Giga-tronics 2508B, Operation Manual

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Modulation Operation Giga-tronics 2500B Series Microwave Signal Generators
Page 58 Operation Manual, Part Number 34737, Rev C, June 30, 2011
PM Menus
Submenu Parameter
Figure 28: PM Internal Continuous Menu
PM Int Cont Menu
(see Figure 28)
The PM Internal Continuous menu produces a continuous pulse-modulated RF output
with pulse characteristics determined by an internally-generated pulse signal (any
signal at the PULSE IN/PM TRIG IN connector is ignored).
Items in this submenu that can be modified are:
PM Turns pulse modulation on and off. Press the adjacent soft key or the Step Up or
Step Down buttons toggle the PM state. The PM indicator is displayed in the upper
right-hand corner of the display when pulse modulation is turned on.
PRI The pulse repetition interval (PRI) of the internal pulse modulating signal. PRI sets
the duration between similar edges of the modulating signal, and thus, the RF output’s
pulse repetition interval. The frequency of the pulses is the reciprocal of the PRI;
frequency = 1/PRI.
NOTE: This parameter setting is used for the internal continuous and internal gated
pulse modulation modes; it is not set and stored separately for those modes.
Width: The width of the internal pulse modulating signal. Sets the duration of the
longest state of the internal modulating signal and the RF output’s pulse width.
NOTE: This parameter setting is used for all three internal pulse modulation modes
(continuous, triggered, and gated); it is not set and stored separately for each of these
modes.
Sync Out Delay Sets the amount of delay that occurs between the leading edge of the
video pulse at the PULSE OUT connector and the leading edge of the sync pulse at the
PM SYNC OUT connector.
NOTE: This parameter setting is used for all three internal pulse modulation modes
(continuous, triggered, and gated); it is not set and stored separately for each of these
modes.