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BPSK (Binary Phase Shift Keying)

Binary, Biphase, or Bipolar Phase Shift Keying (BPSK) is a means to rapidly select between two pre-programmed phases. The PMG-130 incorporates two separate 14 bit behavior registers to control the output phases identically effect both the I & Q outputs. The logic state of the MODIN pin controls the selection of the Phase Set A (PS-A IBR-00-01) and Phase B (PS-B IBR-02-03) registers.  When MODIN=low, PS-A is selected and when MODIN=1, PS-B is selected. The basic programming steps to incorporate BSPK are:

1. Program the carrier frequency into FS-A.
2. Program the desired 14 bit Phase shift in to PS-A and PS-B
3. Attach BPSK data source to MODIN pin
4. Activate an I/O Update sequence, either internally or externally.

Note: If higher order PSK modulation is desired, the user should select the single tone mode and program PS-A using the 512K byte SRAM and the associate control pins on the Remote Control connector. Figure 2.10.0 below shows a typical operation of the BPSK mode.

Figure 2.10.0 BPSK (Bipolar Phase Shift Keying) Timing Diagram

MULTIPLE FREQUENCY +  MULTIPLE PHASE + QUADRATURE AMPLITUDE MODULATION