Placing a 2601B-PULSE in standby
Placing the 2601B-PULSE in standby does not place the instrument in a safe state (an
interlock is provided for this function).
When the instrument is on, the output may be placed in an active output state (output on) or a standby mode
(output off). From the front panel, pressing the OUTPUT ON/OFF control toggles the output using the present
instrument configuration. You can also place the output in standby over the remote interface by sending the
following command:
smua.source.output = smua.OUTPUT_OFF
Even though the instrument is placed in standby, the output may not be actually off.
Warmup period
The 2601B-PULSE must be turned on and allowed to warm up for at least two hours to achieve
rated accuracies.
Line frequency configuration
The factory configures the 2601B-PULSE to automatically detect the power line frequency (either 50 Hz or
60 Hz) at each power-up. This detected line frequency is used for aperture (NPLC) calculations.
In noisy environments, you can manually configure the instrument to match the actual line frequency.
To configure the line frequency from the front panel:
1. Press the MENU key, then turn the navigation wheel to select LINE-FREQ, and then press the
ENTER key.
2. Turn the navigation wheel to select the appropriate frequency and then press the ENTER key. To
configure the instrument to automatically detect line frequency at each power-up, select AUTO.
3. Press the EXIT (LOCAL) key to return to the main display.
To configure the line frequency from a remote interface:
Set the localnode.linefreq or the localnode.autolinefreq attribute. To set the line frequency to
60 Hz, send:
localnode.linefreq = 60
To configure the instrument to automatically detect line frequency at each power-up:
localnode.autolinefreq = true
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