Comtech EF Data MDX420 SkyWire Manual - Manual (Page 56)

MDX420 SkyWire™ Satellite Network Gateway Terminal Screens
MN-MDX420 Revision 6 6–18
6.2.4.12 Test Diagnostics
Carrier TYPE
{NORMAL, CW, DUAL, OFFSET, POS FIR, NEG FIR, CNT MOD}
Allows the user to set the type of carrier.
NORMAL: Causes the Burst Modulator to output normal modulation.
CW: Causes the Burst Modulator to output a pure carrier.
DUAL: Causes a double sideband output.
OFFSET: Causes a single sideband output.
POS FIR: For manufacturer’s use only.
NEG FIR: For manufacturers use only.
CNT MOD: Transmits a continuously modulated carrier. This mode is used to
verify the proper bandwidth and noise level margin of the carrier within the
satellite transponder. This is may also be used for antenna alignment. The
test mode does not allow any data to be transmitted.
CNT BST: Continuous Burst mode tells the modulator to send a burst at every
time slot regardless of burst slot assignment. This type of operation is very
useful when installing the first site of a share group or for debugging a network
issue. CNT BST will look like an SCPC carrier on a spectrum analyzer
(virtually always on) and it will satisfy any demodulator who is properly
configured to lock to the signal. CNT BST can be used to verify frequency,
Spectral Inversion and Symbol rates are properly set and to verify the uplink
and downlink chain are in good working order.
LOOPBACK {NONE} This is not available in the MDX420
MOD TEST PATTERN {NONE} This is not available in the MDX420
DEMOD1-4 {NONE} This is not available in the MDX420