Comtech EF Data ODM-840 - Manual (Page 136)

ODM/R-840 Outdoor Remote Router Revision 0
Ethernet-based Remote Product Management MN-ODM840
5–48
• Group ID – Enter the Group ID number for the CDD‐880 to which this CDM‐840 belongs. The
valid range is 0 to 255.
• Power Hunt Enable – Use the drop‐down menu to select this function as Disable or Enable.
When enabled, the transmission power control feature for the unit modulator is activated
while in Entry Channel Mode (ECM). This function provides compensation during periods of
impaired transmission or for instances when the initial (baseline) power value is insufficient,
and assists in maintaining return link integrity.
• Rx LO Frequency – Assign a value, in MHz, to the Rx LO (Low Oscillator) Frequency.
• Tx LO Frequency – Assign a value, in MHz, to the Tx LO (Low Oscillator) Frequency.
• Base Power – Enter the power level, in dBm, for transmission of the Aloha ECM signal. This
level was determined for this CDM‐840 when its terminal was commissioned, and must be
calibrated with the satellite provider. The valid range is from ‐40.0 to 0.0 dBm.
Click [Submit] to save these settings.
ECM Remote Status (read-only)
• Cycle Length – The Cycle Length is the total length of time, in milliseconds, between the
start of a transmission and the completion of the transmission (TAP) cycle transmitted by
the CDD‐880 to the ODM/R‐840 Remote Routers in the ECM group. It is the product of the
number of slots and the slot length (consisting of the preamble, data slot size, and guard
band).
• Aloha State – The Aloha State indicates the current state of this unit during the ECM cycle:
State Description
Idle Unit is not transmitting; either inactive or waiting for switching assignment.
Active Unit is actively transmitting (probing) to the Hub for either registration or
request for switching to dSCPC.
Switched Remote has successfully switched from ECM to dSCPC.
• Current Tap – Indicates current value of sequential progression of TAP message
transmission. Ranges from 0 to 255, then repeats.
• Current Slot – The time slot number in the transmission cycle that this unit has been
assigned for switching from ECM to dSCPC.
• Home State Revert Timer – The time, in seconds, that must pass without receiving
communications from the HCC (Hub Channel Controller – i.e., Demod #1 on the CDD‐880,
the designated ECM controller) TAP message before this unit is reverted from dSCPC mode
back to ECM to re‐establish communications settings for receiving the TAP. This parameter
is set in the VMS.