High Pass Filter Selector; Gain Selector; Low Pass Filter Selector - OT Bioelettronica GPA4 User Manual

GPA4 User manual
v 1.2
The offset value, introduced by the offset compensation circuit, can be sent to the output
BNC and measured. The input signal has to be excluded by positioning the INPUT switch
in the OFF position and the channel gain has to be set equal to 1.

HIGH PASS FILTER selector

This three positions selector allows to select the -3 dB corner frequency of the second
order high pass filter. The DC position indicates that no high pass filters are introduced
and the channel is DC coupled. Available frequencies are: 1 Hz and 10 Hz.
The frequency values are theoretical, refer to the "Modulo di collaudo" for the real values.

GAIN selector

This twelve positions selector allows to select the channel gain. Available gains are: 1, 2, 5,
10, 20, 50, 100, 200, 500, 1000, 2000, 5000.
The gain values are theoretical, refer to the "Modulo di collaudo" for the real values.

LOW PASS FILTER selector

This four positions selector allows to select the -3 dB corner frequency of the eighth order
low pass filter. Available frequencies are: 25 Hz, 40 Hz, 100 Hz and 500 Hz.
The frequency values are theoretical, refer to the "Modulo di collaudo" for the real values.
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