Specifications
Table Of Contents
- Title Page
- Table of Contents
- List of Figures
- List of Tables
- 1 Introduction
- 2 Installation
- 3 Navigating the LCD Display Screens
- 3.1 Basic Operating Procedure
- 3.2 Starting Point: The Main LCD Touch Screen
- 3.3 LCD Display Flow Chart
- 3.4 Details of the Exciter Status Screens
- 3.4.1 System Status Screen
- 3.4.2 Transport Stream Status Screen
- 3.4.3 Adaptive Processing Board Status Screen
- 3.4.4 Digital Processing Screens
- 3.4.4.1 Modulator Board Status, Screen 1/2
- 3.4.4.2 ADC and DAC Boards Status, Screen 2/2
- 3.4.4.3 FLO FPGA Status, Summary, Screen 1/5
- 3.4.4.4 FLO FPGA, GPS & Clock Status, Screen 2/5
- 3.4.4.5 FLO FPGA, Transport Stream Status, Screen 3/5
- 3.4.4.6 FLO FPGA, SFN FIFO Status, Screen 4/5
- 3.4.4.7 FLO FPGA, MTI Status, Screen 5/5
- 3.4.5 IF & RF Processing Status Screens
- 3.4.6 System Control Status Screens
- 3.5 Built In Tests
- 3.6 Details of the System Setup Screens
- 3.7 RTAC Operating Procedures, Main Screen.
- 4 Theory of Operation
- 5 Maintenance and Troubleshooting
- 5.1 Exciter Maintenance
- 5.2 Loading Software
- 5.3 Default Settings For DIagnostics Screens
- 5.4 Typical Settings for the More Critical Exciter Setups
- 5.5 Exciter Troubleshooting Flow Charts
- 5.6 General Troubleshooting
- 5.7 System Troubleshooting
- 5.8 Exciter Troubleshooting
- 6 Parts List
- Appendix A Exciter GUI Screen Captures

APEX™ Exciter Incorporating FLO™ Technology
Introduction Specifications
Page: 1-6 888-2604-001 03/08/07
WARNING: Disconnect primary power prior to servicing.
Table 1-3 Harris APEX Exciter Performance Specifications
Specification Explanation
Maximum power output 1 watt peak, 250 mW average
Power output range Programable 1 to 250 mW average
Regulation of output power 1% or less
Frequency stability 1 x 10
-8
per 24 hours with no external reference
1 x 10
-9
for SFN (single frequency network) with external reference
Response variation < 0.2 dB, with the exciter in loopback mode
Group delay < 2 nsec, with the exciter in loopback mode
Phase noise 10 Hz -50 dBm
100 Hz -80 dBm
1 kHz -90 dBm
10 kHz -95 dBm
100 kHz -110 dBm
1 MHz -120 dBm
Spurious output
1
In band -68 dB (-45 dB as measured in 30 kHz RBW)
Adjacent channels -68 dB (-45 dB as measured in 30 kHz RBW)
Signal to noise ratio 36 dB typical, with the exciter in loopback mode
Note 1. Signals referenced to center of channel, at rated output, measured with 30 kHz RBW.