User Manual

AS4000 Subscriber Terminal
Installation and Commissioning
DLP 011
605-0000-454
Draft Issue 1.3 Date 8/02/00
Page 2 of 4
Receive Signal
Strength Indicator
(RSSI)
Ground for RSSI
Ground for
Lightning
Protection
Turn Antenna to achieve maximum
voltage reading on DVM
Digital Voltmeter (DVM)
Tie Wrap to prevent
assembly sliding
down pole while
panning
Strain Relief Strap.
Ensure minimum
bend radius (70mm )
is not exceeded
Figure 65. Panning Pole Mount Antenna
2. Panning Bracket Mounted Antenna
1. Loosen the antenna fixing bolts sufficient to allow the antenna to move freely
2. Point the Antenna in the general direction of the Central Terminal Antenna
3. Using the DVM, measure the DC voltage between Ground and the Receive
Signal Strength Indicator (RSSI) Monitoring point on the Antenna (see Figure
66). The voltage measured is a relative indication of the received signal
strength; The lower the voltage the weaker the RX signal, and vice versa. A
reading of 1.4volts or greater indicates a viable link. A more accurate indication
of signal strength can be view using STMON connected to the SIU.
4. Whilst observing the voltage on the DVM, pan the Antenna through the peak
point, then pan back to it. If there is not sufficient panning range use the other
mounting point on the Antenna mounting bracket in order to pan through the
peak. Record the peak RSSI voltage in the test form.
5. Using a 13mm spanner or socket torque the pivot bolts to 12Nm.