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Command Reference
TM-XR9B-01XN 3–15
UNMASK? Asks for the supply's fault conditions which are currently enabled (unmasked).
Response: UNMASK <fault mask> where fault mask is the decimal equivalent of
the total bit weights for the operating conditions as listed in the status and fault
registers See “Accumulated Status, Status, and Fault Registers” on page 3–17.
VDATA
<Vlo>,<Vhi>
Calculates and records the slope and offset for programmed voltage using VLO
and VHI data. Set CMODE ON before using this command. See also the
calibration procedures in Chapter 4.
<Vlo> and <Vhi> are in <voltage> format.
VHI In response to this command, the power supply sends a programmed voltage value
to the output terminal. This value is at the high end of the power supply’s voltage
range and is read by an external device connected as part of the calibration
procedure. Refer to this value as VHI and record it to use as input with the VDATA
command. Set CMODE ON before using this command. See also the calibration
procedures in Chapter 4.
VLO In response to this command, the power supply sends a programmed voltage value
to the output terminal. This value is at the low end of the power supply’s voltage
range and is read by an external voltmeter connected as part of the calibration
procedure. Refer to this value as VLO and record it to use as input with the
VDATA command. Set CMODE ON before using this command. See also the
calibration procedures in Chapter 4.
VMAX <voltage> Sets an upper soft limit on the supply’s programmed output voltage. If the soft limit
is exceeded, or if the soft limit value is lower than the present output voltage
setting, the supply will ignore the command, turn on the ERR LED, and set the
ERR bit in the accumulated status register.
Range: 0 to model maximum output voltage (VMAX)
Initial value: model VMAX
VMAX? Asks for the supply’s soft voltage limit setting.
Response: VMAX <voltage>
VOUT? Measures the supply’s actual voltage output using the built-in voltage readback
circuitry.
Response: VOUT <voltage>
VRDAT
<Vlo>,<Vhi>
Calculates and records the slope and offset for readback voltage using VRLO and
VRHI data. Set CMODE ON before using this command. See also the calibration
procedures in Chapter 4 .
<Vlo> and <Vhi> are in <voltage> format.
Table 3-7
Command Reference
TM-XR9B-01XN.book Page 15 Monday, April 19, 2004 9:00 AM