Calibration Description - Keysight N6705 Service Manual

3 Calibration

Calibration Description

44
Refer to the "Equipment Required" section in chapter 2 for a list of the
equipment required for calibration. Also refer to "Measurement
Techniques" for information about voltmeter and current shunt
connections. Additional information about calibration follows:
The correct password is required to enter the Administrative Tools

menu, which contains the calibration function. The password is
factory-set to 0 (zero). You can change the password once
calibration mode is entered to prevent unauthorized access to the
calibration mode. Refer to "Change the Calibration Password" at the
end of this section.
Calibrate only ONE output channel at a time. When using the SCPI

calibration commands, you can only enter a single channel number
for the channel parameter.
When calibrating the unit using SCPI commands, most steps involve

sending a *OPC? query to synchronize with the DC Power Analyzer's
command completion before proceeding. The response from the
instrument must be read each time *OPC? is given. In some steps, it
may take up to 30 seconds for *OPC? to respond.
Once started, you must perform the complete calibration

procedure in its entirety. As each calibration section is completed,
the instrument calculates new calibration constants and begins
using them. However, these constants are not saved in nonvolatile
memory until a SAVE command is explicitly given.
Exit the calibration mode either by logging out of the Administrative

Tools menu or by sending CAL:STAT OFF. Note that any output
channels that were calibrated but not saved will revert to their
previous calibration constants.
Calibration Switches
Two switches control the access to calibration commands. The switches
are on the BNC board and are accessible by removing the side cover.
Refer to "Accessing the Calibration switch" in chapter 4 for settings
information.
Front Panel Connections
Except for Cal Setup C, do not connect anything to the Sense
terminals. Check the front panel 4 wire LED to see whether 4 wire
sensing is enabled (LED is lit) or disabled (LED not lit). To change the 4
wire sense settings, press [Settings], then navigate to and select
Advanced. Under Sense, select Local or 4 Wire sensing.
Connect all leads to the output terminals as shown in the figure on the
left.
Model N6705 Service Guide