Fiber-Span Fiber Optic RF Repeater System FS31 Series User Manual Page 1 of 13 Rev 01 5-DEC-06 Fiber Optic RF Repeater System
Fiber-Span ..........................................................................................................................1 Fiber Optic RF Repeater System ......................................................................................1 FS31 Series User Manual ....................................................................................................1 1 Introduction ...................................................................................................................
Product Overview Fiber-Span provides product to enable RF signal to be distributed via optical fiber cable. RF signal sources can be used from over the air (OTA) from a Radio Base Station (BS), OTA from handheld devices, or directly from a BS radio. RF signals are converted to modulated light for transport through optical fiber media to remote locations.
RRU RRU RRU RRU Optical Fiber BTS BSU FTU Figure 3. Local Base Station System 4 Product Diagrams RRU Block Diagram Door Switch FC/APC [Opt Out] FC/APC [Opt In] PA H H C LN A N-F [RF] L L A LN C Fiber Transceiver PA [Alarm] Control Board Power Supply +28V Power Supply +12V Line Cord Figure 4.
[Laser Alarm] [Receiver 1 Alarm] [Receiver 2 Alarm] [Power] [Receiver 3 Alarm] [Receiver 4 Alarm] FTU Block Diagram Optical 4-Way 4-Way RF Combiner Fiber Optic Receiver Fiber Optic Receiver Fiber Optic Receiver Power Supply Fiber Optic Transceiver [RF Out] N-RF Optical Out (4) FC/APC [Summary Alarms] Optional [Opt Out 4] [Opt Out 3] [Opt Out 2] [Opt Out 1] [Gain 1] [Opt In Alm 1] [Gain 2] [Opt In Alm 2] [Gain 3] [Opt In Alm 3] [Gain 4] [Opt In Alm 4] [Laser Alm 1] Optical In (4) FC/APC
5 RF Path Definitions The RF paths are defined as follows: Downlink – Originates at the FTU or and IHU, over fiber to the RRU to the RF Port. The Downlink generally is defined by the RF output power the RRU can deliver. Uplink – Originates at the RRU, over the fiber to the FTU or IHU to the RF Out Port. The Uplink is generally defined by RF input sensitivity. 6 6.1 Installation Guide General All unused RF Terminals must be terminated with a 50 Ohm load.
Alarms The Opt in Alarm interface uses a wire contact header (supplied) that will plug into the Opt in Alarm sockets. Connection of alarm wires to the wire contact header requires a small standard flathead screwdriver. The connections are dry contact relay terminals. The alarm LED’s on the front panel indicate alarm conditions for each individual uplink optical receiver and downlink optical transmitter. An optional Summary alarm is available. A receiver alarm is triggered by excessive optical loss.
range. Make all RF connections and terminate all unused RF connections before applying AC Power. Figure 8. RRU/IHU (Wall Mount Version) Bottom Side Figure 9. RRU/IHU (Rack Mount Version) Alarms The alarm interface uses a circular connector. The connections are dry contact relay terminals.
See LED alarm indicator locations in Figure 10. A receiver alarm is triggered by excessive optical loss. The transmitter alarm is triggered when the laser transmitter runs over bias. The PA alarm indicates that the PA is overdriven. The Door / Fan alarm indicates when the door is left open or if a cooling fan fails. The alarm output is summarized which makes one set of contacts available on the circular alarm connector. Normal operation leaves the contacts normally open (NO).
Lower Both Uplink and Downlink Maximum Composite RF into LNA (No Damage) +10 dBm, input P1 = -6 dBm, LNA gain is 27 dB External in-line attenuator Pad C NFemale to NMale Table 1. Attenuator Configurations IHU RF Levels The IHU downlink has a high gain to boost weak received signals to levels to drive the optical components. Do not allow a composite RF level greater than 0 dBm into the optical transceiver. See the IHU rear RF INPUT MAX information.
Attenuator B Attenuator A LED Alarm Indicators Figure 11. RRU Attenuator Locations Pad A and Pad B (SMA-Female to SMA-Male) Attenuator C Figure 12.
6.3.1 Recommended System Start up Procedure 6.4 7 • Verify all RF cables are connected and all unused RF connections terminated with 50 Ohm terminations. • Verify all Alarm and AC connections are properly made • Connect fiber optic cables. • Apply AC power to system components. Caution RRU has internal AC power connections that can cause shock if operator is not careful. Always verify the AC Power area is clear of all objects.
9 Reference Documents Example Document Title Example Document Description FS31FS-04-LM-OUT 4-Way FTU Transceiver FS31RS-90-C-06-WM-OUT RRU Transceiver, SMR-900, 5W FS31X-1.
Dwg. No. FS31FS-04-LM-OUT Rev:1 Fiber-Span 111 Corporate Blvd. S. Plainfield, NJ 07080 www.fiber-span.com FIBER-SPAN RF ON FIBER ® Technology Units: [millimeters] inches FS31FS-04-LM, Fiber Transceiver Unit, 4-Way with Local Alarms, 1U Rackmount Outline Drawing DC Power Green LED On: OK Off: Fault Optical Laser Alarm Red LED On: Fault Off: OK 457.2 18.00 Optical Receiver Alarm 1-4 Red LED On: Fault Off: OK 481.5 19.0 31.8 1.25 43.7 1.72 464.9 18.30 425.2 16.
Dwg. No. FS31RS-90-C-06-WM-OUT Rev:1 FIBER-SPAN RF ON FIBER ® Technology Fiber-Span 111 Corporate Blvd. S. Plainfield, NJ 07080 www.fiber-span.com Units: [millimeters] inches Third Angle Projection FS31RS-90-C-06-WM, Remote Repeater Unit, Wall-Mount Enclosure Outline Drawing 406.4 16.00 7.9 p. 0.31 Ty 425.5 16.75 444.5 17.50 304.8 12.00 1/4-Turn Door Latch 393 15.47 355.6 14.
Dwg. No. FS31X-1.9-60-2-RM-OUT Rev:1 Fiber-Span 111 Corporate Blvd. S. Plainfield, NJ 07080 www.fiber-span.com FIBER-SPAN RF ON FIBER ® Technology Units: [millimeters] inches Third Angle Projection FS31X-1.9-60-2-RM, IHU, 1850-1990 MHz, 5W 4U Rackmount Outline Drawing Exhaust Fans Do Not Block Ground Lug 1/4"-20 Thread AC Power Entry IEC 320 Pinout 4 5 3 6 2 7 1 8 Note Key Location RF N-female Optical Out 1& 2 FC/APC Alarms Remote 2 Enable Switch Optical In 1& 2 FC/APC 38.1 1.
