Comtech EF Data SNM-1010L - Manual (Page 45)

SNM-1010L Data/Control Modem Revision 0
Installation MN/SNM1010L.OM
2.3.4.4 EIA-530 Specifications
Table 2-9. EIA-530 Specifications
Parameter Specification
Circuit Supported BA, DB, DA, BB, DD, CC, CF, CA, CB,
Amplitude (BB, DD, DB, CC, CF) ± 2V differential into 100 Ω
Impedance (BB, DD, DB, CC, CF) Less than 100 Ω, differential
Impedance (BA, DA, CD) 4k Ω
True when B positive with respect to A
False when A positive with respect to B
Phasing (BB, DD) False-to-true transition of RT nominally in center of RD data
bit
Symmetry (DB, DH, DD) 50% ± 5%
2.3.4.4.1 EIA-530 25-Pin D Connector Pinouts
Table 2-10. 25-Pin D Female Connector Pinouts
Pin # EIA-530
1 SHLD
2 BA
3 BB
4 CA
5 CB
6 CC
7 AB
8 CF
9 DD
10 CF
11 DA
12 DB
13 CB
14 BA
15 ST
16 BB
17 DD
18 LL
19 CA
20* CD
21 DF
22 CC
23* CD
24 DA
25 MF
*Note: Use the MASTER clock for EXTERNAL clock input. This clock input should
equal the data rate
2–11