GatesAir Inc. CZF User Manual

 

  

APEX

™

 Exciter Incorporating FLO

™

 Technology

Navigating the LCD Display Screens

Details of the System Setup Screens

Page: 3-42

888-2604-001

03/08/07

WARNING: Disconnect primary power prior to servicing.

J: The sample of the non linear precorrector output. 

FLO w/RTAC: Digital signal taken at output of adaptive precorrector board.

BIT: Sample of the Built In Test FIFO (for future use).

Exciter: RF signal is taken from J4 sample output of exciter PA and connected to 
J4 sample input on down converter board.

• LCD Contrast: A 100% setting gives a bright but washed out screen that is still read-

able. A 0% setting gives a dark screen of relatively low contrast that is still readable. 
Enter the desired percent on the LCD display numeric key pad. 

Some functions of the APEX digital exciter must be capable of being controlled (operated)
via a parallel remote control system while other functions must be controllable from the
transmitter logic. The External I/O board is the interface between the APEX exciter and the
transmitter control logic. 

The External I/O screen has three programable areas, which are as follows.

• The “Channel Pin I/O Function” represents the parallel interface connections between 

the exciter and the transmitter control logic. They are discussed in Section 3.6.5.3, 
External I/O Interface to Transmitter Control Logic, on page  3-44

• The three VSWR foldback parameters are discussed in Section 3.6.5.1, VSWR Fold-

• RF Present Cutoff is discussed in Section 3.6.5.2, RF Present Cutoff, on page 3-43

ExternalIOSetup.bmp