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CDMA2000 Signaling
R&S
®
CMW-KM8xx/-KS8xx
460
User Manual 1173.9511.02 ─ 12
RF speech connection
●
In the CDMA2000 signaling, the routing to the speech codec is done via
= "Codec".
●
Audio measurement selects the coupled signaling application. Select the
CDMA2000 signaling as a controlling master application, to which the speech
codec is connected ("Controlled by" setting).
●
The event log monitors the connection to the speech codec board.
●
In the case of service option SO68, SO70 or SO73, configure the enhanced varia-
ble rate codec settings and initialize voice coder to apply the changes, see
. Changing and subsequently initializing of the
enhanced variable rate codec settings is possible also during the established voice
connection.
While the speech decoder detects the coding rate of the incoming speech packets
and can adapt to it, the speech encoder uses only the configured coding rate.
Analyze the audio signal e.g. by means of the "Speech" RX measurement (see
ter 4.3.13.8, "Speech View (Tab)"
on page 575) or the audio measurements applica-
tion. The CDMA2000 TX measurements evaluate the different characteristics of the
signal as well.
For the detailed information and test setups refer to the user manual of the audio mea-
surements application.
4.2.5 Hybrid Mode
In hybrid mode (option R&S CMW-KS888), the MS registers in CDMA2000
®
1xRTT
and opens a session in CDMA2000
®
1xEV-DO at the same time to support voice and
data services. As the MS monitors the control channels of each network, it is now pos-
sible to connect calls in either standard without reregistering or renegotiating a session.
While the mobile has an open traffic channel allocated for a CDMA2000
®
1xEV-DO
data call, the mobile continues to perform idle state procedures on the CDMA2000
®
1xRTT system. When it is time to decode the CDMA2000
®
1xRTT paging channel slot,
the mobile will tune to the CDMA2000
®
1xRTT frequency. If a paging request comes in
and the mobile's Data Dedicated Transmission Mode (DDTM) setting is OFF, the
mobile will transition the CDMA2000
®
1xEV-DO data call from a PPP connected state
to a PPP dormant state and process the incoming page request.
In addition, the mobile may have the ability to originate a CDMA2000
®
1xRTT voice
call during a CDMA2000
®
1xEV-DO data call, again putting the data call to dormant
state.
General Description
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