The neutralized input capacitance allows fast rise time signals to be viewed with high microelectrode resistance's. The 2400A system preamplifier was designed to be used with both high and low impedance electrodes. No other additional amplification should ever be needed between the microelectrode and the recording instrumentation. A full complement of active filters means that frequency response can be tailored to provide maximum signal to noise ratio. The seven frequencies for both the high and low frequency cutoff filters were chose to provide for a complete range of recording bandwidths.
Selection is made by convenient, fast action, push button switches.
The internal audio power amplifier fulfills the requirement for audio monitoring of the preamplifier output. An ultra low noise experimental setup the absence of capacitive loading effects are made possible by the use of a probe headstage containing the first preamplifier gain block and also all circuitry needed for the other microelectrode termination's. Capacitive neutralization is at your fingertips with a high resolution neutralization control located on the probe. This feature gives you the capability to fine tune signal rise times when your miroelectrode resistance's are greater than a few megohms. A low noise shielded probe cable is so flexible that the lightweight probe head stage will always stay where you want it.