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LBVM900 Series 1 GHz Indoor High Output Optical Node

Installation & Operation Manual

2-2035 Fisher Dr, Peterborough, ON K9J 6X6  Canada   

+1.705.742.1350  

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 1.800.465.7046  

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 [email protected]  

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 lindsaybb.com

© 2021 Lindsay Broadband Inc. All rights reserved. Printed in Canada. Non-Lindsay Broadband product marks,  

service marks, and company names in this document are the property of their respective owners.

All information is subject to change without notice.

Rev. 07/21 (LBB0376)  

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 Page 4 of 4

TROUBLESHOOTING GUIDELINES

1. 

No Power on the LBVM900 ONU.

a. 

Check the powering coaxial cable and connections for intermittent connections.

b. 

Check the output of the power adaptor for proper DC voltage (+29 VDC). 

c. 

Check with a different 29 VDC power pack.

d. 

Try powering via the RF OUT/PWR IN port using a power inserter.

2. 

Low or no downstream RF output level.

a. 

Verify the optical receive level on the LBVM900 is within range (-6 dBm to +2 dBm, 3.5% OMI level and correct downstream wavelength).

b. 

Using a fiber inspection scope, check the optical connector and adaptor. Make sure the optical connection is clean.

c. 

If the optical input is within range, the OPT ON LED on the photo diode is illuminated. Verify that the OPT ON LED is illuminated. Use a DC voltage meter to 

measure the 1 mW/1V OP TP on the photo diode of the ONU. Refer to step #13 and table under the OPTICAL, RF & POWER CONNECTIONS section of 

this manual.

d.

  Verify steps 2 to 8 under the FORWARD & REVERSE SETUP GUIDELINES of this manual for more troubleshooting.

e. 

Check for intermittent connections or pinched fibers.

3. 

Low or no upstream transmit level.

a. 

Verify the LASER ON LED on the LBVM900 ONU is illuminated. Measure the OP TP 1V/1 mW DC TP on the laser diode using a digital multimeter on DC 

voltage setting. Verify the DC voltage reading is as expected from table under the OPTICAL, RF & POWER CONNECTIONS section of this manual.

b.

  Connect an optical power meter to the OPT OUT port. Using the optical power meter at proper upstream wavelength, verify the optical output of the 

LBVM900 directly from OPT OUT port is ≥ 2.7 dBm.

c.

  Verify the upstream RF input is within the LBVM900 upstream frequency range (5-42 MHz or 5-85 MHz) and level. Refer to reverse setup guidelines. 

d.

  Use a CW carrier for injection to troubleshoot. 

e.

  Inject either from the RF OUT port or using the bi-directional -20 dB forward TP. Make sure to compensate 20 dB if using the -20 dB TP to inject carrier. 

f.

  The RF input can also be verified at the reverse -20 dB TP.

g. 

Check for intermittent connections.

4. 

If the problem is still not solved, replace, and try with another node.

5. 

If the problem still exists, contact Lindsay Broadband for support. Do not open the LBVM900 as it will void the warranty.

ORDERING INFORMATION

# of Fibers

Laser

TX

TX

Sub-Split

Optical

Power

Type

Power

Wavelength

Connector

Adaptor

LBVM900

x

D

x

xx

xx

xx

x

S = Single (WDM)

D = DFB

2 = 2 mW

31 = 1310 nm

45 = 42/54

SA = SC/APC

0 = None

D = Dual (RX & TX fibers)

3 = 3 mW

47 = 1470 nm

68 = 65/85

SU = SC/UPC

1 = N. America

49 = 1490 nm

81 = 85/102

2 = Europe

51 = 1510 nm
53 = 1530 nm
55 = 1550 nm
57 = 1570 nm
59 = 1590 nm
61 = 1610 nm

COMPLETING THE INSTALLATION

1. 

Record the input and output levels for the station in both upstream and downstream for reference.

2. 

Make sure the cables are routed properly and all connections are secured.

3. 

Ensure the optical fiber cable is not pinched and does not have sharp bends.

Optional Accessories

Part #

Description

LBVM900GP-xdB

Plug-in attenuator (x = dB value; available values = 0, 2, 4, 6, 8, 10, 12, 14, 16)

LBVM900GE-xdB

Plug-in equalizer (x = dB value; available values = 3, 6, 9, 12, 15, 18)

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