User's Manual

CrossFire HP – All-Digital Transport System

User Guide

AU is 0dBm and the maximum allowable input power is 10dBm. Therefore, before accessing the RF signals, estimate the

signal power. Monitor the downlink input power with a spectrum analyzer or read the downlink input power from the

“Digital Info” on the WebOMT in order to set the downlink input power within the appropriate range. The adjustable

attenuation value of each AU channel is 5dB, which can be set in Engineering ―> Real-time Info ―> RF Channel x.

See Figure 7-5 for details.

Figure 7-5 Channel Gain Adjustment

7.4. Alarm Parameters Setup

After completing the radio-frequency channel properties configuration, set up the alarm parameters using the

following procedure:

1. In the WebOMT, select the Engineering tab.

2. Set the status of the optical transceiver one by one.

3. If there is an optical path connection, enable the basic device alarms, such as Power Interruption Alarm,

Battery failure Alarm, MOV Alarm, etc.

For alarms related to channel properties, such as the DPLL unlocked Alarm, LO unlocked Alarm, OP transceiver

failure Alarm, etc., only enable those associated with the channels which have an input signal, to avoid unnecessary

alarms. See Figure 7-6 for details.

Wait 3~5 minutes after completing the setup, then query to see if there is a failure alarm for the device. If there is

an alarm, see Section 9 to resolve the issue.