2 - General Information
26
Figure 2-1 also shows a single range − two quadrant capability. This means that the dc source is capable
of sourcing as well as sinking current over the output voltage range from zero volts to the rated voltage.
This negative current sinking capability provides fast downprogramming of the output of the dc source. It
can also be used to sink current from a battery charger, thus providing battery charger test capability. The
negative current is not programmable, and varies linearly from approximately 1.2 amperes at the full
rated voltage, to approximately 2.8 amperes at zero output voltage.
NOTE: If you attempt to operate the dc source beyond its output ratings, the output of the unit
may become unregulated. This is indicated by the UNR annunciator on the front panel.
The output may also become unregulated if the ac line voltage drops below the minimum
rating specified in Appendix A.
Output 2 Characteristic
As shown in the following figure, Agilent 66309B/D units have a second output rated at 12 V and 1.5A.
The second output has all of the primary programmable features as the main output, with the exception of
the waveform measurement capability, the open sense lead detect capability, overvoltage protection, and
low current range.
Output
Voltage
Output
Current
1.5A
+12V
0
+
-
3.0A
Peak Current
capability for up
to 1 ms shown
by dotted lines
Figure 2-2. Output 2 Characteristic
Tables A-1 through A-3 document the specifications and supplemental characteristics of the Agilent dc
sources documented in this manual.