49.Absolute Amplitude , Vernier, and Power Sweep Accuracy,HP 8591EM Option 010

This performance veri￿cation test must be performed with the EMC analyzer set in the spectrum analyzer mode.

The tracking generator output is connected to the EMC analyzer input and the tracking is adjusted at 300 MHz for a maximum signal level. A calibrated power sensor is then connected to the tracking generator output to measure the power level at 300 MHz.

The measuring receiver is set for RATIO mode so that future power level readings are in dB relative to the power level at 010 dBm. The output power level setting is decreased in 1 dB steps and the power level is measured at each step. The di￿erence between the ideal and actual power levels is calculated at each step.

Since a power sweep is accomplished by stepping through the vernier settings, the peak-to-peak variation of the vernier accuracy is equal to the power sweep accuracy.

The related adjustment for this procedure is \Modulator O￿set and Gain for Option 010, HP 8591EM."

Equipment Required

Measuring receiver

Power sensor, 100 kHz to 1800 MHz

Cable, Type N, 62 cm (24 in)

Procedure

1.Connect the Type N cable between the RF OUT 50 ￿ and INPUT 50 ￿ connectors on the EMC analyzer. See Figure 2-73.

2-322 Performance Veri￿cation Tests