HP 8566B Adjustment Manual page 95

16. Harmonic and Intermodulation Distortion Test
TO1 = P + S/2, where P = input signal power, and S = third order suppression from step 38.
36. Wait for completion of the sweep, then press MARKER
Record the MKR A amplitude:
37. Press @J three times to tune to the third order product at 2101.5
MHz. Wait for completion of the sweep, then press MARKER
Record the MKR A amplitude:
38. Choose the smallest MKR A amplitude in steps 36 and 37.
Record its absolute value:
(For example, if one MKR A amplitude is -82 dB and the other
is -79 dB, record +79 dB.) This value is S, the third order
suppression.
39. Compute the third order intercept (TOI) as follows:
40. The result should be > + 7 dBm. Refer to Figure 2-30.
TO1 for signals of 2099.5 MHz and 2100.5 MHz