HP 8920A - Display

127
Chapter 6, Call Processing Subsystem
The CALL CONTROL Screen
Display
This field is used to select the type of mobile station information to be displayed
in the upper right-hand portion of the CALL CONTROL screen:
• Select Data to display information received from the mobile station on the reverse
control channel or reverse voice channel. If the data message(s) received from the
mobile station can be correctly decoded, the decoded message contents are displayed.
If the data messages cannot be correctly decoded, the raw data message bits are
displayed in hexadecimal format. Figure 19 on page 128 shows the layout of the CALL
CONTROL screen when a decoding error has occurred.
The decoded order confirmation message, origination message, and order message are
available from the reverse control channel. The following pieces of information are dis-
played when these messages are properly decoded: phone number, ESN (dec), ESN (hex),
the decoded Station Class Mark (SCM), and the called number. The decoded SCM con-
sists of: the mobile station power class (Class I, II, or III), the transmission type (continu-
ous/discontinuous), and the transmission bandwidth (20 MHz or 25 MHz).
• The decoded Order Confirmation Message is available from the reverse voice chan-
nel.
• Select Meas to display modulation quality measurements made on the mobile station’s
RF carrier while on a voice channel.
• and
For system types AMPS, TACS, JTACS, and wide channel NAMPS four characteristics
of the RF carrier are measured: TX Freq Error, TX Power, FM Deviation, and AF Fre-
quency. When set to the Meas display, the AF Analyzer’s settings are 300 Hz HPF, 15
kHz LPF, De-Emphasis Off, PK+ detector. The Meas information is available only when
the Test Set’s Connect annunciator is lit (connect state). Refer to the individual field
descriptions for further information. Figure 20 on page 129 shows the layout of the
CALL CONTROL screen when Meas is selected.
For system type NAMPS with Ch Loc: set to Lower, Middle, or Upper, four characteris-
tics of the RF carrier are measured: TX Freq Error, TX Power, FM Deviation, and DSAT/
DST. When set to NMeas display, the AF Analyzer’s settings are: 300 Hz HPF, 15 kHz
LPF, De-Emphasis 750 µs, PK+ detector. The NMeas information is available only when
the Test Set’s Connect annunciator is lit (connect state). Refer to the individual field
descriptions for further information. Figure 21 on page 130 shows the layout of the
NAMPS CALL CONTROL screen when NMeas is selected.