Analog Transmit Power Troubleshooting

Possible Setup Issues

During remote operation of the Analog Transmit Power measurement, you should configure the Trigger Arm to Single. See SETup:ATXPower . If single triggering is used during manual operation, press the START SINGLE key to trigger each measurement.

If digital measurements are active, turn them off or set their trigger source to Immediate. See Triggering of Measurements .

The measurement results are altered by the Amplitude Offset value. See Amplitude Offset .

The expected signal amplitude and channel number (or frequency) must be specified for accurate measurements. See Active Cell Operating Mode , AVC Test Operating Mode , and Receiver Control for information on setting the expected input frequency and power level.

The trigger source is always immediate for the Analog Transmit Power measurement. No synchronization or external signals are required.

Over range and under range conditions may occur when testing a power class 4 mobile at power levels 0 or 1, or when testing a power class 1 mobile at power levels 8, 9, and 10 (digital mode only). See Under Range/Over Range Errors for an explanation of why this occurs and what to do about it.

Interpreting Integrity Indicator values

See Integrity Indicator .

If over range (5) is returned; the input power has exceeded the test set's internal sampler maximum value by at least 3 dB during some part of the sampling or the input power has exceeded the calibrated range of the test set's power detector for the expected power setting.

If under range (6) is returned; the Analog Transmit Power result is more than 10 dB below the expected input power level. Under range is also indicated if the input power is more than 2 dB below the calibrated range of the test set's power detector (-30 dBm).

If the signal has both over range and under range conditions only the over range (5) will be indicated.