Using Standard Setups/Presets (W-CDMA(3GPP)/HSDPA)

Menu Path: MeasSetup > W-CDMA(3GPP)/HSPA Demod Properties > Format tab > Preset to Standard... button

Preset to Standard selects a 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.(3GPP) standard preset configuration. When a standard preset is selected, the VSA automatically sets the parameters shown in the following table:

Downlink: W-CDMA(3GPP) downlink signal (Base Station Transceiver)

Uplink: W-CDMA(3GPP) uplink signal (Mobile Station or User Equipment)

Note

The W-CDMA(3GPP) demodulator must be selected before these Standard Setups/Presets are available.

W-CDMA (3GPP)/HSDPA High Speed Downlink Packet Access Standard Presets
Parameter	Downlink	Uplink
Frequency Span	5 MHz Megahertz: A unit of frequency equal to one million hertz or cycles per second.	5 MHz
Direction	Downlink	Uplink
Chip Rate	3.84 MHz	3.84 MHz
Enable HSPA Analysis †	Cleared	Cleared
Number of Tx Antennas †	na	na
Synchronization Start Slot	Auto	Auto
Scramble Code	0	0
Scramble Code Offset	0	na
Scramble Code Type	Standard	na
Synchronization Type	CPICH Common Pilot Channel	DPCCH Dedicated Physical Control Channel
DPCCH Slot Format	na	0
Alpha	0.22	0.22
Despread Channel: Spread Code Length	256/15 kHz kiloHertz: A radio frequency measurement (one kilohertz = one thousand cycles per second).	256/15 kHz
Code Channel	0	0
Despread Traces †	Normal	na
I/Q Branch	na	Q
Modulation Scheme †	Auto	na
tDPCH	Auto	na
Decode Channel Type	None	None
tHS-DPCCH: Code Location	na	S256(1):(I)
Value	na	0
CDP Layer: Spread Code Length	256/15 kHz	256/15 kHz
Result Length	15 slots (1 frame)	15 slots (1 frames)
Measurement Offset	0 slots	0 slots
Measurement Interval	1 slot	1 slot
In Each Slot †	na	na
Test Model	None	na
Normalize IQ Traces	Selected	Selected
Mirror Frequency Spectrum	Cleared	Cleared
Include IQ Offset in EVM Error vector magnitude (EVM): A quality metric in digital communication systems. See the EVM metric in the Error Summary Table topic in each demodulator for more information on how EVM is calculated for that modulation format.	Selected	Selected
Bypass RRC Meas Filter	Cleared	Cleared
Suppress SCH in Code Channel Results	Selected	na
Enable DTX Discontinuous Transmission: A feature in mobile systems where transmitters mute when there is no information to send, such as during periods of silence. This feature prolongs battery life in portable phones and reduces interference in wireless systems./Burst Detection	Selected	Selected
Use Multichannel Estimator	Cleared	Cleared
Active Channel Threshold	Auto	Auto
MIMO Multiple Input, Multiple Output: A physical layer (PHY) configuration in which both transmitter and receiver use multiple antennas. †	na	na
S-CCPCH Common Control Physical Channel †		na
Indicator Channels: PICH Page Indicator Channel Code Channel S(256)	16	na
Frequency Error Tolerance Range	Normal	Normal
"na" - parameter does not apply. † - HPSPA measurements (Enable HSPA Analysis must be selected.)