G.703 Specifications; A.1.8 Variable Data Rates; Table A-19. G.703 Specifications; A.1.7.1 G.703 Specifications - Comtech EF Data SDM-300A Installation And Operation Manual

SDM-300A Satellite Modem
A.1.7.1

G.703 Specifications

Refer to Table A-19 G.703 specifications.
Primary Data Circuits Supported
Interface Type
Data Rates
Pulse Width
SD Amplitude
RD Amplitude
Pulse Mask
Jitter Attenuation
Line Code

A.1.8 Variable Data Rates

The basic platform modem comes with single data rate capabilities. At the time of
purchase, the customer may add optional variable data rate capabilities. If variable rate
requirements arise after the purchase of a basic platform modem, these capabilities can be
added in the field using FAST technology. The variable rate options include one of the
following:
•
•
Rev. 4

Table A-19. G.703 Specifications

Parameter
Rates up to 512 kbit/s
Rates up to 4.375 Mbit/s
Specification
T1 SD, RD
E1 SD, RD
Transformer coupled symmetrical pair
T1 1544 kbit/s ± 100 bit/s
E1 2048 kbit/s ± 130 bit/s
T1 324 ± 50 Ns
E1 244 ± 25 Ns
T1 3V +0.3/-1.5V-pk into 100Ω
E1 3V +0.3/-1.5V-pk into 120Ω
T1 3V +0.3/-1.5V-pk into 100Ω
E1 3V +0.3/-1.5V-pk into 120Ω
T1 G.703.2
E1 G.703. 6
T1 G.824
E1 G.823
AMI, B8ZS, B6ZS, HDB3
Options
A–59