This menu presents the user with functions for Power and Match calculations.

This section takes any one of the inputs for match and
calculates the others and the Mismatch Loss for the mismatch. In the case
presented I have input 14dB Return Loss and have checked the voltage measurement
type for a scalar analyzer return loss and it calculated that match value in
terms of VSWR and rho. The conversion from dB to rho is performed as 20*
Log10(V2/V1). Press **Calculate** to
compute and display. **Clear** to reset
and reenter value to retry and **Close**
to Quit.

Figure 82 Match Conversions

This section is for taking the complex System Impedance and
the Termination or Device Impedance and calculating the Gamma or complex
reflection ratio then figure the scalar rho, VSWR, Return Loss and the Mismatch
Loss for Gamma. Press **Calculate** to
compute and display. **Clear** to reset
and reenter value to retry and **Close**
to Quit.

Figure 83 Match by Impedance

This section is to calculate the power delivered to the
load. The user inputs the Source Return Loss, System Return Loss, Load Return
Loss all in dB and the Source Power in dBm. This will then calculate the Power
Delivered to the Load. Press **Calculate**
to compute and display. **Clear** to
reset and reenter value to retry and **Close**
to Quit.

Figure 84 - Power Delivered to Load

One method to improve the match into a device is to add
some attenuation. This will increase the load match by double the amount of the
attenuator. So if we have say a 13dB return loss input match and we wish to
improve, we can add a 3dB attenuator to get a 19dB load. A 6dB Attenuator would
make that 24dB return loss. Press **Calculate**
to compute and display. **Clear** to
reset and reenter value to retry and **Close**
to Quit.

Figure 85 Load Matching

The Match Sum screen allow the user to take two mismatches
and add them in a manner to get the Max or Worst case match of the two combined
in effect. Enter Return Loss #1 and #2 to calculate. Press **Calculate** to compute and display. **Clear** to reset and reenter value to retry and **Close** to Quit.

Figure 86 Sum of Matches

The upper section will convert power in watts to dBm and
vice-versa. It can also compute Vpp and Vrms if impedance in Ohms is specified.
If dBm or **Calculate**
to perform the calculation, **Clear** to
clear the fields and reenter or **Close**
to quit the screen.

Figure 87 Signal Level and Summation

Enter any values Integrated Total Power, Bandwidth or Power
Spectral Density in dBm/Hz or dBm/MHz. if entering Total Power and some
Bandwidth and you desire to compute total power in some other Bandwidth enter
the lower bandwidth value and the dBm/Bw will be computer. Press the **Calculate**
to perform the calculation, **Clear** to
clear the fields and reenter or **Close**
to quit the screen.

Figure 88 Power Match Power Spectral Density

This screen gives the user the Gain/Loss in dB power to
Voltage or power gain in linear units. Enter any one value to compute the
others. Press the **Calculate** to
perform the calculation, **Clear** to
clear the fields and reenter or **Close**
to quit the screen.

Figure 89 Power Match Gain/Loss

This section is for determining the error for power meter measurements.

This function set has two functions. One function is to
figure the match conversions. The other is to compute the Upper and

The Power Error Section take the Measured Power and the
Power Error as percent and calculate the Upper and Lower Power and Power Error
in **Calculate**
to compute and display. **Clear** to
reset and reenter value to retry and **Close**
to Quit.

The Match section takes any one of the inputs for match and
calculates the others and the Mismatch Loss for the mismatch. In the case
presented I have input 14dB Return Loss and have checked the voltage measurement
type for a scalar analyzer return loss and it calculated that match value in
terms of VSWR and rho. The measurement type radio buttons allow the user to
determine if the measurement inputs are scalar voltage based or thermister power
based measurements. The difference being how the calculation to convert from dB
to rho is performed as 10*Log10(Power Ratio)for power based or 20* Log10(Voltage
Ratio) for Scalar or Voltage based measurements. This Scalar/Voltage based
measurement covers Scalar analyzers, Vector Analyzers, Spectrum Analyzers and
Voltage based Power Measurements. Press **CalcMatch**
to compute and display. **Clear** to
reset and reenter value to retry and **Close**
to Quit.

Figure 135 Power Error Match Conversions

The Match Sum screen allow the user to take two mismatches
and add them in a manner to get the Max or Worst case match of the two combined
in effect. Enter Return Loss #1 and #2 to calculate. Press **Calculate** to compute and display. **Clear** to reset and reenter value to retry and **Close** to Quit.

Figure 136 Power Error match Sum

One method to improve the
match into a device is to add some attenuation. This will increase the load
match by double the amount of the attenuator. So if we have say a 13dB return
loss input match and we wish to improve, we can add a 3dB attenuator to get a
19dB load. A 6dB Attenuator would make that 24dB return loss. Press **Calculate**
to compute and display. **Clear** to
reset and reenter value to retry and **Close**
to Quit.

Figure 137 Power Error Attenuator Match Improvement

This screen is used to determine the error in power
measurement that accounts for the Inputs of Source, Load and Detector matches.
Select the appropriate Power or Voltage based measurements and Press **Calculate**
to perform the calculation and get the Upper and Lower Limit of the power
measurement and the Total Uncertainty and also as a percent of total power
measured. **Clear** to reset and reenter value to retry and **Close** to Quit.

Figure 138 Power Measurement Error

This screen is used to determine the error in power
transmission measurements that account for the Inputs of Source and Detector
matches as well as the Device Under Test Input and Output Return Loss in dB and
the Forward and Reverse Transmission coefficients in dB. Select the appropriate
Power or Voltage based measurements and Press **Calculate** to perform the calculation and get the Upper and Lower
Limit of the power measurement and the Total Uncertainty. **Clear** to reset and reenter value to retry and **Close** to Quit.

Figure 139 Power Transmission Measurement Error

This screen is used to determine the error in power
measurements using a coupler. It accounts for the Inputs of Source, Load and
Detector matches as well as the Coupler Input and Output Return Loss in dB and
the Coupling and Isolation Transmission coefficients in dB. Select the
appropriate Power or Voltage based measurements and Press **Calculate** to perform the calculation and get the Upper and Lower
Limit of the power measurement and the Total Uncertainty. **Clear** to reset and reenter value to retry and **Close** to Quit.

Figure 140 Power Error Coupler Based Measurements