3-50 Service Guide
Adjustments and Correction Constants 8719ET/20ET/22ET
Raw Offset Correction Constants 8719ES/20ES/22ES
RF Network Analyzers
4. The objective is to set the maximum marker reading (MMR) to 4 dB higher than the
power meter reading. Perform the following mathematical operation.
a. Calculate the difference (∆) between the power meter reading (PMR) and the
maximum marker reading (MMR) and then add 4.
∆ = (PMR + 4) − MMR
NOTE The ∆ can be a positive or negative value.
5. If the magnitude of ∆ is less than 0.15 dB, then the offset for the R channel is correctly
set. For ES models, go to “Raw Offset for the A and B Channels (ES Models)” on
page 3-51. For ET Models, go to “Raw Offsets for the A and B Channels (ET Models)” on
page 3-54. If the magnitude is greater than 0.15 dB, continue to the next step.
6. Press the following:
Note the PEEK value displayed under the PEEK label.
7. Calculate the new value by adding the PEEK value to ∆ multiplied by 4.
new value = current value + (∆ X 4)
NOTE Round the new value to the nearest integer.
8. Press and enter the new value, press .
9. To get the analyzer to use the new poke value, press .
10.Press the following:
and enter the frequency from step 1.
The maximum marker reading is MMR.
System
1619001376 x1
Poke x1
Preset
Meas
System
x1
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