Harris Platinum Z2 CD, Руководство пользователя

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4-38 888-2406-002
WARNING: Disconnect primary power prior to servicing.
Overall System Theory
4.7.2.4 MAX HIGH, MAX LOW and UPS Power Levels
MAX HIGH, MAX LOW and UPS power levels are set using the Diagnostics
Display and stored in the EEPROM, U39.
MAX HIGH SET screen [HOME, MORE, CONFIGURATION B,B] sets the
maximum power level when the HIGH ON button is pressed.
MAX LOW SET screen [HOME, MORE, CONFIGURATION B,C] sets the
Maximum power level when the LOW ON button is pressed.
UPS SET Screen [HOME, MORE, CONFIGURATION B,D,A] sets the power level
when the transmitter is operating on a backup UPS or generator AC supply.
Once the operator has set a power level in kW in these screens, the controller uses
the OP_APC_Factor to find the DAC_APC_REF that would represent each of the
power levels and sets that number as the power level limit. This maximum
DAC_APC_REF setting is called DAC_MAX and is calculated for each mode from
the formulas below:
For HIGH ON mode:
DAC_MAX = MAX HIGH SET (kW) / APC_Factor
For LOW ON mode:
DAC_MAX = MAX LOW SET (kW) / APC_Factor
For UPS mode:
DAC_MAX = UPS SET (kW) / APC_Factor
DAC_MAX [HOME, MORE, CONFIGURATION C,B] is the display variable
which will contain one of the above numbers depending on which mode the
transmitter is in. Once these are set, the DAC_APC_REF in that mode can never go
above the DAC_MAX setting.
Example: If the transmitter is calibrated at 2kW (HIGH ON), and the desired MAX
Power setting is 2.4kW, this would be entered into the MAX HI SET screen.
Remember that for 2kW the nominal DAC_APC_REF is 660. The micro would
now use the formula:
DAC_MAX_HIGH = MAX HIGH SET (kW) / APC_Factor
DAC_MAX_HIGH = 2.4kW / 3.03 = 792