Agilent Technologies 11970-90031 manual Then press Center Frequency

Performance Tests

Conversion Loss and Frequency Response

Then press CENTER FREQUENCY:

11970K: 1, 8, GHz

11970A: 2, 6, [.] 5, GHz

11970Q: 3, 3, GHz

11970U: 4, 0, GHz

11970V: 5, 0, GHz

11970W: 7, 5, GHz

14.Press MARKER, PEAK SEARCH. If necessary, press MKR→ CF and use DISPLAY LINE ENTER to find the average of the signal’s peak variations. (When testing 11970V or 11970W mixers, it is important to re-zero the power meter for each measurement.)

15.Record the following in Table 3-7:

Marker Frequency

Marker Amplitude

Power Meter Reading

Power Sensor Cal Factor or Correction Factor (dB)

Directional Coupler Coupling Factor

NOTE	For the purposes of this measurement, the directional coupler coupling factor
	is defined as the ratio of the power at the output flange to the power at the
	coupled flange.

16.Calculate the conversion loss of the mixer with the following equation:

Conversion Loss = Power Meter Reading - 10 log(Cal Factor) - Spectrum Analyzer Marker Amplitude - Coupling Factor

(or given the Power Meter Correction Factor in dB: Conversion Loss = Power Meter Reading + Power Meter Correction Factor - Spectrum Analyzer Marker Amplitude - Coupling Factor)

For example:

Power Meter Reading = -10.03 dBm

Cal Factor = 94.8%

or Correction Factor = -0.232 dB

Spectrum Analyzer reading = -39.78 dBm

Coupling Factor 8.93 dB

then:

Conversion Loss (-10.03) - 10 log(.948) - (-39.78 dBm) - 8.93 dB = 21.05 dB

Performance Tests

Chapter 3 61