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Data (Normal 16QAM Burst - Advanced)

The Normal 16QAM 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 16QAM Burst)

Tail Bits 1 (12 bits)

Data

Training Sequence Bits (104 bits)

Tail Bits 2 (12 bits)

Guard Period (3n 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 16QAM Burst.

Normal 16QAM Burst Bits

1. Data (Normal 16QAM Burst)

Tail Bits 1 (12 bits)

Default: X"166"

Click the Details button in this cell to open the Data Source Selection window. Enter 12 bits to use in the first of the two tail bit segments of the normal 16QAM 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 (104 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 EGPRS2 16QAM All Timeslots Normal from the ClosedAdd New Carrier drop-down menu, 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.

Add New Carrier            

GSM All Timeslots Normal

All timeslots are configured as Normal GMSK bursts.

EDGE All Timeslots Normal

All timeslots are configured as Normal 8PSK bursts.

GSM 1 Timeslot Normal

Sets timeslot 0 as a normal GSM burst and timeslots 1 to 7 as custom GSM bursts.

EDGE 1 Timeslot Normal

Sets timeslot 0 as a normal EDGE burst and timeslots 1 to 7 as custom EDGE bursts.

GSM/EDGE Mixed All Timeslots Normal

GSM and EDGE Normal Bursts are mixed; alternating GMSK and 8PSK timeslots.

GSM Continuous

Continuous pattern with GMSK modulation.

EDGE Continuous

Continuous pattern with 8PSK modulation.

EGPRS2-A 16QAM All Timeslots Normal

All timeslots are configured as Normal 16QAM bursts.

EGPRS2-B HSR QPSK All Timeslots HB

All timeslots are configured as HSR (HB) QPSK burst.

EGPRS2-A 16QAM Continuous

Continuous pattern with 16QAM modulation.

EGPRS2-B QPSK Continuous

Continuous pattern with HSR (HB) QPSK modulation. 

Advanced GSM/EDGE/EGPRS2-A

Configures timeslot 0 with a coded TCH/FS and all timeslots use Normal GSMK bursts.

Advanced EGPRS2-B

Configures timeslot 0 with a coded UBS-6 and all timeslots use HB QPSK and 3PI/4 rotation.

If you manually change a timeslot to a Normal 16QAM Burst, the training sequence for that timeslot is automatically set to TSC0.

The training sequences are defined as follows:

TSC0

FF 3FF3 F333 FFFF 3FFF 3FF3 F333

TSC1

FF 3F33 F333 F333 3FFF 3F33 F333

TSC2

F3 FFFF 333F 333F 3FF3 FFFF 333F

TSC3

F3 FFF3 333F 33F3 FFF3 FFF3 333F

TSC4

FF F33F 3F33 3FF3 FFFF F33F 3F33

TSC5

F3 FF33 3F3F 33FF FFF3 FF33 3F3F

TSC6

3F 3FF3 3333 F33F FF3F 3FF3 3333

TSC7

33 3F33 33FF F3FF 3F33 3F33 33FF

Select User Defined Bits to define custom training sequence bits. See the Closeddrop-down figure.

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

Tail Bits 2 (12 bits)

Default: X"166"

Click the Details button in this cell to open the ClosedData Source Selection window. Enter 12 bits to use in the second of the two tail bit segments of the normal 16QAM burst.

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

Guard Period (36 bits)

Default: X"FFFFFFFFF"

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

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

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 33 bits (36-bit entry) with a default value of X”FFFFFFFFF”.

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.

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)