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Summary of Contents for Analogue Tube AT-1
- Page 1 AT-1 Mono Limiter User Manual Serial No ________...
- Page 2 (if 2 are used) or inserted in a channel. The AT-1 has a few distinguishing features that set it apart from the AT-101 stereo units. Particularly the attenuator control as this is an original tapered step attenuator remade as it ∞...
- Page 3 Threshold Adjustments It is possible (with careful adjustment of the AC and DC threshold controls) that the AT-1 can be used in any compression or limiting situation. The DC threshold control is found at the rear of the unit marked *Thresh* Set the AC threshold control to zero and adjust the input gain control for unity.
- Page 4 6-9 kHz-boosted copy of the original signal into the side-chain i/p or external i/p input of the compressor. Finally the AT-1 has a full bypass function where the unit can be switched fully out of the signal chain during operation.
- Page 5 6386LPG tubes or the original 5 star GE version tubes if you are using them. Your new AT-1 limiter comes fitted with XLR connectors at the rear of the unit for In and OUT operation including the Ext Key i/p stage. EUK models are pin 2 hot whilst US models are pin 3 hot.
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Page 6: Specifications
SPECIFICATIONS Input impedance 600ohms Output impedance 600ohms Source impedance <4ohms Input level >28db before clipping Ext Key i/p line in Balanced Output level Output 27dbm before clipping Gain 18 db (no limiting) Frequency response 20hz to 20khz <1 db (Straight line amp) Thd+N vs Freq <70db @ 10khz Limiting noises... - Page 7 1 Ext i/p switch Provides a 2 balanced i/p and splits up the GR and AC threshold circuits within the AT-1 when active. 1 Time Constant Switches 6 positions each, so as to provide fixed and variable time constants for any type of Programme material.
- Page 8 Always switch unit OFF when not in use Always use the Peli 0370 flight case for transportation The AT-1 is very heavy around 20kgs, use 2 people when lifting or when fitting unit to a rack Temperature When installing the AT-1 Limiter, please ensure that adequate ventilation is available.
- Page 9 A 1U low noise 3 fan unit can be provided, These 19” rack units are operated at a ¼ of their fan speed and sit approximately ½ u above the unit. If the limiter is to be fitted into a free standing rack, It is recommended the limiter occupy it’s own space and not share it with other equipment it should have a vented 3U space directly below the unit and a vented 3U space above to include a fan rack.
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