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

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• Field INIT: Initialization Display
This field only displays when the equipment is turned on from mains power and the field is not used
in other navigation. The display is very brief, typically less than 4 seconds, before advancing to the
next field after. The first line of the display illuminates in a r pixel test, and then changing to the
word INITIALIZING, with the model and software release displayed in the second line. The first line
will then change and display an internal option(s) if present.
STEREO ENCODER: YES
Gtx15/2b – rev 1.59
In this example, the transmitter shows the presence (YES) or (NO) of the internal Stereo Encoder
option, before advancing to Operation Field #2.
• Field #00: Escape / Default Display
BE – MARTI Gtx
Gtx15/2b - rev.1.59
This is the default field that shows the equipment model, the software release and the manufacturer's
name. This is the field the display returns back to when an “Escape” is keyed in.
Choosing between the Operation and Setup branch is immediately proposed after the default field is
displayed. At any time, during navigation of the various fields, "escaping" will return back to the
default field. However, after entering a field to change a parameter, then an escape puts you back to
the last navigated field.
• Field #01: Operation / Setup Selection
As the title states, this field allows the Operation or Setup menu branches to be selected by pressing
the one that is highlighted. . Turn the knob to highlight and select which menu branch is desired to
enter. It is not possible to pass from the Operation branch directly to the Setup without passing
through this field
SETUP
OPERATION
• Field #20: Enter Password
ENTER PASSWORD
xxxx
This field will not be displayed if both Level 1 and Level 2 passwords are not enabled.
When passwords are enabled, the field will display when or where required and will display the
Level needed for password recognition to allow further navigation or data entry. If the password is
incorrect or the input is terminated by an "escape", the password states as invalid.