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> Ttc/acterna 42522 v.35/rs-449/x.21DCE-dte interfacecard
Ttc/acterna 42522 v.35/rs-449/x.21DCE-dte interfacecard
TTC/Acterna 42522 "NEW" V.35/RS-449/X.21 DCE-DTE Interface Module for use in 6000/A Analyzer
V.35/306 Interface Specifications
The following are the specifications for the V.35 portion of this interface:
V.35 mode: dependent upon cable length
Delay, SCT to SD: 70 ns typical
Skew, SCTE to SD: 20 ns typical
Signal Swing (bipolar): ±0.55V ±0.1V into 10
Short circuit current: less than 100 mA
Data polarity: Mark (binary 1): "A" lead negative with respect to "B" lead
Space (binary 0): "A" lead positive with respect to "B" lead
Signaling polarity: ON:greater than +3VDC
RS-449 Interface Specifications
The following are the specifications for the RS-449 portion of this interface:
RS-449 Balanced: 15 Mb/s synchronous timing
(RS-422 T - terminated) 20 kb/s asynchronous timing
(RS-422 U - unterminated) 520 kb/s recovered timing
RS-449 Unbalanced: 128 kb/s synchronous timing
(RS-423) 20 kb/s asynchronous timing
Data polarity: MARK (binary "1"): "A" lead negative with respect to signal ground
SPACE (binary "0"): "A" lead positive with respect to signal ground
Signal polarity: OFF: "A" lead negative with respect to "B" lead
ON: "A" lead positive with respect to "B" lead
Short circuit current: 150 mA maximum
Output Level (both states): 0.9V
0 (Open circuit voltage, into 450W)
Output rise time (clock drivers): 1.2 ms maximum
Output rise time (signaling drivers): 10 ms typical
Short circuit current: 150 mA maximum
Differential output signal swing: 2 volts minimum (with a 10
Output rise and fall time: 20 ns maximum
Open circuit voltage: 6 volts maximum
Average DC offset: 0V ±0.4 volts
(specified with fail safe networks) (RCV DATA, RCV CLK, EXT TX CLK)
Single ended A to ground with B grounded
Input threshold: +/-0.2 volts (A versus B)
The following are the specifications for the X.21 portion of this interface:
X.21: dependent upon cable length
Data Polarity: MARK (binary "1"): "A" lead negative with respect to signal ground
SPACE (binary "0"): "A" lead positive with respect to signal ground
Signal Polarity: OFF: "A" lead negative with respect to "B" lead
ON: "A" lead positive with respect to "B" lead
Short circuit current: 150 mA maximum
Differential output signal swing: 2 volts minimum (with a 10
Output rise and fall time: 20 ns maximum
Open circuit voltage: 6 volts maximum
Average DC offset: 0V ±0.4 volts
(specified with fail safe networks): (RCV DATA, RCV CLK, EXT TX CLK)
Single ended A to ground with B grounded
Input threshold: ±0.2 volts (A versus B)
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