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CDM-Qx Satellite Modem
Front Panel Operation
(Config%Tx%Clk) – TX CLOCKING MODE
Tx Clocking Mode: Int
Loop-Timed ExtLoop (◄ ►,ENT)
Select Int (Internal), Ext (External) or Loop-Timed using the ◄ ► arrow keys, then
press
ENTER
Internal
External
Loop-Timed
ExtLoop
(Config%Tx%Inv) – TX INVERSION FUNCTIONS
Tx Inversion functions:
Spectrum Data Clock (◄ ►,ENT)
Select Spectrum or Data Clock using the ◄ ► arrow keys, then press
Selecting Spectrum displays the following submenu:
Tx Spectral Inversion:
Normal Inverted
Select Normal or Inverted using the ◄ ► arrow keys, then press
Selecting Data Clock displays the following submenu:
Tx Data Sense:
Normal Inverted
Select Normal or Inverted using the ◄ ► arrow keys, then press
Selecting Clock displays the following submenu:
Tx Clock Inversion:
Normal Inverted
.
Indicates that the CDM-QX will supply a clock to the DTE, which is derived from
its internal high-stability source.
Indicates that the CDM-QX expects to receive a clock from the DTE, to which the
unit can phase-lock its internal circuits. (If G.703 is selected as the Interface type,
the software will force the clock mode to External.)
Indicates that the transmit timing source should be the receive clock, from the
direction of the satellite. This is a useful mode, in that no external connection
needs to be made in this mode. If the demodulator loses lock, or if there is no
receive signal present, the internal clock is substituted. Note also that this mode
will work even with asymmetric Rx and Tx data rates.
Indicates that the CDM-Qx expects to receive a clock from the DTE, which is
derived from the received clock from the direction of the satellite. This is useful in
CnC mode with G.703 interface wherein the remote station is relying on a
centralized clock from the hub station.
(◄ ►, ENT)
(◄ ►, ENT)
(◄ ►, ENT)
5–20
Ext
Revision 6
MN/CDMQx.IOM
.
ENTER
.
ENTER
.
ENTER
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