Reference Power/Reference Level - Rohde & Schwarz R&S FSH Series Operating Manual

Measuring the Carrier-to-Noise Ratio

Reference power/reference level

To determine the reference, you need to enter the type of reference measurement, the reference
channel and the channel bandwidth of the reference channel.
Selecting the reference measurement:
!
Press the SELECT MEASURE softkey.
!
Using the rotary knob or the cursor keys, select the desired measurement method to determine
the reference carrier power (Digital Tx, Analog TV or CW Tx) and confirm your choice with the
ENTER key or the F1 softkey.
The R&S FSH measures the reference in accordance with the selected modulation method.
Selecting the reference channel:
!
Press the REF MEASURE softkey.
!
Using the rotary knob or the cursor keys, select the desired entry (Channel, Vision Carrier Freq,
Center Freq or 8VSB Pilot Freq) and confirm your choice with the ENTER key or the F4 softkey.
You can alternatively also enter the channel center frequency after pressing the FREQ function key.
The R&S FSH measures the reference in the selected transmission channel.
Entering the channel bandwidth of the reference channel:
!
If the reference measurement is active, press the CHANNEL BW softkey.
!
Enter the desired value and terminate the entry with the appropriate unit key.
The R&S FSH sets the span in accordance with the selected bandwidth.
The channel center frequency is calculated when the vision carrier frequency is entered.
Selecting the reference unit:
!
Press the LEVEL softkey.
!
Using the rotary knob or the cursor keys, select the desired entry (dBm, dBmV or dBµV) and
confirm your choice with the ENTER key or the F2 softkey.
The measurement result of the reference measurement is displayed in the selected unit.
Manual reference entry:
!
Press the REF MEASURE softkey.
!
Using the rotary knob or the cursor keys, select MAN REF POWER/LEVEL and confirm with the
ENTER key or the REF MEASURE softkey.
!
Enter the desired reference value in the selected reference unit by means of the numeric
keypad and terminate the entry with one of the unit keys.
Automatic levelling:
!
If the reference measurement is active, press the LEVEL softkey.
!
Using the rotary knob or the cursor keys, select LEVEL ADJUST and confirm your choice with
the ENTER key or the F2 softkey.
Depending on the input signal, the R&S FSH is optimally levelled.
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R&S FSH
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