Test:) Bert; Test:) Lamptest - Comtech EF Data SLM-5650A Installation And Operation Manual

7.2.5.3

(TEST:) BERT

BERT: Tx:Off Pattern:2047
Reset Rx:Off Errs:=0000000 BER:NoSync
Use the arrow keys to select Tx, Pattern, ErrIns, Reset, Rx, Errs, or BER. Press [ENT]. For
any option, use the  arrow keys to select the desired setting. Press [ENT] to execute the test.
BERT
Mode Description
Option
Tx Select to turn the transmit test pattern generator On or Off.
Pattern
Select from the available patterns:
• Mark – All ones.
• Space – All zeros.
• 1:1 – A one followed by a zero and then repeats.
• 1:2 – A one followed by two zero's and then repeats.
• 2E15-1 – A pseudo-random data pattern of 2^15 –1, compatible with standard BERTs.
• 2E20-1 – A pseudo-random data pattern of 2^20 –1, compatible with standard BERTs.
• 2E23-1 – A pseudo-random data pattern of 2^23 –1, compatible with standard BERTs.
• MIL188 – A modified pseudo-random data pattern of 2^11 –1, compatible with the MIL-188-165
• 2047 – A pseudo-random data pattern of 2^11 –1, compatible with standard BERTs.
ErrIns Select to insert a single error into the data stream by pressing [ENT].
Reset Select to restart the BER test and clear the error and BER displays.
Rx Select to turn on the receive bit error test set.
Errs
Select to view the absolute number of errors counted.
BER
Select to view the bit error rate as measured by the modem.
The BER function can work with a Fireberd supplying the transmit data test
pattern, while only turning on the Rx BER tester. The transmit test pattern
generator can be turned on at the far end of the link as long as the test
patterns match the Rx BERT. An external bit error test set can be used even
when the internal bit error test set is enabled. If AIS is enabled, the data will
be overwritten with all ones.
7.2.5.4

(TEST:) LampTest

Select LampTest to perform a diagnostic run on the front panel LEDs and VFD.
Front Panel Operation
ErrIns
test data pattern requirement of a continuous stream of 50 zero's every 10,000 bits. This pattern
has 5 normal 2047 patterns, with the fifth patterns longest string of zero's (11) stretched an
additional 39 bits to create a lack of transitions for 50 bits approximately every 10,000 bits.
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SLM-5650A Satellite Modem
Revision 10
MN-SLM-5650A