Dagan IX2-700 Manual de instruções - Página 7

Procurar online ou descarregar pdf Manual de instruções para Amplificador Dagan IX2-700. Dagan IX2-700 14 páginas. Dual intracellular preamplifier

IX2-700 Dual Intracellular Preamplifier

EXTERNAL I BNC

The External I BNC allows for externally generated step commands at

20nA/V times the headstage multiplier.

1/3/5/10/30 KHZ WB FILTER SWITCH

The low pass filter limits the high frequency response of the amplifier to

minimize noise. The bandwidth should be set to the lowest setting, which will not

distort the desired input signal. The Wide Band WB position removes the filter and

leaves the amplifier with as wide as possible frequency response. The filter switch

only affects the 10 Vm and 100 Vm connector.

CLEAR SWITCH

The Clear Switch can be used to clear blocked microelectrode tips by

passing a large current through the recording electrode. It is also useful or impaling

cells, and typically, the Clear positive will be (100nA X N) the most common

polarity, although negative currents are also available. In addition, the Buzz Switch

is many times useful for clearing a blocked microelectrode and impaling cells.

MONITOR (MON) BNC CONNECTOR

Actual currents being passed through the microelectrode are monitored and

available at the I MON connector. Sensitivity is +10 mV per nA divided by the

headstage multiplier. Thus, for the X.I probe sensitivity is 100 mV per nA. The

usable dynamic range of the I MON connector is +12V. The I MON connector is

unfiltered. Output impedance is 600 ohms.

10 Vm and 100 Vm Output BNC CONNECTORS

These outputs of the voltage recording amplifier scaled up by +10 and +100.

This output is processed by the filter switch and has added to it the Offset voltage.

The output impedance is 600 Ohms and the range is + 12 volts.

IG CALIBRATION

The headstage bias current can be adjusted by shorting the headstage Input

to ground (headstage rod) and setting 10 Vm output to zero using the OFFSET

Control. Then put a 10 to 100 megohm resistor from the headstage input to ground

and then use a small screwdriver or trimpot adjustor for 10 Vm equal zero.