Bird Technologies 429-83H-01 Series-Manual - Manual (Page 35)

TX RX Systems Inc. Manual 7-9439-6 09/03/09 Page 27
the front panel circuit board and the rear panel cir-
cuit board (on the MCU deck itself). Table 10 lists
the faults and system responses.
PERIODIC MAINTENANCE
The following procedures can be followed as part
of a periodic maintenance program.
1) TX RX Systems Inc. recommends that tests for
establishing the performance level of the sys-
tem, as outlined in this manual, be performed
every six months.
2) Because it is possible that the current alarms
may not detect a fault affecting RF gain, we rec-
ommend measuring system sensitivity every six
months and comparing this value against the
stored value.
3) A yearly inspection of the tower box is also rec-
ommended. The box features a hinged door,
which may be opened after loosening the lock-
ing clamps. Inspect and tighten any loose con-
nectors or other hardware. Make sure the
moisture relief openings are unobstructed and
remove any accumulated condensation. It is
important to tighten the door-clamp locking
screws uniformly after inspection so that the
door gasket seal is maintained. Tighten each
clamp about half-way, then start back at the first
clamp and fully tighten each one in the same
order. Tighten with a hand tool only.
4) All feedline connections should be inspected for
tightness and waterproofing integrity. Water
seeping into the transmission lines will cause
system degradation.
RECOMMENDED SPARE PARTS
It is recommended that one distribution amplifier
assembly be kept on hand for emergency repairs.
The par t number of the distribution amplifier
assembly is 3-21450.
OPTIONAL EQUIPMENT
Optional equipment can be purchased from TX RX
Systems Inc. in order to increase the performance
of your TTA system. These include a narrowband
filter as well as a multicoupler expansion deck. The
narrowband filter is designed to help limit the band-
width of the multicoupler unit. The multicoupler
expansion deck will increase the total multicoupler
outputs to 32.
Narrowband Filter
There are a total of nine different narrowband filters
available for use with your TTA system. There are
four filters which operate in the 792 to 806 MHz
range and five filters in the 806 to 824 MHz range.
Table 11 lists all of the optional narrowband filters.
The narrowband filter is designed to be added to
the RF signal path just after the distribution ampli-
fier in the MCU. The additional filter will provide a
narrower pass window for the multicoupler unit.
Model # Operating
Range
(MHz)
Band-
width
(MHz)
89-83F-02-03 792 to 806 3
89-83F-02-06 792 to 806 6
89-83F-02-09 792 to 806 9
89-83F-02-14 792 to 806 14
89-86A-02-03 806 to 824 3
89-86A-02-05 806 to 824 5
89-86A-02-10 806 to 824 10
89-86A-02-15 806 to 824 15
89-86A-02-18 806 to 824 18
Table 11: Optional Narrowband Filters.
Fault Indication
Main Cable
Disconnected
Base LED steady Red.
A and B LED flash Red.
“Tower Comm Lost” message
appears in sub-menu’s.
Test Cable
Disconnected
Base LED steady RED.
“Test Cable Not Connected”
message appears in the TEST
CABLE sub-menu.
CAT-5e Cable
Disconnected Base LED steady Green.
A and B LED flash Red.
“Tower Comm Lost” message
appears in sub-menu’s.
Table 10: Disconnected Cables.