Setting the Amplitude Parameters
R&S FSH
1145.5973.12 4.8
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scale with LIN 0-100 %. The level is expressed as a percentage (0 % to 100 %) of the reference level.
This mode is useful if you want to display, for example, a carrier being amplitude modulated in the time
domain (SPAN = 0 Hz).
The R&S FSH can also handle measurements on 75
systems. The R&S FSH does not select a
75 RF input per se, but instead only a 75 matching pad connected at the RF input. The
50/75 Matching Pad R&S RAZ is recommended for 75 matching (see recommended accessories).
The R&S FSH automatically considers the conversion factor when a value of 75 is set. Other
matching pads such as the R&S RAM or R&S FSH-Z38 can be taken into account by using a
transducer factor (included with the R&S FSH View control software).
Setting the reference level
Press the AMPT key.
The reference level entry is activated immediately. The
REF LEVEL softkey label is highlighted in red.
Enter a reference level with the number keys and
either terminate the entry with one of the unit keys
(-dBm or dBm for relative measurements or (), m,
O
, n for absolute measurements) or press the
ENTER key, or
Adjust the reference level with the rotary knob or
the cursor keys.
Any changes you make to the reference level with the
rotary knob or the cursor keys are immediate. The
trace moves as changes to the reference level are
made.
When the reference level you want has been set,
you can remove the value entry box from the
screen by pressing the CANCEL key.
Entering the display range
Press the AMPT key.
Press the RANGE softkey.
A submenu opens. The various options for scaling the
level axis are displayed.
Using the rotary knob or the cursor keys, select the
scaling option you want and confirm your selection
by pressing the ENTER key.
The scaling option you have chosen is immediately set
on the R&S FSH.
The menu items VSWR REFL COEFF (ROH) and
REFL COEFF (mROH) are valid scaling options only if
the R&S FSH is fitted with a tracking generator which
is configured for reflection measurements. The SMITH
