Series LB363/GLB363 LoopBack Relay Up to 12Gbps LoopBack Relay LB363 Series GLB363 Series SERIES RELAY TYPE DESIGNATION LB363 LoopBack Relay, Sensitive Coil GLB363 LoopBack Relay, Ground Shield, Surface-Mount (Stub Leads), Sensitive Coil DESCRIPTION receiver of the DUT. The double pole design of the LoopBack The LoopBack Series relay combines two DPDT relay is perfectly suited for diff erential signaling, allowing electromechanical relays in one package that includes an relay component to provide transmit and receive signals and internal bypass path for Automated Test Equipment (ATE) their inversions to the DUT or through the bypass path. applications. The LoopBack combines the technology of two Teledyne RF/GRF300 Series relays which eliminates the need The internal structure of the LoopBack relay reduces the for external PCB traces in loop back test applications. This number of discontinuities and shortens the signal path innovation results in superior signal integrity and RF during loop back testing, providing lower insertion loss and performance, while taking minimal board space. The higher signal integrity performance than two RF/GRF303 LB/GLB363 Series is designed for digital signaling application Series relays. In the normally closed mode (de-energized) the and provides excellent signal integrity up to 12 Gbps data LoopBack relay provides four normally closed contacts. When rates. energized, the moving contacts are connected together across the loop back structure to provide two through paths. The LoopBack relay is available with two diff erent internal The normally closed contacts have similar performance to paths: Through and AC Bypass. The Through version provides RF/GRF303 Series relays. a loop back path across high performance contact material, while the AC Bypass Model adds a coupling capacitor across In addition to the thru-hole mount, the LoopBack Series relay each loop back path. The internal in-line capacitors allow you is available in through hole surface mount stub leads with a to eliminate the footprints for external components, while ground shield. The surface mount ground shield used in the performing AC bypass functions internal to the relay. The stub lead provides improved high data rate and high capacitors used feature excellent signal integrity as well as frequency performance, as well as improved repeatability. low loss high frequency performance. Upon request, various ground pin confi gurations for through lead models are available. A typical loop-back load board application uses the Device Under Test (DUT) to test itself. In this method, the transmitter from the DUT is connected through a loop back path to the ENVIRONMENTAL AND PHYSICAL SPECIFICATIONS Storage 65C to +125C Temperature Enclosure Hermetically sealed (Ambient) Operating 55C to +85C Vibration Shock 30 gs, 10 gs to 500 Hz (General Note 1) (General Note 1) 6ms half sine Weight LB363 0.16 oz. (4.53g) max. GLB363 0.18 oz. (5.10g) max. 2012 TELEDYNE RELAYS (800) 284-7007 www.teledynerelays.com LB363/GLB363 Page 1Series LB363/GLB363 LoopBack Relay Up to 12Gbps SERIES LB363/GLB363 TYPICAL RF Characteristics (See RF Notes on next page) AC Bypass Path (thru Capacitor) - Insertion Loss AC Bypass Path (thru Capacitor) - VSWR 5.00 0.00 -0.50 4.50 -1.00 4.00 -1.50 3.50 -2.00 -2.50 3.00 -3.00 2.50 -3.50 2.00 -4.00 1.50 -4.50 -5.00 1.00 0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 Frequency (GHz) Frequency (GHz) AC Bypass Path (thru Capacitor) - Isolation 0.00 -10.00 -20.00 -30.00 -40.00 -50.00 -60.00 0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 Frequency (GHz) Normally Closed RF Performance Isolation Across Contacts (RF Note 4) Isolation Pole to Pole (RF Note 5) 0 0 -10 -10 -20 -20 -30 -30 -40 -40 -50 -50 -60 -60 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 Frequency (MHz) Frequency (MHz) Insertion Loss (RF Note 6) VSWR (RF Note 6) 0 2.0 -0.2 1.8 -0.4 1.6 -0.6 1.4 -0.8 1.2 -1 1.0 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 Frequency (MHz) Frequency (MHz) LB363/GLB363 Page 2 SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE 2012 TELEDYNE RELAYS Insertion Loss (dB) Insertion Loss (dB) Isolation (dB) Isolation (dB) VSWR Isolation (dB) VSWR