HP 355D Manual Step Attenuator, DC to 1000 MHz, 0 to 120 dB, 10 dB steps

The HP 355D dc to 1000 MHz manual step attenuator provides precision step attenuation in 10 dB steps from 0 to 120 dB. Attenuator sections are inserted and removed by cam-actuated microswitches which keep lead lengths short. This design minimizes stray capacitances and inductances, and keeps phase shift to a minimum. The HP 355D is a compact and rugged unit in which the component parts are rigidly positioned and well-shielded so that neither stray pickup nor signal leakage is a problem. It may be connected with the 355C in series to provide precision attenuation in 1 dB steps from 0 to 132 dB. Either terminal may be connected as input or output.

[ Features ]

Low insertion loss and low SWR
Negligible leakage
0 to 120 dB in 10 dB steps
Standard BNC RF connectors

[ Specifications ]

Frequency Range:	     dc to 1000 MHz

Attenuation:                 120 dB in 10 dB steps

Overall Accuracy
At 1000 Hz:                  ±0.3 dB to 120 dB 
Below 500 MHz:               ±1.5 dB to 90 dB               
Below 1000 MHz:              ±0.35 dB               

Impedance:                   50 ohms, nominal

Power Handling Capability:   0.5 Watt, average
                             350 watts, peak

Maximum SWR (input and output)	
1.2 to 0.25 GHz
1.3 to 0.5 GHz
1.5 to 1.0 GHz

Maximum Insertion Loss (0 dB setting)		
                             0.20 dB + 2.30 dB/GHz

Minimum Life:                0.5 million cycles per section

Dimensions:                  152 mm W x 71 mm H x 692 mm D
                             6 in x 2 13/16 in x 2 11/16 in

Weight                          
Net:                         0.7 kg, 1.5 lb
Shipping:                    1.4 kg, 3lb

[ Ordering ]

HP 355D Manual Step Attenuator, DC to 1000 MHz, 0 to 120 dB, 10 dB steps Opt 001 Type-N (f) connectors Opt 003 Panel mounting capability Opt 005 TNC (f) connectors

HP 355C/D VHF Attenuators dc to 1 GHz, Technical Specifications

If you do not have the Adobe Acrobat Reader necessary for viewing this documentation, download your Free Acrobat Reader now.

[ Assistance ]

To help you make the right instrument choices

Local Sales Office

[ Related ]

Related HP 355 DC - 1 GHz Attenuator Family product datasheets:

HP 355C Manual Step Attenuator, DC to 1000 MHz, 0 to 12 dB, 1 dB steps

HP 355D Manual Step Attenuator, DC to 1000 MHz, 0 to 120 dB, 10 dB steps

HP 355E Programmable Step Attenuator, DC to 1 GHz, 0 to 12 dB, 1 dB steps

HP 355F Programmable Step Attenuator, DC to 1 GHz, 0 to 120 dB, 10 dB steps

Related product families available online:

Coaxial Step Attenuators