Extron electronic FPM 101, FLS 101 manual Mandrels for Multimode Transmit Reference Cables

Mandrels for Multimode Transmit Reference Cables

When testing multimode links using an overfilled LED source, always wrap the transmit reference cable five (5) times around the proper diameter mandrel. This is specified by TIA/EIA-568-B and improves insertion loss measurement repeatability and accuracy. Do NOT use mandrels on multimode receive reference cables or singlemode reference cables.

Available mandrels for test		Diameter (D)
reference cables with 3 mm jackets		for other jacket
		diameters (in mm)
Fiber Type	Part Number
62.5 μm	Contact Extron	D = 20 mm minus
		jacket diameter
50 μm	Contact Extron	D = 25 mm minus
		jacket diameter
Kit with both	Contact Extron
mandrels

Multimode Transmit Jumper

D

(5) Wraps

Mandrel

Loops for Singlemode Transmit Reference Cables

For TIA testing of singlemode links, the transmit reference cable must have a 1.2 inch

(30 mm) loop secured by tape, hook and loop fasteners, or other means. Do not pull the fastener too tight.

Transmit

Reference Cable

1.2inch (30 mm) Diameter Loop

Secure

Loop Here

FLS 101

Fiber Optic Test Meters • Maintenance 19