HP 8920A, User Manual

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S:\HP892XX\USRGUIDE\manual\acpscrn.fb
Chapter 4, Adjacent Channel Power Screen
Field Descriptions
Ch Offset
Use the channel offset field to enter the frequency difference between the
Tune
Freq
setting and the center of the adjacent channels you want to measure. This is
an absolute value; only positive values can be entered. See
figure 14
.
Ext TX key
This field controls a switch at the MIC/ACC connector. Use it to “key” an
external transmitter.
See Also
"MIC/ACC" on page 568
Input Atten
Input Attenuation sets the amount of input attenuation for the RF IN/OUT and
ANT IN connectors. This function controls two settings:
• The upper field determines if you want the instrument to set the attenuation automati-
cally (
Auto ), or if you want to set the value manually ( Hold ).
• The lower field displays the present attenuation value, and is used to set the desired at-
tenuation level when the upper area is set to
Hold .
Operating Considerations
Input Attenuator autoranging can interfere with oscilloscope or signaling decoder
operation under certain conditions.
See "Input Atten," in chapter 17, on page 475
for additional information.