Anritsu MG3641A Benutzerhandbuch

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SECTION 4   OPERATING INSTRUCTIONS
4-27
For the external modulation input, you can select either DC coupling or AC coupling by following the procedure
detailed below:
(1) Press the "Src" [F4] key in the Modulation menu to open
the "Audio Source" menu.
(2) Select coupling display for Ext1 or Ext2 by operating
the "
↓" [F2], "↑" [F3], and "→" [F4] keys (the characters
are highlighted).
(3) Press the "Sel" [F1] key to change the setting.
Applying a signal at a voltage higher than 
±10 V to the "Ext1" or "Ext2" connector could result in breakdown
of the unit.  Be careful to prevent a signal level outside the limits from entering the unit.
CAUTION 
Modulation
[AM] 
[FM1] 
[FM2] 
[PM]
Off  Int1 
Off  Int1 
Off  Int1 
      600 
Ω
Sel
Rtn

Hz 
Hz
0.0 

0
Src
Off
1
Audio Source
[Int1] 
[Int2] 
[Int3] 
[Ext1] 
[Ext2]
  1 kHz 
1000.00 Hz 
1000.00 Hz 
AC-Couple
 
AC-Couple
Sel
Rtn
Sin 
Sin 
Sin
3
3
2