Viavi CX300 ComXpert, Руководство по эксплуатации

Страница: 165 / 256

Chapter 5 Test and Measurement Functions
CX300 Meters
22130634 CX300 ComXpert Operation Manual Rev. 001
5.6.10 AF Level Meter
The AF Level meter indicates the amplitude of the received audio signal. The
measurement is used to evaluate the output power performance of the transmit device.
AF Level controls and settings are configured from the
AF Level settings menu . The AF
Level meter supports limits which are described in section 5.6.1, on page 5-27,
user-configurable meter scales which are described in section 5.6.2, on page 5-31 , and
average measurements which are described in section 5.6.3, on page 5-31 .
5.6.11 AF Counters
AF Counter is a dynamic meter that changes according to the selected input source.
•
When
Audio
In is selected, the AF Counter updates to display the AF Audio
Counter.
•
When
Demod
is selected, the AF Counter updates to display the AF Demod
Counter.
AF Counter input source is selected on the Audio In window. See section 5.5.2, “Audio In”,
on page 5-25 .
5.6.11.1 AF Counter (Demod)
The AF Demod Counter displays the frequency of the modulation on the received RF
signal. The AF Demod Counter is used to measure the frequency accuracy of the incoming
signal.
The AF Demod Counter supports limits which are described in
section 5.6.1,
on page 5-27, user-configurable meter scales which are described in section 5.6.2,
on page 5-31 , and average measurements which are described in section 5.6.3,
on page 5-31 .
5.6.11.2 AF Counter (Audio)
The AF Audio Counter displays the frequency of the audio signal received at the selected
audio input connector. See section 5.5.2, “Audio In”, on page 5-25 .
The AF Audio Counter supports limits which are described in section 5.6.1, on page 5-27,
user-configurable meter scales which are described in section 5.6.2, on page 5-31 , and
average measurements which are described in section 5.6.3, on page 5-31 .