cdma2000 Reverse Channel Setup

This table enables you to view the key parameters for each channel in the carrier. You can also add or delete channels using the buttons above the table (see descriptions below). Clicking a channel row activates the setup tables for that channel. You can use a maximum of 8 channels.

Channel Number	Radio Config	Walsh Code
Name	I/Q Axis	PN Offset
State	Data Rate	Data
Power

Opens a

drop-down menu of predefined channel configuration selections. Double-clicking a configuration replaces the current configuration in the Channel Configuration Summary Table.

Opens a

drop-down menu which allows you to add a channel to the current configuration. The following types of channels can be added to the channel configuration: Pilot, DedCont, Traffic, or two supplemental traffic

The new channel is added immediately above the currently highlighted channel in the Channel Configuration Summary Table.

When selecting from the Traffic or the supplemental traffic channels, Closed

additional drop-down menus are displayed which allows you to select the available data rate choices for each channel type.

Deletes the currently highlighted channels in the Channel Configuration Summary Table and the current configuration. You can highlight multiple channels by holding down the CTRL key while selecting the channels. You can also use the SHIFT key to select a succession (group) of channels.

3GPP2

Available Data Rates (bps):	1500, 2700, 4800, or 9600

Available Data Rates (bps):	1500, 2700, 4800, 9600, 19200, 38400, 76800, 153600, or 307200

Channel Number

Displays the channel number selected in the Channel Configuration Summary Table. You can change the channel configuration or add individual channels using the Add Channel button at the top of the table.

Name

Displays the channel type or name that is selected in the Channel Configuration Summary Table.

State

Sets the state of the selected channel to either on or off. The

icon at the right of the entry box displays the valid selections.

Power

Radio Config

Displays the Radio Config value of the selected channel. This value was set when the predefined configuration was selected or the channel was added as a new channel.

I/Q Axis

Displays the I/Q Axis setting of the selected channel. This value is determined by the Radio Config setting.

Data Rate

Displays the data rate of the selected channel. This value was set when the predefined configuration was selected or the channel was added as a new channel.

Walsh Code

Pilot: Dedicated Control: Traffic: Supplemental 1 Traffic: Supplemental 2 Traffic:	Default: 0 / Range: 0 to 31 Fixed at 8 Fixed at 4 Fixed at 1 Fixed at 2

Pilot: Dedicated Control: Traffic: Supplemental 1 Traffic: Supplemental 2 Traffic:	Default: 0 / Range: 0 to 31 Fixed at 8 Fixed at 4 Fixed at 1 Fixed at 2

PN Offset

Data

Allows you to select or specify the data for the selected channel. The

icon at the right of the entry box opens the Closed

Data Source Selection dialog box.

The Data Source Selection dialog box allows you to select from Random, PN9, or User Defined Bits.

To select from the following data types, click the desired radio selection:

Random

Provides random signal generator data. If this is the selection, you are returned to the Channel Setup pane.

PN9

Provides a pseudo-random bit sequence containing 511 bits (2⁹-1). When there are not enough bits left in the PN sequence to fill a frame, the software repeats the data sequence. When the maximum length is reached, it truncates any remaining data. If this is the selection, you are returned to the Channel Setup pane.

User Defined Bits

Opens the Closed user data entry area, which lets you customize the transmitted data.

The user data entry area contains buttons to import, export, or clear user data along with the ability to insert PN9 data. Optionally you can manually insert or delete data. To manually insert data, simply place the cursor within the data entry area or highlight existing bits, and insert data. There are three ways to insert data:

using the 1 and 0 keys on the keyboard
using the Insert PN9 button
pasting data from a file or from within the current view

(The key board shortcuts Ctrl+C and Ctrl+V work for user data entry.)

To delete data, simply place the cursor at the desired location within the data or highlight bits, and delete the data. The key board shortcut Ctrl+Z also deletes highlighted data.

The maximum number of bits for the user data entry area is 65,536, which is also the maximum file size.

The expanded area has four buttons that can be used to manipulate data for the channel.

The four buttons in the expanded area are:

Import

Loads a user-defined pattern from a selected location. When you select this button, the Open user defined data dialog box appears for navigating to and selecting the desired file. An imported file automatically updates the user data entry area. The software accepts the following file types:

ASCII text
comma separated values (csv)
binary

The maximum file size is 65,536 bits. If the imported file is larger than 65,536 bits, the software truncates the bits to conform to the maximum file size.

Export

Saves the current data pattern, showing in the user data entry area, to a file. When you select this button, a Save user defined data dialog box appears for navigating to the location where you can save the file. The software saves the user data as one of the following selected file types:

ASCII text
comma separated values (csv)
binary

Clear

Clears all data showing in the user data entry area.

Insert PN9

Inserts a fixed pattern pseudo-random bit sequence containing 511 bits (2⁹-1) into the user data entry area. The software generates this fixed pattern in accordance with the CCITT recommendation O.153. Repeated clicking of this button adds additional PN9 sequences until the software attains the maximum file size of 65,536 bits. The software truncates data in excess of the maximum file size.

To edit the data pattern, insert the cursor at the desired point in the file and click Insert PN9, or enter the information manually using the keyboard keys 1 and 0. The software inserts the data at the cursor position and truncates all data in excess of 65,536 bits.

Graphs

CDP

Shows the Code Domain Power (CDP) graph. This graph shows the position and power level of each channel, relative to the Walsh Code applied. Select the channel setup in the Closed

tree view to view the CDP distribution for that carrier.

Click on a Closed

channel in the graph to view the parameter selections for that channel.

Bit Reverse / Hadamard

uses an algorithm that displays each Walsh code in sequence and the composite representation of the traffic channel.

uses an algorithm that displays the channels as a bar for each channel with the bar height proportionately representative of the channel power and the bar width proportional to the data rate.

CCDF

Shows the Complimentary Cumulative Distribution Function (CCDF) graph. This graph shows the plot and peak-to-average values for the current carrier. This topic describes the CCDF functionality using the graph in the Channel Setup view.

The CCDF graph displays the probability (in percentage) of the generated carrier's calculated peak-to-average power ratio (measured in dB) meeting or exceeding a certain level. The table to the left of the CCDF plot displays the calculated peak-to-average values for the carrier. For additional information, see Understanding CCDF Curves.

Click

from the main tool bar to generate an I/Q waveform and plot the CCDF graph using the current channel configuration. Any changes to the channel configuration setup do not appear on the graph until you generate the waveform. The status bar at the bottom of the screen shows waveform generation progress.

Each time you adjust parameters and generate a waveform, a plot is added to the Closed

graph. The graph retains your three most recent plots (in shades of gray), allowing you to make comparisons of waveform characteristics.

Use the buttons shown below to plot the Gaussian data, reference data and generated waveform data to the CCDF graph. The graph's initial state shows only the Gaussian curve (blue) until you generate a waveform.

Gaussian

Reference

Toggles the view of the reference curve (red). The reference appears as a flat line until you generate a waveform and click the button

Acquire Ref.

Sets the current waveform curve to yellow and the reference curve to red. Click the Reference button to view the reference curve.

Channel Setup: CDMA2000 Reverse

Channel Configuration Summary Table