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
16
©2021 Broadcast Electronics
Modulation Distortion @ 100% dev
@ 1 kHz/
Mono ≤0.10% 0.03% typical.
Stereo, 1ch ≤0.30% 0.20% typical.
@ 30 - 7500 Hz
Mono ≤0.25% 0.12% typical.
Stereo, 1ch ≤0.30% 0.20% typical.
Stereo Crosstalk:
>50 dB 400 - 10000 Hz, typical
>40 dB 100 - 15000 Hz, typical
Input/Output:
Alarm RF/LF disable, Low RF field
Remote Control/Lock
RS232 for Monitoring and Control
Power Input Requirements:
95 / 250 VAC 50/60 Hz
22.0 - 28.0 VDC
Operating Temperature Range:
0 - 35° C recommended.
-10 - 45° C max.
GTX Transmitter Only
Frequency Error: <2,5 ppM
Frequency Drift: <1 ppM/year
RF Output Power: 7W / 15W (215÷960 Mhz)
2W / 5W (1.4÷2.6 Ghz)
Max Ref Pwr Allowed: 1W / 2W
RF Harmonics: <-60 dBc
RF Spurious: <-70 dBc, -80 dBc typ.
RF Output: 50 ohm, N connector
Audio/Input Level: -3.5 ÷ +12.5dBm
@ ± 75kHz deviation
Audio/Input: 10k ohm/600 ohm, bal./unbalanced
Common Mode Rejection: >50 dB, >60dB typ. (20÷15000 Hz)
Audio Input Connectors: Female XLR
Auxiliary Input Level: -12.5 ÷ +3.5dBm @±7.5 kHz dev.
-24 ÷ -8dBm @±2 kHz dev.
Auxiliary Input: 10k ohm / BNC-type
Monitor LF Output: 0 ÷ +10 dBm @ ±75kHz dev.
Pre-emphasis 0/50/75 μs ±2%
S/N, 30 Hz – 20kHz >77 dB, 82 typ. Mono
>74 dB, 77 typ. Stereo