Setting Access Parameters
Last updated: October 28, 2004
The Access Channel (R-ACH) is used by the mobile station to initiate communication with the base station or to respond to a mobile station directed messages. When the test set supports Access Channels (R-ACH) (see Control Channels Configuration ), the following access parameters can be specified and included in the Access Parameters Message ( Settable Fields in Overhead Messages ) sent to the mobile station on the Paging Channel.
If the mobile station uses Enhanced Access Channels (R-EACH) to initiate communication with the test set or to respond to a mobile station directed messages, the test set should be configured to support R-EACH (see Setting Enhanced Access Parameters for details).
IS-2000/IS-95 Access Parameters
The following access parameters are displayed under the Access Parameters menu (see C. Access Parameters or Enhanced Access Parameters ) when the following two conditions exist:
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- The Operating Mode field is set to Active Cell (see Active Cell Operating Mode ) or Cell Off, and
- IS-2000 or IS-95 is selected in the System Type field.
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- Nominal Power (NOM_PWR in the standards): an offset to the mobile station open loop power estimate to accommodate maximum transmit power of the cell. This parameter affects the initial access probe power level by introducing correction factors to the open loop estimate calculated by the mobile station. See CALL[:CELL]:APARameter:POWer:NOMinal[:OFFset] .
- Nominal Power Extended (NOM_PWR_EXT in the standards): an offset to the mobile station open loop power estimate to accommodate maximum transmit power of the cell. It is not applied in some band such as band classes 0 and 3. This parameter affects the initial access probe power level by introducing correction factors to the open loop estimate calculated by the mobile station. See CALL[:CELL]:APARameter:POWer:NOMinal:EXTended .
- Initial Power (INIT_PWR in the standards): an offset to the mobile station open loop power estimate for the first access probe in the access probe sequence. This parameter affects the initial access probe power level by introducing correction factors to the open loop estimate calculated by the mobile station. See CALL[:CELL]:APARameter:POWer:INITial .
- Power Step (PWR_STEP in the standards). This parameter specifies the step increase in mobile station transmit power between each access probe within an access probe sequence. See CALL[:CELL]:APARameter:POWer:STEP[:LEVel] .
- Number of Steps (NUM_STEP in the standards): This parameter specifies the number of steps in one access probe sequence. See CALL[:CELL]:APARameter:POWer:STEP:COUNt .
- Maximum Request Sequence (MAX_RESP_SEQ in the standard): This parameter specifies the maximum number of access probe sequences for an access channel request (see CALL[:CELL]:APARameter:SEQuence:REQuest[:MAXimum] ).
- Maximum Response Sequence (MAX_RSP_SEQ in the standard): This parameter specifies the maximum number of access probe sequences the mobile station will transmit in response to a paging channel request (see CALL[:CELL]:APARameter:SEQuence:RESPonse[:MAXimum] ).
- Preamble Size (PAM_SZ in the standards). (see CALL[:CELL]:APARameter:PREamble )