HP 83751A - Page 122

I
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Modulation Keys
PERIOD
PLUSE ,$
I 1
MODE 0
WIDTH
UNLOCKED FM
0
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Figure 10-l. The Modulation Group
AM and FM modulation is obtained by means of an external signal being
applied to the rear-panel AM INPUT or FM INPUT BNC connectors. There are
2 FM modes: AC (locked) and DC (unlocked).
NOTE
In the DC (unlocked\ mode, frequency accuracy will he degraded as a result of the synthesizer being
bypassed.
10-2