Comtech EF Data CDM-570 - Manual (Page 473)

CDM-570/570L Satellite Modem with Optional IP Module Revision 12
Appendix K MN/CDM570L.IOM
K–11
(ODU SELECT) ODU CONFIG: MISC Æ LNA Æ Curr-Window
LNA Current Window:
99 % (▲ ▼,ENT)
To define the allowable LNA current change before declaring a fault, edit the LNA
Current Window setting as follows:
• Use the ▲ ▼ arrow keys to select a value – the value scrolls from 20% to 50%.
• Select 99% to disable the LNA Current Window function.
• Press ENTER when done.
(ODU SELECT) ODU CONFIG: MISC Æ LNA Æ Cal (Calibrate)
Calibrate LNA Current?
Cal Exit (◄ ►,ENT)
To calibrate the LNA current for use with the LNA Current-Window function
(described previously). Use the ◄ ► arrow keys to select Cal or Exit, and then press
ENTER.
(ODU SELECT) ODU CONFIG: MISC Æ LNA Æ Fault-Logic
LNA: State Curr-Window
Cal Fault-Logic (◄ ►,ENT)
Use the ◄ ► arrow keys to select State, Curr-Window, Cal, or Fault-Logic, and
then press ENTER.
(ODU SELECT) ODU CONFIG: MISC Æ XRef (External Reference)
ExternalRef Fault Logic:
Summary No-Summary (◄ ►)
Use the ◄ ► arrow keys to select Summary or No-Summary, and then press ENTER.
The CSAT will automatically lock to an external 5 or 10 MHz reference
independent of the state of this selection. This selection determines
whether or not the Summary Fault Relay is activated if the CSAT loses
lock with the external reference.
(ODU SELECT) ODU CONFIG: MISC Æ Ref-Adjust
Internal Ref Adjustment:
087 (▲ ▼,ENT)
To edit the Internal 10MHz Reference setting: Use the ▲ ▼ arrow keys to select a value
– the value will scroll from 000 to 255 – and then press ENTER.
The Internal Reference is adjusted in the factory to be very accurate
with the default setting of 087. This parameter is made available to
compensate for the long-term frequency drift of the oscillator
.