APEX
™
Exciter Incorporating FLO
™
Technology
Installation
Configuring the Exciter
Page: 2-8
888-2604-001
03/08/07
WARNING: Disconnect primary power prior to servicing.
The frequency offset box will be greyed out (and unattainable) if the diagnostic setup
feature is locked. Instructions to lock or unlock the diagnostics setup is found in Sec-
tion 3.6.8.2, Diagnostics Setup (Locked or Unlocked), on page 3-54.
• Select the transmitter type.
• Select the type and length (in feet) of waveguide, if waveguide is used in the system
and group delay precorrection for the waveguide run is desired. The waveguide selec-
tions are listed below.
• WR1800, rectangular, for channels 14 through 35
• WR1500, rectangular, for channels 20 through 56
• WR1150, rectangular, for channels 46 through 69
• GLW1750, circular, for channels 14 through 19 and 24 through 41
• GLW1700, circular, for channels 20 through 23
• GLW1500, circular, for channels 39 through 55.
• GLW1350, circular, for channels 56 through 69.
If the exciter is being bench tested, the waveguide selection can be set to None, to pre-
vent group delay pre distortion of the RF output signal.
• Check the exciter RF output power calibration if an accurate milliwatt meter is avail-
able, the exciter display reads average power. If necessary, perform a calibration.
Power calibration is covered in Section 3.6.2.1 on page 3-38.
Main Screen > Setup > RTAC Setup.
• Can be used to avoid nuisance overdrive trips.
• Is used to determine RTAC startup mode when the exciter (or transmitter) is off line.
Main Screen > Setup > Display Setup.
• Enter the Date and Time.
• Enter a new page title, if something other then APEX Exciter is desired.
• Chart selection allows the operator to view the Main screen response display at vari-
ous points along the transmitter system.
• LCD Contrast allows operator to change contrast of the LCD display. Higher num-
bers produce greater contrast, lower numbers produce less contrast.
Main Screen > Setup > External I/O Setup.
This screen is used to set up the control/status jack on the rear of the exciter. This con-
nector contains the provisions for external control and monitoring of the exciter.
When custom is selected in the transmitter selection section of the exciter setup
screen, the channel functions (status and control) can be programmed.
• VSWR foldback low and high thresholds are programmable, see Section 3.6.5.1,
VSWR Foldback Parameters, on page 3-43.
• Exciter switching threshold is determined by the power level of the on line exciter,
see Section 3.6.5.2, RF Present Cutoff, on page 3-43.
Main Screen > Setup > Serial I/O Setup.
This screen is used to set up the front and rear panel RS-232 ports and the Ethernet
port, marked LAN 10Base-T on the exciter rear panel.
Main Screen > Setup > Change Password (or Security) Setup.
