User's Manual

EX7100 Technical Manual – Monitoring and Diagnostics
©1999 Exicom Technologies (1996) Ltd 4-10 Issue 1 - February 2001
4.4.4 Low RSSI Alarm
The user may set an RF level (-40 dBm to -106 dBm) at which the Low RSSI Alarm will
trigger. To set this trigger point:
1) From idle, press ‘Enter’
Use the arrow keys to enter the First Level
password ‘1111’ and then press ‘Enter’.
2) Use the up and down arrow keys until the
→
→→
→ is next to RF Parameters and then
press ‘Enter’
3) Use the up and down arrow keys to
position the →
→→
→ next to RSSI and then
press ‘Enter’.
4) Press the down arrow key then press
‘Enter’.
5) Use the up and down arrow keys to
select the required alarm trigger point,
then press ‘Enter’.
The currently selected setting is indicated
by an asterisk.
6) Press ‘Escape’ until the display returns to
idle
4.4.5 Over Temperature alarm
The UHF 10 Watt system requires fan assisted cooling, due to the extra heat generated
by the power amplifier. Two fans are controlled by the transmitter CPU. If the heatsink
temperature exceeds 45°C one fan will be turned on.
Every 40 hours (approx) the CPU will switch between the two fans to ensure an even
lifecycle. If the heatsink temperature continues to rise above 55°C, both fans will be turned
on simultaneously. If the heatsink temperature exceeds a maximum permitted level of
60°C, normally due to a total fan failure, an alarm will be generated.
4.5 Diagnostic Tools
4.5.1 System Align Mode
To enable the user to retune the EX7100’s RF section with the minimum of external test
equipment, the terminal may be put into an Align Mode.
In this mode, the internal modem is set to output fixed data patterns, with a constant AGC
level, and the transmitter is keyed on. The user is then able to retune the Transmitter
module as per the instructions in Section 7.
Note: Two modes can be used to retune the RF Modules.
→RSSI
Tx power
Rssi : -75dbm
→set alarm point
Password ∗ ∗ 1 ∗
↑
→rf parameters
framer
* -100 dbm
→-98 dbm