User's Manual Part 2

ADCP-75-187 • Preliminary Issue 1B • November 2005 • Section 3: OPERATION
Page 3-15
© 2005, ADC Telecommunications, Inc.
2.6 Reference Procedure: Enter Host Reverse Attenuation
The level of the RF signal that should be input to the EBTS will vary depending on the type of
EBTS, the receive distribution, and the number of channels present. To interface with the EBTS,
the reverse path signal level must be adjusted to provide the signal level required at the EBTS
input port(s). The HU provides from –1 to +30 dB of gain in the reverse path. By default, the
host reverse attenuator is set to –31 dB of attenuation which provides –1 dB of gain. Use the
following procedure to set the reverse path gain:
1. Check the EBTS manufacturer’s specifications to determine the composite signal level
required at the reverse path input port(s). Note that 800/900 MHz SMR host units have two
reverse path input ports.
2. Determine the overall gain and loss imposed on the signal by the antenna, antenna cable,
and by the cables that connect the HU to the EBTS.
3. Determine the amount of gain required to raise the reverse path signal to the level required
at the EBTS.
4. Click on the HOST RF tab. The HOST RF display will open within the EMS main
window as shown in Figure 3-11.
Figure 3-11. Typical HOST RF Display
5. Click on the Host Rev Att field Edit button (see Figure 3-11). The Host Rev Att pop-up
screen will open as shown in Figure 3-12.
Click Edit button to
open the Host Rev Att
pop-up screen