Power Trigger Mode - Berkeley Varitronics Systems BumbleBee-TABLET Manual

IMPORTANT NOTE:
1. The Center Frequency has to be within the Frequency Band supported by the BumbleBee Receiver.
2. The Span is divided equally on both the sides of the Center Frequency.
3. The software performs "Span Checking" to make sure that the span does not exceed the bounds of
the Frequency Band supported by the BumbleBee Receiver. For example: For a BumbleBee which
supports the 2400 MHz – 2500 MHz frequency band, if the current center frequency is 2480 MH,.
the maximum span which can be set would be 40 MHz.
The Legend on the bottom of the window is explained as below:
3.2 Trigger Mode:
The Swept Spectrum Mode can be slow in detecting and measuring bursts of signal energy. This is
because when the receiver scans a certain portion of the spectrum, it will miss a burst of signal energy
such as a frequency hop of a Frequency Hopping device on a nearby frequency. In the Swept Spectrum
Mode, the only time the receiver will detect and measure signal energy is when the burst of signal energy
occurs at the frequencies the BumbleBee receiver is currently scanning. This problem can be particularly
compounded if the Sweep Span is large and the resolution bandwidth is small. As a solution to this
problem, the BumbleBee Receiver has a Power Trigger Mode. In this mode, the user can set a power
threshold for the receiver to trigger on, every time the channel power exceeds this threshold. This way, the
receiver captures bursts of signal energy occurring over a 20 MHz channel bandwidth whenever the
Channel Power within this 20 MHz channel exceeds the Power Threshold. In addition to this, the user can
set a delay so that the receiver will measure the channel power only after the amount of specified delay
following a trigger. This setting ensures that the RF energy of the desired portion of the data packet is
measured.
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