The 8657D Pi/4 DQPSK Signal Generator adds Pi/4 DQPSK digital modulation capability to conventional AM, FM, and pulse modulation formats. It builds on the excellent performance of the 8657B synthesized signal generator, adding the digital modulation capability needed to test the most recent cellular radios for the North American Digital Cellular (NADC) and the Japanese Digital Cellular (JDC) radio systems. The unit covers three frequency ranges: 10 to 129.9MHz, 810 to 965MHz and 1420 to 1540MHz.
