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In this field, the user may vary the insertion level of the muting circuit and its intervention. Suitable

levels are -70 to -80dBm for stereo signals and -85 to -90dBm for mono signals, depending on the

received signal strength. The muting level is unrelated to the field alarm level which may be set

differently by its own menu (see alarm setup, menu #33)
By setting "ON" or "OFF", the muting circuit may be enabled or disabled either by "mistuning alarm"

or remote control function.

•

Field #26: De-emphasis setup

DEEMPHASIS TIME CST

75 μS

DEEMPHASIS ON / OFF

MONO: 0N STEREO: ON

This field sets the de-emphasis time-constant between 0, 25, 50 and 75

s. The de-emphasis function

maybe separately set for the mono and the stereo outputs, if the stereo decoded is present

•

Field #28: Optional Boards Detection

OPTIONS:

STEREO DECODER: NO

In these fields, the software detection of optional internal boards are displayed and depending on

option, setups may be made in the equipment. The stereo decoder board is the most common main

option in the receiver; while other boards may be added in the future or are available in other bands.

Depending on the options detected, additional windows will display in the setup branch in sequence

in front of Field #29 “Display Contrast”.

Содержание Marti GRX

Страница 1: ...Electronics 4100 North 24th 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 M...

Страница 2: ......

Страница 3: ...yright Copyright laws protect artwork depicting circuitry in this manual Information in this manual is subject to change without notice and does not represent a commitment on the part of Broadcast Ele...

Страница 4: ...n any way Under no circumstances shall Broadcast Electronics be responsible for indirect incidental or consequential damages including but not limited to transportation costs non authorized repair or...

Страница 5: ...oadcast Electronics and receiving prior written approval and a Return Authorization We will provide special shipping instructions and a code number that will assure proper handling and prompt issuance...

Страница 6: ...power supplies and or batteries used in RF amplifier circuits can supply very high currents B HOT SURFACES Certain areas of the equipment heat sinks and components may be operating well above ambient...

Страница 7: ...es not included in this list having a gain greater than the maximum gain indicated for that type are strictly prohibited for use with this device FRENCH Le pr sent metteur radio 131A GTX900 a t approu...

Страница 8: ...U TREE 26 OPERATION MENUS 27 Field 02 Direct Reflected Power 27 Field 04 Multiplex Signal Level Output Modulation 27 Field 05 Left Right Signal Level in dB 27 Field 06 L R Signal Level Analog Meter 27...

Страница 9: ...ut Levels 36 Field 08 Stereo Pilot Frequency level 37 SETUP MENUS 37 Field 22 Frequency setup 37 Field 24 LF Output Level setup 37 Field 25 Receiver Muting setup 37 Field 26 De emphasis setup 38 Field...

Страница 10: ...gure 2 GTX Transmitter Rear Panel 12 Figure 3 GRX Rear Panel 14 Figure 4 GTX GRX Remote Connectors 19 Figure 5 Transmitter Menu Tree 26 Figure 6 Receiver Menu Tree 35 Figure 7 Transmitter Mechanical V...

Страница 11: ...ers the corresponding antennas cables and connectors This will assure to achieve the best performance and stability in time To this aim Broadcast Electronics especially recommend that their equipment...

Страница 12: ...expense of some frequency agility So nearly 8 10MHz may be used without any retouching but wider variation up to 50 60MHz will require retuning of the input filter Being the apparatuses are completel...

Страница 13: ...various options A single fast push on the jog knob acts as an Enter or confirmation while pushing for a longer time is interpreted as Escape Some LEDs signal at a glance proper functioning and warning...

Страница 14: ...type connectors L input is used only with internal Stereo Encoder option 5 The AES EBU stereo digital audio input on a balanced XLR type connector which may be used as an alternative to the analog inp...

Страница 15: ...ingle output connector for IF monitoring Here too regular operation is signalized by green LEDs PLL Lock and Field This latter is a bi stable and lights in yellow when RF field is too low or absent As...

Страница 16: ...on two BNC type connectors in antiphase permitting direct drive of two separate transmitters or one in balanced mode 5 A buffered LF monitor BNC type connector that maybe internally connected as an ad...

Страница 17: ...RX800 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 Out...

Страница 18: ...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...

Страница 19: ...24 Vdc Po 15W Dimensions less handles 19 2RU 19 0 x 3 46 x 12 6 in 483 x 88 x 330mm GRX Receiver Only Receiver Noise 9 dB Image Frequency Rejection 60 dB 70 typ Dynamic Selectivity 10dB typ F 300 kHz...

Страница 20: ...rtion 1kHz 100 dev Mono 0 1 0 03 typ Stereo 0 3 0 20 typ Stereo Crosstalk 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...

Страница 21: ...ontrol and monitoring functions on this DB9 male connector Many of the I O lines may be assigned to different functions and logic polarity may be changed as needed for the sites remote control equipme...

Страница 22: ...s main LF outputs Maximum voltage and current available are nearly 10V and 1mA Alternate function is Remote lock when chosen a shorted circuit disables front panel setup functions Pin 7 Alarm output O...

Страница 23: ...tion on prolonged mains loss Never permit batteries to undergo below minimum safe voltage on prolonged discharges Following these guidelines battery life expectation may range from 2 to 5 years depend...

Страница 24: ...Battery Life GTX GRX GTX GRX Unit of Measure Main Consumption 1 95 0 45 2 4 Amps Backup Time with 20A Hour Battery 9 44 7 5 Hour s Backup Time with 40A Hour Battery 20 5 44 16 5 Hour s Backup Time wit...

Страница 25: ...to the Setup menus then this Level can be set to ON With the Level 1 password enabled the Enter Password field is activated when navigation to the Setup menu is attempted Failure to insert a correct p...

Страница 26: ...Point in navigation depending on the last status of the GTX or GRX control Timeouts and Default Fields 1 Knob Hold 3 Seconds As stated above holding the knob in for 3 seconds provides an Escape when...

Страница 27: ...hen an Escape is keyed in Choosing between the Operation and Setup branch is immediately proposed after the default field is displayed At any time during navigation of the various fields escaping will...

Страница 28: ...E 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 differen...

Страница 29: ...al bar on this line marks the 0dB position Field 05 Left Right Signal Level in dB LEFT level 3 0dB RIGHT level 3 5dB This field shows the actual left and right peak modulation in dB referenced to 75kH...

Страница 30: ...rks 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 ambien...

Страница 31: ...he following message REMOTELY LOCKED PRESET TO LOCAL Pushing Enter twice in succession on the knob will access the control Screen and the REMOTELY LOCKED line will be selected allowing it to be change...

Страница 32: ...e 10 modulation corresponding to the deviation of 7 5kHz or 20dB in the upper line of the display On this line the actual modulation of the channel is shown in real time On the lower one the nominal v...

Страница 33: ...FERENCE DEVIATION 75 kHz The field selects the deviation to reference 0dB of modulation The standard default is 75kHz but you can choose any value between 5 and 75kHz and specifically 50 40 or 25 kHz...

Страница 34: ...ed and we changed the status from ON to OFF the steps and confirmation display would be the same except for the letters FF to indicate OFF CONFIRM PASSWORD 1 P001 FF With password enabled any attempt...

Страница 35: ...knob is moved to permit navigation in the control and setup menus at timeout i e 2 or 3 minutes from the last access it will superimpose again till alarm resets The alarm reset is automatic and requir...

Страница 36: ...up Field 37 is for the ETHERNET LAN hardware option The control and display software will have this ready for the option in both the Transmitter and Receiver Ethernet settings IP Mask and Gateway may...

Страница 37: ...enu 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 whe...

Страница 38: ...Muting FIELD 58dBm MUTING OFF Here the received signal field in dBm is displayed and whether or not the muting function is active Field 04 MPX Modulation and Reception Field MPX FIELD 52dBm This fiel...

Страница 39: ...r 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 tw...

Страница 40: ...ASIS TIME CST 75 S DEEMPHASIS ON OFF MONO 0N STEREO ON This field sets the de emphasis time constant between 0 25 50 and 75 s The de emphasis function maybe separately set for the mono and the stereo...

Страница 41: ...15 9dB NO MOD TIME 90sec UNLOCK TIME 60sec Field 34 I O pin allocation and logic level setup As described in the proper section there are at least 4 I O lines which may be associated to corresponding...

Страница 42: ...the internal electronic attenuator which has 256 steps Field 37 Headphone Volume HEADPHONE VOLUME 08 Currently Fields 36 and 37 are in the control software only When the advanced stereo decoder card...

Страница 43: ...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...

Страница 44: ...42 2021 Broadcast Electronics Transmitter Drawings 5 1 1 GTX Mechanical Layout VHF UHF Models Figure 7 Transmitter Mechanical VHF UHF Models...

Страница 45: ...43 2021 Broadcast Electronics Receiver Drawings 5 2 1 GRX Mechanical Layout VHF UHF Models Figure 8 Receiver Layout VHF UHF...

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