Comtech EF Data C5 - Manual (Page 78)

Specifications C5/K1/K3 Integrated Satellite Terminal System
2–44 Rev. 0
2.5.2.4 EIA-449/EIA-422 Specifications
Refer to Table 2-25 for EIA-449/EIA-422 specifications.
Table 2-25. EIA-449/EIA-422 Specifications
EIA-449/EIA-422 Specification
Circuit Supported SD, ST, TT, RD, RT, DM, RR, RS, CS, MC
Amplitude (RD, RT, ST, DM,
RR)
% 2V differential into 100!
Impedance (SD, TT, MC) 4k
!
True when B positive with respect to A
False when A positive with respect to B
Phasing (RD, RT) False-to-True transition of RT nominally in center of RD data
bit.
Symmetry (ST, TT, RT) 50%
% 5%
SD-A, SD-B Send Data
ST-A, ST-B Send Timing
RD-A, RD-B Receive Data
RS-A, RS-B Request to Send
RT-A, RT-B Receive Timing
CS-A, CS-B Clear to Send
DM-A, DM-B Data Mode
RR-A, RR-B Receiver Ready
TT-A, TT-B Terminal Timing
MC-A, MC-B Master Clock
MF MOD Fault (ttl)
DF DEMOD Fault (ttl)