Spectrum (Digital Demod)
When is enabled, the trace is the averaged Instantaneous Spectrum display, as shown in the following block diagram (the block diagram is part of the Digital Demodulation Block Diagram). If averaging is OFF, the and displays are identical.
The trace has the following characteristics:
- Derived from pre-demodulated Time data, which is 20% larger than the Result Length parameter.
- Averaged if averaging is ON and the average type is , , , or averaging.
If averaging is ON, a scan is not included in the average if any of these conditions exist: Pulse Not Found, Sync Not Found, Carrier Unlock. For other demodulators such as W-CDMA Code Division Multiple Access: One of several digital wireless transmission methods in which signals are encoded using a specific pseudo-random sequence, or code, to define a communication channel. A receiver, knowing the code, can use it to decode the received signal in the presence of other signals in the channel. This is one of several "spread spectrum" techniques, which allows multiple users to share the same radio frequency spectrum by assigning each active user an unique code. CDMA offers improved spectral efficiency over analog transmission in that it allows for greater frequency reuse. Other characteristics of CDMA systems reduce dropped calls, increase battery life and offer more secure transmission. See also IS-95. or cdma2000, certain DATA? conditions can cause a scan to not be included in the average.
