Operating Manual EMI TEST RECEIVER ESIB7 - Rohde & Schwarz

ESIB
Analyzer - Main Markers
Channel Power Measurements
A modulated carrier is almost always used (exception e.g.,.: SSB-AM) for high-frequency transmission
of information. Due to the information modulated onto the carrier, the latter covers a spectrum which is
defined by the modulation, the data transmission rate and the signal filtering. Within a transmission
band, each carrier is assigned a channel taking into account these parameters. In order to ensure errorfree
transmission, each transmitter must keep within its specified parameters. These include among
others:
• the output power,
• the occupied bandwidth, i.e., the bandwidth within which a defined percentage of the power must be
contained and
• the power received by adjacent channels.
Using the power measurement function, the ESIB is capable of measuring all the specified parameters
with high precision and at high speed.
The power measurements settings are performed in the left-hand side-menu MARKER NORMAL.
MARKER NORMAL menu:
MARKER
NORMAL
POWER MEAS
SETTINGS
CHANNEL
POWER
CP / ACP
ABS REL
SET CP
REFERENCE
C / N
The following measurements can be made:
• channel power (CHANNEL POWER)
• signal / noise power (C/N)
• signal / noise power density (C/No)
• adjacent channel power (ADJACENT CHAN POWER)
• occupied bandwidth (OCCUPIED PWR BANDWIDTH)
The channel power and the adjacent channel power can be measured either
relative (CP/ACP REL) to the power in the utilised channel or in absolute terms
(CP/ACP ABS).
Channel configuration is via sub menu POWER MEAS SETTINGS.
The above mentioned power measurements can be performed alternately.
C / No
ADJACENT
CHAN POWER
ADJUST CP
SETTINGS
OCCUPIED
PWR BANDW
1088.7531.12 4.183 E-15