Output Bandwidth - Keithley 2302 Instruction Manual

2-10 Basic Power Supply Operation

Output bandwidth

The battery and charger channel's output bandwidth control has HIGH and LOW settings.
The HIGH setting will result in the fastest response with dynamic loads but, could be unstable
with certain loads. The LOW setting mode will have a slower response but will be stable for most
loads.
Testing the performance of the battery charger circuitry in a handset does not require the high
bandwidth performance in channel #1 or channel #2 of the Model 2306. Since a charger circuit
is a voltage regulated circuit, it resembles a high capacitance load to the output of the 2306. For
this type of application, the LOW bandwidth output mode provides increased stability and elim-
inates oscillations that may occur.
The bandwidth can be user programmed at any time. However, if the output is off or the cur-
rent range is not 5A, output bandwidth is automatically set to low as summarized in
Table 2-2
Output bandwidth setting for a channel
Output
ON
OFF
OFF/ON
NOTE
Procedure
NOTE
To set output bandwidth from the front panel:
1.
2.
3.
4.
5.
6.
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Current
5A
5mA or 5A
5mA
The 5mA current range
or through autoranging.
This procedure assumes that the appropriate current range is already selected along
with current limit mode and voltage protection.
Press the MENU key to access the main menu.
Select OUT BANDWIDTH #1 or #2 by scrolling through the primary menu items (use
the and keys to scroll). Scroll until OUT BANDWIDTH is displayed on the bottom
line.
Select channel for bandwidth. Toggle between OUT BANDWIDTH #1 or #2 using the
and keys.
Press ENTER.
Use the and keys to set the desired bandwidth setting (HIGH or LOW). Setting
changes can be cancelled by pressing MENU.
Press ENTER to save and return to main menu.
Bandwidth
LOW or HIGH (user selectable)
LOW
LOW
(Table 2-2) may be selected from the front panel, over the bus,
Table 2-2.