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Measuring the Source
Measuring the Detector
Press Instrument State
Select
MODE DC
4. On the source:
Press
CW 5 50 5 MHz 5
Connect the power meter/sensor to the output of the splitter.
Press
Ext Det MORE Coupling actor
ALC 5
Press
POWER LEVEL 5
power level for a power meter reading within
0
10 dBm.
readjust the power level for the remainder of this test.
Do not
5. On the source:
Press
and enter the test frequencies as shown on the work
CW 5
sheet.
For example:
CW 5 .0 5 GHz 5
6. Using the Cal Factor Chart on the Power Sensor:
a. Set the
Cal Factor %
indicated for the test frequency as needed. (Use the nearest
frequency value.)
b. Note the reading on the power meter.
c. Record this value onto the worksheet able 4-3 under the
\Source Power" column.
7. Repeat steps 5 and 6 using, at minimum, the test frequencies
noted on the work sheet.
8. Disconnect the power meter/sensor.
9. With the detector still disconnected from the source, zero the
detector:
Press
on the 8757D.
CAL 5
Select
DC DET ZERO 5
Select
AUTOZERO
When the zero is complete, the display will indicate:
AUTO ZERO COMPLETE
.
SYSTEM 5
.
.
0
and, if necessary, adjust the
0 5 dBm 5
.
on the power meter to the value
.
.
.
.
0 5 dB 5
6
0.05 dB of
Performance Tests 4-7
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