How Do I Change the EGPRS Modulation Coding Scheme?

Last updated: December 2, 2008

This section is not applicable to GSM or GPRS.

There are two ways to change the EGPRS downlink and uplink Modulation Coding Schemes (MCS):

• B. Change the MCS immediately
• C. Change the MCS during a handover

Both are explained below.

B. Change the MCS immediately

1. Press the CALL SETUP key.
2. Press the PDTCH Parameters ( F9 ) key.
3. Press the Modulation Coding Scheme ( F11 ) key.
4. Select either Downlink Modulation Coding Scheme or Uplink Modulation Coding Scheme and set the value you want. The modulation format is different depending on the MCS you select:
   • MCS-1 through MCS-4 use a GMSK modulation format.
   • MCS-5 through MCS-9 use an 8PSK modulation format.
5. Press the Close Menu ( F6 ) key.

C. Change the MCS during a handover

1. Press the CALL SETUP key.
2. Press the Handover Parameters ( F5 ) key.
3. Press the EGPRS Handover Setup .
4. Select either Downlink Modulation Coding Scheme or Uplink Modulation Coding Scheme and set the value you want. The modulation format is different depending on the MCS you select:
   • MCS-1 through MCS-4 use a GMSK modulation format.
   • MCS-5 through MCS-9 use an 8PSK modulation format.
5. Press the Handover Execute ( F5 ) key to change the MCS, or press the Close Menu ( F6 ) key to leave the MCS unchanged.
6. After the handover is executed, press the PDTCH Parameters ( F9 ) key, then Modulation Coding Scheme ( F11 ) to check that the MCS has been changed.