User's Manual

CrossFire – A revolution in RF Transport for In Building Wireless
User Manual
80 Revision 1.0.1
7.3. Channel Gain Adjustment
After setting the channel properties, access the RF signals. In the IDAS, the nominal downlink input power of the AU
is 0dBm and the maximum allowable input power is 15dBm. Therefore, before accessing the RF signals, estimate the
signal power. Monitor the downlink input power with a spectrum analyser or read the downlink input power value from
the “Combiners” on the WebOMT in order to set the downlink input power within the appropriate range.
To adjust gain on AU WebOMT (see Figure 7-5):
1) In the AU WebOMT, select the Engineering tab.
2) Select the Combiners sub-tab on the Engineering page.
3) Check the input power value of the port which there is input signals. See Figure 3-4 for active combiner ports.
4) Set the attenuation value. For example, the input power value of port 1 channel 1 is 3.499 dBm, then enters
3.50 attenuation in port 1 Attenuation value and click set to confirm.
Figure 7-5 Gain Adjustment on AU Combiners
5) Select the System Info sub-tab on the Engineering page.