Browse Definitions :
Definition

decibels relative to reference level (dBr)

The expression dBr is used to define signal strength at RF and AF frequencies. The symbol is an abbreviation for "decibels relative to reference level."

The dBr increment is based on the decibel , a logarithm ic measure of relative signal strength. Suppose a reference signal has a power of P watts, and the signal being measured has a power of P watts. Then the relative signal strength in dBr, symbolized S dBr , is:

S dBr = 10 log 10 P / P

Signal strength in dBr can also be calculated in terms of the effective signal voltage if the impedance remains constant. Suppose a reference signal has a root-mean-square ( rms ) voltage of V volts and the signal being measured has an rms voltage of V volts at the same impedance. Then the relative signal strength in dBr is:

S dBr = 20 log 10 V / V

If the dBr figure is positive, then the measured signal is stronger than the reference signal. If the dBr figure is negative, then the measured signal is weaker than the reference signal.

This was last updated in March 2011
Networking
  • remote infrastructure management

    Remote infrastructure management, or RIM, is a comprehensive approach to handling and overseeing an organization's IT ...

  • port address translation (PAT)

    Port address translation (PAT) is a type of network address translation (NAT) that maps a network's private internal IPv4 ...

  • network fabric

    'Network fabric' is a general term used to describe underlying data network infrastructure as a whole.

Security
CIO
  • digital innovation

    Digital innovation is the adoption of modern digital technologies by a business.

  • business goals

    A business goal is an endpoint, accomplishment or target an organization wants to achieve in the short term or long term.

  • vertical SaaS (software as a service)

    Vertical SaaS describes a type of software as a service solution created for a specific industry, such as retail, financial ...

HRSoftware
  • employee onboarding and offboarding

    Employee onboarding involves all the steps needed to get a new employee successfully deployed and productive, while offboarding ...

  • skill-based learning

    Skill-based learning develops students through hands-on practice and real-world application.

  • gamification

    Gamification is a strategy that integrates entertaining and immersive gaming elements into nongame contexts to enhance engagement...

Customer Experience
  • Microsoft Dynamics 365

    Dynamics 365 is a cloud-based portfolio of business applications from Microsoft that are designed to help organizations improve ...

  • Salesforce Commerce Cloud

    Salesforce Commerce Cloud is a cloud-based suite of products that enable e-commerce businesses to set up e-commerce sites, drive ...

  • Salesforce DX

    Salesforce DX, or SFDX, is a set of software development tools that lets developers build, test and ship many kinds of ...

Close