Comtech EF Data Vipersat CDM-570L, User Manual

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Vipersat Configuration
3-14
Vipersat CDM-570/570L User Guide
Note: Refer to the Viper Calculator for determining preamble length
values to enter at the command prompt. If you not have a copy of
the latest Viper Calculator, contact your Comtech Vipersat
Networks representative to inquire about a copy.
Slot Data Length
This menu item displays the Slot Data Length in milli-seconds and bytes for the
target CDM-570/570L, and represents the amount of data that can be transmit-
ted or received in one spin of the STDMA cycle by each of the Remotes belong-
ing to that group.
Depending on the Hub type that is defined for the modem, the appearance of
this parameter will vary:
•
Fixed – Slot Data Length
•
Dynamic Slot – Nominal Data Length, Minimum Data Length
•
Dynamic Cycle – Maximum Data Length, Minimum Data Length
•
ECM & GIR – Minimum Data Length
On a Hub unit, entering B and M at the command prompt brings up the dialogs
for specifying the data length in milli-seconds for the target CDM-570/570L, as
shown in figure 3-15.
On Remote units, this menu item is an information-only display.
Figure 3-15 Slot Data Length (Nominal)
Slot Cycle Length
This menu item is for information only and displays the slot cycle length in
milli-seconds and bytes for the target CDM-570/570L. This value represents the
total amount of time (preamble, data length, and guardband) allocated to the
remote modem during one spin cycle.
NOTE