Comtech EF Data LBC-4000 - Manual (Page 68)

LBC-4000 L-Band Up/Down Converter System with Ethernet Revision 2
Front Panel Operation MN-LBC4000A
5–12
5.2.1.4 CONFIG: REFADJ (Reference Oscillator Adjustment)
Reference frequency
Adjustment = 087
The reference oscillator adjustment may be manipulated with this menu. Use the [←][→] arrow
keys to select a digit to edit, and then the [↑][↓] arrow keys to change its value. Press [ENT]
when done.
The default Reference Frequency tuning adjustment is 087, with allowable values from 0 to 255.
When an external reference oscillator is connected and set to 10 MHz the following screen
appears:
EXTERNAL 10 MHZ
REFERENCE PRESENT
When an external reference oscillator is connected and set to 5 MHz the following screen
appears:
EXTERNAL 5 MHZ
REFERENCE PRESENT
When an external reference oscillator is connected and set to other than 5 MHz or 10 MHz the
following screen appears:
EXTERNAL REFERENCE FREQ
MUST BE 5/10 MHz
5.2.1.5 CONFIG: SPECT-INV (Spectrum Inversion)
Spectrum Inversion:
ConvA=NRM ConvB=INV
To set Spectrum Inversion operation: Use the [←][→] arrow keys to select ConvA or ConvB, and
then use the [↑][↓] arrow keys to toggle the parameter as NRM (Normal) or INV (Invert). Press
[ENT] when done.