Operating the Power System 4
Keysight N6700 User’s Guide 67
If capacitive loads cause the output to oscillate on the default (Low
bandwidth) or any of the other bandwidth settings, a protection function
will detect the oscillation and latch the output off. The condition is
annunciated by the OSC status bit. At power-on the oscillation
protection function is enabled.
Select a bandwidth according to the following output capacitances and
lead lengths:
Maximum distance from
sense point to capacitor
Low
0–150 μF
Local or remote Full lead length (see chapter 2) 50 to 200 mΩ
High1
0–1 μF
Remote only 6 inches (155 mm) 50 to 200 mΩ
High2
1–7 μF
Remote only 6 inches (155 mm) 50 to 200 mΩ
High3
7–150 μF
Remote only 6 inches (155 mm) 50 to 200 mΩ
See Chapter 2 under “Keysight N678xA SMU Wiring Requirements” for
additional information on allowable load lead lengths.
Connecting capacitive loads that fall outside the indicated ranges may
result in output instability or oscillation, and may cause the output to
turn off, setting the OSC status bit.
Select
Output\Advanced\Bandwidth
.
Select a bandwidth from the
selections listed and press Select.
To select the bandwidth:
VOLT:BWID HIGH1,(@1)
Set the Output Turn-Off Mode
This information applies to Keysight Models N678xA SMU only.
This lets you specify high impedance or low impedance mode at output
turn-on and turn-off.
- At turn-on the output relays are closed after which the
output is programmed to the set value. At turn-off the output is first
programmed to zero, after which the output relays are opened.
– At turn-on the output is programmed to the set value after
which the output relays are closed. At turn-off the output relays are
opened while the output remains at its set value. This reduces current
pulses that may be undesirable in some applications.
Select
.
Select either High Impedance or
Low impedance and press Select.
To set output 1 to a high
impedance mode:
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