User`s guide

Expanding Your Measurement Experience 4
Agilent E5505A User’s Guide 89
Status messages
This section describes the status messages that appear on the display as the
system performs the calibration routines.
Determining Presence of Beat Note... An initial check is made to verify that a
beatnote is present within the system’s detection range.
Verifying zero-beat... The frequency of the beatnote is measured to see if it is
within 5% of the estimated Peak Tuning Range of the system. The system’s
Peak Tuning Range is the portion of the voltage-controlled-oscillator (VCO)
source’s tuning range being used for the measurement.
When the system measures the phase noise of a signal source using the Phase
Lock Loop technique (the technique being used in this example) it requires
that one of the two sources used in the setup is a VCO. As you see later in this
demonstration, you are required to estimate the tuning range of the VCO
source you are using when you set up your own Phase Lock Loop
measurements.
Table 9 Test set signal input limits and characteristics
Limits
Frequency 50 kHz to 26.5 GHz
Maximum Signal Input Power +30 dBm (with Option 001)
At Attenuator Output, Operating Level Range:
• RF Phase Detectors
• Microwave Phase Detectors
• Internal AM Detector
0 to +23 dBm
0 to +5 dBm
0 to +20 dBm
Downconverters:
• Agilent N5502A/70422A
• Agilent N5507A/70427A
+5 to +15 dBm
0 to +30 dBm
Characteristics
Input Impedance 50 Ω nominal
AM Noise DC coupled to 50 Ω load
NOTE
Refer to the following system connect diagram examples in Chapter 18, “System
Interconnections,” for more information about system interconnections.
•
Figure 307, “E5505A system connections with standard test set,” on page 403
• Figure 308, “E5505A system connections with test set option 001,” on page 404
• Figure 309, “E5505A system connections with test set option 201,” on page 405