User's Manual

Page 31
M Series Data Radio – User Manual
© Copyright 2004 Trio DataCom Pty. Ltd.
Bar Graph Indicators
The bar graph indicators on the front panel provide variable information
regarding the performance of the Base Station. To enable / disable the
bar graph display depress the Display ON / OFF button. The display
will turn off automatically after 5 minutes.
DC Supply:
Indicates the supply input voltage at the exciter module. Typically
13.8Vdc.
Indication: <10Vdc no LED’s on, 10-10.9Vdc LED’s RED, 11-
15.6Vdc All LED’s GREEN, >=15.7Vdc last LED RED.
Tx Power:
Indicates forward RF power output as measured at the TX antenna
port. Typically +37dBm.
Indication: <20dBm no LED’s on, 20-40.6dBm (11.5W) LED’s
GREEN, >=40.7dBm last LED RED.
Tx Drive:
Indicates exciter drive level. Typically +20dBm.
Indication: <10dBm no LED’s on, 10.0-25.9dBm LED’s GREEN,
>=26.0dBm last LED RED.
Rx Sig:
Indicates receive signal strength. Typically -85 to -65dBm.
Indication: <-120dBm no LED’s on, -120 to -110.1dBm LED’s RED,
>=-110dBm LED’s GREEN.
RxFreq. Offset:
Indicates offset of receiver AFC - useful in determining frequency drift.
Typically 0kHz.
Indication: Single GREEN LED to indicate current value, <-3.6kHz or
>+3.6kHz LED is RED. No signal, all LED’s OFF.
Note: 5 second peak hold circuitry.
Part E – Getting Started - EB450
Test Mode
The Bar Graph indicators have a Test Mode, which cycles all LED’s
for correct operation (before returning to their normal operation). To
activate this mode, simply depress the ON / OFF button while
applying power to the unit.
Hardware Error
A hardware error is indicated on the status LEDs by all LEDs flashing
RED at a rate of 1Hz. This indicates internal communications to the
exciter inside the basestation has been lost and the base station needs
to be returned to repair.
Received Signal Indicator
The “RX/SYNC” LED indicates the state of the receiver.
If the LED is off, no signal is being received.
A RED indication shows that an RF carrier is being received, but no
data stream can be decoded. This will briefly happen at the very start
of every valid received transmission or may indicate the presence of
interference, or another user on the channel.
A continuous GREEN indication shows that the modem is locked and
synchronised to the incoming signal, and has excellent Bit Error Rate
(BER). Any losses of synchronisation (BER errors) are shown as a
visible RED flicker of the LED.
Note: This might only be apparent on a PTMP slave when only
receiving.
Data Flow “breakout” LEDs
There are also two LEDs to indicate data flow into and out of the two
user ports.
Input data to be transmitted is shown as a RED flash, and received
data to be output to the port is shown as a GREEN flash.
If data is alternately flowing in and out quickly, then the indicator
appears Orange.
LED Indicators & Test outputs
Radio is Powered
If all the LEDs are off, no power is reaching the radio modem.
Successful power-up is indicated by the “PWR” LED indicating a
continuous (healthy) GREEN state. Note that this LED is turned RED
when the transmitter is active.
LED Legend