Power Meter Operation

Recorder Outputs

Recorder Outputs

The rear panel Recorder Output connectors (A and B) produce a dc voltage that corresponds to the power level in Watts of the channel, depending on the measurement mode. This dc voltage ranges from 0 to +1 Vdc. The output impedance is typically 1 kΩ . Channel and display offsets, and duty cycle have no effect on the Recorder Outputs.

For example, the Recorder Outputs can be used to;

record swept measurements on an X-Y recorder

level an output from a source using external leveling, or

monitor the output power on a strip chart recorder. A setup for recording swept measurements is shown in Figure 2-20.

See Figure 2-22 for details on which power meter functions are implemented in the recorder output.

Figure 2-21: Test Setup for Recording Swept Measurements

 

 

 

 

RECORDER

Swept Source

Device

 

OUTPUT A

 

 

 

 

Under Test

 

SWEEP

RF OUT

IN

OUT

Power Meter

OUT

 

 

 

 

 

X-Y Recorder

CHANNEL A

 

 

INPUT

 

X-AXIS (FREQUENCY)

 

 

 

Y-AXIS (POWER)

 

 

 

 

 

 

 

 

 

 

 

To access the “Recorder” menu press

System

,

 

,

More

Inputs

 

 

Recorder Output

,

Channel A

or

 

Channel B

depending on which

channel you want to set up. This menu allows you to switch the Recorder Output signal either on or off. The Max Power and Min Power softkeys allow you to enter the input power level that you want to represent the 1 Vdc maximum and 0 Vdc minimum output voltage of the Recorder Output.

HP E4419B User’s Guide

2-65

Page 105
Image 105
HP Saw E4419B manual Recorder Outputs, Test Setup for Recording Swept Measurements