Rohde & Schwarz FSP3 Service Manual page 41

R&S FSP
Checking frequency response
Test setup:
Signal generator settings:
R&S FSP settings:
Reference measurement:
Measurement
Signal generator settings:
Power meter settings:
R&S FSP settings:
Evaluation:
1164.4556.82
Connect RF output of signal generator to input of power splitter.
Connect output 1 of power splitter to power sensor / power meter.
Connect output 2 of divider to RF input of the R&S FSP.
- Level 0 dBm
- Frequency 128 MHz
- [ PRESET ]
- [ AMPT : RF ATTEN MANUAL : 10 dB ]
- [ AMPT : 0 dBm ]
- [ SPAN : 100 kHz ]
- [ BW : RES BW MANUAL : 10 kHz ]
- [ TRACE : DETECTOR : RMS ]
- [ FREQ : CENTER : 128 MHz ]
Determine signal level L
Set marker to peak of signal:
- [ MKR : PEAK ]
The signal level L is displayed by the level reading of marker 1.
FSP
Ref = L - L
128MHz FSP powermeter
- Frequency f
fresp
Refer to "Performance Test Report" table for values of f
Determine signal level L
compensating for the frequency response of the power sensor is
recommended.
- [ FREQ : CENTER : {f
fresp
Refer to "Performance Test Report" table for values of f
- Set marker to peak of signal:
- [ MKR : PEAK ]
The signal level L is displayed by the level reading of marker 1.
FSP
The frequency response can be calculated as follows:
Frequency response = L
1.13
.
powermeter
. To achieve higher accuracy,
powermeter
} ]
- L - Ref
FSP powermeter
Performance Test
.
fresp
.
fresp
128 MHz
E-1