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Performance ver

iﬁcation

Phase noise

The intent of the Phase Noise test is to measure the phase noise level of the instrument. The phase noise speciﬁcation does

not cover residual spurs. If the speciﬁc m easurement frequency results in measuring a r esidual spur that is visible above the

noise level, the phase noise speciﬁcation applies not to the spur but to the noise level on either side of the spur. P lease

refer to the Spurious Response speciﬁcations. Also, refer to the Spurious Response section of this procedure to determine

whether or not a residual spur is within the speciﬁcation.

Connect the signal generator and RSA306 as shown in the following ﬁgure.

1. Reset the RSA306 to factory defaults (Presets > Main).

2. Run the RSA306 alignment procedure (Tools > Alignments > Align Now). Note: the Center frequency should be 1 GHz.

3. Set the signal generator CW frequency = 1GHz.

4. Set the signal generator CW amplitude = 0dBmat the RS306 input.

5. Select External Reference (Setup > Acquire > Frequency Reference > External)

6. Set trace detection = +PEAK (Setup > Settings > Traces > Detection)

7. Measure the CW amplitude for the following settings:

a. Trace Function = Avg (Vrms), 10 averages (Setup > Settings > Traces > Function: Avg (Vrms), count = 10)

b. Span = 100 kHz

c. RBW = 1kHz

d. Move MR marker to highest amplitude signal after 10 averages, write the marker value as the CW amplitude (for the

1kHzﬁlter) in the measurement table. (See Table 14.)

8. Measure the CW amplitude for the following settings:

a. Span = 10 kHz

b. RBW = 100 Hz

c. Move MR marker to highest amplitude signal after 10 averages, write marker value as the CW amplitude for the

100 Hz ﬁlter and 10 Hz ﬁlter in the measurement table. (See Table 14.)

9. Set Trace detection = Avg (Vrms).

10. Set Marker function = Power (dBm/Hz) (Mar kers > Deﬁne Markers > Readouts (near bottom of window) > P ower).

11. Turn on marker (Markers > De ﬁne Markers > Add)

31 RSA306 Speci ﬁcations and Performance Veriﬁcation

Tektronix RSA306 Technical Reference

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