GatesAir Inc. CZF Manual De Usuario

 

  

APEX

™

 Exciter Incorporating FLO

™

 Technology

Navigating the LCD Display Screens

Starting Point: The Main LCD Touch Screen

Page: 3-2

888-2604-001

03/08/07

WARNING: Disconnect primary power prior to servicing.

MainScreen.bmp

Setup, operation, and trouble shooting of the APEX exciter is accomplished via the LCD
Display Touch Screens. This chapter covers the use and definitions of the screens. 

When power is first applied, a power up screen appears briefly, but the display quickly
changes to the main screen, shown in Figure 3-1. 

The main screen is divided into several areas, these are as follows.

• On-Air Data block shows:

Signal to noise ratio (SNR) is the RTAC memory signal to noise ratio. Signal to noise 
ratio should range from 30 to 45 dB.

Error vector magnitude (EVM) does not apply to the Apex Flo exciter.

Integrated power of the lower sideband (LSB) and upper sideband (USB) over the 
spectrum of the lower and upper adjacent channels with reference to the RF output of 
the high power filter. 

• Exciter output power control and level display.

• RTAC section of the main screen shows the operating status of its correctors, which 

are:

• Lin HPF (RF feedback sample taken after the high power filter) 

• Non-Lin (PA output feedback sample, taken before the high power filter). 

The possible states for each corrector are: 

• Bypass: Turns the selected corrector off

• Default: Selects a pre loaded correction algorithm from the RTAC Filter Set-

up screen. Saving an RTAC correction algorithm to an RTAC filter is cov-
ered in Section 3.6.3 on page 3-38.

• Adapt: Turns the selected corrector on

• Hold: Keeps the last correction value for the selected mode. This is a short 

term option. For long term use select Default.