HP 8920B, Programmer'S Manual

Page: 488 / 682

488
Chapter 8, Programming The Call Processing Subsystem
Programming The CALL CONTROL Screen
Reading The Received Data Fields
To read the decoded data messages received
from the mobile station on the reverse control channel or reverse voice channel or
the raw data message bits displayed when a decoding error occurs, the control
program queries one, some, or all of the six received data fields. The information
in each field is returned exactly as displayed on the CRT. The information is
returned to the control program as a quoted string (“This is an example.”).
The received data fields are read only data fields.
The :RCDD1? through :RCDD6? query commands are used to read the contents
of the six received data fields.
Syntax
:RCDD<1-6>?
Example
OUTPUT 714;"CALLP:AMPS:RCDD1?"
ENTER 714;Rcv_data$
Setting the Display Field to Meas
When the
Display
field is set to
Meas
the top right-hand portion of the
CALL
CONTROL
screen is used to display modulation quality measurements made on the
mobile station’s RF carrier while on a voice channel.
• For system type AMPS, TACS, AND JTACS the following parameters are measured
when the Test Set is in the connect state. See
Figure 36, "CALL CONTROL Screen
with Meas Selected," on page 489 :
• TX Freq Error
• TX Power
• FM Deviation
• AF Frequency
• For system type NAMPS the following parameters are measured when the Test Set is
in the connect state. See
Figure 37, "CALL CONTROL Screen with NMeas Select-
ed," on page 490 :
• TX Freq Error
• TX Power
• FM Deviation
• DSAT/DST