Table of Contents
Advertisement
The display splits into two screens. After setup has been completed (see
step 3), the top shows the trace (yellow) with the ideal response in red.
The P1dB measurement is shown in green. The bottom screen shows the
P1dB measurement results in real time.
The measurement results display a total of 31 points, incremented in 1 dB
steps from -30 dBm to 0 dBm. In each column the left side shows the input
power and the right side shows the gain. Gain marked in white is effective
gain, while gain marked in purple is ineffective gain. The results also list the
average gain, the output power at the P1dB point (Pout, 1 dB) and the input
power at the P1dB point.
Press P1dB Setup[F2] to set the P1dB settings.
Press Center Freq[F1] to set the center frequency:
Frequency: 0 ~ 3 GHz
Press Gain Offset[F2] to set the gain offset of the ideal linear response.
Gain: -99.00 dB ~ 99.00 dB
To help smooth the actual frequency response and measure the P1dB
compression point more accurately, press Average[F3] to set the average
number. This is especially useful if Start is set around -50 dB.
Average number: 1 ~ 200
Press Start[F4] to set the "starting" output power for the P1dB
measurement.
Start: -50 dB ~ -5 dB
Press Reset[F5] to restart the P1dB measurement function.
February 2017
Figure 97.
130
Advertisement
Table of Contents
