Comtech EF Data DMDVR20 LBST Rev 1.1 - Manual (Page 52)

DMDVR20 LBST Satellite Modem User Interfaces
TM136 – Rev. 1.1 4-15
REF FREQ SRC {EXTERNAL, HIGH STABILITY}
Allows the user to select the Frequency Reference
Source. High Stability is only displayed if the appropriate
hardware is detected.
REF
FREQ (MHz) Allows the user to select the reference clock frequency
in MHz.
BB RELAYS {IBS ALMS, IBS/MNR/ALMS, IBS/MNR/MJR ALM}
IBS ALARMS: Allows the user to select rear panel
contact closures to support IBS alarms only.
IBS/MINOR ALARMS: Allows the user to select rear
panel contact closures to support IBS and Minor alarms.
IBS/MINOR/MAJOR ALARMS: Allows the user to
select rear panel contact closures to support IBS, Minor
and Major alarms.
4.3.5 Monitor Menu Options and Parameters
EVENTS
Displays a history of events recorded in the event buffer.
A maximum of 100 events may be stored in the buffer.
Upon receipt of the 101
st event, the first received event
is automatically deleted, and so on, maintaining the
maximum 100 events.
ERASE EVENTS.. PRESS CLEAR
Allows the user to clear the contents of the Event Buffer
by pressing on the keypad.
INPUT LVL (dBm)
Displays the estimated receive signal level as seen by
the Demodulator.
FREQ OFFSET
Displays the received carrier frequency offset as
measured by the modem.
EBNO (dB)
Displays the estimated E
b
/N
o
as seen by the
demodulator.
PKT ERROR RATE
{0.00E-00} NEEDS INFO
This screen displays the ratio of mpeg packets with CRC
errors to mpeg packets with no errors. No CRC errors =
0, every packet with a CRC error = 1.
VOLTAGES (menu)
+1.5V RX SUPPLY Displays the measured voltage of the 1.5 Volt Rx power
bus located inside the modem.
+1.5V TX SUPPLY Displays the measured voltage of the 1.5 Volt Tx power
bus located inside the modem.
+3.3V SUPPLY Displays the measured voltage of the +3.3 Volt power
bus located inside the modem.