AMR Source

The following AMR Sources are available in the test set:

• Echo

  While in ECHO , the test set loops the transport blocks arriving from the UE on the uplink back down to the UE (unaltered) on the downlink. There is a fixed voice echo delay of 0.5 seconds.

• Real-Time Vocoder
• External 8960

  While in External 8960, the traffic data is routed from one UE through an 8960, over the LAN interface to a second 8960 and then to the second UE. The data flow is bidirectional and so the behaviour at each UE is like that of a real speech call.

• PESQ

  While in PESQ (Perceptual Evaluation of Speech Quality), the test set generates the speech signal which complies with the ITU-T P.862 standard for the Perceptual Evaluation of Speech Quality measurement. See Perceptual Evaluation of Speech Quality (PESQ) Measurement Description .

GPIB command: CALL:SERVice:AMR:SOURce

This parameter can only be set when call/data status is idle.

AMR Radio Access Bearer

The AMR Radio Access Bearer can be set to:

• 12.2k Voice (3GPP TS 34.108 s6.10.2.4.1.4)
• 10.2k Voice(3GPP TS 34.108 s6.10.2.4.1.5)
• 7.95k Voice (3GPP TS 34.108 s6.10.2.4.1.6)
• 7.4k Voice (3GPP TS 34.108 s6.10.2.4.1.7)
• 6.7k Voice (3GPP TS 34.108 s6.10.2.4.1.8)
• 5.9k Voice (3GPP TS 34.108 s6.10.2.4.1.9)
• 5.15k Voice(3GPP TS 34.108 s6.10.2.4.1.10)
• 4.75k Voice (3GPP TS 34.108 s6.10.2.4.1.11)
• Multi-rate AMR - 12.2k Voice, 7.95k Voice, 5.9k Voice, 4.75k Voice (34.108 v8.0.0 s6.10.2.4.1.4a)
• Multi-rate Wideband AMR - 12.65k Voice, 8.85k Voice, 6.6k Voice (25.993 v7.4.0 s7.1.106)
• Multi-rate Wideband AMR - 15.85k Voice, 12.65k Voice, 8.85k Voice, 6.6k Voice (25.993 v7.4.0 s7.1.107)
• Multi-rate Wideband AMR - 23.85k Voice, 12.65k Voice, 8.85k Voice, 6.6k Voice (25.993 v7.4.0 s7.1.108)

GPIB command: CALL:SERVice:AMR:RAB

This parameter can only be set when call/data status is idle. Note: "k" refers to kbps.

AMR Voice SRB

This setting specifies the data rate of DCCH used for AMR voice connection when AMR Radio Access Bearer is set to 5.15k Voice or 4.75k Voice .

• when set to BPS1700 , the TTI for DCCH is set to 80ms.
• when set to BPS3400 , the TTI for DCCH is set to 40ms.

GPIB command: CALL:SERVice:AMR:SRB

This parameter can not be changed in Active Cell operating mode and the Call/Data Status is not Idle .

Related Topics

Manual Operation: How Do I Configure the AMR Radio Access Bearer?

AMR Voice Ladder Diagrams

Downlink Channel Codes and Levels

Current Service Type

Establishing a Connection with the UE

Paging Service