3 Spectrum Analyzer Mode
3.9 SEM Measurement
Radio Std Presets
802.11ah (16 MHz) 15.8 MHz
802.11j/p (20 MHz) 18 MHz
802.11j/p (10 MHz) 9 MHz
802.11p (5 MHz) 4.5 MHz
802.11ax/be (20 MHz) 19.5 MHz
802.11ax/be (40 MHz) 39.0 MHz
802.11ax/be (80 MHz) 79.0 MHz
802.11ax/be (160 MHz) 159.0 MHz
802.11be (320 MHz) 319.0 MHz
802.11ax (80 MHz + 80 MHz) 79.0 MHz
802.11af (6 MHz) 5.7 MHz
802.11af (7 MHz) 6.65 MHz
802.11af (8 MHz) 7.6 MHz
Span
Specifies the span used to calculate the power in the reference channel.
Remote Command
[:SENSe]:SEMask:FREQuency[1]|2:SPAN <freq>
[:SENSe]:SEMask:FREQuency[1]|2:SPAN?
[:SENSe]:SEMask:FREQuency[1]|2:SPAN:AUTO ON | OFF | 1 | 0
[:SENSe]:SEMask:FREQuency[1]|2:SPAN:AUTO?
Example
:SEM:FREQ:SPAN 3MHz
:SEM:FREQ:SPAN?
:SEM:FREQ:SPAN:AUTO OFF
:SEM:FREQ:SPAN:AUTO?
Notes Frequency sub op code, 1 is for BTS, 2 for MS. Default is BTS
Note that Frequency sub op code 2 is supported only in non-SA Modes. In SA Mode, Frequency sub
op code 1 is used for both BTS and MS
If the ref channel is outside the frequency range, the result spectrum will be invalid
Dependencies Not shown in MSR Mode
In order to maintain backwards compatible with legacy LTE FDD/TDD Modes, the channel span key is
supported in LTE & LTE-A converged application. The Auto/Man toggle is added to this key. This key is
enabled and can be changed only in single carrier. The span state is always Auto in Multi-carriers
Span Auto/Man state is only available in LTE/LTE-Advanced FDD/TDD and 5G NR Modes
Couplings Range 1 kHz to 50 MHz (although restricted by Chan Integ BW). If you set the channel Span lower
than channel Integ BW, they will both track each other. As you increase the channel Span, Integ BW
also increases if it is less than 1/10 of the channel Span
Spectrum Analyzer Mode User's &Programmer's Reference 1689
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