User Manual

Table Of Contents
Document name:
OMU Commands and Attributes 1.0.0 v1.0
Version:
1.0
Example:
GET RSP
Reply:
0 000- 000- 000- 000000 000000 00000- ------ 000000000 000000 000- 000-
000 0 0000000 000000 000000 1 000000 000- 0000
which indicates that all alarm statuses are OK, except temperature, which is in error.
6.15 RXO – Status of Received Optical Level
This attribute replies with the status of the Received Optical Level alarm sources.
6.15.1 Usage
Attribute type: Read only
The Fiber Optic Master constantly monitors received optical level. A too low optical
input level might indicate that there is something wrong with the transmitter, a bad
optical connection (poor soldering or cleaning) or a broken fiber.
A drop in received optical level most likely means that received RF-signal level also has
dropped and that repeater coverage area is affected / decreased.
This attribute replies with the status of the Received Optical Level alarm sources for all
opto masters.
Format:
<RXO1:1>..<RXO1:6><RXO2:1>..<RXO4:6>
0 if status is OK.
1 if status is ERROR.
- (dash) if measured data is not available (communications error or improperly
configured system).
Example:
GET RXO
Reply:
00001-0000--000---------
indicating that received optical level in module in rack 1, slot 5 is lower than expected
level, and that reason for the dropped input signal level should be investigated.
6.16 SZP – Status of Pilot Tone Generator Synthesizer
Replies with the status of the Pilot Tone Generator Synthesizer alarm sources.
6.16.1 Usage
Attribute type: Read only
When commissioning an Axell Wireless Repeater System it is essential that all fiber
optic links are optimized and RF-limits adjusted accordingly. To accomplish this, a pilot
tone is transmitted from Optical Master Units to the Fiber Optic Slaves and on request
from slaves to masters. By transmitting with a known level and measuring received pilot
tone level it is possible to calculate the path loss and hence compensate system gain
accordingly.
To generate the correct pilot tone frequency, a synthesizer is used. If there is a failure
generating the correct pilot tone frequency, an Synthesizer Pilot Tone generator alarm is
triggered.
This attribute replies with the status of the Pilot Tone Generator Synthesizers.
Format:
<SZP1:1>..<SZP1:6><SZP2:1>..<SZP4:6>
where reply is
0 if status is OK/Synthesizer locked onto desired frequency.
1 if status is ERROR/Synthesizer not locked onto desired frequency.
- (dash) if measured data is not available (communications error or improperly
configured system).
19(45)