The NL-104A AC Preamplifier is a low noise, high input impedance, differential, preamplifier. It can be used alone for making recordings from low resistance (gross) electrodes, or with the NL-100AK headstage for microelectrode recordings.
The NL-104A features a wide dynamic balance adjustment for asymmetrical inputs (useful for balancing interference and shock artifacts), a choice of two input time constants, 8 gain ranges and 3 high frequency filter settings. An internal 50 Hz oscillator is provided for precisely balancing the input (input switch in the CM position).
|Gain||100, 200, 500, 1 k, 2 k, 5 k, 10 k or 20 k|
|Input Resistance||10 MO|
|High Frequency Cutoff||Selectable for 100 Hz, 700 Hz, 6 kHz or W.B. (> 40 kHz)|
|Low Frequency Cutoff||0.1 Hz or 10 Hz|
|Common Mode Rejection||10,000:1 at 50 Hz|
|Rejection Ratio Input Noise||< 10 µV (peak to peak) with inputs shorted to ground and bandwidth of 0.1 Hz to 10 kHz|
|Dynamic Balance Adjustment||Gain for one input can be varied ±50% with respect to other|
|Output Voltage Range||± 12 V max.|