Putting Into Operation; Connecting The Sensor - Rohde & Schwarz R&S NRT-Z14 Manuel D'utilisation

R&S R&S NRT-Z43/Z44
1

Putting into Operation

The following instructions should be strictly observed, in particular when putting the in-
CAUTION
strument into operation the first time, to avoid damage to the instrument and hazards to
persons.
1.1 Unpacking
After unpacking the sensor, check for completeness of the delivery and carefully check all parts for any
damage. In case of any damage you should immediately inform the transport agent and keep all pack-
ing material so as not to forfeit your claims. The original packing should also be used for any later
transport or shipment of the sensor.
1.2

Connecting the Sensor

Fig. 1-1 Connection of power sensor
When measuring high power levels, the following instructions should be strictly observed to avoid dam-
age to the sensor or injury to persons.
1081.1309.02
The directional power sensor may be operated
from the R&S NRT base unit (see section 1.3) or
from a PC/laptop equipped with a USB, serial
RS-232 or PCMCIA interface. The R&S NRT-Z5
interface adapter is required for the USB inter-
face, the R&S NRT-Z4 interface adapter is
required for the PCMCIA interface, and the R&S
NRT-Z3 interface adapter is required for the serial
interface. The sensor is power-supplied via the
R&S NRT or the controller, the only exception
being R&S NRT-Z3 where an external plug-in
power supply unit (provided with R&S NRT-Z3)
must be used.
The sensor is connected between source and
load and measures the power flow in both direc-
tions, i.e. from the source to the load (forward
power) and conversely (reverse power). The ratio
of forward and reverse power is a measure of the
matching of the load which can be measured as
standing wave ratio (SWR), return loss or reflec-
tion coefficient.
The R&S NRT-Z43/Z44 directional power sen-
sors are of unsymmetrical design and should
therefore be connected into the test circuit so that
the arrow on the sensor points to the forward
power direction. In this configuration, all meas-
urement functions are available. Connecting the
sensors the other way round is advisable if the
average of forward powers below 7.5 W (R&S
NRT-Z43) or below 30 W (R&S NRT-Z44) is to
be measured with high accuracy and matching
measurements are of secondary importance.
1.1
Putting into Operation
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