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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©2021 Broadcast Electronics
• Field #27: Transmission Mode, and Pre-emphasis Setup
MODE/PREEMPH. SETUP
STEREO PR 75 μS
The transmission "modes" (MONO R, STEREO, MONO L+R, EXT MPX), and the pre-emphasis time-
constants (0, 25, 50 or 75 μS) are set up here. The pre-emphasis is only active on audio channels and
not an external multiplex signal.
Set pre-emphasis to the correct standard for your area. Countries in North and South America use 75
μS pre-emphasis, while Europe and some other countries will use 50 μS
• Field #28: Reference Deviation setup
REFERENCE DEVIATION
75 kHz
.The field selects the deviation to reference 0dB of modulation. The standard (default) is 75kHz but
you can choose any value between 5 and 75kHz, and specifically 50, 40 or 25 kHz.
• Field #29: Display Contrast setup
DISPLAY CONTRAST
SETUP 5
It is possible to vary the display contrast. The setting range is 0 to 7 .
• Field #30: Time & Date setup
DATE & CLOCK SETUP
31 JAN 21 12:45:00
This field edits date or time. The clock is configured for 24 hour clock time.
• Field #31: Elapsed Time
ELAPSED TIME
000356 HOURS
This field shows the elapsed time of service whether the transmitter is on the air or in stand-by and
begins counting when AC mains are applied. This is set in the factory and is not a setting that can be
changed.