Description Frequency Devices’ ASC-50, is a laboratory bench-top programmable instrument that combines familiar analog signal input and output with the power and flexibility of DSP. The ASC-50 provides the user with finger-tip control of filter type, (low-pass, high-pass, band-pass, and band-reject), operating frequency, pole/bandwidth configuration, pre and post gain settings, and analog/DSP filter functions - including many not available through conventional analog techniques. All are accessible at the touch of a button. With a frequency range from 0.1Hz to 30kHz combined with amplitude response of Butterworth, Chebychev, elliptic and finite-impulse-response (FIR) filter functions, the ASC-50 offers wide tuning flexibility without the need for pre-defined programming. An analog instrumentation interface provides input gain; DC offset control and variable output gain along with selectable single-ended and differential inputs to accommodate a variety of driving signals. Additionally, input DC-offset control is provided with expanded resolution. With the exception of filter and frequency changes all parameters of the ASC-50 can be altered on the fly without halting signal flow. Real-time bypass and gain-control facilitate test comparisons with and without the filter activated. A four button touch-pad coupled with a liquid-crystal display (LCD) affords the user complete control of various signal conditioning functions. Through the LCD, the operator is prompted by a selection of several filter types, functions, frequency and gain settings. Less than optimum selections are indicated, providing guidance without regimentation. Saturation (over-range) conditions are indicated on both the input and output permitting ease of system setup and use. Features/Benefits: Wide variety of filter types, functions and frequencies Precise, stable filter performance Adjustable gain and attenuation DC offset control Choice of single or differential inputs Special DSP bypass Analog and DSP clip indicators Filter performance display   Available Operating Modes Mode 1   Field 1 Filter type   Field 2 Filter function   Field 3 Number of poles or pole-pairs   Field 4 Q/Bandwidth   Field 5 Active/Bypass   Field 5 Corner frequency Mode 2   Field 1 Pre-gain control   Field 2 Post-gain control Mode 3   Field 1 Single/Differential control   Field 2 Input DC offset control Mode 4   Field 1 Shape factor/ Transition band   Field 2 Stop-band bandwidth     Filter Types:     Available Low-Pass, High-Pass Transfer Functions Low-pass (LP)   ANALOG       High-pass (HP)   Butterworth Chebychev (0.1dB Ripple) Elliptic-60 dB (0.1dB Ripple) Elliptic-80 dB (0.1dB Ripple)       Band-pass (BP)   DIGITAL       Band-reject (BR)   FIR-40 dB FIR-60 dB FIR-80 dB       Filter Functions:             Butterworth (Buttr)   Available Band-Pass, Band-Reject Transfer Functions Chebyshev (Cheby)   ANALOG       Elliptic-60dB (Ell60)   Butterworth 3,4 Pole-Pair   Q = 2,5,10,20 Elliptic-80dB (Ell80)   Chebychev (0.1dB Ripple) 3,4 Pole-Pair   Q = 2,5,10,20 FIR-40dB (FIR40)   Elliptic-60 dB (0.1dB Ripple) 3,4 Pole-Pair   Q = 2,5,10,20 FIR-60dB (FIR60)   Elliptic-80 dB (0.1dB Ripple) 3,4 Pole-Pair   Q = 2,5,10,20 FIR-80dB (FIR80)   DIGITAL             FIR-40 dB FIR-60 dB FIR-80 dB BW1,BW2,BW3,BW4 BW1,BW2,BW3,BW4 BW1,BW2,BW3,BW4   Gain Control:             PRE - Analog pre-gain range 0 to +36dB in 6dB steps POST - Digital post-gain range -48dB to +42dB in 6dB steps. DC Offset Control:             Input DC offset range ± 5 Volts       Over-Range Indication:           Analog saturation, clipping detection (Ü CLIP) Digital saturation, clipping detection (CLIP Þ)                       Specifications (@ 25°C and rated power Input) Input Characteristics Input Impedance: 1MΩ || 47pF to analog ground (each input) Input Configuration Single Ended or Differential Analog Clipping Indicator Threshold ±10V DC Offset ±5V DC Analog Pre-Gain Range 0 to +36 dB (6 dB steps) Common Mode Rejection Ratio : >60 dB @ 1 kHz Output Characteristics Output Impedance: < 1 W Output Configuration Single ended Digital Clipping Indicator Threshold ± Full scale (Digital to analog converter) Digital Post-Gain Range -48 dB to +42 dB (6 dB steps) Linear Signal Level ±10V Peak (7.07Vrms) max. Safe Signal Level ±60V Peak max. Total Harmonic Distortion -70 dBV typ. @ 7.07Vrms 1 kHz (Bypass condition 30 kHz BW) Noise -90 dBV typ. input grounded (Bypass condition 30 kHz BW)   We hope the information given here will be helpful. The information is based on data and our best knowledge, and we consider the information to be true and accurate. Please read all statements, recommendations or suggestions herein in conjunction with our conditions of sale which apply to all goods supplied by us. We assume no responsibility for the use of these statements, recommendations or suggestions, nor do we intend them as a recommendation for any use which would infringe any patent or copyright.