iRZ ATM2-232, Руководство по эксплуатации

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2.11.1. Signal Strength Indicators
The ATM modem is equipped with the
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hard reset button which also designed for detecting the signal
strength of the modem. This feature allows you to find an optimum place to mount the modem antenna on a
site. Signal strength is displayed in the log and indicated by the LED for each SIM card of the modem.
To determine the signal strength, press the button using a thin object and release it. The LEDs indicate the
signal strength within a minute, after that the modem returns to the previous operation mode. With GPRS or
CSD connection established, the connection is terminated by pressing the button, and after the end of signal
verification it is re-established. Signal detection is not supported in the service mode.
When pressing the button, both LEDs light up for 2 sec, after the pause of one second active SIM LED starts
to blink in accordance with signal strength of its SIM card (only if modem is registered in GSM network).
Depending on the CSQ signal strength, the LED of each SIM card blinks certain times:
signal strength is below 9
– 1 time;
signal strength is from 9 to 15
– 2 times;
signal strength is from 16 to 19
– 3 times;
signal strength is from 20 to 24
– 4 times;
signal strength is above 24
– 5 times;
Each LED blinking lasts for 80 / 400 ms: 80 ms
– LED is on, 400 ms – LED is off. The pause of 4 seconds is
followed by LED blinking of certain number of times. After that the modem detects signal level, and the process
is repeated
– the LED blinks the number of times corresponding to the CSQ signal strength then follows a four-
second pause
– and so until a minute passes from the time the button has been pressed (see the sample in
Fig. 2.8).
Fig. 2.8 Signal Strength Indicators (a sample for the strength from 16 to 19 via CSQ)
2.12. Parameters and Attributes Used
Key Attributes of the ATM2-232 Modem
1.
Device model
– Automatic Terminal-Modem ATM2-232.
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The button is placed on the side of the modem with the RS232 connector (see Fig. 2.3). Early models are not equipped
with this button. The hard reset button function is described in section "Updating Embedded Software (Firmware)" .