Configuring the Forward Fundamental/Traffic Channel (F-FCH/Traffic)

Settable F-FCH/Traffic Parameters

• Level and state. See CALL[:CELL[1]]:FCHannel[:FORWard][:SLEVel]<[:SELected]|DIGital2000> and Configuring Forward Channel Power Levels and Walsh Codes .
• Walsh code (call status state must be idle). See CALL[:CELL[1]]:FCHannel[:FORWard]:WALSh .
• Data Rate (applies when a loopback service option (SO2, 9, or 55) is selected.) See Traffic Data Rate .
• Voice SO Mode (applies when a voice service option (SO1, 3, 17, 68 or 32768) is selected). See Voice SO Mode and CALL[:CELL[1]]:FCHannel[:FORWard]:SOURce .
• Echo Delay (applies when Voice SO Mode is set to voice echo, see Voice SO Mode ). See CALL[:CELL[1]]:TRAFfic[:FORWard]:SOURce:ECHO .
• RL Traffic to Pilot Gain (RLGAIN_TRAFFIC_PILOT) (for IS-2000 system RC3 and above): see Setting Cell Parameters .

Operating Considerations

Both fundamental channel (IS-2000 system) and traffic channel (IS-95 system) use the same command CALL[:CELL[1]]:TRAFfic[:FORWard]:DRATe to set the data rate.

When changing F-FCH/Traffic Walsh codes, the call processing state must be idle.

If the data rate is changed while a voice service option (SO1, SO3, SO17, SO68 or SO32768) is selected, the data rate value will be stored for use when a loopback service option is selected.

If the audio tone is changed while a loopback service option is selected, the audio tone value will be stored for use when a voice service option is selected.

If the echo delay time is changed while the audio tone is not voice echo, the delay time value will be stored for use when audio tone is set to voice echo.

Parameters can be queried from the test set regardless of the state of the test set.

Related Topics

Manual Operation: How Do I Change F-FCH/Traffic Channel Parameters?

GPIB Commands: CALL:FCHannel (for IS-2000 System Type) or CALL:TRAFfic (for IS-95 System Type)

Configuring Forward Channel Power Levels and Walsh Codes