R&S NRP2, Руководство пользователя

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Programming Measurements
R&S
®
NRP2
381 User Manual 1173.9157.02 ─ 03
Example:
MEAS:ARRay? (1000)
1000 measured values are recorded in the ContAv mode. After termination of the last
measurement, the results are stored in the output queue. There is no triggering as in the
ContAv mode. The measurement result is a list of 1000 measured values separated by
a comma.
The keywords for processing two sensors can be added to the
MEAS:TSL
,
MEAS:BURS
and
MEAS:ARRay
commands, but the
:SWR
,
:RLOS
and
:REFL
functions are not avail-
able.
Example:
MEAS:TSL:RAT? 577 us, 8, 18 us, 18 us, DEF, 3, (@1), (@3)
The above timeslot example is extended to two sensors. The measurement result is a
list of 8 measured values separated by a comma for the 8 timeslots; these values were
obtained by division from the measured values of sensors 1 and 3.
C.1.5 Selecting the output unit for measured values
So far, no information has been given on the unit of the measured values. It is possible
to modify the output unit of the measured values. A distinction is made as to whether the
result represents a power or a power ratio. Relative measurements always deliver power
ratios. This also applies to the
:RATio
,
:SWR
,
:RLOS
and
:REFL
functions. The units
are set by means of the following commands:
UNIT:POWer DBM | W | DBUV
and
UNIT:RATio DB | DPCT | O
The default settings are
DBM
for power values and
DB
for power ratios.
Physical
unit
SCPI
notation
Meaning
dBm DBM Power in dB referenced to 1 mW: x / W = 10 log ( x / (1 mW) ) / dBm
Watt
W
dBµV DBUV
Power in dB referred to (1µV) 2 / 50 (: x dBm ( (x + 107) dBµV
dB DB
Δ
%
DPCT
Deviation from 100% in %: x (% =
Δ
x + 100) %
1 O
When the
:SWR
,
:RLOS
and
:REFL
functions are used, the output unit, however, is
implicitly set by the
MEAS
command:
Measuring with high-level commands