HP Cell Phone Accessories E6380-90019 Manual Do Utilizador
Chapter 4
99
CDMA Measurements - Screens and Control Fields
Data Source
Data Source
Data Source
This field selects where the baseband quadrature spreader gets its
data. This field is removed when the
data. This field is removed when the
Gen Mode
field is set to
Noise
.
•
Zeroes
uses a data stream of all 0’s that is not encoded before being
applied to the baseband quadrature spreader and output.
•
Ext
uses external data from the DATA IN connector. This data is not
encoded before being applied to the baseband quadrature spreader.
•
Random
uses 300 frames of random, error-free data. (See
Data Buff
(below) for
Single/Cont
,
Idle/Send
operation.)
•
Data Buff
uses data previously loaded into the data buffer. You can
load your own data into the buffer over HP-IB. This data is encoded
before baseband quadrature spreading. Choosing this selection
displays these additional fields:
before baseband quadrature spreading. Choosing this selection
displays these additional fields:
• Single/Cont
•
Single
causes the data stream to be output once when
Send
is selected.
•
Cont
causes the data stream to be repeated continuously when
Send
is selected. Changing to single operation while sending
causes the data to be interrupted after the current 20 ms
frame.
frame.
• Send/Idle
•
Send
causes the data stream to be output after two rising
edges of the internal 80 ms clock are detected.
•
Idle
indicates that data from the buffer is not being
transmitted. Selecting
Idle
while sending data interrupts the
data at the completion of the current 20 ms frame. A data
stream of all zeroes (encoded) continues to be transmitted after
the initial data stream is interrupted. This is different from
the
stream of all zeroes (encoded) continues to be transmitted after
the initial data stream is interrupted. This is different from
the
Zeroes
selection above where the data is not encoded.
•
Start Frame
specifies the first frame of data to send.
•
# of Frames
specifies how many frames of data to send.
Screens on which this field is present
CDMA GENERATOR
Main Menu