Technical Instruction
Table Of Contents
- Nautel Limited
- MODULE EXCHANGE SERVICE
- 6.1 INTRODUCTION
- 6.2 WIRING LISTS NOT PROVIDED
- 6.3 PRINTED WIRING PATTERNS
- 6.4 WIRE COLOURS
- 5.5 WIRING LISTS PROVIDED
- 7.1 INTRODUCTION
- 7.2 COMPONENT VALUES
- 7.3 GRAPHIC SYMBOLS
- 7.4 LOGIC SYMBOLS
- 7.5 REFERENCE DESIGNATIONS
- 7.5.1 Types of Inputs/Outputs
- 7.5.2 Logic Level/Convention
- 7.7 IDENTIFICATION OF SCHEMATIC DIAGRAMS
VSHD Exciter Technical Instruction Manual Page 3-19
Section 3 Operation Issue 2.0
3.1.4 Configuring RF Drive Source
The front panel UI’s RF Drive Source screen selection options increase when using the
VSHD exciter (see Figure 3-18 compared to Figure 2-101 of the VS transmitter’s Operations
and Maintenance Manual).
Figure 3-18: RF Drive Source Screen
Use the up and down buttons to toggle between Internal VS Exciter, VS HD Exciter and
External FM Exciter. Press the ‘accept’ (checkmark) button to save the change. Press
cancel (X) to discard changes and return to the previous menu.
NOTE
If you select VS HD Exciter, make sure the associated VS transmitter has been physically
modified to operate with the VSHD exciter [see Section 2.2.2 for details].
3.1.5 Front Panel Indicators
The VSHD’s front panel features two LED indicators – STATUS and POWER (See
Figure 3-19).
STATUS – LED that indicates the state of the VSHD exciter using one of three solid colours
or flashing two colours.
• solid amber – standby
• solid red – a fault exists; RF is inhibited
• solid green – RF on, no faults
• flashing amber/green – RF on, minor fault (e.g., low audio)
• flashing red/green – RF on, major fault (e.g., no HD data, no reverse path)
POWER – LED that indicates the status of ac power applied to the VSHD exciter. The LED is
green when ac power is applied.
Figure 3-19: VSHD Front Panel Indicators