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Related Manuals for Broadcast Electronics Marti GTX
Summary of Contents for Broadcast Electronics Marti GTX
- Page 1 Broadcast Electronics 4100 North 24 Street, Quincy, Illinois 62305 USA • Phone (217) 224-9600 • Fax (217) 224-9607 • www.bdcast.com • bdcast@bdcast.com Marti GTX / GRX BROADCAST STL USER AND MAINTENANCE MANUAL Revision 1.3 Mar 29, 2021...
- Page 3 The information in this publication is subject to improvement and change without notice. Although every effort is made to ensure the accuracy of the information in this manual, Broadcast Electronics accepts no responsibility for any errors or omissions. Broadcast Electronics reserves the right to modify and improve the design and specifications of the equipment in this manual without notice.
- Page 4 Electronics’ product literature or instruction manual which accompany the equipment. The that tamper seal is broken. Broadcast Electronics shall not be liable for any expense of any nature warranty shall be voided if the product or subassembly is equipped with a tamper seal and whatsoever incurred this warranty.
- Page 5 RF PRODUCT TECHNICAL ASSISTANCE, REPAIR SERVICE, & PARTS Technical assistance is available from Broadcast Electronics by letter, prepaid telephone or E-mail. Do not return any merchandise without first contacting Broadcast Electronics and receiving prior written approval and a Return Authorization.
- Page 6 All returned merchandise must be sent freight prepaid and properly insured by the customer. MODIFICATIONS Broadcast Electronics, reserves the right to modify the design and specifications of the equipment in this manual without notice. Any modifications shall not adversely affect performance of the equipment so modified.
- Page 7 être de 0 dBi ou moins et toutes les personnes doivent conserver une distance de séparation minimale de 47.36 cm pour les expositions générales non contrôlées et les expositions générales contrôlées. ©2021 Broadcast Electronics...
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Page 8: Table Of Contents
• Field #31: Elapsed Time ..........................31 • Field #32: Password Management ......................32 • Field #33: Alarm Setup and Display ......................33 • Field #34: I/O Pin Allocation and Logic Level setup ................. 33 • • ©2021 Broadcast Electronics... - Page 9 Field #39 Serial Number ..........................40 • • Transmitter Drawings ............................42 5.1.1 GTX Mechanical Layout – VHF & UHF Models ....................42 Receiver Drawings ..............................43 5.2.1 GRX Mechanical Layout – VHF & UHF Models ....................43 ©2021 Broadcast Electronics...
- Page 10 Figure 6 - Receiver Menu Tree ............................35 Figure 7 – Transmitter Mechanical - VHF & UHF Models ..................42 Figure 11 – Receiver Layout - VHF & UHF ......................... 43 Tables Table 1 – Battery Life ................................22 ©2021 Broadcast Electronics...
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Page 11: General Description
VHF / UHF & SHF Bands General Description The Marti GTX/GRX series STLs are the result of experience gained by Broadcast Electronics during years of producing FM broadcast equipment, transmitters, STL and stereo encoders. These radio links were specifically designed to comply with the latest international standards and the requirements of advanced broadcasters, meeting tighter specifications than usually required, at an affordable cost. - Page 12 The Marti GTX transmitter and its companion Marti GRX receiver are the core of a high quality, synthesized studio-to-transmitter link (STL), to be used for broadcast repeaters in conjunction with any standard FM or AM transmitter. They’re an evolution of the established Marti GTX/GRX series STL whose main circuitry is still extensively used here with a new controller, user interface and software and more advanced oscillators in a compatible 2RU, 19"...
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Page 13: Transmitter Review
An RF Monitor output connector is located on the front panel for easy test on the field An RF Circulator, aka Isolator, is used on models in the SHF band. The Isolator is not required on the VHF/UHF bands Figure 1 – GTX Transmitter Block Diagram ©2021 Broadcast Electronics... -
Page 14: Figure 2 - Gtx Transmitter Rear Panel
BNC connector for a RDS or SCA signal. 8. An LF modulation output for monitoring, RDS external synchronization or re- broadcasting purpose, BNC-type 9. A RS232 Dsub9 female remote serial control port, inverted wired. 10. A parallel control port, Dsub9 male type ©2021 Broadcast Electronics... -
Page 15: Receiver Review
RF field is too low or absent. As in the Transmitter red LEDs signals improper operation. The first one, "Modulation", is activated by low or absent modulation; the last one is the general "Alarm" LED. Figure 3 – GRX Block Diagram ©2021 Broadcast Electronics... -
Page 16: Figure 3 - Grx Rear Panel
7. The L & R audio channels output sockets on balanced XLR-type connectors only with (Internal Stereo Decoder option). 8. A RS232 Dsub9 female remote serial control port, inverted wired. 9. A parallel control port, D-Sub 9 male type ©2021 Broadcast Electronics... -
Page 17: Gtx And Grx Overall Data
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 ©2021 Broadcast Electronics... -
Page 18: Gtx Transmitter Only
-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 ©2021 Broadcast Electronics... -
Page 19: Grx Receiver Only
30 Hz ÷ 15 kHz ±0.1dB Out of band Mono or Stereo Audio Response: >50 dB @ F≥19 kHz De-emphasis Time Constant: 0/50/75μs ±2% S/N Ratio, (30÷20000 Hz. rms): >72 dB, 76 typ. mono >70 dB, 73 typ. stereo ©2021 Broadcast Electronics... - Page 20 >50 dB (100÷5000 Hz) >45 dB (50÷15000 Power Input: 15 W max @ 90/250Vac Battery Input: ≤0.4A @ 24 Vdc Dimensions, less handles: 19" 2RU, 19.0 x 3.46 x 12.6 in 483 x 88 x 330 mm ©2021 Broadcast Electronics...
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Page 21: Rack Mounting And Cooling
Pin 3, Forward power output. A signal proportional to forward power, aka direct power, with a pseudo square law. Range is 0-5Vdc / 1k impedance. Full power voltage ranges 3,5 to 4 V. ©2021 Broadcast Electronics... -
Page 22: Grx Parallel Remote
Reserved for future upgrades. Battery or DC Supply The Marti GTX/GRX include a low voltage d.c. power supply input with battery management, to permit continuous d.c. power supply or back-up in case of mains failure. This input, whose nominal voltage is 24 V negative grounded, accepts a dc supply which may range 22 - 28 V in absence of mains supply. - Page 23 GTX transmitter is typical for SHF version @ 5W output power or a 900MHz version @ 10W. Higher output power will increase this absorption up to 20-30%, while lowering the output power will reduce the current absorption to roughly the same 20-30%. ©2021 Broadcast Electronics...
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Page 24: Table 1 - Battery Life
Table 1 – Battery Life GTX + Unit of Main Consumption 1.95 0.45 Amps Measure Backup Time with Hour(s) 20A/Hour Battery Backup Time with 20.5 16.5 Hour(s) 40A/Hour Battery Backup Time with 16.5 Hour(s) 100A/Hour Battery ©2021 Broadcast Electronics... -
Page 25: Password Organization
Rotating the jog knob counterclockwise or clockwise will scroll up and down the menu displays or within a field to view the submenus when a field is entered. A quick push or tap on the knob will ©2021 Broadcast Electronics... -
Page 26: 4.3.1 Start & Default Fields
#02 in the Operation menu. When any security level is enabled, the equipment stops access following a default timeout. The functioning of the equipment is not influenced by this state such as RF output and modulation. ©2021 Broadcast Electronics... -
Page 27: Field Init: Initialization Display
When passwords are enabled, the field will display when or where required and will display the Level needed for password recognition to allow further navigation or data entry. If the password is incorrect or the input is terminated by an "escape", the password states as invalid. ©2021 Broadcast Electronics... -
Page 28: 4.3.2 Transmitter Fields & Menu Tree
Operation fields #02 thru #10 are described first, followed by the Setup fields. If a field number is missing or out of sequence, the number is being used in the Receiver Menu Tree to describe a different function in the menu sequence. Figure 5 – Transmitter Menu Tree ©2021 Broadcast Electronics... -
Page 29: Operation Menus
• L########### O | R######### This field shows the actual left and right peak modulation as two moving bars. A vertical line marks 0dB position and the same considerations as in the previous menu are still valid. ©2021 Broadcast Electronics... -
Page 30: Field #07: Rds / Sca Auxiliary Modulation Level
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. ©2021 Broadcast Electronics... -
Page 31: Setup Menus
(Set) and the actual level, (Out). Small variations between Set and Out may be allowed to match the licensed power. Field #24: LF Modulation Input Level setup • MPX 75.0kHz + 0.0dB Nom.input = + 6.0dBm ©2021 Broadcast Electronics... -
Page 32: Field #25: Auxiliary Input Level Setup
It is recommended, not to frequently exceed the limiter threshold with modulation peaks. Repeatedly exceeding the threshold can cause a heavy audible distortion. Conversely, setting the threshold to high above the corresponding deviation level would be no difference with the limiter on or off ©2021 Broadcast Electronics... -
Page 33: Field #27: Transmission Mode, And Pre-Emphasis Setup
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. ©2021 Broadcast Electronics... -
Page 34: Field #32: Password Management
The following error message is generated, and the display remains frozen, preventing further operations until the time-out. Subsequently, it is possible to exit the Screen with “Escape” and then possibly try again. ©2021 Broadcast Electronics... -
Page 35: Field #33: Alarm Setup And Display
The factory default value is the one indicated on the first line. Subsequently, on the same menu it is possible to choose the high or low logic level associated with the alarm. When the equipment is locked to remote control operation, it is not possible to alter any preselection before unlocking this control. ©2021 Broadcast Electronics... -
Page 36: Field #35: Synthesis Setup
Transmitter and Receiver. Ethernet settings, IP, Mask and Gateway may be changed in this field. ETHERNET & LAN SETUP The default settings for Ethernet and LAN are as follows: 192.168.001.247 Mask: 255.255.255.000 Gateway 192.168.001.250 admin Password ******* ©2021 Broadcast Electronics... -
Page 37: 4.3.3 Receiver Fields & Menu Tree
The Receiver Menu is structured similar to the Transmitter Menu. Many of the field details have already been described in the Transmitter section and may not be listed here. Some field numbers may be listed again when additional or separate information is provided. Figure 6 - Receiver Menu Tree ©2021 Broadcast Electronics... -
Page 38: Operation Menus
Fields #05 & #06: L and R Decoded Output Levels • LEFT level - 3.0dB RIGHT level - 4.5dB ©2021 Broadcast Electronics... -
Page 39: Field #08: Stereo Pilot Frequency Level
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 ©2021 Broadcast Electronics... -
Page 40: Field #26: De-Emphasis Setup
Depending on the options detected, additional windows will display in the setup branch in sequence in front of Field #29 “Display Contrast”. ©2021 Broadcast Electronics... -
Page 41: Field #33: Alarm Setup And Display
REMOTE LOCKED PIN 7: ALARM FIELD GOOD PIN 3, 8: FIELD GOOD ALARM The factory default is the first line for each pin. All of these lines may be preset active high or low in the same menu. ©2021 Broadcast Electronics... -
Page 42: Field #36 Left & Right Level
There are 16 steps of 3 dB each for a dynamic range of 45 dB between about 0.5 and j 100mW on a 16 Ohm headphone. Field #39 Serial Number • SERIAL NUMBER __R20–9-515 This field is factory set displays at the end of the Setup Branch. ©2021 Broadcast Electronics... - Page 43 Service and repair is limited to the overall mechanical and module interconnect wiring of the GTX and GRX. The following diagrams are provided for module and sub assembly identification of replacement modules if needed and the units cannot be returned to the factory for service. ©2021 Broadcast Electronics...
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Page 44: Transmitter Drawings
Transmitter Drawings 5.1.1 GTX Mechanical Layout – VHF & UHF Models Figure 7 – Transmitter Mechanical - VHF & UHF Models ©2021 Broadcast Electronics... -
Page 45: Receiver Drawings
Receiver Drawings 5.2.1 GRX Mechanical Layout – VHF & UHF Models Figure 8 – Receiver Layout - VHF & UHF ©2021 Broadcast Electronics...
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