LBON820ACT Series 1.2 GHz 8-Port OBI-Free RFoG ONU (Fiber to the Tap - FTTT)
INSTALLATION MANUAL
SETUP CONT'D.
11.
For the upstream transmitter, select one out of eight wavelengths from 1603.5 to 1616.5 nm that are spaced 0.25 nm apart. The upstream transmitter laser
wavelength can be checked or changed under
C
H
parameter. You can choose from values
1
to
8
.
12.
To set up the upstream path, you can inject the upstream RF from one of the eight subscriber ports. Make sure all other RF ports are terminated. With 0 dB reverse
attenuation in the ONU, the optimum input to the subscriber port is 35 dBmV or 23 dBmV into the auxiliary port. Do not inject more than 40 dBmV RF into the ONU
subscriber ports (28 dBmV into the auxiliary port), as it may saturate the laser/gain blocks. You can also use the FWD -20 dB TP to inject the upstream carrier as
it is a bi-directional test point. But remember that the TP is -20 dB relative to auxiliary port and -8 dB relative to subscriber ports. So if using the bi-directional FWD
-20 dB TP to inject upstream RF carrier, do not inject more than 48 dBmV into the FWD TP.
13.
If the RF plan requires you to inject more level into the upstream, then you can add attenuation in upstream path as described in step #16. For eg: 5 dB attenuation
in
A
2
menu will raise your RF input value by 5 dB. Therefore, now you will achieve optimum performance with 40 dBmV RF input from subscriber ports instead of
35 dBmV with 0 dB reverse attenuation.
14.
When the upstream transmitter starts transmitting, the LASER ON LED on the ONU will illuminate
RED
.
15.
On the setup menu, the parameter
4
displays the transmitter output power in dBm. The parameter
5
displays the laser bias current in mA.
16.
The upstream transmitter can be selected to work in either Burst mode (like RFoG) or Continuous ON (traditional HFC) mode. Under menu
B
C
set the transmitter
to your preferred mode of operation.
17.
Set the reverse attenuation under the menu
A
2
if needed/required. Maximum value that can be set is 20 dB.
18.
There is a unidirectional Reverse TP that is -20 dB relative to the BOSA TX input. The level out of this test point is -20 dB relative to the level that hits the upstream
transmitter. This test point is for troubleshooting the upstream path. To ensure the laser upstream transmitter is not over driven, verify the level at this TP does not
exceed 24 dBmV. Regardless of the input port or value of reverse attenuation in the ONU, if the level exceeds 24 dBmV on this TP then the laser transmitter could
start clipping and saturate.
19.
This concludes the upstream setup for the LBON820ACT.
20.
Before closing the lid, make sure that no foreign matter, dirt, or chips or strands of the grounding mesh wire interfere with the sealing surface. Make sure the fiber is
routed properly and secured.
21.
Make sure all the RF ports and fiber entry point are secured, not getting pinched and are weatherproofed.
22.
Tighten the lid bolts gradually alternating diagonally opposite, to avoid undue stress or warp in the housing. Use a 1/2 inch wrench.
23.
The lid bolts must be tightened to the specified 40 to 120 inch-pounds (in-lb) or 4.5 to 13.6 Nm to ensure proper closing.
ORDERING INFORMATION
Optional Accessories
Part #
Description
LBON820ACT-DF-45
Diplex filter kit consists of one diplex filter module, one downstream high-pass filter module & one upstream
low-pass filter module for 42/54 MHz frequency range
LBON820ACT-DF-81
Diplex filter kit consists of one diplex filter module, one downstream high-pass filter module & one upstream
low-pass filter module for 85/102 MHz frequency range
LBON820ACT-DF-22
Diplex filter kit consists of one diplex filter module, one downstream high-pass filter module & one upstream
low-pass filter module for 204/258 MHz frequency range
2-2035 Fisher Dr, Peterborough, ON K9J 6X6 Canada
+1.705.742.1350
•
1.800.465.7046
•
•
lindsaybb.com
© 2020 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. 06/23/20 (LBB0246)
•
Page 4 of 4
Figure 2
q
p
A
2: 00
A
2
: Set reverse path attenuation (Max: 20 dB)
b
C
:
b
b
C
: Select upstream transmitter working mode;
b
Burst mode;
C
Continuous ON mode
5
25
5
: Monitor laser bias current (mA); if
o6
then working in RFoG (Burst) mode
4
3.0
4
: Monitor optical output power from transmitter (dBm); if
-99
then working in RFoG (Burst) mode
C
H
1
C
H
: Select upstream transmitter wavelength;
8
wavelengths spaced 0.25 nm
A
1
: 02
A
1
: Set forward path attenuation (Max: 20 dB)
E
1
: 00
E
1
: Set forward path equalization (Max: 20 dB)
E
54
E
: Select forward path start frequency/diplex filter;
54
for 42/54 MHz;
11
0
for 85/102 MHz &
258
for 204/258 MHz
A
G: -6
A
G
: Set optical AGC range (-8 dBm to -5 dBm)
3
12.
1
3
: M12 V voltage rail output (V)
2
8.2
2
: M8 V voltage rail output (V)
1
-
1
.2
1
: Monitor received optical input power (dBm);
Lo
if no or low optical power;
H
3.0
if high optical input power
Up & Down buttons
ENTER Set button. Press down & hold for 3 seconds to adjust any parameter
