Quantum and Evolution Series Installation and Operating Handbook
13-9
ESC Port
RS232, RS422 or RS485 external interfaces or
internal link to remote M&C port (software
selected). No external cabling required between the
ESC and M&C ports for M&C via ESC channel
within overhead. Other devices externally wired in
parallel with M&C port can also be accessed
remotely. Provides clock, data and sync (octet
timing) lines.
IDR
Synchronous access to 8kbps IDR
ESC. With the Async ESC option,
async ESC access to the 8kbps IDR
ESC is provided giving up to a 9600
baud async channel
Others
IBS and Closed Net Plus ESC facilities
as before installation of IDR option, but
now on ESC port on IDR card not
shared ESC/Aux port of base unit.
Aux Port
RS232 or RS422 (user selectable). Provides clock
and data lines
IDR
Provides 32 or 64kbps access in place
of one or both audio ESC channels.
IBS
Intelsat low rate ESC mode as
previously but now via Aux port on IDR
card not shared ESC/Aux port of base
unit. IDR option also adds sync IBS
mode, configurable to use between
1/32
nd
and 21/32
nd
of the IBS overhead
providing a full sync Aux port at
between 0.2% and 4.3% of the main
data rate.
Aux port provides satellite timing
information for P1500 slave Frequency
Standard when not configured for Aux
data access.
13.11
BERT Option Specifications
Parameter
Modem
BER Channel
The BERT may operate through main traffic, ESC
data or Aux data channels. Use of ESC & Aux data
channels allows continuous real traffic BER
performance monitoring while the modem carries
traffic.
Test Patterns
2
11
-1, 2
15
-1, 2
20
-1, compatible with common
standalone BER testers.
Results
Display of error count and average BER
Autolog
Automatic logging of average BER and other
parameters at regular intervals.
