Filters (NL125 / NL126)

Filters (NL125 / NL126)

These filter modules employ two active filter sections to control high and low pass characteristics.

  • Low frequency cutoff set continuously from 0.5 Hz to 5 kHz
    • Using single-turn potentiometer in four switched ranges
  • High frequency cutoff set continuously from 5 Hz to 50 kHz
    • Using single-turn potentiometer in four switched ranges

Item# Description U.S. List Price Quantity
65-0237 NL125 Filter (Low Cut, High Cut, and 50 Hz Notch)
65-0238 NL126 Filter (Low Cut, High Cut, and 60 Hz Notch)
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The NL125 and NL126 Filter modules employ two active filter sections to control high and low pass characteristics. The low frequency cutoff point can be set continuously from 0.5 Hz to 5 kHz with a single-turn potentiometer in four switched ranges. Similarly the high frequency cutoff can be set continuously from 5 Hz to 50 kHz in four switched ranges. DC and wide band switch positions by-pass the lower and upper filter sections respectively. An active notch filter is provided for the rejection of line frequency interference, set at the factory to 50 Hz (NL125) or 60 Hz (NL126), with a 20 Hz notch width (-3 dB points).

Specifications65-0238
Input Voltage Range ± 15 V (max.), > ± 10 V (operating)
Input Impedance 56 kO
Low Frequency Cutoff Range DC, 0.5 Hz to 5 kHz continuously
High Frequency Cutoff Range Wide band (> 50 kHz) and 5 Hz to 50 kHz, continuously adjustable
Gain Within Bandpass x1
Attenuation Beyond Cutoff 40 dB/decade
Notch Attenuation > 50 dB
Notch Width -3 dB points; 20 Hz
Output Voltage Range ± 10 V
Output Impedance 600 O