Freedom R8000 Series, User Manual

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AutoTune for Motorola APX Series Radios User Guide
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6.1. Tx PA Bias
RF
Control
Port Frequency Modulation Attenuation
Monitor RF IN/OUT Test Frequency FM 40 dB
Table 6-1. Analyzer Configuration for Tx PA Bias alignment
6.1.1. Alignment
Note : This alignment requires an external current meter (Freedom part # USB-CS) to
perform.
APX 8500 Mobiles : The Tx PA Bias alignment adjusts the radio power amplifier
voltages. The radio is placed into Test Mode, radio PA Bias is toggled, and baseline
current is measured. If sufficient, the radio PA bias is toggled and the current measured
again. The radio softpot is adjusted until the difference between the baseline and
measured current is about the same as the values shown in APX Family Tuner. The
process is repeated for remaining test frequencies. The final results are written to the
log file.
APX Mobiles : The Tx PA Bias alignment adjusts the radio power amplifier voltages.
The radio is placed into Test Mode baseline current is measured. If sufficient, the radio
PA bias is enabled and the current measured again. The radio softpot is adjusted until
the difference between the baseline and measured current is about the same as the
values shown in APX Family Tuner. The process is repeated for remaining test
frequencies and then the bias is disabled. The final results are written to the log file.
Name Description
Result Pass or Fail. Power within Min, Max Limits to Pass
PA Power amplifier number
Frequency Test Frequency
Bias Target current bias, in mA
Min Limit Minimum limit (inclusive) for Bias current for Results to be a Pass
Max Limit Maximum limit (inclusive) for Bias current for Results to be a Pass
Error Percent error between Bias and (Max Limit+Min Limit)/2 target
Old Softpot Original radio softpot setting
New Softpot Radio softpot after alignment
Table 6-2. Tx PA Bias alignment results