Agilent Technologies 54503A User's Guide Page 119

  • Download
  • Add to my manuals
  • Print
  • Page
    / 716
  • Table of contents
  • BOOKMARKS
  • Rated. / 5. Based on customer reviews
Page view 118
Chapter 2 119
Making Measurements
Example 9: Adjacent Channel Power Measurement
Set up the spectrum analyzer to display the signal before going to the
adjacent channel power softkeys.
1. Press
PRESET on the spectrum analyzer to start the measurement
from a defined preset state.
2. Press AMPLITUDE and set the reference level to the value of the
transmitter power that is being input to the spectrum analyzer. (You
may need to use an external attenuator.)
3. Press
FREQUENCY and set the center frequency to the center
frequency of the transmission channel that you want to measure.
Now the signal is displayed. Set up the ACP measurement before
executing it.
1. Press
MEAS/USER, ACP MENU and SETUP ACP to access the ACP
setup functions.
2. Press METHODS and 2BW METHOD to select the two bandwidth
measurement method. Press
PREV MENU.
3. Press
ACCELERAT. Check that the ACCELERAT NORMAL function is
selected. The normal setting is required to measure to the standard.
You can use faster measurement methods, but the results would not
agree completely with the standards. Press
PREV MENU.
4. Press
SPACING/BANDWDTH and CHANNEL SPACING, and set the
spacing to 50 kHz. ( Table 2-5 on page 118 shows the settings for
some other formats.)
5. Press
CHANNEL BANDWDTH and set the bandwidth to 21 kHz.
6. Press
# ALT CHANNELS and set it to 1. This will give you
measurement results for the adjacent channels and for the first
alternate channel pair. Press
PREV MENU.
7. Press the
BURST/WEIGHTNG softkey. Press BURST PERIOD and set
the period to 20 ms. Press
BURST WIDTH and set the width to 6.43
ms.
8. Press WEIGHTNG COS OFF so that off is selected. This turns off the
root-raised-cosine weighting function. Press
PREV MENU.
9. Press
ACPSTATE DFL CURR so that the default state (DFL) is
selected. This allows the spectrum analyzer to default to the
parameters considered best for the measurement. In this example,
and any in the table, the defaults are compatible with the standard.
Press
PREV MENU.
Page view 118
1 ... 118 119 120 ... 716

Comments to this Manuals

No comments