Expected Power

In Active Cell Operating Mode

In active cell mode, by default, receiver power control is set to auto (see Receiver Control ). In this mode, expected power is used to set the measurement and demodulation receiver powers. Expected power is calculated by the test set based on the power contained in one slot, and is displayed as Expected Terminal Power on the measurement screen for digital average power, channel power, and access probe power when the test set is configured to RTAP (see Test Application Protocol ), RETAP (see Enhanced Test Application Protocol ) or RMCTAP (see Multi-carrier Test Application Protocol ). Expected power is determined by adding the power of all of the reverse channels in the access terminal's signal (the power in each of the reverse channels is determined by the open loop power control equation). Which reverse channels contain power varies according to the current Release A Physical Layer Subtype or Release B Physical Layer Subtype and the state of the data connection, as shown in the following figures.

Expected Power Ranging Diagram for Subtype 0 Physical Layer

Expected Power Ranging Diagram for Subtype 2 and Subtype 3 Physical Layer

The expected power for each of these three states of the data connection is as follows:

The power of each of the reverse channels is calculated as follows:

• R-Pilot

  R-Pilot (dBm) = - [ Total RF Power (dBm) + AT Noise Floor (dBm)] + [- Open Loop Adjust (dB)] + Probe Initial Adjust (dB)

  • Subtype 0: Probe Initial Adjust (dB) = Probe Initial Adjust
  • Subtype 2 and Subtype 3: Probe Initial Adjust (dB) = Probe Initial Adjust + Pilot Strength Correction, where
    Pilot Strength Correction = min (Pilot Strength Correction Max, max (Pilot Strength Nominal - Pilot Strength, Pilot Strength Correction Min))
    Because the Pilot Strength Correction Max, Pilot Strength Nominal, Pilot Strength and Pilot Strength Correction Min are fixed to 0 dB in the test set (see Fixed Settings ), so Pilot Strength Correction = 0 dB. So, Probe Initial Adjust (dB) = Probe Initial Adjust

• R-Access Data

  • Subtype 0, Subtype 2 and Subtype 3 Preamble: R-Access Data (dBm) = R-Pilot (dBm) + Data Offset 9k6 + 3.75
    (because the R-Access Data is fixed at 9.6 kbps)
  • Subtype 2 and Subtype 3 Non-Preamble: R-Access Data (dBm) = R-Pilot (dBm) + Data Offset 9k6|19k2|38k4 + Gain Correction
    (R-Access data rate depends on the Enhanced Access Rate . See Data Offset Rate and Gain Correction Values for each Data Rate )

• R-DRC

  • Subtype 0: R-DRC (dBm) = R-Pilot (dBm) + DRC Channel Gain (dB)
  • Subtype 2 and Subtype 3: R-DRC (dBm) = R-Pilot (dBm) + DRC Channel Gain (dB) + DRC Channel Gain Boost (dB)
    (DRC Channel Gain Boost is fixed to 0 dB in the test set, see Fixed Settings )

• R-ACK

  R-ACK (dBm) = R-Pilot (dBm) + ACK Channel Gain (dB)

• R-DSC

  • Subtype 0: R-DSC (dBm) = R-Pilot (dBm) + DSC Channel Gain (dB)
  • Subtype 2 and Subtype 3: R-DSC (dBm) = R-Pilot (dBm) + DSC Channel Gain (dB) + DSC Channel Gain Boost (dB)
    (DSC Channel Gain Boost is fixed to 0 dB in the test set, see Fixed Settings )

• R-Data

  • Subtype 0: R-Data (dBm) = R-Pilot (dBm) + Data Offset Nom (dB) + Data Offset 9k6|19k2|38k4|76k8|153k6 (dB) + Gain Correction
    (see Data Offset Rate and Gain Correction Values for each Data Rate )
  • Subtype 2 and Subtype 3: R-Data (dBm) [Pre] = R-Pilot (dBm) + Current TxT2P Pre Gain (dB)
    R-Data (dBm) [Post] = R-Data (dBm) [Pre] (if Current T2P Transition = 3 and RETAP is configured), otherwise, R-Data (dBm) [Post] = R-Pilot (dBm) + Current TxT2P Post Gain (dB)
    (see Power Parameters Info for current TxT2P Pre-Transition and Post-Transition gain values)

• R-RRI

  • Subtype 0: R-RRI (dBm) = R-Pilot (dBm)
  • Subtype 2 and Subtype 3: R-RRI (dBm) [Pre] = R-Pilot (dBm) + Current RRI Channel Gain Pre-Transition (dB)
    R-RRI (dBm) [Post] = R-RRI (dBm) [Pre] (if Current T2P Transition = 3 and RETAP is configured), otherwise, R-RRI (dBm) [Post] = R-Pilot (dBm) + Current RRI Channel Gain Post-Transition (dB)
    (see RRI Gain Parameters for current RRI Channel Gain Pre-Transition and Post-Transition values)

• R-Aux Pilot

  Subtype 2 and Subtype 3 only: R-Aux Pilot (dBm) = R-Data (dBm) (for Subtype 2 and Subtype 3) + Auxiliary Pilot Channel Gain (dB)

The valid range for expected power is -69 dBm (see Input Signal Requirements ) to AT Max Power

In IS-856 Test Operating Mode

The test set currently does support protocol release A (1xEV-DO-A) in IS-856 test operating mode. The following section applies to the protocol release 0 (1xEV-DO-0) and release A (1xEV-DO-A).

In IS-856 test operating mode, when the Receiver Control is auto, expected power is used to set the measurement and demodulation receiver powers. Expected power is calculated by the test set, and is displayed on the measurement screen such as digital average power, channel power and access probe power.

The expected power for access channel and reverse traffic channel is as follows:

The power of each of the reverse channels is calculated as follows:

• R-Pilot

  R-Pilot (dBm) = - [ Total RF Power (dBm) + AT Noise Floor (dBm)] + [- Open Loop Adjust (dB)] + Probe Initial Adjust (dB)

  • Subtype 0: Probe Initial Adjust (dB) = Probe Initial Adjust
  • Subtype 2 and Subtype 3: Probe Initial Adjust (dB) = Probe Initial Adjust + Pilot Strength Correction, where
    Pilot Strength Correction = min (Pilot Strength Correction Max, max (Pilot Strength Nominal - Pilot Strength, Pilot Strength Correction Min))
    Because the Pilot Strength Correction Max, Pilot Strength Nominal, Pilot Strength and Pilot Strength Correction Min are fixed to 0 dB in the test set (see Fixed Settings ), so Pilot Strength Correction = 0 dB. So, Probe Initial Adjust (dB) = Probe Initial Adjust

• R-Access Data

  • Subtype 0, Subtype 2 and Subtype 3 Preamble: R-Access Data (dBm) = R-Pilot (dBm) + Data Offset 9k6 + 3.75
    (because the R-Access Data is fixed at 9.6 kbps)
  • Subtype 2 and Subtype 3 Non-Preamble: R-Access Data (dBm) = R-Pilot (dBm) + Data Offset 9k6|19k2|38k4 + Gain Correction
    (R-Access data rate depends on the Enhanced Access Rate . See Data Offset Rate and Gain Correction Values for each Data Rate )

• R-DRC

  • Subtype 0: R-DRC (dBm) = R-Pilot (dBm) + DRC Channel Gain (dB)
  • Subtype 2 and Subtype 3: R-DRC (dBm) = R-Pilot (dBm) + DRC Channel Gain (dB) + DRC Channel Gain Boost (dB)
    (DRC Channel Gain Boost is fixed to 0 dB in the test set, see Fixed Settings )

• R-ACK

  R-ACK (dBm) = R-Pilot (dBm) + ACK Channel Gain (dB)

• R-DSC

  • Subtype 0: R-DSC (dBm) = R-Pilot (dBm) + DSC Channel Gain (dB)
  • Subtype 2 and Subtype 3: R-DSC (dBm) = R-Pilot (dBm) + DSC Channel Gain (dB) + DSC Channel Gain Boost (dB)
    (DSC Channel Gain Boost is fixed to 0 dB in the test set, see Fixed Settings )

• R-Data

  • Subtype 0: R-Data (dBm) = R-Pilot (dBm) + Data Offset Nom (dB) + Data Offset 9k6|19k2|38k4|76k8|153k6 (dB) + Gain Correction
    (see Data Offset Rate and Gain Correction Values for each Data Rate )
  • Subtype 2 and Subtype 3: R-Data (dBm) [Pre] = R-Pilot (dBm) + Current TxT2P Pre Gain (dB)
    R-Data (dBm) [Post] = R-Data (dBm) [Pre] (if Current T2P Transition = 3), otherwise, R-Data (dBm) [Post] = R-Pilot (dBm) + Current TxT2P Post Gain (dB)
    (see Power Parameters Info for current TxT2P Pre-Transition and Post-Transition gain values)

• R-RRI

  • Subtype 0: R-RRI (dBm) = R-Pilot (dBm)
  • Subtype 2 and Subtype 3: R-RRI (dBm) [Pre] = R-Pilot (dBm) + Current RRI Channel Gain Pre-Transition (dB)
    R-RRI (dBm) [Post] = R-RRI (dBm) [Pre] (if Current T2P Transition = 3), otherwise, R-RRI (dBm) [Post] = R-Pilot (dBm) + Current RRI Channel Gain Post-Transition (dB)
    (see RRI Gain Parameters for current RRI Channel Gain Pre-Transition and Post-Transition values)

• R-Aux Pilot

  Subtype 2 and Subtype 3 only: R-Aux Pilot (dBm) = R-Data (dBm) + Auxiliary Pilot Channel Gain (dB)

In CW Operating Mode

In CW operating mode, you must specify the CW expected power that the test set should range its receiver to (see Receiver Control ).

Range of Expected power

• The valid minimum value: -69 dBm (see Input Signal Requirements )
• The valid maximum value:
  • If the Protocol Rel is set to B (1xEV-DO-B) , the Release B Physical Layer Subtype is set to Subtype 3 and the Local Testset Configuration is set to Main or Auxiliary , the upper limit for expected power is calculated by: AT Max Power - Multicarrier AT Max Power Backoff - 0dB/3dB/4.77dB (depends on the value of Connected Carriers , 0dB for 1 connected carrier, 3dB for 2 connected carriers and 4.77dB for 3 connected carriers).
  • For other cases, the valid maximum value is AT Max Power .

Range of Expected Terminal Total power