Broadcast Electronics 4100 North 24th Street, Quincy, Illinois 62305 USA • Phone (217) 224-9600 • Fax (217) 224-9607 • www.bdcast.com • bdcast@bdcast.
STXe – 60 Watt FM Exciter Operation Manual ©2013 Broadcast Electronics all rights reserved. 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.
i Broadcast Electronics Product Warranty (Two-Year Limited) BE hereby warrants all new products manufactured by BE against any defects in material or workmanship at the time of delivery thereof, or that develop under normal use within a period of two (2) years from the date of shipment. BE reserves the right to repair equipment under warranty with new or refurbished equipment or parts.
ii this warranty. If the equipment is described as “used” equipment, it is sold as is and where is and no warranty applies unless authorized in writing. .
iii IMPORTANT INFORMATION EQUIPMENT LOST OR DAMAGED IN TRANSIT When delivering the equipment to you, the truck driver or carriers’ agent will present a receipt for your signature. Do not sign it until you have: 1) Inspected the containers for visible signs of damage and 2) Counted the containers and compared with the amount shown on the shipping papers. If a shortage or evidence of damage is noted, insist that notation to that effect be made on the shipping papers before you sign them.
iv RETURN, REPAIR, AND EXCHANGES Do not return 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 credit. Please furnish complete details as to circumstances and reasons when requesting return of merchandise. All returned merchandise must be sent freight prepaid and properly insured by the customer.
v SAFETY PRECAUTIONS PLEASE READ AND OBSERVE ALL SAFETY PRECAUTIONS ALL PERSONS WHO WORK WITH OR ARE EXPOSED TO POWER TUBES, POWER TRANSISTORS, OR EQUIPMENT WHICH UTILIZES SUCH DEVICES MUST TAKE PRECAUTIONS TO PROTECT THEMSELVES AGAINST POSSIBLE SERIOUS BODILY INJURY. EXERCISE EXTREME CARE AROUND SUCH PRODUCTS. UNINFORMED OR CARELESS OPERATION OF THESE DEVICES CAN RESULT IN POOR PERFORMANCE, DAMAGE TO THE DEVICE OR PROPERTY, SERIOUS BODILY INJURY, AND POSSIBLY DEATH.
vi HIGH VOLTAGE Many power circuits operate at voltages high enough to kill through electrocution. Personnel should always break the primary AC Power when accessing the inside of the transmitter. RADIO FREQUENCY RADIATION Exposure of personnel to RF radiation should be minimized, personnel should not be permitted in the vicinity of open energized RF generating circuits, or RF transmission systems (waveguides, cables, connectors, etc.), or energized antennas.
vii Table of Contents 1 2 3 4 5 6 7 Overview.............................................................................................................................. 1 Front Panel Features ............................................................................................................ 2 2.1 FAILSAFE ............................................................................................................................. 2 2.2 AUDIO ....................................................
viii Figures Figure 1 – Main Assembly Front Panel ........................................................................................... 2 Figure 2 – Transmitter Control Center ........................................................................................... 4 Figure 3 – Transmitter Control Center Menus Sheet 1 ................................................................... 7 Figure 4 – Transmitter Control Center Manus Sheet 2 .............................................................
1 1 Overview The STXe FM exciter series is designed to provide a cost effective solution for FM broadcast. Every STXe exciter is tested at the factory for quality and reliability. Technicians will use settings given to sales representatives at the time of purchase. In the absence of this information, the following default settings are used: • • • • • • • • • • • • • • • • • Frequency – 98.5 MHz Operating Mode – FM Only Total Output Power – Set to model name (1 kW Model - 1000 W, etc.
2 2 Front Panel Features The main assembly front panel contains LED indicators for the system controller, internal exciter, internal power amplifier, and an LCD user interface. 2 3 5 1 4 6 7 8 Figure 1 – Main Assembly Front Panel 2.1 FAILSAFE The failsafe LED is coupled directly to the failsafe input on the back panel. Green indicates the failsafe is connected for normal operation. If red the failsafe is not connected and RF power will not turn on. 2.
3 2.4 CNTL The system control LED shows the status of the system controller. Green indicates normal control operation. Red indicates a loss of communication between the front panel and the system controller. 2.5 PA The power amplifier LED shows status of the internal PA. Green indicates normal power control. Orange indicates an alarm condition. Red indicates a fault and PA shutdown condition. Check PA diagnostics for details on what alarms or faults may be active. 2.
4 3 Transmitter Control Center Initial system setup after installation requires interfacing with the LCD display and buttons on the front of the main assembly. Once initial setup is complete, almost all configurations accessible on this control center can be modified remotely via Ethernet interfaces. 1 2 3 4 5 6 Figure 2 – Transmitter Control Center 3.1 Contrast Control A potentiometer tuning tool can be used to adjust the contrast on the LCD screen if desired.
5 3.5 Down Button The context dependent down button performs various functions. When navigating between screens through the trunk it selects a new submenu tree (in the opposite direction as the up button). After entering a submenu screen it either selects different branches or cycles through options. When an editing screen is entered this button modifies the object located at the cursor. 3.6 Return Button The context dependent down button performs two primary functions.
6 ©2013 Broadcast Electronics
7 Figure 3 – Transmitter Control Center Menus Sheet 1 ©2013 Broadcast Electronics
Figure 4 – Transmitter Control Center Manus Sheet 2 ©2013 Broadcast Electronics
11 4 Web Page The STXe comes standard with a built in HTTP web server. To load the web page, simply direct a standard web browser to the IP assigned to the Ethernet port on the system. Figure 5 – Web Interface Main Page The basic settings and monitoring fields in the system are shown above in Figure 5 – Web Interface. To cycle through the active user selection click the “Current User” link in the upper left.
12 Figure 7 – Web Interface PA Page Figure 8 – Web Interface Events Page To check the current web page version, simply point a web browser to [IP Address]/rev.
13 5 SNMP Simple Network Management Protocol is a member of the Internet Protocol standard communications suite. The STXe comes with a built-in SNMP agent (SNMP version 2c) for handling all request types included in the protocol – GET, SET, GETNEXT, and GETBULK. The appropriate MIB for the version of SNMP agent installed on the exciter must be downloaded from the exciter itself. As with any MIB, this ASCII text file completely defines the data structure within the agent.
14 5.2 Objects The SNMP interface utilizes tables wherever it makes sense to communicate data in an indexed fashion. To accommodate a scalable transmitter product design almost all PA data is structured as tables by using the PA number as the index. This works by appending “.1” to the object indicating the single 60W Pa in the system. Note that a normal “leaf” node is accessed by appending “.0” as in …38118.2.2.2.0 for system forward power.
15 Object ID inputSelect peakModulationDeviation preemphasis monoStereoMode modulationPeakHold stereoGeneratorPeakHold compositeAdjust compositeDB compositePeakHold analogLAdjust analogLDB analogLPeakHold analogRAdjust analogRDB analogRPeakHold sca1OnOff sca1Adjust sca1DB sca2OnOff sca2Adjust sca2DB rdsOnOff rdsAdjust rdsDB analogLRLevel aesLevel pilotOnOff pilotLevel clock10MhzStatus clock10MhzLock clock1PPS afcLock afcUnlock modulationSilence audioInputSilence audioSilenceThreshold audioSilencePeriod exc
16 Object ID paFaultStatus paFaultPowerSupply paFaultReflectedPower paFaultVSWR paFaultTemperature paFaultCurrentDriver paFaultCurrentIPA paFaultCurrentFinal1 paFaultCurrentFinal2 paFaultCurrentFinal3 paFaultCurrentFinal4 paFaultHardware paFaultCommunication paTemperature paPsVoltage paDriveCurrent paIPACurrent paFinal1Current paFinal2Current paFinal3Current paFinal4Current paTotalCurrent combinerForwardPower combinerReflectedPower splitterRFInputPower splitterConfigID splitterBoardRev splitterAlarmInputMu
17 Object ID systemFaultOutput vswrSystemOutput transmitterOnOutput transmitterOffOutput muteOutput afcLockOutput paPsFaultOutput paFaultOutput paForwardPowerOutput paReflectedPowerOutput systemForwardPowerOutput paVoltageOutput controllerSoftware controllerHardware splitterCombinerSoftware splitterCombinerHardware paSoftware paHardware frontPanelSoftware frontPanelHardware systemFaultReset failsafeStatus mute systemAlarm systemFault exciterAlarm exciterFault paAlarm paFault paPsFault splitterCombinerAlarm
18 6 Backup Control Modes STXe systems come equipped with two backup control methods. Emergency control mode is integrated standard with all systems and simply allows the system to continue functioning in the event of a system controller failure. The backup system control and exciter feature utilizes an entire STXe system to also allow for full control interfacing with an identical standby exciter. 6.
19 7 Troubleshooting Some basic information and troubleshooting steps are included below. If problems persist after basic troubleshooting steps are taken, please contact RF Technical Services. Contact information is located on our website at www.bdcast.com and on page iii in the front of this manual. A fault in any part of the system indicates a complete disruption in normal operation of at least one part of the system.
20 7.4 Mute A mute refers to a lack of an RF source in some part of the system, and the affected part depends on the context of the notification. Mute indications can happen at various stages for different reasons, and details in system sections below should be considered. Transmitter mute conditions typically refer to the FM exciter.
21 Fault/Alarm Foldback Alarm Temperature Foldback Alarm Current Foldback Alarm Muted Input Alarm Railed Alarm Description power when reflected power approaches dangerous levels. This keeps the transmitter running at reduced power in order to prevent a reflected power fault. During FM only operation, the PA attempts to lower its 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.
22 ©2013 Broadcast Electronics
23 KEY CONTROL COMMUNICATIONS AUDIO CHANNEL(S) RF PATH AC OR DC POWER PROGRAM SERVICE SOURCE(S) STXe60 ASSEMBLY PA CONTROL POWER REGULATOR SYSTEM CONTROLLER/ EXCITER CONTROL INTERFACES FAN POWER SUPPLY AC POWER SOURCE MAIN POWER SUPPLY RF POWER AMPLIFIER ANTENNA/ TRANSMITTER Figure 10 – STXe60 System Block Diagram ©2013 Broadcast Electronics
