R&S SMJ100A, Operating Manual, Page: 312 / 874

Instrument Function
R&S
®
SMJ100A
296 Operating Manual 1403.7458.32 ─ 14
Noise Bandwidth - AWGN
(Additive Noise and Noise Only)
Indicates the real noise bandwidth. The value is indicated when AWGN state is "On".
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.
Remote command:
[:SOURce<hw>]:AWGN:BWIDth:NOISe?
on page 573
Display Mode - AWGN
Switches between Baseband and RF representation.
This setting influences the way the interfering parameters are displayed, as for exam-
ple the SNR value defined as C/N, or as S/N.
Remote command:
[:SOURce<hw>]:AWGN:DISP:MODE
on page 574
Display Output Results For - AWGN
(Additive Noise and Noise Only)
Selects the display of output results for the analog (DACIF) or the digital (BBOUT) sig-
nal path.
Note: This selection field is only available with the option R&S SMJ-B18, Baseband
Digital I/Q Out. If the instrument is not equipped with this option the parameters of the
analog signal path are displayed.
"Analog Out-
put" The parameters of the analog signal path are displayed.
"Digital Output" The parameters of the digital signal path are displayed.
Remote command:
[:SOURce<hw>]:AWGN:DISP:ORESults
on page 574
Target CW Frequency - AWGN
(CW Interferer mode only)
Sets the desired frequency of the sine in "CW Interferer" mode.
Remote command:
[:SOURce<hw>]:AWGN:FREQuency:TARGet
on page 575
Resulting CW Frequency - AWGN
(CW Interferer mode only)
Indication of the actual CW frequency of the sinusoidal signal in "CW Interferer" mode.
The actual frequency may differ from the desired frequency, since the resolution is limi-
ted to 0.7 Hz.
Tip: The desired frequency constellation can be precisely set with an accuracy of up to
0.01 Hz by selecting a suitable frequency offset of the baseband source (e.g. Custom
Dig Mod) and by correcting the RF frequency by the difference between Resulting and
Target CW Frequency.
Impairment of Digital I/Q Signal and Noise Generator - AWGN/IMP Block