R&S FSH3 Measuring with Transducer Factors
The R&S FSH3 displays a list of transducer factors
available in the unit. The cursor is on the active
transducer factor (line highlighted). If no transducer is
active, the cursor is on the first item in the list.
¾ Select the desired transducer factor with the rotary
knob or the cursor keys and switch it on with the
SELECT softkey.
¾ Switch off an active transducer factor with the
TRANSD OFF softkey
or
¾ Quit the transducer menu with the EXIT softkey.
When LIST->PRINTER is pressed, the R&S FSH3 outputs the list of transducer factors to a printer.
If a transducer is switched on, TRD is displayed in the
top right-hand corner of the diagram on the
R&S FSH3.
The complete name of the selected transducer is
displayed in the status line (press the STATUS key
and scroll downward in the list), or in the list of
transducer factors (entry highlighted in red).
The example (Fig. right) shows the transducer factor of
the R&S HL223 antenna, which is defined as between
200 MHz and 1300 MHz. The R&S FSH3 therefore
displays the noise in this frequency range as a function
of frequency incremented by the transducer factor.
Outside the transducer range, the R&S FSH3 sets the
transducer factor at zero, i.e. measurements in this
range do not yield conclusive results.
A second transducer factor can be switched on with
the TRANSD dB softkey, which is then added to the
first. The unit of the second transducer factor must
always be the relative unit dB as otherwise an addition
would not be useful. When TRANSD DB is selected,
the R&S FSH3 offers only the transducer factors
stored in the instrument with dB as the unit.
Unit for measurements with transducers:
If the unit of the transducer is dB, the units dBm, dBmV or dBµV remain unchanged. The linear units
Volt and Watt are not permissible. They are deactivated in the units menu.
If the unit of the transducer is dBµV/m or dBµA/m, this unit is also used for the R&S FSH3 level display.
This means that both the level axis of the diagram and the level at the marker position are assigned the
unit of the transducer. If dBµV/m is selected as the transducer unit, switchover to absolute level
indication in V/m is possible.
Switchover to V/m level indication:
¾ Press the AMPT key.
¾ Press the UNIT softkey.
¾ In the UNIT menu, select V by means of the rotary knob or the cursor keys and confirm with the
ENTER key or by pressing the UNIT softkey again.
1145.5973.12 4.83 E-6
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