Agilent Technologies E8285A manual Using the Call BIT Screen, General Syntax

Chapter 3, Description of Screens

Call Control Screens

Using the CALL BIT Screen

Using the CALL BIT screen requires expert knowledge of the call processing messaging protocols used in the system selected in the System Type field on the CALL CONTROL screen.

The CALL BIT screen should not be used to change any parameter that can be set on any other Call Processing Subsystem screen. The contents of the applicable fields on the CALL CONTROL screen and the CALL CONFIGURE screen are not updated to reflect any changes made while using the CALL BIT screen. There is no coupling between the CALL BIT screen and the Test Set.

For example: changing the value of the SAT color code field (SCC) in the forward control channel mobile station control message (MS IntVCh) does not change the setting of the SAT: field on the CALL CONTROL screen.

When using the CALL BIT screen the user is responsible for setting the contents of all messages used in a messaging protocol. When using the CALL BIT screen, the Call Processing Subsystem sends the correct messages at the correct times as defined in the applicable industry standard. Message content is the responsibility of the user.

When the CALL BIT screen is displayed and the Call Processing Subsystem is in the connected state, the Test Set constantly monitors the station’s transmitted carrier power. If the Power falls below 0.0005 Watts, the error message RF Power Loss indicates loss of Voice Channel will be displayed and the Test Set will terminate the call and return to the active state.

NOTE:In order to ensure that the Test Set makes the correct decisions regarding the presence of the mobile stations’s RF carrier, the Test Set’s RF power meter should be zeroed before using the Call Processing Subsystem. Failure to zero the power meter can result in erroneous RF power measurements.

The field descriptions for each of the messages are given in the "Display Word" on page 232.

Reading the CALL BIT Screen Message Fields This section provides programming information on how to read the contents of individual fields in the signaling messages available on the CALL BIT screen.

The syntactical structure for reading the contents of one or more fields from an individual message is as follows:

General Syntax

CALLP:<message name>:<field name><?>[<;><additional field><?>]

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