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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TECHNICAL SPECIFICATIOINS
GTX and GRX Overall Data
Frequency Ranges in MHz, specified on order
Model
Standard Freq Range (MHz)
Alternate Range (MHz)
GTX/GRX200
215-270
210-260
GTX/GRX300
300-360
310-370
GTX/GRX400
400-470
N/A
GTX/GRX800
830-854
850-900
GTX/GRX900
940-960
900-940
(Other ranges on request)
Modulation: FM 75kHz peak deviation.
180kF3E mono
256kF3E stereo
Synthesis Step
10kHz (215 – 960 MHz)
25kHz (1.3 – 2.5 GHz)
Composite Output Response:
+0.1/-0.5dB 15 Hz - 67 kHz
<-6 dB @ 100 kHz
<-20 dB @ 125 kHz
Monitor Output Wideband Response:
+0.1/-1.5dB 15 Hz ÷ 100 kHz
-3 dB typ. @ 125 kHz
-6 dB typ. @ 160 kHz
Mono/Stereo Response:
±0.2dB 0 Hz ÷ 15 kHz
S/N Ratio (30÷20000Hz RMS):
>75 dB, 80 typ. Mono
>72 dB, 76 typ. Stereo