Bird Technologies 429-83H-01 Series-Installation Instructions - Manual (Page 10)

TX RX Systems Inc. Manual 7-9440-2 11/17/08 Page 4
and saved. Figure 6 shows the SETTINGS area of
the screen.
The first value, TTA Net Gain, allows you to select
the TTA Net Gain attenuation value. This box will
be active whenever the attenuator status area is
set to manual and will be inactive when the attenu-
ator status area is set to automatic. In the auto-
matic mode the TTA Net Gain attenuation value is
computed automatically for you using the values
you have entered for “Desired TTA Net Gain” and
“Main Transmission Line Loss” as shown in figure
6. Remember to press the command interface but-
ton to transmit your selection to the TTA.
The second value, Distribution Gain Attenuator
allows you to program the distribution gain attenua-
tion value into the TTA. Remember to press the
command interface button to transmit any changes
you make to the TTA.
The next two values, Desired TTA Net Gain and
Main Transmission Line Loss allow for automatic
calculation of the TTA Net Gain attenuator. These
boxes are active when the attenuator status area is
set to automatic and they are inactive when attenu-
ator status is set to manual. Remember to press
the command interface button to transmit your
selection to the TTA.
The Static Sensitivity box provides a place to store
your measured sensitivity value and the frequency
you made the measurement at.
The Dynamic Sensitivity Frequency box allows the
selection of Low, Medium, or High. In order to
check for sensitivity degradation, especially over
wide frequency ranges in combined 700/800 Mhz
systems, measurements at the lowest, midrange,
and highest frequencies are recommended.
The box for Test Transmission Line Loss provides
a place to store the loss value of your test trans-
mission line.
The box for Distribution Transmission Loss pro-
vides a place to store the loss value of your distri-
bution transmission line.
Figure 5: Attenuator Status.
Figure 6: Settings.