Real Time

Data (Custom 8PSK Burst)

To open the Data node, click Data in the tree view. The figure below shows the Data node.

Data (Custom GMSK Burst)

Data Bits (444 bits)

Guard bits (24 or 27 bits)

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

Custom 8PSK Burst Bits

Data Bits (444 bits)

Click the Details button in this cell to open the ClosedData Source Selection window. Select PN9, PN15 or User Defined Bits to use for the data bits.

If you select User Defined Bits, the window expands as shown below.

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.

Guard Bits (n bits)

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

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 on the Carrier node is 156.25 symbols x 8 timeslots, the Guard Period is defined as follows: