Fluke Biomedical 960SG-500 - Manual (Page 13)

Operation
4
4-3
The power requirement of 15V @ 100mA is met using an external power supply. The power supply is connected to
TB1 on the rear panel of the signal generator. Regulator Q2 provides 5V power to the appropriate components.
Pin connections for TB1 are listed below:
PIN CONNECTIONS TB1
Pin
Designation
1 GND
2 -15V @ 100mA
3 +15V @ 100mA
4 GND
4.7 Power Switch and Power On Indicator
Switch SW5 is utilized to turn the unit on and off. A light emitting diode CR3 is used to indicate whether the power is
on or off. The LED is on when the power switch if on.
4.8 Options
The following paragraphs describe the options available for the signal generator and their associated functions.
Variable Amplitude Adjustment – Potentiometer R30 provides a front panel adjustment of pulse amplitude
from 0V to approximately 6V. Switch SW1 allows the user to select the variable adjustment or the fixed 2V
pulse amplitude.
Power On Indicator – Light-emitting diode CR3 is the power On/Off indicator. It will be on when power is
on and off when there is no power to the unit.
Remote Detector/Test input Multiplexer – An input for a remote switch allows the detector or the test signal
to be routed to the 960SG signal output connector J5. Refer to drawing 960SG-500-5 to locate the switch. A
contact closure to ground is provided for sensing of this condition by the UDR.
4.9 Operation
To operate the signal generator, the customer’s enable switch (pulser control) should be closed. This freezes the
241 Am regulator operation and automatically switches on the 960SG Signal Generator. The signal generator can be
preset or adjusted during the enable period.
The slide switch can be used to select the desired frequency. In addition, the frequency potentiometer can be
adjusted to give a specific frequency between those indicated on the slide switch. The amplitude can be adjusted
using potentiometer R30. It will give a pulse amplitude that will fall within the single channel analyzer window by
giving a test pulse signal that can trip the HIGH Alarm. This will provide an operational check of the rate meter.