Each housing is blue baked enamel per Federal Standard 595 #25109 over primer wash per DOD-P-15328. This high sensitivity allows for measuring equivalent SWR of 1:101 or better.Įach RLB-I Return Loss Bridge comes completely assembled in a premium shielded die cast aluminum alloy A380 housing. Each housing is blue baked enamel per Federal Standard 595 25109 over primer wash per DOD-P-15328. Each RLB-I Return Loss Bridge comes completely assembled in a premium shielded die cast aluminum alloy A380 housing. Most bridges have a residual return loss from 30-40 dB (1000-1 to about 10,000). This high sensitivity allows for measuring equivalent SWR of 1:101 or better. If the impedances of the internal reference to the DUT are exactly equal, than the detector output will be essential zero (0). The DUT (device under test) is connected to the item to be tested such as an antenna, network, coax, or any other device. The DET (detector) is connected to an oscilloscope or spectrum analyzer for analysis. There are models for balanced reference impedances from 100 to 150 ohm for either 50 or 75 ohm network analyzers, covering frequency ranges from 10kHz to 300MHz. The INPUT port is connected to a test frequency source such as an RF oscillator or tracking generator from a spectrum analyzer. North Hills Series RLB Return Loss Bridges interface with network analyzers to measure return loss of UTP cable and other balanced systems. ![]() ![]() Return Loss Bridges operate by comparing the unknown impedance to a reference impedance. The bridge components are precision SMD devices with a wide band 1:1 750 MHz SMD transformer using micro strip construction. ![]() The internal reference impedance is 50 ohms. The RLB-I internal reference (three ports) is a high performance ReturnLoss Bridgeoptimized for ham radio applications.
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