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which has 2 inputs is less than 1.2V, the level is high. When voltage is more than 1.5V, the level is
low.
USER Output Ports: IDU has 4 user output ports which is type C relay output. The trigger current of
relays are 1A 30VDC, 0.3A 60VDC, and 0.5A 125VAC.
The type of output ports could be configured via textmenu or SNMP software. It has following 3
types:
(1) Forcible Output: There are three options, Not in use, Always open, and Always close. It is used for
remote access such as remote control over air conditioning of base station. When you choose "Not in
use", the relay stays in "NC".
(2) Alarm Relay Output: You could choose following alarm types for output: Tx(when alarm happens
concerning Tx), Rx(when alarm happens concerning Rx), and Tx
concerning both Tx & Rx). The chosen alarm level is low. These alarms are important alarms and
would influence normal transmission. When alarm happens, the relay stays in "NO".
(3) User Input – Relay Output: User could choose user input as relay output via textmenu or SNMP
software. It could be used for automatic monitoring of base station. When user input detects voltage
to be low, the relay stays in "NO". When it detects to be high, the relay stays in "NC".
L.
Data Port 1 (AUX1): Use the Windows OS's HyperTerminal function (9.6K). User could implement
NO
NC
C
Figure 4-6 Type C Relay Output Diagram
RX alarm = PLL_RX + DEM + MUX
TX alarm=PLL_TX MOD
26
Figure 4-7 User I/O Port DB-26 pin
4-5
Product Description
E1 Spread Spectrum Radios
NO
Normal open
NC
Normal close
C
Common
Rx(when alarm happens
1
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