HP 8644B High-Performance Synthesized Signal Generator, 252 kHz to 1030 MHz

The HP 8644B signal generator represents the highest overall performance in HP's line of 1 GHz and 2 GHz signal generators. This generator has very low SSB phase noise (-136 dBc/Hz) and spurious (-105 dBc). Instead of mechanical relays, the HP 8644B uses solid state components accurate to within 1.0 dB for setting levels. An advanced internal modulation synthesizer provides coverage to 400 kHz and two-tone capability with the selection of sine, square, triangle, sawtooth, and white Gaussian noise waveforms.

[ Features ]

-136 dBc/Hz SSB phase noise at 20 kHz offset at 1 GHz
< -105 dBc nonharmonic spurious up to 1 GHz allows spurious rejection tests to be fully automated with confidence
±1.0 dB output level accuracy down to -127 dBm
Internal modulation synthesizer with coverage up to 400 kHz and two-tone capability

[ Specifications ]

Frequency Specifications
Range:                        0.252 to 1030 MHz
     Opt 002:                 0.252 to 2060 MHz
                           
Resolution:                   0.01 Hz

Accuracy:                     Timebase stability x f_c

Switching Speed:              <350 ms, typical

Sweep
Digital Sweep:                Digitally stepped sweep over entire 
                              frequency range. Linear/log selection. 
                              0.5 to 1000 s sweeps.

Markers/Z-Axis Output:        3 markers available/Z-axis output nominally 
                              +5 V/X-axis output nominally 0 to 10 V.

Phase Continuous Sweep:       40 MHz of span available at maximum 
                              carrier frequency. 20 ms to 10 s sweep times.			

Spectral Purity Specifications
SSB Phase Noise @ 1 GHz (20 kHz offset):
                              -136 dBc/Hz

Nonharmonics (>10 kHz offset):	
                              -105 dBc, 0.252 to 1030 MHz
                              <-100 dBc, 1030 to 2060 MHz

Harmonics:                    <-25 dBc, output <=+10 dBm

Subharmonics:                 None, 0.252 to 515 MHz
                              <-52 dBc, 515 to 1030 MHz
                              <-40 dBc, 1030 to 2060 MHz

Residual FM @ 1 GHz: 0.3 to 3 kHz post det. BW: 
                              <1 Hz rms
				

Output Specifications
Range:                        +16 to -137 dBm
                              +13 dBm (Opt 002, 005)

Resolution:                   0.1 dB

Absolute Accuracy:            ±1 dB, output >=-127 dBm

Reverse Power Protection:     50 W


Modulation Specifications
Amplitude Modulation 
Depth (@: <=+7 dBm):          0 to 100%

Resolution:                   0.1%

Bandwidth (3 dB) <=+7 dBm:    dc to 100 kHz, 128 MHz <f_c <1030 mHz

Accuracy (1 kHz rate):        ±(7% of setting + 1%) up to 80% depth                               

Distortion (30% depth, 1 kHz rate):
                              <2%
     Opt 002:                 <4%

Frequency Modulation 
Maximum Peak Deviation:       20 MHz/200 kHz¹, <1030 MHz
(Deviation halves per lower octave):	
                              10 MHz/100 kHz¹, <515 MHz

Resolution:                   2.5% of setting

Bandwidth (3 dB):             dc to 100 kHz

Carrier Accuracy in FM:       ±0.5% of setting

Indicator Accuracy:           <5%, <30 kHz rate: <10%, <100 kHz rates

Distortion:                   <5%, 20 Hz to 100 kHz rates

¹Low-noise mode


Pulse Modulation 
On/Off Ratio:                 >35 dB; >80 dB, >1030 MHz

Rise/Fall Time, 10 to 90%:    <100 ns

Repetition Rate:              dc to 1 MHz 

Internal Modulation Source 
Waveforms and Rates:          Sine; white Gaussian noise 
                              (0.1 Hz to 400 kHz); Triangle, 
                              sawtooth, square (0.1 Hz to 50 kHz)		

Frequency Accuracy:           Same as timebase

Output Level (into 600 ohms): 2 V pk

Output Resolutions:           2 mV pk					

¹Low-noise mode

Remote Programming Specifications
Interface:                    HP-IB (IEEE 488.2-1987)

Control Language:             HP-SL; all functions controlled except 
                              power

IEEE-488 Functions:           SH1, AH1, T6, TE0, L4, LE0, SR1, RL1, 
                              PP0, DC1, DT0, C0, E2


General Specifications
Power Requirements:           ±10% of 100 V, 120 V, 220 V, or 240 V; 
                              48 to 440 Hz; 400 VA

Operational Temperature:      0 °C to 55 °C

Leakage:                      Conducted and radiated interference 
                              meets MIL-STD-461B REQ2 and FTZ 1046

Calibration Interval:         Recommended 3 years (MTBC)

Weight:                       30 kg

Size:                         177 mm H x 426 mm W x 624 mm D
                              (7 in x 16.8 in x 24.6 in) 
                              Option 010 adds 35 mm (1.4 in) to D

Declarations of Conformity

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European Regulatory Declarations of Conformity.

[ Ordering ]

HP 8644B High-Performance Synthesized Signal Generator, 252 kHz to 1030 MHz Opt 001 High-Stability Timebase Opt 002 2-GHz Doubled Output Opt 003 Rear-Panel Input/Output Opt 005 Electronic Attenuator¹ Opt 009 Specified VOR/ILS¹ Opt 010 Reduced-Leakage Configuration Opt 011 2-GHz Internal Frequency Counter Opt 907 Front-Handle Kit Opt 908 Rack Flange Kit Opt W30 Add 3 Years to Return Warranty Service Kit HP 08645-61116 ¹Not compatible with Option 002

[ Key Literature ]