Agilent Technologies E5503A Uživatelská příručka stáhnout pdf (Strana 261)

100

101

Agilent Technologies E5500 Phase Noise Measurement System

8-21

Residual Measurement Fundamentals

The Calibration Options

Double-Sided Spur This calibration option has the following requirements:

• One of the input frequency sources must be capable of being phase

modulated.

• The resultant sideband spurs from the phase modulation must have

amplitudes that are –100 dB and –20 dB relative to the carrier

amplitude.

• The offset frequency or modulation frequency must be between 10 Hz

and maximum (See the “Measured Beatnote” technique on page 8-16).

Advantages:

• Requires only one RF source

• Calibration is done under actual measurement conditions so all

non-linearities and harmonics of the phase detector are calibrated out.

NOTE Because the calibration is performed under actual measurement conditions,

the Double-sided Spur Method and the Single-sided Spur Method are the

two most accurate calibration methods.

Disadvantages:

• Requires a phase modulator which operates at the desired carrier

frequency.

• Requires audio calibration source.

• Requires RF spectrum analyzer for manual measurement of ΦM

sidebands or preferably a modulation analyzer.

NOTE Most phase modulators are typically narrow-band devices; therefore, a wide

range of test frequencies may require multiple phase modulators.

1 2 ... 256 257 258 259 260 261 262 263 264 265 266 ... 464 465

Komentáře k této Příručce

Žádné komentáře

Agilent Technologies E5503A Uživatelská příručka Strana 261

Komentáře k této Příručce

Související produkty a manuály pro Stroj na snižování hluku Agilent Technologies E5503A