HP 8494 Programmable and Manual Step Attenuator Family

Product Summary

Hewlett-Packard step attenuators offer exceptional repeatability and reliability in a wide range of attenuation, frequency, and connector options. Each attenuator contains three or four cascaded attenuator sections; edge-line contacts insert and remove attenuator sections as needed. Precision gold-plated leaf springs ensure long life and very high attenuator repeatability. Programmable models feature fast-switching solenoids and attenuation programming is done through a 12-pin connector.

To improve measurement accuracy in manual and automated test systems, NIST traceable data (SWR and attenuation) is available as Option 890. Generated on an HP 8510 network analyzer, this option offers swept data for each attenuator in 250 MHz steps from 1500 MHz to 18 GHz, depending on the model.

Related product datasheets available online:

HP 8494A DC to 4 GHz Manual Step Attenuator
HP 8494B DC to 18 GHz Manual Step Attenuator
HP 8494G DC to 4 GHz Programmable Step Attenuator
HP 8494H DC to 18 GHz Programmable Step Attenuator

Product Features

• High reliability

• DC to 4 GHz and dc to 18 GHz models

• Long life and exceptional repeatability

• Automatic dc current interrupts simplify programmable model drive circuit design

Product Specifications

Product Specifications
Frequency Range
HP 8494A/G:			dc to 4 GHz
HP 8494B/H:			dc to 18 GHz

Incremental Attenuation:	0 to 11 dB
				1 dB steps

SWR Maximum (50 ohms nominal)
HP 8494A/G:			1.5
HP 8494B/H
	dc to 8 GHz:		1.5
	dc to 12.4 GHz:		1.6
	dc to 18 GHz:		1.9

Insertion Loss (0 dB Setting):	0.6 dB + 0.09 dB/GHz

Attenuation Accuracy
HP 8494A/G
	1 to 2 dB:		±0.2 dB
	3 to 6 dB:		±0.3 dB
	7 to 10 dB:		±0.4 dB
	11 dB:			±0.5 dB
HP 8494B/H
  dc to 12.4 GHz
	1 to 2 dB:		±0.3 dB
	3 to 4 dB:		±0.4 dB
	5 to 6 dB:		±0.5 dB
	7 to 10 dB:		±0.6 dB
	11 dB:			±0.7 dB
  dc to 18 GHz
	1 to 5 dB:		±0.7 dB
	6 to 9 dB:		±0.8 dB
	10 to 11 dB:		±0.9 dB

Power Rating
Average:			1 W
Peak:				100 W
Speed:				10 µs maximum

Minimum Life:			5 million cycles per section

Solenoid (HP 8494G/H only)
Voltage:			20 to 30 V
Speed:				<20 ms
Power:				2.7 W

Size
HP 8494A/B:			73 mm W x 43mm H x 159 mm D
				(2.9 in x 1.7 in x 6.2 in)
HP 8494 G/H:			73 mm W x 43 mm H x 142 mm D
				(2.9 in x 1.7 in x 5.6 in)

Weight:				0.9 kg (2 lb)

Product Ordering Information

HP 8494A	Manual Step Attenuator, 0 to 11 dB, 1 dB steps
HP 8494B	Manual Step Attenuator, 0 to 11 dB, 1 dB steps
HP 8494G	Programmable Step Attenuator, 0 to 11 dB, 1 dB steps
HP 8494H	Programmable Step Attenuator, 0 to 11 dB, 1 dB steps

 

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Page Updated: Thursday June 19 16:10:24 UTC 1997