Comtech EF Data SDM-309B - Manual (Page 41)

Operation SDM-309B Satellite Modem
3–10 MN/U-SDM309B Rev. #
3.1.5 Monitor
When the “MONITOR” level is entered use the right and left arrow keys to select the
desired monitor function. Each monitor function is displayed in real time as long as it is
selected.
Raw_BER - Raw bit error rate.
* Range: <1.0E-4 to >2550E-4
Cor_BER - Corrected bit error rate.
* Range: <1.0E-8 to >1E-3
Eb/N0 - Energy(bit)/noise ratio.
* Range: <3.2 dB to >16.0 dB
Swp_Freq - Sweep Monitor**
*Range: -25,000 Hz to +25,000 Hz
RxSignal - Receive signal level.
* Range: <-60 dBm to >-30 dBm
FIL_STAT - Plesiochronous buffer fill status in percent.
* Range: 1% to 99%
FRM_ERR/2047_ERR - Framing pattern bit error rate. Monitors the currently
selected READ_ERR function.
* Range: <8.0E-4 to >1.4E-3
* When the decoder loses lock no data is available and is so indicated.
** Sweep Frequency only shows up in the “Monitor” menu if the Fast Acquisition
has been turned on in the “Utility” menu.
3.1.6 Faults
The “FAULTS” level is accessible from the ‘sELECT” menu. Faults are similar to
monitor functions as they display the current fault status of the group being displayed.
Use the right and left arrow keys to move between the fault groups: Mod_Flts
(modulator faults), Dmd_Flts (demodulator faults), CEQ_Flts (common equipment
faults), TX_INTF (transmitter interface faults), and RX_INTF (receiver interface faults).
The current faults status is displayed on line two of the display in real time. Faults status
is display as “+” (plus) or “-” (minus) for each parameter monitored, “+” indicates that a
fault exists and “-” indicates that no fault exists. To display labels for individual faults
press the “Enter” key. Use the left and right arrow keys to move the flashing cursor to the
fault you wish to identify. The label for that fault is immediately displayed on line one of
the display. The “Clear” key can be used to exit this level of operation and return to the
previous level. The following lists outline the faults monitored and displayed in each
group.