HP 8657D Pi/4 DQPSK Signal Generator for NADC & PDC

Product Summary

The HP 8657D signal generator adds Pi/4 DQPSK digital modulation capability to conventional AM, FM, and pulse modulation formats. The HP 8657D builds on the excellent performance of the HP 8657 signal generator by adding digital modulation capability. The HP 8657D provides the performance to test mobiles for North American Digital Cellular (NADC) and Japanese Digital Cellular (PDC) radio systems.

Product Features

• 100 kHz to 1030 MHz analog range

• Standard AM and FM modulation

• Pi/4 DQPSK modulation for NADC and PDC

• Pulse modulation

• <3.2% error vector magnitude

• Digital frequency bands for NADC and PDC

Product Specifications

Analog Modulation Mode:
In the analog modulation mode, specifications are the same as the HP 8657B up to 1030 MHz.
Please refer to the HP 8657B specifications for complete analog mode performance.

Pi/4 DQPSK Modulation Mode:
Frequency Range:
	10 MHz to 129.9 MHz 
	801 MHz to 965 MHz
	1420 to 1540 MHz, data inverted
Output Level Range:
	-143.5 dBm to +7 dBm in all ranges
Switching Speed:
	< 50 ms within 100 Hz of final frequency
Modulation:
	Pi/4 DQPSK
Modulation dataclock frequency range:
	Symbol clock:
		20 kHz to 25 kHz
	Bit clock:
		40 kHz to 50 kHz
Pre-modulation filter:square-root raised cosine
Filter shape factor:
	rho = 0.35 or rho = 0.50
Error vector magnitude(15 degrees to 35 degrees C): 
	< 4.0%, 10 to 129.9 MHz and 1420 to 1540 MHz, < +3 dBm
	< 3.0%, 801 to 965 MHz, < +7 dBm
I/Q origin offset(15 degrees to 35 degrees C): -35 dB, RF output only

Product Ordering Information

HP 8657D	Pi/4 DQPSK Signal Generator for NADC & PDC
   Opt 001	High-Stability Reference
   Opt 907	Front Handle Kit
   Opt 910	Total of Two Sets of Operating/Calibration (08657-90107)
		and Two Service Manuals (08657-90131)
   Opt 913	Rack Mount Flange Kit (5062-4073)
   Opt 915	Add Service Manual (does not come standard) (08657-90131)
   Opt W30	Three-Year Repair Service
   Opt W32	Three-Year Calibration Service

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Page Updated: Thursday June 19 16:17:00 UTC 1997