User`s manual

Chapter 3 69
HP-IB Command Guidelines
Guidelines for Operation
Display Units (DUNits)
Display Units are the units-of-measure used by the Test Set to display
numeric data (field settings and measurement results) on the
front-panel CRT display. For example, the RF Generator’s frequency
can be displayed in Hz, kHz, MHz and GHz. Similarly, the measured TX
Frequency can be displayed in Hz, kHz, MHz and GHz.
When evaluating an entered value for a numeric field, the Test Set
interprets the data it receives in terms of the Display Units currently
set. For example, if the Display Units for the RF Gen Freq field are set
to GHz and the operator tries to enter 500 into the field, an Input
value out of range error is generated since the Test Set interpreted
the value as 500 GHz which is outside the valid frequency range of the
Test Set.
Changing Display Units Use the DUNits command to change the
units-of-measure used by the Test Set to display any field setting or
measurement result. For example, to change the Display Units setting
for the TX Power measurement field from W to dBm, the following
command would be used:
Example 3-8 Example
MEAS:RFR:POW:DUN DBM
Example 3-9 GHz
:MEAS:RFR:FREQ:ABS:DUN GHZ
Example 3-10 MHz
:MEAS:RFR:FREQ:ABS:DUN MHZ
Example 3-11 kHz
:MEAS:RFR:FREQ:ABS:DUN KHZ
Example 3-12 Hz
:MEAS:RFR:FREQ:ABS:DUN HZ
Example 3-13 ppm
:MEAS:RFR:FREQ:ERR:DUN PPM
Example 3-14 %D
:MEAS:RFR:FREQ:ERR:DUN PCTDIFF
Example 3-15 V
:MEAS:RFR:POW:DUN V