User`s guide

168 Agilent E5505A User’s Guide
6 Absolute Measurement Examples
Checking the beatnote
While the connect diagram is still displayed, use an oscilloscope (connected to
the Monitor port on the test set) or a counter to check the beatnote being
created between the reference source and your device-under-test. The
objective of checking the beatnote is to ensure that the center frequencies of
the two sources are close enough in frequency to create a beatnote that is
within the capture range of the system.
The phase-lock-loop (PLL) capture range is 5% of the peak tuning range of the
VCO source you are using. (The peak tuning range for your VCO can be
estimated by multiplying the VCO tuning constant by the tune range of VCO.
Refer to Chapter 14, “Evaluating Your Measurement Results” if you are not
familiar with the relationship between the PLL capture range and the peak
tuning range of the VCO.)
Frequency • 50 kHz to 1.6 GHz (Std)
• 50 kHz to 26.5 GHz (Option 001)
• 50 kHz to 26.5 GHz (Option 201)
Maximum Signal Input Power Sum of the reference and signal input power
shall not exceed +23 dBm (+30 with Option 001)
At Attenuator Output, Operating Level Range:
• RF Phase Detectors 0 to +23 dBm (Signal Input)
+15 to +23 dBm (Reference Input)
• Microwave Phase Detectors 0 to +5 dBm (Signal Input)
+7 to +10 dBm (Reference Input)
Internal AM Detector 0 to +20 dBm
Downconverters:
• Agilent N5502A/70422A +5 to +15 dBm
• Agilent N5507A/70427A 0 to +30 dBm
Characteristics
Input Impedance 50 Ω nominal
AM Noise DC coupled to 50 Ω load
Table 21 Test set signal input limits and characteristics (continued)
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