HP 8648A Synthesized Signal Generator, 100 kHz to 1000 MHz

The HP 8648A Synthesized RF Signal Generator is ideal for manufacturing high-volume products such as cordless telephones, pagers and two-way radios. Designed for semi-automated receiver test, and a variety of general purpose applications, the HP 8648A starts with the basic capabilities of the HP 8647A, then enhances residual FM, level accuracy and phase noise performance. While maintaining affordability, the HP 8648A is built to stringent quality standards, and offers an all-electronic attenuator to promote measurement consistency and repeatability. In addition, the simplistic design of the front panel shortens the operator's learning curve and increases productivity. With 300 storage registers and ten user-definable sequences (accessible from a remote keypad), the HP 8648A easily adapts to any test procedure.

[ Features ]

Economical synthesized signal generator
Electronic attenuator
Superior level accuracy
Wide frequency and power coverage
Remote and memory interfaces for semi-automated testing
Simple, dependable operation

[ Specifications ]

Frequency Specifications

Range:				100 kHz to 1000 MHz
Resolution:			1 Hz
  Display:		        10 Hz
Switching Speed (typical):	<75 ms
Accuracy (within one year calibration, typical):
   Standard			ą3 x (10 to the -6 power) x carrier frequency in Hz
   Option 1E5			ą1.5 x (10 to the -6 power) x carrier frequency in Hz 

Internal Reference Oscillator
Accuracy and Stability 
(Calibration and adjustment dependent; after one hour warm-up 
 and within one year of calibration):
				ą aging rate ą temperature effects ą 
				line voltage effects

				Standard timebase	Opt 1E5
	Aging			<ą2 ppm/yr		<ą0.5 ppm/yr;
							<ą1 ppm (1st yr)
	Temperature		<ą1 ppm			<ą0.05 ppm 
	Line voltage (+5%)				<ą0.1 ppm
Output: 			10 MHz, typically >0.5 Vrms into 50 ohm
External Reference Oscillator Input: 
				Accepts 2, 5, 10 MHz ą5 ppm, and a level 
				range of 0.5 V to 2 Vrms into 50 ohm


Spectral Purity Specifications

Harmonics (output <=4dBm): 	<-30 dBc
Subharmonics (output <=+4 dBm):	-60 dBc
Nonharmonics (>=5 kHz offset, <=+4 dBm output level)
   <249 MHz: 			<-55 dBc
   ą1000 MHz: 			<-60 dBc
Residual FM (CCITT, rms)
   <249 MHz: 			<7 Hz, typically <4 Hz
   <501 MHz: 			<4 Hz, typically <2 Hz
   ą1000 MHz: 			<7 Hz, typically <4 Hz
SSB phase noise (at 20 kHz offset, typical):
    @ fc 500 MHz:  		<-120 dBc/Hz;
    @ fc 1000 MHz: 		<-116 dBc/Hz;


Amplitude Specifications

Range:				+10 to -136 dBm
Resolution: 			0.1 dB
Accuracy (specified power <13 dBm to -127 dBm at 25 ą5C):
				ą1.0dB
Reverse power protection (watts into 50 ohm):	
				50 Watts

SWR: (output <-6 dBm, typical)
    <249 kHz: 			<2.5:1
    <=1000 MHz: 		<1.5:1

Output Impedance: 		Nominally 50 ohm	


Frequency Modulation Specifications

Peak Deviation (rates >25 Hz acFM)
<249 MHz: 				0 to 100 kHz
    <501 MHz: 				0 to 50 kHz
    <1000 MHz: 				0 to 100 kHz
Resolution
    For <=10% peak deviation:		10 Hz
    For >10% to maximum peak deviation:	100 Hz
Deviation Accuracy (internal 1 kHz rate): 
					ą3% of deviation ą30 Hz

Rates
Internal: 			400 Hz to 1 kHz
External dc: 			DC  to 150 kHz (typical, 3 dB BW)
External ac: 			20 Hz  to 150 kHz (typical, 3 dB BW)

Distortion (1 kHz rate, THD + N, 0.3 to 3 kHz BW):
				<1% at deviations >4 kHz

Carrier Frequency Accuracy (relative to CW in dcFM, at 25 ą5°C)
    				ą500 (typical 200) Hz, deviations <10 kHz


Phase Modulation Specifications

Peak Deviation
    <249 MHz: 			0 to 10 radians
    <501 MHz: 			0 to  5 radians
    <1000 MHz: 			0 to 10 radians

Resolution:			0.01 radian

Deviation Accuracy (internal 1 kHz rate, typical):
     				ą3% of deviation ą0.05 radians

Rates
    Internal:			400 Hz or1 kHz
    External: 			20 Hz to 10 kHz (typical, 3 dB BW)

Distortion (1 kHz rate):
				<1% at deviations >=3 radians
	

Amplitude Modulation Specifications
(AM is not specified below 1.5 MHz and is typical above 1001 MHz)

Range: 				0 to 100%; output <= +4 dBm
Resolution: 			0.1%
Accuracy (1 kHz rate): 	ą5% of setting ą1.5%
Rates
    Internal: 			400 Hz or 1 kHz
    External: 			dc: dc to 2 kHz (typical, 3 dB BW)
                                ac: 1 Hz to 25 kHz (typical, 3 dB BW)
Distortion (1 kHz rate, THD + N, 0.3 to 3 kHz BW)
    @ 30% AM: 			<2%
    @ 70% AM: 			<3%


General Specifications
Modulation Source
Internal: 			400 Hz or 1 kHz, front panel BNC connector 
				provided at nominally 1 V (p-p) into 600 ohm
External: 			1 V peak into 600 Ohms (nominal) required 
				for full scale modulation. (High/Low indicator 
				provided for external signals <=10 kHz)

Remote Programming
Interface: 			HP-IB (IEEE-488.2-1987) with Listen and Talk
Control Languages: 		SCPI version 1992.0. The HP 8648A is code 
				compatible with the HP 8656B and 8657.
IEEE-488: 			SH1, AH1, T6, TE0, L4, LE0, SR1, RL1, PP0, 
				DC1, DT0, C0, E2
ISO Compliant:
The HP 8648A signal generators are manufactured in an ISO 9002 registered 
facility in concurrence with Hewlett-Packard's commitment to quality.

Power Requirements: 		90 to 264 V, 48 to 440 Hz; 150 VA max
Operating Temperature: 		0 to 50°C
Leakage: 			Conducted and radiated interference meets 
				MIL-STD 461B RE02 and FTZ 1046. Typically <1uV.

Declarations of Conformity

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European Regulatory Declarations of Conformity.