HP 11960A EMC Preselector

Performing conducted emissions measurements on today’s products usually involves testing switching-mode power supplies. Even though switchers are light weight and economical to use, they do produce broadband noise which can couple on to power lines. This broadband noise can cause overloading of the receiver’s or analyzer’s first mixer producing measurement errors.

With the use of a preselector, the bandwidth of the energy presented to the first mixer is reduced, thereby reducing mixer overload and measurement errors.

The HP 11960A EMC preselector is a series of switched band pass filters designed to reduce the bandwidth of the energy present at the first mixer of the EMC analyzer.

[ Features ]

Reduces RF overloading and its effects
Improves radiated emissions measurement sensitivity

[ Specifications ]

Input/Output Impedance:        50 ohms (VSWR <2:1 Type-N connector) 

Maximum Input Signal:          30 dBm low band, 20 dBm high band
 
Maximum Input/Output DC Voltage:  50 Vdc

Passband Flatness:             ±1 dB 

Stopband Rejection:            >40 dB 

Input Attenuator (switched):   10 dB 

LF Filter Bands (nominal loss 4 dB) 
   0.15 MHz to 0.4 MHz 
   0.4 MHz to 1.0 MHz 
   1.0 MHz to 2.0 MHz 
   2.0 MHz to 4.0 MHz 
   4.0 MHz to 7.0 MHz 
   7.0 MHz to 10.0 MHz 
   10.0 MHz to 15.0 MHz 
   15.0 MHz to 30.0 MHz

LF Through Path
Frequency Range:               9 kHz to 30 MHz 
Loss:                          4 dB nominal

HF Path (amplified) 
Frequency Range:               30 MHz to 1000 MHz 
Gain:                          30 dB nominal 
Noise Figure:                  8.0 dB nominal 
Attenuator (switched):         10 dB

Power Requirements           
115V/230V AC (50/60 Hz):       25 W

[ Ordering ]

HP 11960A EMC Preselector

HP 11960A EMC Preselector, Product Overview

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

[ Assistance ]

To help you make the right instrument choices

Local Sales Office

[ Related ]

Related product families available online:

EMI Precompliance Analyzers