Anritsu ML2480B Series - Page 41

Chapter 3 — Performance Verification 3-9 50 MHz Calibrator VSWR Verification (All Models)
ML248xx, ML249xA MM PN: 13000-00164 Rev. K 3-17
33. Calculate the power which will be used in the VSWR calculation (P
vswr
) for each resistance using the
resistance values from Step 11, the voltage values from Step 31 and the following equation:
P
vswr
for 100 ohms, P
vswr100
= ______________ (should be a number near 1 mV, 0.001 volts)
P
vswr
for 200 ohms, P
vswr200
= ______________ (should be a number near 1 mV, 0.001 volts)
P
vswr
for 300 ohms, P
vswr300
= ______________ (should be a number near 1 mV, 0.001 volts)
P
vswr
for 400 ohms, P
vswr400
= ______________ (should be a number near 1 mV, 0.001 volts)
34. Calculate the variable M for 100, 300 and 400 ohms using the Power values calculated from Step 33, the
reflection coefficients from Step 19 and the following equations:
= ______________
= ______________
= ______________
Table 3-4. 50 MHz VSWR
Bridge Resistance Calibrator Setting V
1
/ V
COMP1
Setting Measured Value
100 Ω
V
1
with RF Calibrator Off V
1
off=
V
COMP1
with RF Calibrator Off V
COMP1
off=
V
1
with RF Calibrator On V
1
on=
V
COMP1
with RF Calibrator On V
COMP1
on=
200 Ω
V
1
with RF Calibrator Off V
1
off=
V
COMP1
with RF Calibrator Off V
COMP1
off=
V
1
with RF Calibrator On V
1
on=
V
COMP1
with RF Calibrator On V
COMP1
on=
300 Ω
V
1
with RF Calibrator Off V
1
off=
V
COMP1
with RF Calibrator Off V
COMP1
off=
V
1
with RF Calibrator On V
1
on=
V
COMP1
with RF Calibrator On V
COMP1
on=
400 Ω
V
1
with RF Calibrator Off V
1
off=
V
COMP1
with RF Calibrator Off V
COMP1
off=
V
1
with RF Calibrator On V
1
on=
V
COMP1
with RF Calibrator On V
COMP1
on=
Pvswr
2 V1on VCOMP1on× V1off VCOMP1off×–()V1off
2
V1on
2
–+
4 R×
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------=
M100
Pvswr200 1 Γ100
2
–()
Pvswr100 1 Γ200
2
–()
------------------------------------------------------------=
M300
Pvswr200 1 Γ300
2
–()
Pvswr300 1 Γ200
2
–()
------------------------------------------------------------=
M400
Pvswr200 1 Γ400
2
–()
Pvswr400 1 Γ200
2
–()
------------------------------------------------------------=