
Calibration ESG Family Signal Generators
Operation Verification Tests Option H99 (Revision B)
3-6 Manual Supplement
Measure the Power Level Accuracy
1. Connect the RF OUTPUT of the signal generator through the 6 dB attenuator to the RF
input of the spectrum analyzer.
2. Transfer the Measured Power (dBm) column results for each frequency at −15 dBm
from Table 3-1 on page 3-4 to the Power Meter Reading for −15 dBm column found in
Table 3-2.
3. On the spectrum analyzer, select Marker Normal Mode and then select the Peak Search
function. This activates the marker and sets it to the signal peak.
4. On the spectrum analyzer, ensure that the marker is at the signal peak and use the
MKR-> menu to set the marker to the reference level. If necessary, select Peak Search to
ensure that the marker is at the signal peak.
5. With the marker at signal peak, select the Marker Delta function. This will set the marker
to measure relative amplitude from a reference of 0 dB. If the marker reads other than
0 dB, select Marker Normal,Peak Search, and Marker Delta until the marker reads 0 dB.
6. Decrease the signal generator amplitude to −55 dBm.
7. Select Peak Search to ensure that the spectrum analyzer marker is at the signal peak.
Record the marker reading in the Spectrum Analyzer Marker column of Table 3-2.
8. Decrease the signal generator amplitude to −85 dBm.
9. Select Peak Search to ensure that the spectrum analyzer marker is at the signal peak.
Record the marker reading in the Spectrum Analyzer Marker column of Table 3-2.
10. Return the spectrum analyzer reference level back to −15 dBm and the signal
generator amplitude to −15 dBm. Set the signal generator frequency and the spectrum
analyzer’s center frequency to the next frequency listed in Table 3-2 and repeat the
process from Step 3 until all of the frequencies have been measured and recorded.
Calculate the Actual Power Level
1. Calculate and record the Actual Power Level as the sum of the Power Meter Reading for
−15 dBm and the Spectrum Analyzer’s Marker value.
For example:
• Power Meter Reading for −15 dBm at 2.516 MHz = −14.95 dBm
• Spectrum Analyzer Marker at 2.516 MHz and Power Level Setting at
−85 dBm = −70.17 dB
• Actual Power Level at 2.516 MHz and −85 dBm: (−14.95) + (−70.17) = −85.12 dBm
2. Compare the calculated Actual Power Level value to the corresponding limits.