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Chapter 4, Description of Fields
Fields
Internal
This field selects the trigger source.
• Internal uses the signal being displayed for triggering.
• External uses the rear-panel EXT SCOPE TRIGGER INPUT for triggering. This is
a TTL level trigger (approximately 2.5 V).
• ENCODER uses the signaling encoder for triggering. The encoder must be sending its
signal to trigger the oscilloscope.
Screens Where Field is Present
OSCILLOSCOPE
Keep
This column in the CDMA Mobile Reporting table lists the “Keep” pilot indicator
bit from the Pilot Strength Message.
All numbers displayed in the CDMA Mobile Reporting table reflect the last pilot
strength message received from a mobile station. A Pilot Strength Message is sent
from the mobile station when a Softer Handoff is executed, ended, or when the
mobile station detects a change in pilot levels that affects the assignment of pilots
to the mobile station’s Active, Candidate, or Neighbor sets.
The CDMA Mobile Reporting table can be cleared by selecting the Pilot Meas
(Clear) field.
Operating Considerations
If the “Keep” bit is zero, the mobile station’s handoff drop timer for that pilot has
expired. Otherwise, this bit will be a one.
GPIB Example
“DISP CMOB;CDMA:MOB:PIL:STR?“
queries the results displayed in the CDMA Mobile Reporting table.
The value returned by the Test Set includes Status, PN Offset, Strength, and Keep
for each pilot currently being tracked by the mobile station. These values are sent
as a comma-separated list of IEEE floating point numbers, 16 characters each,
ending with a line feed character.