Maintenance Manual
Table Of Contents
- 1 OVERVIEW Marti GTX / GRX
- 2 TECHNICAL SPECIFICATIOINS
- 3 INSTALLATION
- 4 SET UP
- 4.1 Password Organization
- 4.2 Factory Default Passwords
- 4.3 Display Menus and Navigation
- 4.3.1 START & DEFAULT FIELDS
- 4.3.2 TRANSMITTER FIELDS & MENU TREE
- OPERATION MENUS
- Field #02: Direct & Reflected Power
- Field #04: Multiplex Signal Level (Output Modulation)
- Field #05: Left & Right Signal Level in dB
- Field #06: L & R Signal Level / Analog Meter
- Field #07: RDS / SCA Auxiliary Modulation Level
- Field #09: Internal Voltages
- Field #10: Temperature, Data and Clock
- SETUP MENUS
- Field #21: Local/Remote control setup
- Field #22: Transmission Frequency setup
- Field #23: Output Power setup
- Field #24: LF Modulation Input Level setup
- Field #25: Auxiliary Input Level setup
- Field #26: Limiter setup
- Field #27: Transmission Mode, and Pre-emphasis Setup
- Field #28: Reference Deviation setup
- Field #29: Display Contrast setup
- Field #30: Time & Date setup
- Field #31: Elapsed Time
- Field #32: Password Management
- Field #33: Alarm Setup and Display
- Field #34: I/O Pin Allocation and Logic Level setup
- Field #35: Synthesis setup
- Field #37: Ethernet & Lan setup
- 4.3.3 RECEIVER FIELDS & MENU TREE
- OPERATION MENUS
- Field #02: Receiver Frequency
- Field #03: Received RF Field and Muting
- Field #04: MPX Modulation and Reception Field
- Field #04Modulation of the Multiplex Signal
- Fields #05 & #06: L and R Decoded Output Levels
- Field #08: Stereo Pilot Frequency level
- SETUP MENUS
- Field #22: Frequency setup
- Field #24: LF Output Level setup
- Field #25: Receiver Muting setup
- Field #26: De-emphasis setup
- Field #28: Optional Boards Detection
- Field #33: Alarm setup and display
- Field #34: I/O pin allocation and logic level setup
- Field #36 Left & Right Level
- Field #37 Headphone Volume
- Field #39 Serial Number
- 5 SERVICE & CHASSIS DIAGRAMS
38
©2021 Broadcast Electronics
In this field, the user may vary the insertion level of the muting circuit and its intervention. Suitable
levels are -70 to -80dBm for stereo signals and -85 to -90dBm for mono signals, depending on the
received signal strength. The muting level is unrelated to the field alarm level which may be set
differently by its own menu (see alarm setup, menu #33)
By setting "ON" or "OFF", the muting circuit may be enabled or disabled either by "mistuning alarm"
or remote control function.
• Field #26: De-emphasis setup
DEEMPHASIS TIME CST
75 μS
DEEMPHASIS ON / OFF
MONO: 0N STEREO: ON
This field sets the de-emphasis time-constant between 0, 25, 50 and 75μs. The de-emphasis function
maybe separately set for the mono and the stereo outputs, if the stereo decoded is present
• Field #28: Optional Boards Detection
OPTIONS:
STEREO DECODER: NO
In these fields, the software detection of optional internal boards are displayed and depending on
option, setups may be made in the equipment. The stereo decoder board is the most common main
option in the receiver; while other boards may be added in the future or are available in other bands.
Depending on the options detected, additional windows will display in the setup branch in sequence
in front of Field #29 “Display Contrast”.