TUNING THE HEADSTAGE
•
121
Chapter 11
Chapter 11
Headstage Tuning Procedure
This procedure should be carried out if the user has done any of the following:
1) Purchased an additional headstage and needs to match it to the main unit.
2) Has found the step response of the WHOLE CELL configuration is unacceptable.
This should be verified by applying a high quality triangle voltage waveform to the
SPEED TEST BNC. (A 10 V
p-p
100 Hz triangle wave will inject a 1 nA
p-p
square
wave into the headstage input).
3) Has determined that the reset transients in PATCH mode are more than twice the
typical values (see
SPECIFICATIONS
). This should be verified by warming up the
unit for at least one hour and connecting the PATCH-1U model cell (PATCH
position) as a load. Set the HOLDING COMMAND to + or - 200 mV to induce
resets (toggle set to x1). Monitor the SCALED OUTPUT BNC and trigger your
scope from the DATA NOT VALID BNC.
Equipment Required
Oscilloscope
High quality triangle waveform generator
100 Hz, 4-pole (or greater) Bessel filter (optional)
PATCH-1U model cell
Various BNC cables
Large piece of aluminum foil for shielding the headstage
To Next Page
Loading...
Need help?
General
