Keithley 2002 User Manual

IEEE-488 Reference
3-160
This command is used to specify the dB reference level. When DB units is selected (:VOLT-
age:AC: DB), ACV db measurements are made using the specified dB reference level.
The reference level is specified in volts and is not range dependent. For example, a dB reference
level of 1 is 1V on all ACV measurement ranges.
PRINT #1, "output 16; :unit:volt:ac:db:ref 2; ref?" ' Set dB reference
PRINT #1, "enter 16" ' Get response message
from 2002
:DBM:IMPedance <n>
:UNIT:VOLTage:AC:DBM:IMPedance <n> Specify dB reference
<n> = 1 to 9999 Specify reference impedance
:IMPedance?
:IMPedance? DEFault
:IMPedance? MINimum
:IMPedance? MAXimum
This command is used to specify the dBm reference impedance level. When dBm units is select-
ed ACV dBm measurements are made using the specified dBm reference impedance.
The reference impedance is specified in ohms and is not range dependent. For example, a dBm
reference level of 600 is 600Ω on all ACV measurement ranges. A rational number is rounded
to the nearest valid integer value.
PRINT #1, "output 16; :unit:volt:ac:dbm:imp 600; imp?" ' Select dBm impedance
PRINT #1, "enter 16" ' Get response message
from 2002
Description
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Parameters
Query
Description
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Keithley 2002 Specifications

General

Resolution	8.5 digits
DC Voltage Accuracy	±0.0006%
Maximum DC Voltage	1000 V
Maximum AC Voltage	750 V
Maximum DC Current	3 A
Maximum AC Current	3 A
Connectivity	GPIB, RS-232
DC Voltage Range	100 mV to 1000 V
AC Voltage Range	100 mV to 750 V
Resistance Range	10 Ω to 1 GΩ
Model	2002
Category	Multimeter
Interface	GPIB, RS-232
AC Current Accuracy	±0.1%
Frequency Range	0.1Hz to 300kHz
Display	VFD
Type	Digital
Power Supply	100-240V AC, 50/60Hz
Current Range (DC)	100 μA to 3 A
Current Accuracy (DC)	±0.01%
Current Range (AC)	100 μA to 3 A
Current Accuracy (AC)	±0.1%
DC Current Range	100 μA to 3 A
AC Current Range	100 μA to 3 A