Figure 1. Model 4040A Front Panel.
19
BURST OFF/ON Switch
. Selects external or
internal burst gate. Continuous output is obtained
with switch in the OFF position and no external
burst gate is applied.
9
17.
BURST WIDTH Control
. Adjusts the duty
cycle of the internal burst gate.
18.
% MODULATION Control
. Adjusts the
percentage of AM or FM modulation.