HP 8924C - Page 70

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S:\HP8924C\USRGUIDE\BOOK\chapters\opoverv.fb
Chapter 3, Operating Overview
Interaction Between Screens
Using your Test Set, duplicate the steps in figure 7 to demonstrate how the
priority fields operate.
Figure 7 Example of How Priority Fields Work
Table 3 Priority RX TEST and TX TEST Fields
Priority Field RX TEST TX TEST
RF Gen Amplitude Presets to −80 dBm (changeable) Always Off
AFGen1 To Presets to FM (changeable) Always Audio Out
AF Anl In Always Audio In Presets to FM Demod (changeable)
Detector Always RMS Presets to Pk +− Max(changeable)
De-emphasis Always Off Presets to 750µs (changeable)
AF Anl Measurement Presets to SINAD (changeable) Presets to Audio Freq (changeable)
-50
Amplitude
dBm
-50
Amplitude
dBm
-50
Amplitude
dBm
- 7 5
1. Access the RX TEST screen and set the
Amplitude to -50 dBm.
-50
Amplitude
dBm
-75
Amplitude
dBm
2. Access the RF GENERATOR screen and
set the Amplitude to -75 dBm.
3. Access the RX TEST screen. Notice that
the Amplitude changes back to -50 dBm.
2. Return to the RF GENERATOR screen.
The Amplitude is no longer where you set it
in step 2 (-75 dBm).
Since the RX TEST screen has priority control over this field, the RF GENERATOR screen’s
Amplitude setting changed when RX TEST was accessed.