Anritsu 682XXB - Manual (Page 94)

Unlocked Wide FM Mode
1. Set up the 682XXB/683XXB as follows:
a. Reset the instrument by pressing SYSTEM ,
then Reset . Upon reset, the CW Menu is dis-
played.
b. Press Edit F1 to open the current frequency
parameter for editing.
c. Set F1 to 5.0 GHz.
2. Set up the Spectrum Analyzer as follows:
a. CF: 5.0 GHz
b. Span/Div: 50 MHz (500 MHz across the dis-
play)
3. On the 682XXB/683XXB, make the following set-
tings:
a. Press MODULATION , then FM . At the result-
ing FM Status menu, press More to go to the
additional FM Status menu.
b. At the additional FM Status menu, press
Unlocked Wide , then press Previous Menu to
return to the main FM Status menu.
c. At the FM Status menu, press Mod. Wave to
go to the Modulation Waveform Selection
menu. Use the cursor control key to highlight
the squarewave modulation waveform, then
press
Select .
d. Press Previous Menu to return to the FM
Status menu, then press Edit Dev. and set the
deviation to 100 MHz. Press Edit Rate and set
the rate to 0.4 Hz.
e. Press On/Off to turn FM on.
4. On the Spectrum Analyzer, change the Span/Div
setting to 5 MHz to use the analyzer as a fre-
quency counter.
a. Adjust the center frequency control to position
the low carrier at the center of the display. Re-
cord the frequency reading on the Test Record.
b. Adjust the center frequency control to position
the high carrier at the center of the display.
Record the frequency reading on the Test Re-
cord.
3-34 682XXB/683XXB MM
PERFORMANCE FREQUENCY
VERIFICATION MODULATION TESTS