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4 Using E9320 E-Series Power Sensors
132 N1911A/1912A P-Series Power Meters User’s Guide
Introduction
The E9320 E- Series power sensors have dual modes of operation.
• The normal mode is optimized for a wider bandwidth but with reduced
dynamic range. The instantaneous power of an RF signal can be
detected with, depending on the sensor type, up to 5 Mhz of video
bandwidth (modulation bandwidth). Use this mode to measure the peak
and average power of pulsed or modulated signals.
• The average- only mode is optimized for high accuracy and wide
dynamic range. Use this mode to measure the average power of signals
below the dynamic range of normal mode.
In normal mode the P- Series power meters and E9320 E- Series power
sensors continuously sample the RF signal at a 20 Msamples/s rate. A
trigger can be taken from a rising or falling edge of an RF signal pulse or
controlled externally via GPIB or TTL input.
N O T E
The term ‘video’ is applied here to a signal that has been amplitude demodulated from an
RF carrier but contains components in the RF part of the spectrum. For a power meter it
refers to the output of the sensor diodes in normal mode.
Table 4-10 Sensor Bandwidth
Video Bandwidth Setting
Sensor Low Medium High Off
E9321A
E9325A
30 kHz 100 kHz 300 kHz 300 kHz*
E9322A
E9326A
100 kHz 300 kHz 1.5 MHz 1.5 MHz*
E9323A
E9327A
300 kHz 1.5 MHz 5 MHz 5 MHz*
* The Low, Medium, and High settings provide flat filter responses with very sharp cutoff points by
applying digital signal processing techniques. The Off setting removes all signal conditioning. Refer
to
Figure 4-101 .