Comtech EF Data SNM-1010L - Manual (Page 58)

SNM-1010L Data/Control Modem Revision 0
Front Panel Operation MN/SNM1010L.OM
CARRIER MODE
NORMAL-MODULATED
Displays the carrier mode of operation as follows:
Normal-Modulated This setting used for normal operation.
Center-CW Generates a carrier at the current modulator frequency. This can be
used to measure the output frequency.
Offset-CW Generates a single, upper, side-band-suppressed carrier signal.
The upper side-band is at one-quarter of the symbol rate from the
carrier. When inverted spectrum is selected, this generates a
single, lower, side-band-suppressed carrier.
Dual-CW Generates a dual side-band suppressed carrier signal. Side-bands
are at one-half of the symbol rate from the carrier. This is used to
check the channel balance and carrier null.
Upon entry, the current carrier mode is displayed with the flashing cursor on the first
character. Press [
↑ ] or [↓ ] to change the carrier mode. Press to execute the
change.
3.4.1.1.8 CONFIGURATION:MODULATOR:MODEM REFERENCE
MODEM REFERENCE
INTERNAL
Displays the following references to the modulator:
• INTERNAL
• EXT1, EXT5, EXT10 and EXT20 MHz external reference (CP3)
• EXT10 MHz Output
Note: If any external reference is selected for the modem reference and then is no input
to CP3, the modem will detect an alarm and switch to the INTERNAL clock.
Upon entry, the current modem reference is displayed with the flashing cursor on the first
character. Press [
↑ ] or [↓ ] change the modem reference. Press to execute the
change.
3.4.1.1.9 CONFIGURATION:MODULATOR:FSK OUTPUT
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