Mounting and Installation
© Siemens AG 2002 All Rights Reserved 6NH7811-0AA22
MD2 Modem (07/2002)
2-13
Setting on
DIL Switch
Meaning
1234
OFF
ON
5678910
Test mode: Test send RS485
In this test mode a short message (2 bytes) is continuously present in
asynchronous 11-bit format at the modem transmitter output and the
RS485 port.
1234
OFF
ON
5678910
Test mode: Test send
In this test mode a short message (2 bytes) is continuously present in
asynchronous 11-bit format at the modem transmitter output.
1234
OFF
ON
5678910
Test mode: Test receive
You can use this test mode together with test modes "Test Send
RS485" and "Test Send" to check the transmission line or the receiver
section of the modem.
1234
OFF
ON
5678910
Test mode: Test f
baud
In this test mode the lower and the upper keying frequencies are,
continuously changing according to the transmission speed, present
at the modem transmitter output.
This corresponds to the binary sequence 01010101... .
1234
OFF
ON
5678910
Test mode: Test f
L
In this test mode the lower keying frequency is continuously present at
the modem transmitter output.
1234
OFF
ON
5678910
Test mode: Test f
H
In this test mode the upper keying frequency is continuously present
at the modem transmitter output.
Note
Details about the individual operating modes are available in Chapter 4 Operating
Modes and Character Recognition.
Setting the Character Recognition
The character recognition is set on switches 5 to 7 of the 10-pin DIL switch.
The procedure is as follows:
Switch off the power supply of the modem and make the desired settings using the
DIL switch. When the power is switched on the selected settings for the character
recognition become active.
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