Real Time

Data (Normal 8PSK Burst - Advanced)

The Normal 8PSK Burst - Advanced is a coded channel that is available with Option QFP. To open the Data node, click Data in the tree view. The figure below shows the Data node. 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 all of the available timeslot types, not to show a typical test configuration.

1. Data (Normal 8PSK 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 selected, so the data cells provided are for setting up a Normal EDGE Burst (the 8-PSK and 3p/8 rotation modulation indicates that this is an EDGE burst).

Normal 8PSK Burst Bits

1. Data (Normal 8PSK Burst)

Tail Bits 1 (9 bits)

Default: X"1FF"

Click the Details button in this cell to open the Data Source Selection. Enter 8 bits to use in the first of the two tail bit segments of the 8PSK burst. See Closeddrop-down figure. 

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:

The maximum file size is 65536 bits. If the imported file is larger than 65536 bits, the software truncates the bits to conform to the maximum file size.

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

Choice: PN9 |PN15 | User Defined Bits

Default: PN9

Click the Details button in this cell to open the “Data source selection” window.

Please select PN9, PN15 or User Defined Bits for encrypted bits.

Select User Defined Bits, to create a custom data string. (See User Defined Bits description)

Training Sequence Bits (78 bits)

Choice: TSC0 to TSC7 | User Defined Bits

Default: TSC0

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

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

If you have selected 8QAM All timeslots HB from the Pre-defined Timeslot Configuration dialog, the default training sequence corresponds to the timeslot number. For example, the default for timeslot 0 is TSC0, the default for timeslot 1 is TSC1, and so on.

If you manually change a timeslot to an 8PSK Burst, the training sequence for that timeslot is automatically set to TSC0.

The training sequences 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 custom training sequence bits. See the Closeddrop-down figure.

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

Tail Bits 2 (9 bits)

Default: X"1FF"

Click the Details button in this cell to open the ClosedData Source Selection window. Enter 9 bits to use in the second of the two tail bit segments of the 8PSK burst.

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

Guard Period (2n bits)

Default: X"7FFFFFF"

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:

2. Control Frame

Data for Control Frame

Choice: PN9 |PN15 | User Defined Bits

Default: PN9

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.

With the Multiframe type selection of 13 Multiframe with idle frame, the Data for Control Frame setting, while appearing as active, has no effect since there is no control frame.

Related Topic

Timeslot (Advanced)