Honeywell International Inc. 9PGTPL-100A 用户手册
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1 Mar 2006
34-45-54
MAINTENANCE MANUAL
TPL-100A Processor / Part No. 940-0530-001
Use or disclosure of information on this page is subject to the restrictions in the proprietary notice of this document.
NOTE: The type of cable selected to meet the dB loss requirements of the top
antenna cable can be different from the type of cable selected to meet the
dB loss requirements of the bottom antenna. For example: if the cable
run to one antenna is long and the cable run to the other antenna is short,
the long run may require a low loss antenna cable to meet the less than
3 dB antenna cable/interconnect requirement. The short run may require
a relatively high loss cable to exceed the 2 dB antenna
cable/interconnect loss requirement.
dB loss requirements of the bottom antenna. For example: if the cable
run to one antenna is long and the cable run to the other antenna is short,
the long run may require a low loss antenna cable to meet the less than
3 dB antenna cable/interconnect requirement. The short run may require
a relatively high loss cable to exceed the 2 dB antenna
cable/interconnect loss requirement.
(i) Consult the manufacturer's data sheets to determine the nanosecond delay in
each foot (at 1030 MHz) for the type or types of cable selected in step (h).
(j) Calculate the round-trip (receive/transmit) cable delay in the top antenna cable run
and then the bottom antenna cable run as follows:
Length of cable [see step (a)] X nanosecond delay per foot [see step (i)] X 2
(round-trip) = cable run delay.
(round-trip) = cable run delay.
Example: Top cable length = 65 feet
Top cable delay = 1.25 nanoseconds per foot
Round-trip top cable delay = 65 x 1.25 x 2 = 162.5 nanoseconds
Round-trip top cable delay = 65 x 1.25 x 2 = 162.5 nanoseconds
Bottom cable length = 20 feet
Bottom cable delay = 1.25 nanoseconds per foot
Round-trip bottom cable delay = 20 x 1.25 x 2 = 50 nanoseconds
Bottom cable delay = 1.25 nanoseconds per foot
Round-trip bottom cable delay = 20 x 1.25 x 2 = 50 nanoseconds
(k) Subtract the smallest round-trip cable delay from the largest round-trip cable delay
to determine cable delay difference between top and bottom antennas.
Example: Top round-trip cable delay = 162.5 nanoseconds
Bottom round-trip cable delay = 50.0 nanoseconds
Top/Bottom Cable Delay Differential = 112.5 nanoseconds
(see note below)
Top/Bottom Cable Delay Differential = 112.5 nanoseconds
(see note below)
NOTE: Antenna delay program pins are supplied on the MILACAS-FR Processor
rear connector that allow straps to be installed to compensate for up to a
350 nanosecond delay difference between the top and bottom antenna
cable runs. If the top/bottom antenna cable delay differential does not
exceed 350 nanoseconds, selection of the appropriate antenna delay
program pin strapping compensates the delay differences to within 50
nanoseconds.
350 nanosecond delay difference between the top and bottom antenna
cable runs. If the top/bottom antenna cable delay differential does not
exceed 350 nanoseconds, selection of the appropriate antenna delay
program pin strapping compensates the delay differences to within 50
nanoseconds.
If the top/bottom cable delay difference calculated in step (k) exceeds 350
nanoseconds, steps (h) through (k) must be repeated using different cable type(s).
nanoseconds, steps (h) through (k) must be repeated using different cable type(s).