10 Monitor Spectrum Measurement
BW
BW
Displays the menu keys that enable you to control the BW parameters.
Key Path
Front-panel key
Initial S/W Revision A.13.00
RBW (Meters)
Activates the Resolution Bandwidth (RBW) action function, which allows you to manually set the RBW. For
the Monitor Spectrum measurement, this key only affects the RBWs used for meters.
Key Path
BW
Remote Command
[:SENSe]:BANDwidth|BWIDth[:RESolution] <freq>
[:SENSe]:BANDwidth|BWIDth[:RESolution]?
[:SENSe]:BANDwidth|BWIDth[:RESolution]:AUTO OFF|ON|0|1
[:SENSe]:BANDwidth|BWIDth[:RESolution]:AUTO?
Example BAND 200kHz
BAND?
BAND:AUTO 0
BAND:AUTO?
Notes For numeric entries, the RBW chooses the nearest (arithmetically, on a linear scale, rounding up)
available RBW to the value entered.
For Monitor Spectrum, the set of RBW’s available is more limited than in other measurements.
Therefore when switching to the Monitor Spectrum measurement, the current RBW is changed to
the closest available Monitor Spectrum RBW.
For Monitor Spectrum, only the following RBW’s are available (these are all 6 dB bandwidths,
regardless of the current EMC standard):
When EMC Std is None, the available values are 1 MHz, 120 kHz, 100 kHz, 10 kHz, 9 kHz, 1 kHz,
200 Hz, 100 Hz, 10 Hz.
When EMC Std is CISPR, the available values are 1 MHz, 120 kHz, 9 kHz,
1 kHz, 200 Hz, 100 Hz, 10 Hz.
When EMC Std is MIL, the available values are 1 MHz, 100 kHz, 10 kHz,
1 kHz, 100 Hz, 10 Hz.
Dependencies When EMC Std is set to None, there is no Auto setting for RBW (Meters). The Auto/Man line on this
softkey disappears in this case, and if the SCPI command [:SENSe]:BWID[:RESolution]:AUTO ON is
sent, it generates an error.
Couplings When a CISPR or MIL EMI Standard is in use, the RBW (Meters) in Auto mode is coupled to Center
Frequency.
When CISPR is in use, RBW (Meters) in Auto is:
200 Hz (CF - Band A, 9 kHz to 150 kHz)
9 kHz (CF - Band B, 150 kHz to 30 MHz)
748 EMI Receiver Mode Reference
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