Operating Manual 6175.4760.02 – 01 4.139
M3SR Series 4100 Switching the EOM Flag
4.5.4.6 Switching the EOM Flag
Softkey Type Description
Toggle 1. Press softkey to toggle EOM sequence
on/off.
Possible values:
•ON
•OFF
With this softkey, the transmission of an end of
message (EOM) flag can be enabled or dis-
abled.
The EOM sequence is used to signal the re-
ceiving HF Modem the end of the transmis-
sion.
By decoding EOM, the HF Modem will return
to acquisition immediately, to be ready for the
next transmission or reception.
The use of an EOM is recommended. Howev-
er in conjunction with the use of a fixed maxi-
mum message block length e.g. with an
external ARQ protocol, it can make sense to
deactivate EOM to increase the user data
throughput.
This parameter is adjustable for HF Modem
type STANAG 4539 only.
For STANAG 4285 and STANAG 4529 the
use of an EOM flag is mandatory and cannot
be disabled.
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