Agilent Technologies 8719ET Service Manual page 122

Adjustments and Correction Constants
Raw Offset Correction Constants
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
The ∆ can be a positive or negative value.
NOTE
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
page 3-51. For ET Models, go to
page 3-54. If the magnitude is greater than 0.15 dB, continue to the next step.
6. Press the following:
System SERVICE MENU
PEEK POKE PEEK/POKE ADDRESS
1619001376 x1
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
Poke
9. To get the analyzer to use the new poke value, press
10.Press the following:
INPUT PORTS
Meas
CW FREQ
Sweep Setup
SERVICE MENU
System
MARKER SEARCH
x1
The maximum marker reading is MMR.
3-50
"Raw Offset for the A and B Channels (ES Models)" on
"Raw Offsets for the A and B Channels (ET Models)" on
PEEK
R
and enter the frequency from step 1.
SERVICE MODES
SEARCH:MAX
.
x1
.
Preset
MORE SAMPLER COR OFF
8719ET/20ET/22ET
8719ES/20ES/22ES
RF Network Analyzers
Service Guide