Rohde & Schwarz FSP3 - Performance Test Option External Mixing R&S FSP-B21; Checking LO-Levels

R&S FSP Performance Test
1164.4556.82 1.37 E-1
Performance Test Option External Mixing R&S FSP-B21
Checking LO-Levels
Measurement equipment:
- Power sensor (section „Measurement Equipment“, item 19)
Frequency range 7.0 MHz to 13.2 GHz
Max. input power P
max
+ 23 dBm
RSS  2.5% reffered to measured power
Impedance Z = 50 
- Power meter (Section „Measurement Equipment“, item 8)
- Fixed attenuator with 10 dB
(Section „Measurement Equipment“, item 20)
Power meter settings: - Connect power sensor to the power meter and execute function
´ZERO´ when there is no signal applied to the power sensor.
R&S FSP settings:
- [ PRESET ]
- [ FREQ : EXTERNAL MIXER : SELECT BAND ]
- Table settings:
Band: USER
Harmonic # 20
- [ FREQUENCY SPAN : ZERO SPAN ]
- [ FREQ CENTER : {f
Center
} ]
f
Center
see table
Power meter setting: - Connect power sensor via fixed attenuator to the output ‘LO
out
/ IF
in
’
Measurement: - Determine level of the LO-signal L
LO,meas
.To achive higher accuracy it
is recommended to compensate the frequency response of the power
sensor.
Evaluation:
The level of the LO-signal can be determined as:
L
LO
= L
LO,meas
+ 10 dB