Rohde & Schwarz SMU200A - Baseband Input (Option R&S B17)

R&S SMU200A Test Procedures
1007.9845.82 1.49
E-12
Baseband Input (Option R&S B17)
Input Impedance (VSWR)
Test equipment
See section "
Test Assembly for Output Impedance (VSWR)", page 1.5.
Test setup
 Connect the test port to the I or Q input instead of the RF output.
Measurement  Settings on DUT:
Fr
equency any
Level any
I/Q Settings menu:
Source Internal Baseband
State On
BB In Settings menu:
State On
Mode analog input
 Settings on signal generator:
- Level 10 dBm
- Carrier frequency 1 MHz
 Screw the VSWR bridge off and measure the level as reference level.
 C
onnect the VSWR bridge to the I input and measure the level again.
 T
he voltage ratio of test level to reference level is the output
reflection coefficient r of the DUT.
 From this, the voltage standing wave ratio (VSWR) can be calculat
ed
as
follows:
VSWR = (1+r) / (1-r)
 Repeat the measurement with carrier frequencies of 5, 10, 15,
20, 25
and 30
MHz
 Repeat the measurement for the Q input
.