System Operation When Data Spec Field Set To Std - HP 8920A User Manual

Chapter 6, Call Processing Subsystem
Using the CALL BIT Screen

System Operation When Data Spec Field Set to Std

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When the
Data Spec
messages by first examining the fields which contain the information needed to
build the messages (i.e. SID, BIS, SAT Tone, VMAC, etc.). After obtaining the
necessary information the Test Set builds the bit patterns according to the
signaling formats specified in the applicable industry standard.
For example: if the type of cellular system being emulated is AMPS and the
field on the CALL PROC screen was set to 231, the SID1 field in the System
Parameter Overhead Message (SPC WORD1) would be set to 00000001110011
(the 14 most significant bits of the system identification number) as defined by the
EIA/TIA-553 Mobile Station - Land Station Compatibility Specification.
When the
Data Spec
message(s) on the CALL BIT screen are updated with the bit patterns generated
using the signaling formats defined in the applicable industry standard whenever
that signaling message is sent to the mobile station. This feature allows a user to
set the field to
Data Spec
processing function, and view the bit patterns generated using the signaling
formats defined in the applicable industry standard.
It is important to note individual messages can be used more than once during a
messaging protocol. The contents of any message viewed on the CALL BIT
screen when the
Data Spec
for the last time the message was used in a messaging protocol.
For example: if the Call Processing Subsystem is in the active state and the user
selects the
Register
station. When the registration completes the Call Processing Subsystem returns to
the active state. The contents of some messages (such as the System Parameter
Overhead Message Word 1) will reflect the correct settings for the active state, not
the register state, since the messages are currently being used in the active state.
field is set to the Test Set builds the signaling
Std
field is set to , the contents of the applicable
Std
, select a message of interest, perform a call
Std
field is set to
Std
field, a registration message will be sent to the mobile
will reflect the message contents
SID