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HP4402.book : chapter2.fm 43 Wed Apr 23 15:29:05 1997
Power Meter Operation
Recorder Output
HP EPM-442A User’s Guide 2-43
Recorder Output
The rear panel Recorder Output connector produces a dc voltage that
corresponds to the power level in Watts of the selected channel, depending
on the measurement mode. The Recorder Output is disabled (0 V) during
ratio, difference and relative measurements. 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 Output.
For example, the Recorder Output 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 2-13.
Figure 2-13: Test Setup for Recording Swept Measurements
To access the “Recorder” menu press , , .
This menu allows you to switch the Recorder Output signal either on or
off. The and softkeys allow you to enter the
input power level that you want to represent the 1 V
dc
maximum and
0V
dc
minimum output voltage of the Recorder Output. The
softkey allows you to select which channel is represented on the Recorder
Output.
Device
Power Meter
CHANNEL A
INPUT
OUT
X-Y Recorder
Swept Source
Under Test
IN
RF OUT
SWEEP
OUT
X-AXIS (FREQUENCY) Y-AXIS (POWER)
RECORDER
OUTPUT
System
Inputs
More
Recorder Output
Max Power Min Power
Output A B