Comtech EF Data DMDVR20 LBST Rev 1.1 - Manual (Page 65)

User Interfaces DMDVR20 LBST Satellite Modem
4-28 TM136 – Rev. 1.1
4.3.8 Test Menu Options and Parameters
TX TEST PATTERN
{NONE, 2047, 2^15-1, 2^23-1}
Allows the user to enable the tests listed above.
RX TEST PATTERN
{NONE, 2047, 2^15-1, 2^23-1}
Allows the user to enable the tests listed above.
PATTERN SYNC
{YES, NO}
Yes indicates that the RX Test Pattern is in sync.
TST PAT ERR CNT
{NO SYNC, nnnn x 10 n }
Displays the number of errors detected by the test
pattern checker.
TST PATT BER
{NO SYNC, nnnn x 10 -n }
Displays the measured BER for the test pattern.
RESTART TST PAT ((ENTER))
Allows the user to restart the test by pressing
on the keypad.
LOOPBACK WITH ETHERNET DATA INTERFACE
Usage of the modems loopback capabilities in conjunction with the Ethernet data
interface can produce undesirable network loops. In order to run any type of data test
with an Ethernet interface you must utilize two modems connected back to back. Simply
using one modem and a loopback will not produce the desired results.
LOOPBACK
{NONE, TERR TX, BASEBAND TX, IFEC TX}
Terrestrial Loopback is performed at the Terrestrial
Interface
NONE: No loopback performed.
TERR TX: Sends Tx Terrestrial Data to Rx data out.
BASEBAND TX: Sends Tx data to the receive input to
the BB Card.
CARRIER TYPE
{NORMAL, CW, DUAL, OFFSET, POS FIR, NEG FIR}
Allows the user to set the type of carrier.
NORMAL: Causes the Modulator to output normal
modulation.
CW: Causes the Modulator to output a pure carrier.
DUAL: Causes a double sideband output.