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©2020 Broadcast Electronics

100% peak modulation

The STX & STXe defaults to 100% modulation being +/- 75 kHz. This section only applies if the STX
is being used in an installation where 100% modulation is not +/- 75 kHz.

1.

From the main screen on the transmitter control center on the front panel of the main
assembly, press up or down to navigate to the AUDIO LEVEL menu. Press enter to continue.

< AUDIO LEVEL >

TRANSM ITTER CONTROL CENTER

2.

Press up or down to select DEV, the FM deviation control setting. Press enter to continue.

AUDIO LEVEL

TRANSM ITTER CONTROL CENTER

DEV-> 075kHz

3.

Press left or right to move the cursor between frequency digits. Press up or down on each
digit to increment or decrement the number. This change takes effect immediately in the
system without saving the setting to allow for active tuning.

DEV-> 075kHz

TRANSM ITTER CONTROL CENTER

0.0% ^

4.

Press enter when finished editing to save the deviation control setting.

Power set point

1.

From the main screen on the transmitter control center on the front panel of the main
assembly, press up or down to navigate to the PWR SET menu. Press enter to continue.

< PWR SET= 1000W>

TRANSM ITTER CONTROL CENTER

1000W RFL= 6

2.

Press up or down to select the power set point for the FM operation mode, which should
display as active. Note that digital, FM+digital, and hybrid HD sideband settings require an
optional VPe system. Press enter to continue.

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Содержание STXe Series

Страница 1: ...ctronics 4100 North 24th Street Quincy Illinois 62305 USA Phone 217 224 9600 Fax 217 224 9607 www bdcast com bdcast bdcast com STXe Series 2 3 kW FM Transmitter Technical Manual 597 40633 Revision B A...

Страница 2: ...nsmitted transcribed stored in a retrieval system translated into any other language in any form or by any means electronic or mechanical including photocopying or recording for any purpose without th...

Страница 3: ...y way altered from their new condition d Resale Equipment defined as equipment purchased from another manufacturer or supplier then resold by Broadcast Electronics shall only carry such manufacturer s...

Страница 4: ...ized in writing EXCEPT AS SET FORTH HEREIN AS TO TITLE AND AS SPECIFICALLY REQUIRED BY LAW THERE ARE NO OTHER WARRANTIES OR ANY AFFIRMATIONS OF FACT OR PROMISES BY BROADCAST ELECTRONICS WITH REFERENCE...

Страница 5: ...chnical 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 writte...

Страница 6: ...turn any merchandise without our written approval and Return Authorization We will provide special shipping instructions and a code number that will assure proper handling and prompt issuance of credi...

Страница 7: ...ubes and power transistors involves one or more of the following hazards any one of which in the absence of safe operating practices and precautions could result in serious harm to personnel A HIGH VO...

Страница 8: ...95 1 1982 RF energy must be contained properly by shielding and transmission lines All input and output RF connections such as cables flanges and gaskets must be RF leak proof Never operate a power tu...

Страница 9: ...n 23 Additional Program Services 24 Ethernet IP Network 26 Password 29 Stereo Generation and Stereo Pilot Injection 30 Pre Emphasis 31 Tuning Digital Mode RF Amplifier Linearity 32 Secondary Audio and...

Страница 10: ...udio 71 Logs 71 Other Features VSWR vs Reflected Power 72 Authentication 74 Objects 74 Emergency Control Mode 75 Standby System Control and Exciter 75 Event Log 76 Standby 76 Failsafe 76 Mute 77 Inter...

Страница 11: ...Web Interface Authentication 58 Figure 16 Expanded View on Main Page 58 Figure 17 Web Interface PA Status Page 59 Figure 18 Web Interface Events Page 59 Figure 20 RDS Setup Page 60 Figure 21 Audio De...

Страница 12: ...he following Section Installation and Initial Set Up If you are not currently familiar with the STX Series please refer to the detailed information provided in Sections 4 5 of this manual for addition...

Страница 13: ...ite 15 AES 2dBFS input level 16 AES Stereo injection 100 17 Analog L 2 5 dB input gain 18 Analog R 2 5 dB input gain 19 Analog L R Stereo injection 100 20 Composite 8 0 dB input gain 21 SCA1 o Off o 1...

Страница 14: ...ed in section 4 1 1 GPIO for the pin out information for connection to a sites remote control system All installations require unmute failsafe to be activated at a minimum If this is the only site req...

Страница 15: ...nd Nuts 4 Plug the assembly on the GPIO connection and secure the screws AC Connection ENSURE AC MAIN IS DISCONNECTED AND LOCKED OUT BEFORE INTERACTING WITH ANY AC CONNECTIONS 1 Insert AC wiring into...

Страница 16: ...ight saving 1 From the main screen on the transmitter control center on the front panel of the main assembly press up or down to navigate to the Date and Time menu Press enter to continue 2000 01 01 T...

Страница 17: ...s required when the carrier frequency is changed If the STX RF output is on TX ON when the frequency is changed the system will momentarily turn the RF output off change the frequency and immediately...

Страница 18: ...ve the cursor between frequency digits Press up or down on each digit to increment or decrement the number This change takes effect immediately in the system without saving the setting to allow for ac...

Страница 19: ...and used in any on off combination with these primary audio sources AES The STXe supports standard AES audio as well as 192 kHz Composite over AES The 192 kHz Composite over AES operates with various...

Страница 20: ...creen on the transmitter control center on the front panel of the main assembly press up or down to navigate to the AUDIO LEVEL menu Press enter to continue AUDIO LEVEL TRANSM ITTER CONTROL CENTER 8 P...

Страница 21: ...R TRANSM ITTER CONTROL CENTER 4 Set the stereo injection reduction to allocate injection budget for secondary services Leave this at 100 if there are no secondary services 5 Press left or right to mov...

Страница 22: ...he cursor 10 11 Press up or down on each digit to increment or decrement the number and take effect in the system This has immediate effect Do this until the displayed left channel peak hold is the de...

Страница 23: ...nu Press enter to continue AUDIO INPUT TRANSM ITTER CONTROL CENTER AES 100 0 3 Press up or down to select COMPOSIT as the primary audio source Press enter to continue AUD IN COMPOSIT TRANSM ITTER CONT...

Страница 24: ...Composite input is summed with the supplementary sources SCA1 SCA2 and RDS When calibrating the Composite input the supplementary sources should be turned off 9 COMP 08 00dB TRANSM ITTER CONTROL CENTE...

Страница 25: ...ut Activate the source with a constant level tone or typical level real audio 2 From the main screen on the transmitter control center on the front panel of the main assembly press up or down to navig...

Страница 26: ...ed composite peak hold is within a few percent of 100 9 Note SCA1 SCA2 and RDS input signals that are enabled also contribute to this composite peak hold value These sources should be turned off befor...

Страница 27: ...ither this simple static IP setup or dynamic host control setup 1 From the main screen on the transmitter control center on the front panel of the main assembly press up or down to navigate to the ETH...

Страница 28: ...TTER CONTROL CENTER 010 002 001 001 MAC ADDRESS TRANSM ITTER CONTROL CENTER AABBCCDDEEFF 5 Press left or right to move the cursor to any of the 12 digits Press up or down to increment or decrement the...

Страница 29: ...s up or down to navigate to the ETHERNET IP CONTROLLER Press enter to continue ETHERNET IP TRANSM ITTER CONTROL CENTER CONTROLLER 3 Once in the menus press up or down to select CONTROLLER DHCP and pre...

Страница 30: ...bly press up or down to navigate to the PASSWORD menu Press enter to continue PASSWORD TRANSM ITTER CONTROL CENTER 2 Press up or down to select the password to be set Press enter to continue SET PASSW...

Страница 31: ...CENTER 3 Press enter for the selected mono stereo mode to save and take effect in the system 4 Note that if changing from any mono mode to stereo the internally generated 19 kHz stereo pilot will aut...

Страница 32: ...will only be present if the STXe is in Stereo mode Pre Emphasis Internal pre emphasis filtering on the AES and Analog L R audio inputs is another standard option feature tied to internal stereo gener...

Страница 33: ...the power settings menu on the transmitter control center front panel interface PWR SET 3000W TRANSM ITTER CONTROL CENTER 3000W RFL 16 2 Press down up to one of the PA V screens There is a screen for...

Страница 34: ...o an alternate source after the PRIMARY AUDIO is absent for the time entered in the SILENCE TIMEOUT setting 6 From the main screen on the transmitter control center on the front panel of the main asse...

Страница 35: ...UP TRANSM ITTER CONTROL CENTER SILENCE TIMEOUT 12 Press up or down left or right to enter a timeout in seconds SILENCE 10 TRANSM ITTER CONTROL CENTER 13 Press enter when finished for the time out sett...

Страница 36: ...nators in the figures below refer to sub section numbers in this section For example Box 4 1 of Figure 7 corresponds to details in 4 1 of this section Figure 7 Feature Connector Location REAR 4 16 4 2...

Страница 37: ...t Transmitter On Turns RF power on with an active low edge 4 Input Transmitter Off Turns RF power off with an active low edge 5 Input Mute Mutes RF while the input is held low This essentially perform...

Страница 38: ...output power is on 23 Output Transmitter Off Low when system RF output power is off 24 Output Mute Status Low when the transmitter is muted via input pin 5 25 Output AFC Lock Low when the internal exc...

Страница 39: ...f concurrent users that can be connected to the STX however an excessive number of connections will cause a decrease in performance COM IN System communications bus input This RJ45 jack is intended to...

Страница 40: ...and disabled independently 19kHz OUT 19 kHz stereo pilot output connector This BNC connector is used to output the pilot signal for optional use in external synchronization equipment The output wave f...

Страница 41: ...ndently RF OUT The final power amplifier output This N connector output carries the amplified RF output at the maximum 3kW FM only forward power level to connection to a 50 Ohm antenna RF SAMPLE Power...

Страница 42: ...his section Figure 8 Control and Feature Locations FRONT AUDIO The audio LED indicates the status of the current primary audio source and remains green until a fault is detected If an audio peak is de...

Страница 43: ...ange indicates an alarm condition Red indicates a fault and PA shutdown condition See Table 10 PA Diagnostics Details in section 12 6 for details on what alarms or faults may be active PS The power su...

Страница 44: ...ms two primary functions When navigating between screens it allows a return to the main screen from any other navigation screen When an editing screen is entered this button moves the cursor one space...

Страница 45: ...ifferent branches or cycles through options When an editing screen is entered this button modifies the object located at the cursor Return Button The context dependent down button performs two primary...

Страница 46: ...ting mode setup parameters determines the definition of this interface which is described in following paragraphs Systems come standard equipped to run either of two standard modes of power amplificat...

Страница 47: ...is includes transmitters remote monitoring and control and signal generation options With a provided cable harness the STXe can seamlessly interface with legacy Broadcast Electronics transmitters Usin...

Страница 48: ...47 2020 Broadcast Electronics Figure 10 Transmitter Control Center Menus Sheet 1...

Страница 49: ...49 2020 Broadcast Electronics Figure 11 Transmitter Control Center Menus Sheet 2...

Страница 50: ...toring information and other settings click on the link buttons located on the bottom of the Main Page Login Profiles Basic Web Page Posting settings to the exciter and other settings in bold requires...

Страница 51: ...4 You can also click on a text field of the desired change in any of the option windows shown in Figure 25 The Authentication dialog box will pop up as shown inFigure 24 Simply enter the user profile...

Страница 52: ...59 2020 Broadcast Electronics Figure 17 Web Interface PA Status Page Figure 18 Web Interface Events Page To check the current web page version simply point a web browser to IP Address rev htm...

Страница 53: ...static RDS information or FSK ID data such as Translator Identification use the Internal RDS Setup link listed in the bottom of the Basic Web page Figure 28 to access the RDS Setup Page Figure 29 Fig...

Страница 54: ...of the RF signal The audio delay is settable with an integer number steps from 0 to 8128 where each step is on the order of 5 3 micro seconds This correlates to a delay range from 0 to 43 7 milliseco...

Страница 55: ...his page click the GRAPHICAL INTERFACE link at the bottom of the basic web page Figure 21 Link from Basic Web Page to GUI Main Page Refer to Figure 32 While navigating the screen pages buttons with ba...

Страница 56: ...login profile move cursor into the view button and a popup window will display click to change Logged in status as in Figure A The previous screen being displayed will change to that in Figure B Move...

Страница 57: ...cast Electronics Figure 25 Profile Logged Out Navigation The primary screens in the GUI can be accessed by clicking on the text in the Navigation Bar near the top of the page in Figure 36 Figure 26 Na...

Страница 58: ...rdware setup type This is determined during initial setup of the system and might be 1kW 2kW 3kW or 5kW TX transmitter 2 Date and Time Real time clock data configured during setup 3 Login Profile Acti...

Страница 59: ...sured system forward RF power output reading 9 Reflected Power Internally measured system reflected RF power reading 10 Frequency FM carrier frequency setting 11 Modulation Internal frequency modulati...

Страница 60: ...gle PA 1kW systems 3 RF Input Power RF In mW PA RF drive input power reading in mili Watts 4 Driver Current Driver mA Current in milli Amperes for the driver stage RF power amplifier 5 Final Current F...

Страница 61: ...er RF In mW Splitter RF drive input power reading in mili Watts 4 Inlet Temperature Inlet Temp C Front inlet temperature measurement in degrees Celsius 5 Combiner Temperature Combiner Temp C Internal...

Страница 62: ...with changes to the mono stereo setting Can be controlled independently 5 Modulation Frequency deviation amount in kilohertz from nominal carrier frequency This setting represents 100 peak frequency m...

Страница 63: ...nformation for connections on the GPIO connector pins shown in the left columns These connections may be used for machine interfaces with remote station controllers monitors or with other transmission...

Страница 64: ...lows the stereo composite to be scaled down to balance modulation budget without changing gain calibration setup This also scales pilot when in stereo 4 Modulation Peak holds for inputs displayed as e...

Страница 65: ...ory identification in a readable format 6 Parameter Event specific value for logging some changes 7 Full Description Log entry details in a readable format 8 Scroll Click the up and down arrows to scr...

Страница 66: ...73 2020 Broadcast Electronics...

Страница 67: ...to access the interface Integrating a manager into custom station automation programs provides countless possibilities Alternatively various third party MIB browser GUI applications are available for...

Страница 68: ...t at 0 W and is effectively disabled The transmitter will continue to function at full emergency power as long as the exciter maintains drive to all power amplifiers The power amplifier can only enter...

Страница 69: ...from the system s internal real time clock an event identification number and the sub system where the event triggered Some events also have context based parameters that are embedded in the descripti...

Страница 70: ...ller and the internal exciter is nonfunctional AFC Unlock Alarm Automatic frequency control system does not yet have lock 10MHz Status Displays INT when exciter is on the Internal reference or EXT for...

Страница 71: ...output power when the internal heat sink temperature approaches dangerous levels This keeps the transmitter running at reduced power in order to prevent a temperature fault Current Foldback Alarm Dur...

Страница 72: ...snapped washable air filters for each system module Air filter cleaning should be a part of regular system maintenance Main Power Supply 540 0016 007 Power Supply Assembly 53VDC 2kW Phillips Screwdri...

Страница 73: ...ps 1 through Error Reference source not found in section 13 3 Main Add on Fan to provide space for removal of this board Power Amplifier Tasks in this section require removal and replacement of both t...

Страница 74: ...9 4200 100 Gently pull the 1PPS SMB cable and disconnect it Do not yank the cable use a set of pliers for sufficient grip on the cable end if necessary 1 Disconnect all 2 Repeat all of these steps in...

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