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Data (Coded E-TCH/F43.2–8PSK Burst - Advanced)

The E-TCH/F43.2 is a coded channel that is available with Option QFP.To open the Data node, click Data in the tree view. Use the Data window to define the bits in the bursts. The cells displayed in the Data node are determined by the Channel Type, as defined in the Timeslot window, for the selected timeslot.

The timeslots shown below are set to show some of the available timeslot (channel) types, not to show a typical test configuration.

Figure: Coded (E-TCH/F43.2) Data Node

1. Data (Normal GMSK Burst)

Tail Bits 1 (9 bits)

Data

Training Sequence Bits (78 bits)

Tail Bits 2 (9 bits)

Guard Period (2n bits)

2. Control Frame

Data for Control Frame

Change Data Values Button

Click to display a drop-down menu in which you can copy a timeslot configuration from one timeslot to another.

Data Node Parameters

Use the Data window to define the bits in the bursts. The cells displayed in the Data section are determined by the burst type (Timeslot Type) for the selected timeslot as defined in the Timeslots window. In the window shown above, Timeslot 0 is set up for a data cell with an Enhanced circuit switched full rate Traffic Channel that is coded for 43.2 kbit/s (E-TCH/43.2) Burst.

1. Data (Coded E-TCH/F43.2)

Tail Bits 1 (9 bits)

Click the Details Button in this cell to open the ClosedData Source Selection window. Enter 9 bits to use in the first of the two tail bit segments of the burst.

The buttons in this window are described in Marker Source Selection.

Import

Click Import to open a dialog box in which you can navigate to and import a pre-defined pattern file. The imported file automatically updates the user data entry area. The software accepts the following file types:

Export

Click Export to open a dialog box in which you can save the current data pattern to a file. You can save the data pattern as one of the following file types:

Clear

Click Clear to clear all data displayed in the user data entry area.

Insert PN9

Click Insert PN9 to insert a fixed psuedo-random bit sequence (pattern) containing 511 bits (29-1) into the user data entry area. The software generates this fixed pattern in accordance with the CCITT recommendation 0.153. You can click this button repeatedly to add additional PN9 sequences until the maximum file size is reached (65536 bits). If the maximum file size is exceeded, the software truncates the excess data. 

To edit the existing data pattern after reaching the maximum file size, insert the cursor at the desired point in the file and press Insert PN9 or use the keyboard 1 and 0 keys. The software inserts the data at the cursor position and truncates data in excess of 65536 bits.

Insert PN15

Click Insert PN15 to insert a fixed pattern psuedo-random bit sequence containing 32,767 bits (215-1) into the user data entry area. The software generates this fixed pattern in accordance with the CCITT recommendation O.153.

To edit the data pattern, insert the cursor at the desired point in the file and click Insert PN15, 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 65536 bits.

Data

Click the Details button in this cell to open the ClosedData Source Selection window. 

Select an encoded PN9, PN15 or ClosedUser Defined Bits. The selected data is coded continuously across the RLC data block per the 3GPP standards. An independent version of the selected data is coded across the unused RLC/MAC header fields.

The buttons in this window are described in Marker Source Selection.

Import

Click Import to open a dialog box in which you can navigate to and import a pre-defined pattern file. The imported file automatically updates the user data entry area. The software accepts the following file types:

Export

Click Export to open a dialog box in which you can save the current data pattern to a file. You can save the data pattern as one of the following file types:

Clear

Click Clear to clear all data displayed in the user data entry area.

Insert PN9

Click Insert PN9 to insert a fixed psuedo-random bit sequence (pattern) containing 511 bits (29-1) into the user data entry area. The software generates this fixed pattern in accordance with the CCITT recommendation 0.153. You can click this button repeatedly to add additional PN9 sequences until the maximum file size is reached (65536 bits). If the maximum file size is exceeded, the software truncates the excess data. 

To edit the existing data pattern after reaching the maximum file size, insert the cursor at the desired point in the file and press Insert PN9 or use the keyboard 1 and 0 keys. The software inserts the data at the cursor position and truncates data in excess of 65536 bits.

Insert PN15

Click Insert PN15 to insert a fixed pattern psuedo-random bit sequence containing 32,767 bits (215-1) into the user data entry area. The software generates this fixed pattern in accordance with the CCITT recommendation O.153.

To edit the data pattern, insert the cursor at the desired point in the file and click Insert PN15, 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 65536 bits.

To perform a receiver test with a continuous PN sequence, select PN9.

Training Sequence Bits (78 bits)

Default: TSCO

Click the Details button in this cell to open the ClosedData Source Selection window.

Select TSC0 to TSC7 or User Defined Bits to use for the training sequence bits.  

If you manually change a timeslot (channel type), the training sequence for that timeslot resets to TSC0 provided that the training sequence was not previously changed for the new channel type.

The training sequences selections are defined as follows:

TSC0

3F3F 9E49 FFF3 FF3F 9E49

TSC1

3F3C 9E49 E493 EE3C 9E49

TSC2

39FF F24F 24F3 F9FF F24F

TSC3

39FF 924F 279F F9FF 924F

TSC4

3FE4 F3C9 3F9F FFE4 F3C9

TSC5

39FC 93CF 27FF F9FC 93CF

TSC6

0F3F 9249 E4FF CF3F 9249

TSC7

093C 927F E7F3 C93C 927F

Select User Defined Bits to define Closedcustom training sequence bits.

The buttons in this window are described in Data.

Tail Bits 2 (9 bits)

Click the Details button in this cell to open the Data Source Selection. ClosedEnter 9-bits to use in the second of the two tail bit segments of the burst.

The buttons in this window are described in Tail Bits 1.

Guard Period (2n bits)

Click the Details button in this cell to open the ClosedData Source Selection window.

The buttons in this window are described in Marker Source Selection.

When the Timeslot Timing Mode is set to 157 symbols x 2 timeslots, 156 symbols x 6 timeslots, the Guard Period is defined as follows:

When the Timeslot Timing Mode is set to 156.25 symbols x 8 timeslots, the Guard Period is defined as follows:

The guard period in all timeslots has 27-bits with a default value of X”7FFFFFF”.

Control Frame

Data for Control Frame

Set the data for the control frame within a multiframe setup. Click the Details button in this cell to open the ClosedData Source Selection window. 

Select PN9, PN15 or User Defined Bits. Select User Defined Bits to Closedcreate a data string.

The buttons in this window are described in Marker Source Selection.

If the Multiframe type parameter at the Carrier n node is set to 13 Multiframe with idle frame, the Data for Control Frame parameter, while appearing as active, has no effect since there is no control frame.

Related Topic

Timeslot (Advanced)