Table 2-6. Summary Of Open Network Options; Table 2-7. Acquisition And Timing Performance Requirements - Comtech EF Data SLM-5650A Installation And Operation Manual

Parameter
IDR
IBS
Parameter
The following reference E
FEC not enabled.
Initial Acquisition
Reacquisition
BCI
System Retention
Receive Timing Jitter
Doppler
Specifications

Table 2-6. Summary of Open Network Options

INTELSAT IESS-308 (Framing only)
•
INTELSAT IESS-310 (Framing only)
•
INTELSAT IESS-310 (Framing only)
•
INTELSAT IESS-309 (Framing only)
•

Table 2-7. Acquisition and Timing Performance Requirements

/N is defined as the required E
b 0
The modem achieves initial acquisition within the times as specified within ± 30 kHz
at the reference E
For baseband data rates between 64 kbps and ≤ 128 kbps, the maximum initial
acquisition time is 500 seconds.
For Baseband data rates between 128kbps and ≤ 1544 kbps, the maximum initial
acquisition time is 30 seconds.
For baseband data rates > 1544 kbps, the maximum initial acquisition time is 1.5
seconds.
Reacquisition is achieved, as follows, after a period of up to 15 minutes of the
absence of signal when the carrier returns to within 500 Hz of its original frequency.
For baseband data rates between 64 kbps and 128 kbps, the maximum
reacquisition time shall be 45 seconds.
For baseband data rates between 128 kbps and 1544 kbps, the maximum
reacquisition time shall be 20 seconds.
For baseband data rates greater than 1544 kbps, the maximum reacquisition time
shall be 1 second.
With Tx and Rx random data, the mean time to loss of BCI due to falsely adding or
deleting bits is at least 3 days at the reference E
maintains BCI over 50 consecutive bits of all ones or zeros, which occur no more
than once in 10,000 bits, without employing data scrambling.
Synchronization and BCI are maintained for all E
(BPSK / QPSK / OQPSK / 8PSK) for signal loss of up to 50 modulation symbol
periods, with a probability of at least 90 percent.
The Rx output clock peak timing jitter cannot exceed ± 5 percent at the reference
E /N when the modulated signal meets the modulation timing jitter requirement.
b 0
The modem meets the requirements with a Doppler shift, rate of change, and
acceleration for satellite inclination up to ± 7° as presented in Table 2-8, and an
additional 0.5 dB added to the reference E
Open Network Options
Specifications
Specification
/N corresponding to a BER of IE-3 with Reed-Solomon
b 0
/N
b 0
/N
b
2–5
SLM-5650A Satellite Modem
Revision 10
/N . In addition, the modem
b 0
/N above the reference E
b 0
.
0
MN-SLM-5650A
/N
b 0