About 1xEV-DO Demodulation

1xEV-DO (89601B7NC) adds 1xEV-DO (1x-Evolution Data Only) demodulation capability to your 89600-Series application software. This option lets you measure and analyze 1xEV-DO modulated signals that are defined in these Telecommunications Industry Association (TIA Telecommunications Industry Association (U.S.): One of the Telecommunications standards setting bodies in the United States.) and Electronics Industry Alliance (EIA Electronic Industry Association: A trade association and standards setting organization in the USA.) standard specifications:

3GPP2 C.S0024 v 2.01	1xEV-DO High Rate Packet Data Air Interface Specification
3GPP2 C.S0032 v1.0	1xEV-DO Inter-Operability Specification (IOS) for 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. 2000 Access Network
3GPP2 C.S0033 v1.0	1xEV-DO Inter-Operability Specification (IOS) for CDMA 2000 Access Network
3GPP2 C.P9012	Recommended Minimum Performance Standards for 1xEV-DO High Rate Packet Data Access Terminal
TIA/EIA/IS-856	1xEV-DO High Rate Packet Data Air Interface Specification

Using 1xEV-DO, you can descramble, despread, and demodulate signals modulated by the standards listed above (also known as 1xEV-DO Revision 0). This option supports configurations in the reverse link (Mobile Station or Access Terminal) and forward link (Base Station or Access Network) channels. The VSA will automatically identify all active channels regardless of the Symbol Rate or Walsh Code Length.

1xEV-DO Demodulation does not include support for 1xEV-DO Revision A or Revision B modulated signals.

Signal analysis capabilities including composite code domain power, composite time, and channel specific analysis. Measurement results may be shown in several trace display formats as well as numeric error data formats. Flexible display scaling and marker functionality enhance these measurement capabilities.

The demodulator used in this VSA incorporates advanced technology that does not require coherent carrier signals, or symbol-clock timing signals. The VSA has a built-in IS-2000 EIA Interim Standard 2000 (see cdma2000): A standard for current CDMA systems providing a migration path to 3G services. filter. Signal locking requires the carrier frequency, chip rate, reverse/forward link direction, and Long Code Mask to be set.

The demodulator uses the measured signal (called I/Q Meas Time) to generate an ideal signal (called IQ Ref Time). The VSA uses these signals to provide signal comparison trace data, modulation quality data results and error summary data (see About Trace Data).

Measurement result data include: Time and Frequency domain trace data, Code Domain Power (composite or layer specific) trace data, Channel trace data results and Overall Error Summary data results.