Cisco Systems UBR904 manual Event 3-Obtain Upstream Parameters

CMAC_LOG_RANGING_SUCCESS

CMAC_LOG_POWER_LEVEL_IS

Troubleshooting Tips

Event 3—Obtain Upstream Parameters

The cable modem waits for an upstream channel descriptor messages (UCD) from the headend Cisco uBR7246. This is done to retrieve transmission parameters for the upstream channel.

508146.124	CMAC_LOG_STATE_CHANGE	wait_ucd_state
508147.554	CMAC_LOG_UCD_MSG_RCVD	3
508147.558	CMAC_LOG_UCD_NEW_US_FREQUENCY	20000000
508147.558	CMAC_LOG_SLOT_SIZE_CHANGED	8
508147.622	CMAC_LOG_FOUND_US_CHANNEL	1
508147.624	CMAC_LOG_STATE_CHANGE	wait_map_state
508148.058	CMAC_LOG_MAP_MSG_RCVD
508148.060	CMAC_LOG_INITIAL_RANGING_MINISLOTS	40

Event 4—Start Ranging for Power Adjustments

The ranging process adjusts cable modem’s transmit power. The cable modem performs ranging in two stages, ranging state 1 and ranging state 2.

The field

modem to adjust to. The field successful.

is the power level that the Cisco uBR7246 told the cable indicates that the ranging adjustment was

508148.062	CMAC_LOG_STATE_CHANGE	ranging_1_state
508148.064	CMAC_LOG_RANGING_OFFSET_SET_TO	9610
508148.066	CMAC_LOG_POWER_LEVEL_IS	28.0	dBmV (commanded)
508148.068	CMAC_LOG_STARTING_RANGING
508148.070	CMAC_LOG_RANGING_BACKOFF_SET	0
508148.072	CMAC_LOG_RNG_REQ_QUEUED	0
508148.562	CMAC_LOG_RNG_REQ_TRANSMITTED
508148.566	CMAC_LOG_RNG_RSP_MSG_RCVD
508148.568	CMAC_LOG_RNG_RSP_SID_ASSIGNED	2
508148.570	CMAC_LOG_ADJUST_RANGING_OFFSET	2408
508148.572	CMAC_LOG_RANGING_OFFSET_SET_TO	12018
508148.574	CMAC_LOG_ADJUST_TX_POWER	20
508148.576	CMAC_LOG_POWER_LEVEL_IS	33.0	dBmV (commanded)
508148.578	CMAC_LOG_STATE_CHANGE	ranging_2_state
508148.580	CMAC_LOG_RNG_REQ_QUEUED	2
508155.820	CMAC_LOG_RNG_REQ_TRANSMITTED
508155.824	CMAC_LOG_RNG_RSP_MSG_RCVD
508155.826	CMAC_LOG_ADJUST_RANGING_OFFSET	-64
508155.826	CMAC_LOG_RANGING_OFFSET_SET_TO	11954
508155.828	CMAC_LOG_RANGING_CONTINUE
508165.892	CMAC_LOG_RNG_REQ_TRANSMITTED
508165.894	CMAC_LOG_RNG_RSP_MSG_RCVD
508165.896	CMAC_LOG_ADJUST_TX_POWER	-9
508165.898	CMAC_LOG_POWER_LEVEL_IS	31.0	dBmV (commanded)
508165.900	CMAC_LOG_RANGING_CONTINUE
508175.962	CMAC_LOG_RNG_REQ_TRANSMITTED
508175.964	CMAC_LOG_RNG_RSP_MSG_RCVD
508175.966	CMAC_LOG_RANGING_SUCCESS

12Release 11.3(4)NA