Real Time

Carrier "N"

Carrier Configuration Summary Table

This table enables you to view the key parameters for each carrier in the waveform. You can also add or delete carriers using the buttons above the table (see descriptions below). Double-clicking a carrier row activates the setup tables for that carrier. You can use a maximum of 25 carriers in the waveforms.

Default: Varies by Radio Format

Opens a drop-down menu with the predefined carrier configuration selections. Double-clicking a predefined carrier configuration in the window replaces the current carrier configurations in the Carrier Configuration Summary Table.

Opens a drop-down menu which allows you to add a carrier to the current configuration. The new carrier is added immediately above the currently highlighted carrier in the Carrier Configuration Summary Table.

Deletes the highlighted carriers in the Carrier Configuration Summary Table.

Copies the highlighted carrier and appends the copy to the bottom of the carrier list.

3GPP2

State

Selections: On, Off

Default: On

Sets the state of the selected carrier to either on or off. The icon at the right edge of the entry box displays a drop-down list with all available selections. 

Channel Configuration

Selections: Varies by radio format

Default: Varies by radio format

Sets the predefined channel configuration of the selected carrier. The icon at the right edge of the entry box displays a drop-down list with all available selections. The configuration can also be set by selecting the button in each of the Channel Setup panes.  

Repetition

Range: 0 to 30

Default: 2

Sets the number of repetitions this frame is used in the sequence.

MAC Index

Range: 2 to 127

Default: 7

Sets the medium access control (MAC) index for the forward link traffic channel.

RPC Exist

Selections: True or False

Default: True

Select True, if you want to use the bits entered in the RPC Data field. Select False, if you want to set the RPC data in the TimeSlots node.

RPC Data

Default: 01

Sets RPC data used in MAC channel.

Number of Super Frames

Range: 1 to 100

Default: 1

Note: 1 Super frame is 240 ms length

Enter a number of frames for the selected carrier.

The number of frames in a multi-carrier waveform is determined by the carrier with the largest number of frames. In carriers in the waveform with fewer frames, the frames are repeated until the number of frames matches that in the longest carrier. For example, for two carriers A and B in the same waveform, if A has 10 frames and B has 3 frames, B is repeated 3 times completely, then one more frame from B is used before both A and B start again.

Expand Sequence

Selections: On, Off

Default: On

Expands the generated sequence to one waveform file. On means it will generate one waveform instead of a sequnece containing 2 waveforms.

Waveform Length

Displays the length of the waveform.

Chip Rate

Displays the chip rate setting of the selected carrier.

Waveform Generation Length

Double-click or use the drop-down menu to select the waveform generation length.

For the Basic 1xEV-DO Rev.A Reverse carrier, when Auto is the selection, the carrier length is determined by the Data Packet Transmission Repetition value:

• For a value of 3, the Waveform Generation Length is 240 ms.

• For a value other than 3, the Waveform Generation Length is 80 ms.

A waveform offset is available using the Waveform Generation Offset parameter when one of the following conditions apply:

• For IS95A and cdma2000 carrriers, when less than a PN Sequence Period is selected.

• For Basic 1xEV-DO Carriers except Basic 1xEV-DO Rev.A Reverse Carrier, when less than one physical layer packet is selected.

• For Basic 1xEV-DO Rev.A Reverse carrier, when Auto is not the selection.

Waveform Generation Offset

Range: 0–15 PCG/Slot (15 is the waveform generation length)

Default: 0.0 ms

Coupling:

This setting is grayed out until one of the following conditions is met using the Waveform Generation Length parameter:

• For IS95A and cdma2000 carrriers, when less than a PN Sequence Period is selected.

• For Basic 1xEV-DO Carriers except Basic 1xEV-DO Rev .A Reverse Carrier, when less than one physical layer packet is selected.

• For Basic 1xEV-DO Rev.A Reverse carrier, when Auto is not the selection.

Sets the waveform generation offset, when the waveform generation length selected is less than 16 PCGs/slots. The offset value is clipped so that the offset and the waveform length does not exceed 16 PCGs/slots

Baseband

Radio Config

Displays the radio configuration selection of the selected carrier. This cell is displayed in CDMA2000 Reverse only.

Oversampling Ratio

Selections: Auto, 1, 2, 4, 8, 16, 32, and 64

Default: Auto

Sets the oversampling ratio of the selected carrier. The icon at the right edge of the entry box displays a drop-down list with all available selections. 

Filter

Displays the filter type selection and the appropriate filter parameters for the selected carrier.

The filter type and parameters may be changed using the filter entry when the icon is displayed. If the icon is displayed, click it to expand the Filter selection area allowing you access to the filter selections and parameters.  

Filter

Sets the baseband filter type. The icon at the right edge of the entry box displays a drop-down list with all available selections. 

Range: None, Root Nyquist, Nyquist, Rectangle,Gaussian, IS95 STD, IS95 STD EQ, IS95 ACP, IS95 ACP EQ, IS95 EVM EQ

Default: IS95 STD EQ

If the overSampling ratio is set to 1, the filter type is automatically set to None, and the filter types and corresponding filter parameters are not available.

If the oversampling ratio is set to any other value, you can select one of the listed filter types and edit the associated parameters.

Alpha

Range: Filter factor for Nyquist and Root Nyquist filters

Default: 0.22

Changes the Alpha parameter for Root Nyquist and Nyquist filters. This field is inactive with other filter selections.

BbT

Range: Filter factor for Gaussian filter

Default: 0.5

Changes the BbT parameter for a Gaussian filter. This field is inactive with other filter selections.

Pre-Filter Clipping

Range: 10% – 100%

Default: 100%

Sets the circular clipping percentage for each carrier prior to finite impulse response (FIR) filtering of the I and Q data. Clipping limits power peaks in waveforms by clipping the I and Q data to a selected percentage of its highest peak. Circular clipping is defined as clipping the composite I/Q data (I and Q data are equally clipped). For more information, see Understanding Waveform Clipping. A level of 100.0% equates to no clipping.

Post-Filter Clipping

Range: 10% – 100%

Default: 100%

Sets the circular clipping percentage for each carrier after finite impulse response (FIR) filtering of the I and Q data. Clipping limits power peaks in waveforms by clipping the I and Q data to a selected percentage of its highest peak. Circular clipping is defined as clipping the composite I/Q data (I and Q data are equally clipped). For more information, see Understanding Waveform Clipping. A level of 100.0% equates to no clipping.

Total Sample Points

Displays the length of the waveform in sample points. You cannot edit this cell. Total Sample Points is directly related to the Oversampling Ratio value selected. The higher the oversampling ratio, the larger the number of waveform sample points. Oversampling Ratio–Total Sample Points Details…

Frequency Offset

Range: –37.5 to 37.5 MHz

Default: 0.000000 Hz

Sets the frequency offset for the carrier relative to the signal generator's frequency setting. This parameter is coupled with Oversampling Ratio.

Power

Range: –40 to 0 dB

Default: 0.00 dB

Sets the carrier's power relative to the signal generator's amplitude setting.

Timing Offset

For EV-DO carriers

Range: 0 – 149

Default: 0

Sets the timing offset of the carrier. The timing offset values increment by 1 chips. Physical channels summed in phase produce a high crest factor (high peak-to-average ratio). Offsetting the timing can minimize the crest factor.

For the other carriers

Range: 0 – 149

Default: 0

Sets the timing offset of the carrier. The timing offset values increment by 512 chips. Physical channels summed in phase produce a high crest factor (high peak-to-average ratio). Offsetting the timing can minimize the crest factor.

Initial Phase

Range: 0 – 359 Deg

Default: 0 Deg

Sets the initial phase (in degrees) of the carrier.

PN Offset

Range: 0 to 511

Default: 0

Sets the Pseudo Noise (PN) offset for the selected channel.

Related Topics

WFM "N"

Channel Setup