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 #07: RDS / SCA Auxiliary Modulation Level
AUX 2.0kHz -31.2dB
#########O |
This field shows the actual modulation for an auxiliary SCA or RDS signal in dB referenced to 7.5kHz
or 10% of max peak modulation. The usual level for SCA signal is 0dB (7.5kHz) while standard RDS
modulation needs to be set at -11.5dB (2kHz)
• Field #09: Internal Voltages
Vs2 Vs+ Vs-
+27.5V +12.5 -12.4
This field shows the internal regulated power supply voltages. The Vs+ and Vs- voltages on the GTX
& GRX models will typically operate +12.5 ±0.3V and -12.4V (+1/-2V).
The Vs2 battery voltage usually reads Vbat= +27.4 ± 0.4V, when the battery is completely charged
and AC mains are on. In case of battery operation, the equipment works satisfactory at any level the
range of 22 to 28V.
• Field #10: Temperature, Data and Clock
T(A/H) +30°C n.a.
01 Jan 21 23:51:35
This field shows the equipment’s internal temperature in Celsius (°C). The ambient temperature
sensor is placed just behind the front panel and it may read higher than the ambient temperature. At
full output power and the maximum allowed ambient temperature of +45 °C, the internal
temperature could read up to 5 - 6 °C higher. The field software supports heatsink temperature
reading (Th) which is not measured on this equipment. There is no Temperature management, only
an alarm. Therefore the user is advised not to exceed temperature limits.
Bear in mind that the higher the ambient temperature, the lower the MTBF. As rule of thumb the life
is halved each 10 °C the temperature is increased. Assuming 10 year operating life at +25°C, which is
not unrealistic, it may become 2.5 years at +45°C.