Chapter 3 Front-Panel Operation
Tracking Operation
42
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% output +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 38 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 output + 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
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