PLUGSYS Peak Height Detector Amplifier Module (PHDA)

Peak Height Detector Amplifier Module

Special amplifier for recording extracellular signals from isolated sympathetic ganglia or whole nerve bundles. Works in combination with the Marsh Chamber.

Item# Description U.S. List Price Quantity
73-1743 Peak Height Detector Amplifier Module (PHDA)
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The Peak Height Detector Amplifier Module (PHDA)  is used in conjunction with the ganglion chamber according to MARSH for measuring extracellular potentials of isolated sympathetic ganglia and whole nerve bundles of the rat.

The Peak Height Detector incorporates a variable gain, low-noise differential amplifier and a spike amplitude evaluator. This enables simultaneous monitoring of low amplitude D.C. signals and the amplitude of a selected portion of an evoked potential. The input circuit of this amplifier includes a headstage which is placed near the ganglion chamber. The peak height detector output, which can be displayed on a chart recorder, provides a single continuous record of changes in potential difference (membrane potential) and evoked potential amplitude or separate traces of the same two components, enabling high gain recording of low amplitude changes in membrane potential. An amplified signal output allows oscilloscope monitoring of the evoked potential and adjustment of the detection region for the peak detector.

AC OutOutput of AC voltage, BNC connector 10 V, 10 mA; output used to connect oscilloscope
Accessories2x BNC-BNC cable; 3x BNC-banana cable; 2x BNC-banana adapter; operating instructions
ConnectorDIN 41612, 96-pin VG
DC OutOutput of DC voltage to chart recorder or oscilloscope; DC voltage shown in display; BNC connector
DelayDuring time peak height detector is out of action, peak height detector is enabled for detect duration; delay time can be set in range from 2 to 100 msec
DetectTime is on-time for detecting max. of input signal; detect time can be set in range from 1 to 50 msec
Dimensions (H x W x D) English5.1 x 3.2 x 8.7 in
Dimensions (H x W x D) Metric128.7 x 80.8 x 220 mm
Frequency RangeAC 1.5 Hz to 40 kHz (-3 dB)
DC 0 to 0.2 Hz (-3 dB)
GainSwitchable x50/100/200/500/1000 (including Headstage Gain 10)
HoldHold time is duration of holding amplitude of peak in peak memory; time can be set from 0.1 to 1.5 seconds.
Input from Headstage: Common Mode Rejection Ratio>120 dB
Input from Headstage: Gain10 (only for headstage)
Input from Headstage: HeadstageDifferential Input
Input from Headstage: Input Capacity20 pF
Input from Headstage: Input Impedance>1012?
Input from Headstage: Max. Differential Voltage>0.2 V
Input from Headstage: Noise40 ?Vpp
Input from Headstage: Overshoot Protection15 V constant, 100 V non-repetitive peak
OffsetFine adjustment with 10-turn potentiometer, can be switched off
OutSignal output used to connect up chart recorder or oscilloscope; it is possible to switch voltage peak height or peak height and additional DC voltage to BNC connector with switch PEAK/PEAK+DC. 10 V, 10 mA BNC connector
PLUGSYS Width*4 slot units
Power Supply5 V/0.7 A through connector from PLUGSYS bus system
Signal Output MUXAfter pressing MUX key, one of analog voltages (depending on switch PEAK/PEAK+DC) is switched to system bus line AM (analog multimeter), which can be switched to
Signal Output MUX 2Digital Display Module (DM) or Digital Voltmeter Module (DVM). Function is self-maintained; module previously selected is switched off.
Trigger IN: BNC Connector4 to 30 V
Trigger IN: Input Resistance5 k?
Trigger Out DetectMonitor output, TTL level, to control detect time with oscilloscope, BNC connector
Weight (Metric)500 g