Agilent Technologies E5503A Guia do Utilizador Página 236

  • Descarregar
  • Adicionar aos meus manuais
  • Imprimir
  • Página
    / 465
  • Índice
  • MARCADORES
  • Avaliado. / 5. Com base em avaliações de clientes
Vista de página 235
Agilent Technologies E5500 Phase Noise Measurement System
7-111
Absolute Measurement Examples
Microwave Source
Figure 7-22 Oscilloscope Display of a Beatnote out of the Agilent/HP 70420A Monitor
Port
1. Estimate the system’s capture range (using the VCO source parameters
entered for this measurement). The estimated VCO tuning constant must
be accurate within a factor of 2. A procedure for Estimating the Tuning
Constant is located in this chapter.
NOTE If you are able to locate the beatnote, but it distorts and then disappears as
you adjust it towards 0 Hz, your sources are injection locking to each other.
Set the beatnote to the lowest frequency possible before injection locking
occurs and then refer to Minimizing Injection Locking in the Problem
Solving section of this chapter for recommended actions.
NOTE If you are not able to tune the beatnote to within the capture range due to
frequency drift, refer to Tracking Frequency Drift in the Problem Solving
section of this chapter for information about measuring drifting signals.
)________(
5
)(
5
)(
Hz
(V)X(Hz/V)
HzRangeCapture
(V)RangeTuningX(Hz/V)ConstantTuningVCO
HzRangeCapture
=
==
==
==
=
=
==
=
Vista de página 235
1 2 ... 231 232 233 234 235 236 237 238 239 240 241 ... 464 465

Comentários a estes Manuais

Sem comentários