HMC703LP4E Datasheet, PDF (26/58 Pages) Hittite Microwave Corporation – 8 GHZ FRACTIONAL SYNTHESIZER

v02.0813
HMC703LP4E
8 GHz fractional synthesizer
The HMC703LP4E sweep function cycles through a series of discrete frequency values which may be
a. Stepped by an automatic sequencer or,
b. Single stepped by individual triggers in Single Step Mode.
Triggering of each sweep, or step, may be configured to operate:
a. Via a serial port write of 1 to Reg 0Eh[0] (it should then be returned to 0)
b. Automatically generated internally
c. Triggered via TRIG pin-6
Figure 31. HMC703LP4E Sweep Function
2-Way Sweeps
The HMC703LP4E can be configured to operate in 2-Way Sweep mode by programming Reg 06h [7:5] = 6 or 7. A
2-way sweep is shown in Figure 32. The start of the sweep can be triggered by external TRIG pin-6 if EXTTRIG_EN
= 1, or the SPI_TRIG (Reg 0Eh). In automatic 2-Way sweep (Reg 06h [7:5] = 7), the ramp restarts immediately, without
waiting for an external trigger.
Figure 32. 2-Way Triggered Sweep
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