Model 2601B-PULSE System SourceMeter Instrument Reference Manual Section 2: Installation
2601B-PULSE-901-01A April 2020 2-11
Line frequency configuration
The factory configures the 2601B-PULSE to detect the power line frequency automatically at each
power-up. This detected line frequency (either 50 Hz or 60 Hz) 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
Remote communications interfaces
You can choose from one of several communication interfaces to send commands to and receive
responses from the 2601B-PULSE.
You can control the 2601B-PULSE from only one communications interface at a time. The first
interface on which the instrument receives a message takes control of the instrument. If another
interface sends a message, that interface can take control of the instrument. You may need to enter a
password to change the interface, depending on the setting of interface access.
The 2601B-PULSE automatically detects the type of communications interface (LAN, USB, GPIB, or
RS-232) when you connect to the respective port on the rear panel of the instrument. In most cases,
you do not need to configure anything on the instrument. In addition, you do not need to reboot if you
change the type of interface that is connected.
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