Real Time

Marker Source Selection Dialog Box

When Parameter Optimization in the Signal Generator node is set to Auto, Marker 3 and Marker 4 source selection in the Waveform Setup node and the marker routing selected in the Dual Arb Marker Utilities are overridden.

To manually set Marker 3 and Marker 4 source, the marker routing, or both, set the Parameter Optimization to Off.

None

Sets all maker points are set to zero (inactive).

Frame

Sets the first five marker bits of the frame to 1, which sets an active marker for the first five waveform samples (waveform points). The signal generator outputs the Marker 1 output from the rear-panel Event 1 output.

RF ALC Control

Activates the automatic leveling control (ALC) function. When enabled, the ALC constantly monitors and controls the RF output power of the signal generator.

The ALC circuit cannot properly handle some modulation conditions, leading to output power level errors. In these conditions, turning the ALC off and using the signal generator power search function can achieve better power level accuracy.

RF Blanking Control

Assigns a specific marker to activate RF blanking. The automatic leveling control (ALC) hold is automatically enabled during output blanking.

RF Blanking Control improves the signal quality when the MAC channel and/or traffic channel are de-activated in a timeslot. It does so by increasing the on/off ratio of the forward link RF bursts.

When RF Blanking Control is enabled, the marker polarity must be set to positive or the wanted RF signal will be blanked, resulting in no RF output from the signal generator.

Timing Control

This marker is generated by the waveForm. IS95/2000 generates the first five waveform samples (waveform points) in the short code cycle. 1xEV-DO generates the half-slot timing.

User Defined Bits

Opens the user Closeddata entry area, which lets you customize the marker signal.

The user data area contains buttons to import, export, or clear user marker data along with the ability to insert a PN9 sequence as the marker bits. Optionally you can manually insert or delete marker data. To manually insert marker data, simply place the cursor within the data entry area or highlight existing bits, and insert bits. There are three ways to insert marker data:

(The key board shortcuts Ctrl+C and Ctrl+V work for user data entry.)

To delete data, simply place the cursor at the desired location within the data or highlight bits, and delete data. The key board short cut Ctrl+Z also deletes highlighted data.

The maximum number of marker bits for the user data entry area is 2,097,152 which equals 32,768 (1short code data points) * 64 (oversampling ratio). This is also the maximum file size.

The four buttons in the expanded area are:

Import

Loads a user-defined pattern from a selected location. When you select this button, the Open user defined data dialog box appears for navigating to and selecting the desired file. An imported file automatically updates the user data entry area. The software accepts the following file types:

The maximum file size is 2,097,152 bits. If the imported file is larger than bits, the software truncates the bits to conform to the maximum file size. 

Export

Saves the current data pattern, showing in the user data entry area, to a file. When you select this button, a Save user defined data dialog box appears for navigating to the location where you can save the file. The software saves the user data as one of the following selected file types:

Clear

Clears all data showing in the user data entry area.

Insert PN9

Inserts a fixed pattern pseudo-random bit sequence containing 511 bits (29–1) into the user data entry area. The software generates this fixed pattern in accordance with the CCITT recommendation O.153. Repeated clicking of this button adds additional PN9 sequences until the software attains the maximum file size of bits. The software truncates data in excess of the maximum file size. 

To edit the data pattern, insert the cursor at the desired point in the file and click Insert PN9, 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 2,097,152 bits.

The software lets you create a file larger than it uses for the waveform. When this occurs, the software truncates the excess marker bits. Conversely, if there are not enough marker bits, the software repeats the marker bit pattern until there are enough marker bits to match the Total Sample Points cell value.