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
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Fields 05 & 06 are only displayed if the optional internal stereo decoder is present. Field 05 displays
the peak levels in the decoded audio signal on the left and right channel, expressed in dB relative to
75kHz deviation. Field 06 shows the same information with the analog bar meters.
• Field #08: Stereo Pilot Frequency level
PILOT TONE LEVEL
DEV. 7.5kHz -20.0dB
Again, this field only displays in presence of the optional stereo decoder board. The modulation for
the 19kHz stereo pilot tone embedded in the multiplex signal, is displayed with excellent precision.
There is no need to mute the modulation or to do any special action to measure it
• SETUP MENUS
• Field #22: Frequency setup
FREQ. 2470.175 MHz
F= -55dBm T=+ 1.2kHz
This field sets the receiver frequency in a similar manner as in the transmitters, ( in two steps on
either side of the decimal point).. The bottom line shows the associated received field and center
tuning.
The frequency changing is in real time, except in a major frequency changes which will lag for a few
second in the bottom line..
• Field #24: LF Output Level setup
LF out lev. + 2.5dBm
Nom. level: + 6.0dBm
The Main LF outputs, either the Multiplex (MPX) and Mono signals are set simultaneous in this field.
The first row displays the actual level in dBm, while in the bottom row displays and sets the nominal
output level referenced to 75kHz deviation. The range is -1.5 to +12dBm
• Field #25: Receiver Muting setup
MUTING SETUP
LEVEL: -75DB / OFF