R&S SMJ100A, Operating Manual

Page: 316 / 874

Instrument Function
R&S
®
SMJ100A
300 Operating Manual 1403.7458.32 ─ 14
Note: The noise signal is not generated arbitrarily for a particular bandwidth, but
instead it is generated in steps. Noise therefore also occurs outside the set system
bandwidth. This means that the total measurable noise power (see below) usually
exceeds the value displayed here. Correct measurement of the noise power within the
system bandwidth is possible by means of channel power measurement using a signal
analyzer.
Remote command:
[:SOURce<hw>]:AWGN:POWer:NOISe
on page 577
Noise Power (Total Bandwidth) - AWGN
Displays the power of the noise signal in the total bandwidth in "Noise Only" and "Addi-
tive Noise" mode.
Remote command:
[:SOURce<hw>]:AWGN:POWer:NOISe:TOTal?
on page 578
C Noise Power / Noise Power (System Bandwidth) / C
Interferer Power / Interferer Power
In "Additive Noise" and "CW Interferer" modes, displays the overall power of the noise/
interferer signal plus useful signal.
Note: This parameter differs depending on the selected interfering and display mode,
see Mode - AWGN and Display Mode - AWGN . Consequently, the overall power of the
measured signals is composed of different signals, and is also represented in different
units, dBm or dB full scale.
Tip: In the "Additive Noise" mode, select the "Display Output Results For" (analog or
digital) before.
Remote command:
[:SOURce<hw>]:AWGN:POWer:SUM?
on page 579
C Noise PEP / Noise PEP (Total Bandwidth) / C Interferer
PEP / Interferer PEP
(Additive Noise and CW Interferer)
Displays the peak envelope power of the overall signal composed of noise signal plus
useful signal.
The name of this parameter depends on the selected "Display Mode".
Impairment of Digital I/Q Signal and Noise Generator - AWGN/IMP Block