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TELECOMMUNICATIONS TECHNIQUES CORPORATION
51
SECTION 7
INTERFACE SPECIFICATIONS
7.1 INTRODUCTION
This section contains the specifications for the RS-449/530/MIL Interface Adaptor. This information is listed in Table 7-1.
Table 7-1
RS-449/530/MIL Data Interface Specifications
Item
Specification
Maximum Speed
MIL-188C
64 kb/s synchronous timing
20 kb/s asynchronous timing
64 kb/s recovered timing*
EIA 530, MIL-188-114, RS-449 Balanced
15 Mb/s synchronous timing
20 kb/s asynchronous timing
520 kb/s recovered timing*
EIA 530, MIL-188-114, RS-449 Unbalanced
128 kb/s synchronous timing
20 kb/s asynchronous timing
128 kb/s recovered*
Normal Data Polarity
MIL-188C
MARK (binary “1”): “A” lead positive with respect to signal
ground.
SPACE (binary “0”): “A” lead negative with respect to
signal ground.
RS-423/MIL-188-114 UNBAL
MARK (binary “1”): “A” lead negative with respect to signal
ground
EIA 530 UNBAL
SPACE (binary “0”): “A” lead positive with respect to signal
ground
RS-423/MIL-188-114 BAL
MARK (binary “1”): “A” lead negative with respect to”B”
lead.
EIA 530 BAL
SPACE (binary “0”): “A” lead positive with respect to “B”
lead.
Normal Signal Polarity
(signal polarity may be inverted)
RS-422/MIL-188-114 BAL
OFF: “A” lead negative with respect to “B” lead.
EIA 530 BAL
ON: “A” lead positive with respect to”B” lead.
RS-423/MIL-188-114 UNBAL
OFF: “A” lead negative with respect to signal ground.
EIA 530 UNBAL
ON: “A” lead positive with respect to signal ground.
*FIREBERD 6000 with clock recovery option
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