Agilent Technologies E3631-90002, User Manual, Page: 41 / 166

Chapter 3 Front-Panel Operation
Tracking Operation
40
Tracking Operation
The ±25V supplies provide 0 to ±25 V tracking outputs. In the track mode,
two voltages of the ±25V supplies track each other within ±(0.2% 20
mV) for convenience in varying the symmetrical voltages needed by
operational amplifiers and other circuits using balanced positive and
negative inputs. The state of track mode is stored in
volatile
memory; the
track is always off state when power has been off or after a remote interface
reset.
To operate the power supply in the track mode, proceed as follows:
1 Set the +25V supply to the desired voltage as described in previous
section “Constant Voltage Operation”(see page 36 for detailed
information).
2 Enable the track mode.
The key must be depressed for at least 1 second to enable the
track mode. When the track mode is first enabled, the -25V supply will
be set to the same voltage level as the +25V supply. Once enabled, any
change of the voltage level in either the +25V supply or the -25V supply
will be reflected in other supply. The current limit is independently set
for each of the +25V or the -25V supply and is not affected by the track
mode.
3 Verify that the ± 25V supplies track each other properly.
You can verify that the voltage of the -25V supply tracks that of the +25V
supply within ±(0.2% of 20 mV) from the front-panel display by
comparing the voltage values of the +25V supply and the -25V supply.
In the track mode, if the CC annunciator is lit when the display is selected
for the +25V supply, choose a higher current limit for the +25V supply.
If the
CC annunciator is lit when the display is selected for the -25V
supply, choose a higher current limit for the -25V supply.
Track
Track