HP 8340B Manual page 48

4-9. SINGLE SIDEBAND PHASE NOISE (Cont'd)
100 kHz Offset Calibration
20. On the HP 3585A, press FREQUENCY SPAN, 250 kHz, RES 8W, 1 kHz.
21. Reduce LO frequency by 90 kHz (IF
IF Cal Data
22. Increase the LO frequency by 100 kHz (IF
PHASE NOISE MEASUREMENT
23. Connectequipment as shown in Figure 4-9 with the amplifier connected directly to the HP 3585A
50 Ohm input. Return the HP 3585A to 50 Ohm input impedance.
24. On the DUT, press [POWERLEVEL] [0] [dB(m)]. Select the HP 3585A REFERENCE LEVEL to
place the peak of the IF at the top graticule of the display. Ensure IF
necessary adjust LO for an HP 3585A COUNTER reading of 1 MHz ±0.9Hz.
25. On the HP 3585A, press FREQUENCY SPAN, 250 Hz, RES 8W, 3 Hz. Step the RANGE until the
overload light just turns on and then increment it one step. Allow one sweep to occur.
30 Hz Offset
(not applicable to units equipped with Option 007, Relaxed Phase Noise Specifications)
26. On the HP 3585A, press
27. On the HP 3585A, press OFFSET, ENTER OFFSET CF STEP SIZE, 30 Hz, MANUAL, STEP UP
(key), NOISE LVL. The noise level measurement takes approximately 30 seconds. For an accu-
rate reading, allow at least 2 measurements to be made before recording value. Record Measured
Noise Level (MNL) into Table 4-20.
Step Offset
27
29
31
34
36 lOOK
1. Applies only to HP 83406
28. On the HP 3585A, press COUNTER NOISE LVL, OFFSET, CONT. Return marker to peak of IF
and ensure COUNTER reading is 1 MHz
drifted more than 6 Hz, steps 26 through 28 must be repeated.
HP 8340B/41B
1.1 MHz ±0.9Hz). Repeat step 13.
=
MANUAL, CLEAR A, MKR
Table 4-20. Phase Noise Measurement Data
Measured Noise Level [MNL, dBc (1 Hz)J
2.202 GHz
30
100
1K
10K
1 MHz ±0.9Hz). Repeat step 13.
=
CF, COUNTER.
—~
6.902 0Hz 13.402 0Hz
0.9 Hz. If necessary, adjust LO for a 1 MHz IF. If the IF
±
MHz ±0.9Hz. If
1
=
19.502 0Hz 26.032 0Hz 1
Performance Tests 4-49