of the order in which to read this manual. So, you have read the previous page and you’re ready to continue. Use the block diagram as a pictorial guide as we describe the signal path of the AD 13. It will help you a lot.
The branch in the road after the pre-emphasis leads to a dead end at the headroom meter, which must be attached after the pre-emphasis is applied to the input signal so that a visual indication of what is really being applied to the digital converter can be monitored. Up the other fork lies the sample and hold circuit. This clever trick provides the converter with a steady voltage during the conversion process.
VI. SYSTEM CONNECTION If you have already read the first two pages of this manual, the following will seem redundant. It is, however, of the utmost importance that the user totally comprehend the interconnect requirements of any piece of equipment. It is for this reason that the people at Rane don’t mind saying this twice. It can never be said too often. Failure to interconnect audio components properly is the number one leading cause of problems and nasty noises.
VII. OPERATING INSTRUCTIONS INITIAL POWER-UP Basic operational guidelines are straightforward. Once all circuit connections have been properly accomplished the system should be ready to power up. It is usually recommended that all signal processing be turned on before the amplifier is powered up to prevent unnecessary surprises. It is also wise to start with all of the level controls in their full CCW or “off” positions. This will further ensure that there are no unwanted glitches.
SETTING LEVELS Whether or not you have set the desired delays, you may, at any time, increase the input control to a comfortable level and any or all of the output controls. Since the AD 13 is normally going to function at the input of the amplifier, there should rarely be any need for anything but unity gain at either the input or the outputs. Always remember to take all the gain you will ever need right at the very input of a sound system, and not here and there down the chain.
VIII. SPECIFICATIONS TIME DELAY Range: 0 to 655ms Increment Size: 20µs or 1 ms throughout entire range Readout: 3 digit LED with autoranging decimal point. Accuracy: ±5% DATA CONVERTERS Conversion Rate: 50kHz oversampling Type: Linear pulse code modulation (PCM). (Philips CD data converters).