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4.2 RS-422/485 Driver Control
Select the method of controlling RS-422/485 transmission driver IC for simulation on RS-422/485 port.
Press [MENU] then touch “Interface
” -> “Measurement port: RS-422/485” -> “Driver control”. For an optional in
-
terface board, “OP-SB10N”, select “Measurement port: RS-530”.
2.3 Measurement Port
For standard sub-board
For optional sub-board “OP-SB10N”
ڦ
Driver Control
OFF
:
Select this for testing RS-422 (full-duplex), X.20/21, RS-449 and V.35 using “OP-SB10N”.
Driver IC will always be in an enable state after starting test.
Manual
: When DTR (for DTE mode) or DCD (for DCE mode) is ON, the driver will be in an enable
state. And when DTR or DCD is OFF, the driver will be in disable (high impedance) state. It is
used to control the driver IC manually for Manual or Program mode.
When OP-SB10N sub board is inserted to the analyzer and "Auto line control" is checked, the driver IC
is controlled according to the state in which the DTR and DCD are automatically controlled.
When “Auto line control” is set OFF, the initial state at the start of simulation is below:
AUTO
:
Select “Auto” for testing RS-485 in half duplex. The driver automatically be in an enable state
during the transmission of test data, and the driver will automatically be in disable after about 1
to 3 bits is delayed (400u seconds at least) after data transmission.
Simulation mode
Initial State of TXD Driver IC
MANUAL mode
High impedance state
FLOW Mode
Enable
ECHO Mode
Enable
POLLING Mode
Enable
BUFFER Mode
Enable
PROGRAM Mode
High impedance state
Содержание LE-2500XR
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