Comtech EF Data SLM-5650A Installation And Operation Manual page 471

In addition, to minimize 'false' acquisition, observe the following:
•
Use of IESS-315 V.35 Scrambler is highly recommended.
•
Keep the search delay range as narrow as possible – once the modem has reported the
search delay, narrow the search delay range to the nominal reported value ±5 ms – for
example, if the modem reported delay is 245 ms, narrow the search range to say 240-
250 ms.
•
Use external data source (e.g. Fireberd) or internal BER tester when testing CnC
performance.
•
To prevent self-locking in case the desired carrier is lost, it is recommended that the two
carriers have some configuration difference – for example, use different settings for
Spectrum Inversion.
Appendix H G–5
SLM-5650A Satellite Modem
Revision 10
MN-SLM-5650A