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HSD Series

Transmitters

HSD-2500

OPERATION AND

MAINTENANCE

GUIDE

Release 1.0

COMMUNICATIONS

Mountain Top, PA, USA

Summary of Contents for HSD Series

Page 1: ...HSD SeriesTM Transmitters HSD 2500 OPERATION AND MAINTENANCE GUIDE Release 1 0 COMMUNICATIONS Mountain Top PA USA...

Page 2: ...11 1 5 Operation 12 1 6 Controls and Indicators 13 1 6 1 Front Panel Controls Pictorial View 14 1 7 List of Interconnecting Diagrams 14 1 8 List of Schematic Diagrams 14 1 9 Warranty and Parts Orderin...

Page 3: ...el Programming 55 5 9 Interpreting Amplifier Fault Indications 56 5 10 Calibrating Voltage Indications 57 6 PARTS LISTS 58 7 SCHEMATIC DIAGRAMS 73 8 OPERATING MANUAL RELEASE NOTES 95 TABLE OF FIGURES...

Page 4: ...rior written consent of EMCEE Communications is strictly prohibited Copyright 2006 EMCEE Communications All rights reserved This copyright notice should not be construed as evidence of publication TAB...

Page 5: ...phase locked systems and infinite tuning by 1 MHz steps across the entire band The transmitter is designed to provide configurable and upgradeable output power requiring only a 6RU rack footprint It f...

Page 6: ...e guidelines to ensure general safety Keep the chassis area clear and dust free during and after installation Keep tools away from walkways where you and others could trip over them Do not wear loose...

Page 7: ...g safety ground wires If an electrical accident occurs proceed as follows o Use caution o Unplug the power cord o If possible send another person to get medical aid Otherwise assess the victim s condi...

Page 8: ...unications All rights reserved This copyright notice should not be construed as evidence of publication harmful interference to radio or television reception which can be determined by turning the equ...

Page 9: ...alog 5M75C3F visual 250KF3E aural Digital 4 256 QAM DVB C or 8 16 VSB ATSC 6M00D7W Monochrome Standards B G D K M N I Color Transmission NTSC PAL or SECAM Frequency Response 1dB from 500kHz to 4 0MHz...

Page 10: ...f publication 2T Pulse K Factor 3 minimum 12 5T Baseline Disturbance 5 maximum Envelope Delay 5ns Output Impedance 50 ohms Female N Type IF Input Impedance 75 ohms unbalanced Female BNC Video Signal t...

Page 11: ...these accessories are present for the installation Description Part Number OEM Vendor Rack Mount Rails C 300 S 124 General Devices Installation Maintenance Guide HSD 2500 Manual EMCEE Operating Manual...

Page 12: ...1 5 Operation Assuming the installation instructions of Section 1 4 have been completed and the transmitter is receiving an IF input from the modulator proceed with the following steps to place the t...

Page 13: ...smission line VSWR to insure maximum radiation 1 6 Controls and Indicators The transmitter up converter section has front panel push push switches for Operate Standby and AGC on off control These swit...

Page 14: ...agram Up Converter Drawer 50500000 Interconnection Diagram S Band Transmitter 1 8 List of Schematic Diagrams NOTE MODULE SCHEMATICS ARE LISTED IN THE FOLLOWING NUMERICAL SEQUENCE 50521002 Schematic Di...

Page 15: ...or fax for a Return Authorization Number 2 Provide Customer Service with the following information o Equipment model and serial numbers o Date of purchase o Unit input and output frequencies o Part n...

Page 16: ...maintenance technician at all times The Schematic and or Interconnection Diagram is the governing document of this manual Should there be a discrepancy between a modules or components list and a diagr...

Page 17: ...ration An additional backplane may be ordered as optional equipment which allows for three more power supplies which will provide additional power supply redundancy Up to six power supply modules may...

Page 18: ...the Power Amplifier module remove the amplifier status power connector Remove the RF input and output connectors There are four retaining screws that install upward though the bottom of the main chas...

Page 19: ...hould not be construed as evidence of publication 2 1 1 INTERNAL VIEW Up Converter Drawer The pictorial view of the Up Converter drawer shows the locations of the 9 modules and circuit boards located...

Page 20: ...VIEW Main Chassis The pictorial view of the rear of the main chassis shows the input and output connections the rear panel controls and cooling fans A circuit breaker switch is located in the up conve...

Page 21: ...is copyright notice should not be construed as evidence of publication METERING DETECTOR MODULE 2 1 3 INTERNAL VIEW Main Chassis The pictorial view of the HSD 2500 main chassis shows the module layout...

Page 22: ...al IF IN J2 5 to 25 dBm average power DIGITAL RF OUT J4 34dBm average power The Up Converter drawer contains a series of modules which as a group up convert the modulator s combined visual and aural I...

Page 23: ...OUT UP CONVERTER DRAWER D1 EXT REF POWER AMP STATUS CONTROL P S STATUS CONTROL 10 MHz REFERENCE MODULE A5 STATUS CONTROL REMOTE CONTROL BOARD PC3 STATUS CONTROL REMOTE STATUS CONTROL 3 2 1st IF Modul...

Page 24: ...owing amplifier U3B The comparator output at J1 pin 4 then drives the outboard status circuitry in the control board indicating an IF lock because the AGC loop is in lock When this output is high at o...

Page 25: ...f the visual signal envelope are sufficient to forward bias the diode pair the pair turns on placing the resistance of its respective slope potentiometer in parallel with the series arm of its L pad R...

Page 26: ...s input feeds the input port of mixer MX1 which mixes the input signal and the local oscillator input to provide a mixed output frequency of 374 MHz regardless of the input IF frequency The output lev...

Page 27: ...its a gain of 13dB and is again biased with 3 2 volts at 45ma The U5 output flows through a low pass filter composed of L5 L6 C45 C46 and C47 to the LO port of mixer MX1 with a power level of 8dBm The...

Page 28: ...s biased in the same way as U1 The U2 output couples to the module output connecter J4 through coupling capacitor C3 and has a nominal output level of 0dBm The local oscillator portion of the module w...

Page 29: ...wn state The data clock and load enable lines pins 42 41 and 40 from U8 provide programming for the PLL IC and they work as follows There are three 24 bit words that are sequentially clocked into the...

Page 30: ...detector provides a DC output which feeds the op amp U1B exhibiting a voltage gain of 2 This then feeds U1A and its supporting circuitry which acts as a comparator The comparator circuit compares a re...

Page 31: ...s and J2 connects to the second four amplifier modules if so installed The logic circuits following the inputs from the two connectors are identical so only the J1 input circuits are described herein...

Page 32: ...which triggers the clock input to the latch When the latch toggles U7B pin 5 goes low and pin 6 goes high U7A is latched in this state until a reset is received through a fresh system power up or unti...

Page 33: ...to illuminate it also signals the remote control board that an amplifier fault has occurred The Display Board output is found on J10 11 and the remote control output is found on J11 5 The input to Q6...

Page 34: ...2 Volt input provides all of the positive voltage requirements for the up converter 3 7 Display Board P N 50527000 Schematic Diagram 50527002A D1PC1 The Display Board contains the LED status indicator...

Page 35: ...of the flip flop circuits U4 and U5 are dual flip flop devices with set and reset and are configured to act as a four section shift register On power up the default state has the gate of Q11 high and...

Page 36: ...is biased with 9 volts at 200ma The U1 output is coupled to the second gain stage Q1 through a microstrip network Q1 has a variable bias circuit adjusted by R20 The bias adjustment is necessary to co...

Page 37: ...or circuit on the control board The voltage regulator U3 provides a stable 5 volts for gate bias circuits of Q1 Q2 and Q3 3 9 Remote Control Status Board P N TBD D1PC3 Schematic Diagram Available Q2 2...

Page 38: ...n Diagram 50500000 A1 The main chassis contains the 12V power supply sub chassis and its associated Power Supply modules The power supply sub chassis provides space for six power supply modules The Po...

Page 39: ...nd will support two Power Amplifier modules The module provides a 2 regulation of the rated voltage output of 12vDC The input voltage range is 85 264VAC and the operating peak peak2 ripple and noise r...

Page 40: ...o outputs of CP1 are equal in amplitude but 90 degrees out of phase The two splitter outputs feed the circuits of Q1 and Q2 which are identical The gate bias circuits of Q1 and Q2 are adjusted by pote...

Page 41: ...the amplifier devices are drawing current and the drain voltages are below 11V U6 provides an open output U6 compares the drain voltages through CR1 CR5 against an 11 volt reference If the amplifier c...

Page 42: ...sed by the Metering Detector These RF signals include a sample of the forward power from the final amplifier and reflected power returned from the output connector There is no field repair for the met...

Page 43: ...licensees of EMCEE Communications without the prior written consent of EMCEE Communications is strictly prohibited Copyright 2006 EMCEE Communications All rights reserved This copyright notice should...

Page 44: ...duction merger translation modification enhancement or use by anyone other than authorized employees or licensees of EMCEE Communications without the prior written consent of EMCEE Communications is s...

Page 45: ...NTENANCE 5 1 Periodic Maintenance Schedule OPERATION RECOMMENDATION OUTPUT POWER CALIBRATION Upon installation and at one year intervals thereafter see section 5 6 FANS Inspect every year and clean wh...

Page 46: ...al and aural IF carrier levels or digital input level The general problem area will be indicated by simply checking the diagnostic indications from the front panel display and the fault LEDs on the co...

Page 47: ...ion exists in the Final Amplifier Assembly the transmitter is in VSWR overload as discussed previously or one of the Up Converter Drawer modules has failed Correct these five conditions as required to...

Page 48: ...NO OUTPUT POWER 12 VOLT SUPPLY CIRCUIT HAS OUTPUT BUT NO FINAL RF DRIVE IF LOCK and or LO LOCK INDICATORS ARE OFF ON OFF INDICATOR IS ON Reference Oscillator Failure Check for correct level and freque...

Page 49: ...R DISTORTED OUTPUT SIGNAL LO LOCK INDICATOR IS OFF Failed 1 st Converter Check Reference Oscillator for correct level and output frequency 10MHz Check 1st Converter for correct frequency and output Re...

Page 50: ...rectional coupler and the attenuators used in your test set up HSD Control Board P N 50528000 5 6 1 Forward Power Calibration 1 With the OPERATE STANDBY switch to STANDBY connect the test equipment an...

Page 51: ...e Aural Carrier Adjust fully counterclockwise on the modulator and place the ON OFF control to OFF 8 Reverse the connections on the sample ports of the Metering Coupler this creates a 1 1 VSWR The Met...

Page 52: ...h The pre corrector circuit is located on the 1st IF Board which is contained in the Up Converter Drawer Use the potentiometers R18 to adjust the slope and R58 to adjust the threshold of the pre corre...

Page 53: ...in 1 MHz steps The LO circuit has an adjustment range of 194 MHz between 2125 MHz and 2321 MHz Use the switches S3 S2 and S1 to set the 100 MHz 10 MHz and 1 MHz steps respectively to transmit on the...

Page 54: ...75 1 2 9 2129 2 B1 2509 2507 25 2511 75 1 3 5 2135 3 A2 2515 2513 25 2517 75 1 4 1 2141 4 B2 2521 2519 25 2523 75 1 4 7 2147 5 A3 2527 2525 25 2529 75 1 5 3 2153 6 B3 2533 2531 25 2535 75 1 5 9 2159...

Page 55: ...Part 27 5 Set the LO frequency with the switches as indicated in the chart to transmit on the desired EBS BRS channel EBS BRS Center Visual Aural Switch Configurations LO Channel Designator Frequency...

Page 56: ...preting Amplifier Fault Indications The HSD Up Converter front panel has a single LED which indicates that an amplifier fault has occurred The HSD is configured with a Driver Amplifier and one or more...

Page 57: ...ghts reserved This copyright notice should not be construed as evidence of publication 5 10 Calibrating Voltage Indications To calibrate the front panel meter voltage measurements use the trim potenti...

Page 58: ...ications All rights reserved This copyright notice should not be construed as evidence of publication 6 PARTS LISTS Parts lists are provided for the following modules and assemblies and are listed in...

Page 59: ...C25 C32 C39 C40 GRM42 6X7R104K50V 1uF Capacitor SMT 1206 6 C27 GRM42 6C0G470J50V 47pF Capacitor SMT 1206 1 C28 GRM42 6C0G270J50V 27pF Capacitor SMT 1206 1 C31 GRM42 6X7R154K50V 15uF Capacitor SMT 120...

Page 60: ...7 RM73B2BT 203 J 20K Ohm Resistor SMT 1206 3 R54 R74 RM73B2BT 473 J 47K Ohm Resistor SMT 1206 2 R31 R32 RM73B2BT 104 J 100K Ohm Resistor SMT 1206 2 R36 R53 RM73B2BT 474 J 470K Ohm Resistor SMT 1206 2...

Page 61: ...stor SMT 1206 1 R4 R5 RM73B2B 240 J 24 Ohm Resistor SMT 1206 2 R11 RM73B2BT 470 J 47 Ohm Resistor SMT 1206 1 R9 RM73B2BT 151 J 150 Ohm Resistor SMT 1206 1 R13 RM73B2BT 391 J 390 Ohm Resistor SMT 1206...

Page 62: ...he prior written consent of EMCEE Communications is strictly prohibited Copyright 2006 EMCEE Communications All rights reserved This copyright notice should not be construed as evidence of publication...

Page 63: ...C2 C4 C7 C8 GRM42 6C0G040C50V 4pF Capacitor SMT 1206 5 C3 C5 C9 C11 C14 C19 GRM42 6C0G104M50V 1uF Capacitor SMT 1206 10 C22 C25 C26 C27 C6 600 S 1R2 B W 250 1 2pF Capacitor SMT 0603 1 C12 C13 C15 C16...

Page 64: ...6 14 C10 C11 C14 C15 C23 C24 C26 C18 GRM42 6C0G471J50V 470pF Capacitor SMT 1206 1 C19 C20 GRM42 6C0G221J50V 220pF Capacitor SMT 1206 2 C25 GRM42 6X7R154K50V 15uF Capacitor SMT 1206 1 C2 C22 GRM42 6Y5V...

Page 65: ...he prior written consent of EMCEE Communications is strictly prohibited Copyright 2006 EMCEE Communications All rights reserved This copyright notice should not be construed as evidence of publication...

Page 66: ...7 Ohm Resistor SMT 1206 1 R7 RM73B2BT 271 J 270 Ohm Resistor SMT 1206 1 R8 R35 RM73B2BT 0 0 Ohm Resistor SMT 1206 2 R9 RM73B2BT 121 J 120 Ohm Resistor SMT 1206 1 R11 R24 RM73B2BT 510 J 51 Ohm Resistor...

Page 67: ...Capacitor SMT 0603 2 C16 600 S 100 B W 250 10pF Capacitor SMT 0603 1 C54 C62 ECE V1EAG100P 10uF Capacitor 25V SMT 2 C7 C27 195D476X0010Z2T 47uF Capacitor Tant 10V SMT 2810 2 C14 C17 C20 9402 0 SL1 5 2...

Page 68: ...1 U2 DG442DY IC Switch Quad SPST SOIC 16 1 U3 74HC123D IC Multi vibrator Dual Mono SOIC 16 1 U4 U5 74HC74D IC Dual Flip Flop SOIC 14 2 Q1 Q11 IRLML2803 Transistor HEXFET 11 DS1 DS2 DS3 SSL LX3044LGD...

Page 69: ...IRLML2803 Transistor HEXFET Power MOSFET 12 U1 U2 U5 U6 74HC21 4 U3 U4 U8 U9 74HC08D IC 4 U7 74HC74 IC 1 U10 U13 AD823AR IC Dual Op Amp 2 U11 U12 AD633AR IC Dual Op Amp 2 U14 MC7805CDT IC5V Regulator...

Page 70: ...C Regulator 1 U6 LM339M IC 1 U7 MC7805CDT IC 1 R1 R2 R3 R4 RM73B2BT 201 J 200 Ohm Resistor SMT 1206 4 R5 R8 R14 R15 R16 R17 RM73B2BT 100 J 10 Ohm Resistor SMT 1206 8 R18 R19 R6 R9 3214W 1 201 200 Ohm...

Page 71: ...yright notice should not be construed as evidence of publication HSD 2500 Transmitter P N 50531000 12 5 Watt Amplifier Parts List Page 2 Reference Designator EMCEE Part Number Value Description Quanti...

Page 72: ...eference Designator EMCEE Part Number Value Description Quantity Assembly U1 3 AD8361 IC DETECTOR AD8361ARM 2 U2 4 AD823AR IC DUAL OP AMP 2 CR1 2 MMBD914 DIODE 2 C2 5 6 8 1 GRM42 6Y5V104Z25V 1uF CAP C...

Page 73: ...be construed as evidence of publication 7 SCHEMATIC DIAGRAMS This section contains schematic diagrams The diagrams are found in the following order Following each schematic diagram the associated cir...

Page 74: ...TUS AMP 1 12V STATUS AMP 1 12V AMP 4 FAULT AMP 3 FAULT AMP 2 FAULT AMP 1 FAULT AMP 4 TEMP STATUS AMP 3 TEMP STATUS NC AMP 1 GND AMP 2 12V AMP 3 12V AMP 4 12V NC NC NC NC AMP 2 GND AMP 3 GND AMP 4 GND...

Page 75: ...14 10 11 12 13 15 16 17 18 21 20 19 22 23 24 25 AMP 5 12V STATUS AMP 7 TEMP STATUS AMP 8 TEMP STATUS AMP 6 12V STATUS AMP 7 12V STATUS AMP 8 12V STATUS AMP 5 TEMP STATUS AMP 6 TEMP STATUS NC AMP 7 12V...

Page 76: ...R28 270 R24 1 5K R27 470 1uF C25 C23 01uF 5V C24 01uF 180 R19 R21 150 8 2 R20 R22 8 2 01uF C22 R23 470 C26 01uF OUTPUT J2 E2 R26 470 R36 47K 2 3 U3A 1 15uF C31 62 R7 C6 01uF R35 10K 10K R34 5V U3B 6 7...

Page 77: ...ranslation modification enhancement or use by anyone other than authorized employees or licensees of EMCEE Communications without the prior written consent of EMCEE Communications is strictly prohibit...

Page 78: ...P LINES ON PC BOARD NOTE 374 MHz 20 270 R1 R2 270 R3 ADE 3G MX1 1 4 5 1 2 3 6 24 R5 5V 4pF C1 1uF C5 5V 4pF 1uF 24 R4 C2 C4 CHANNEL 2500 2700MHz 1MHz STEPS MC68HC711E9CFN2 U8 12 21 24 22 23 19 20 18 1...

Page 79: ...ation modification enhancement or use by anyone other than authorized employees or licensees of EMCEE Communications without the prior written consent of EMCEE Communications is strictly prohibited Co...

Page 80: ...24002A 6 15 06 CTT E4 CP2 J4 Q3 CR4 U3 FL3 R21 C27 SCHEMATIC DIAGRAM U1 AH102A 1 2 4 3 12V 7pF C6 E1 J2 C1 4pF RF IN R1 10 C5 C4 4pF 1uF Q1 FLU17ZM C7 4pF C8 4pF 1uF C9 22uF C10 20V C2 4pF 1uF C3 15 R...

Page 81: ...ation modification enhancement or use by anyone other than authorized employees or licensees of EMCEE Communications without the prior written consent of EMCEE Communications is strictly prohibited Co...

Page 82: ...MIMIMUM 27pF C1 L1 10uHY CR2 MMBD914 CR3 100 R10 C4 1uF 2 7K R1 MMBD914 CR1 22uF C2 470K R2 R4 10K R3 10K 6 5 U1B 7 AD823 U1A AD823 2 3 1 8 B 1uF C3 R5 30K 5V R6 10K 4 5V R9 10K 10MHz INDICATION EXTE...

Page 83: ...ation modification enhancement or use by anyone other than authorized employees or licensees of EMCEE Communications without the prior written consent of EMCEE Communications is strictly prohibited Co...

Page 84: ...5V C59 27pF C60 27pF R33 1M 100 R32 X1 4 7K R34 5V C61 1uF CLOSED PAL OPEN NTSC R35 4 7K R29 R28 4 7K 5V 1uF C56 22uF C53 5V 4 7K R26 1K R22 1K R21 1K MC34064 U8 1 3 2 1uF C58 R31 4 7K NC MC34164 8 6...

Page 85: ...ation modification enhancement or use by anyone other than authorized employees or licensees of EMCEE Communications without the prior written consent of EMCEE Communications is strictly prohibited Co...

Page 86: ...XD Q5 100K R11 G S D 100K R13 S DS5 620 R10 SSL LX3044LID VSWR OVLD Q6 D 100K Q7 G R15 S D FAULT DS7 R12 620 R14 620 12V GND GND 10 MHz EXTERNAL IF INPUT LO LOCK STANDBY OPERATE OVERLOAD VSWR FAULT AM...

Page 87: ...lation modification enhancement or use by anyone other than authorized employees or licensees of EMCEE Communications without the prior written consent of EMCEE Communications is strictly prohibited C...

Page 88: ...TEMP STATUS AMP 7 TEMP STATUS J2 11 J2 10 J2 8 J2 9 NC NC J2 14 J2 12 J2 13 AMP 5 GND AMP 8 12V AMP 6 12V AMP 7 12V J2 19 J2 18 J2 16 J2 17 12V NC NC J2 22 J2 20 J2 21 NC NC NC NC NC NC AMP 8 GND AMP...

Page 89: ...lation modification enhancement or use by anyone other than authorized employees or licensees of EMCEE Communications without the prior written consent of EMCEE Communications is strictly prohibited C...

Page 90: ...20 Q3 S G S S R14 10 C19 1uF C18 12 pF TO FL8 E6 E5 G D 12pF C31 6pF C30 E15 TO E8 1 5pF C26 12 C27 pF 12pF C28 22uF C25 1uF 20V T1 C29 TO E15 FL4 E16 C70 C69 12 pF C71 22uF 1uF 20V TO E12 E11 C47 C48...

Page 91: ...ion modification enhancement or use by anyone other than authorized employees or licensees of EMCEE Communications without the prior written consent of EMCEE Communications is strictly prohibited Copy...

Page 92: ...NOT USED U2 AD823AR AD823AR U2 RFIN PWDN 3 4 U1 AD8361 1 2 6 VPOS IREF FLTR 8 7 5 SREF VRMS COMM 100pF C1 R3 R1 R2 J1 FORWARD SAMPLE 680pF C3 5V 10K R4 R5 10K 4 1uF C5 5V 1 2 3 MMBD914 CR1 470K R6 JP1...

Page 93: ...tion modification enhancement or use by anyone other than authorized employees or licensees of EMCEE Communications without the prior written consent of EMCEE Communications is strictly prohibited Cop...

Page 94: ...nslation modification enhancement or use by anyone other than authorized employees or licensees of EMCEE Communications without the prior written consent of EMCEE Communications is strictly prohibited...

Page 95: ...prohibited Copyright 2006 EMCEE Communications All rights reserved This copyright notice should not be construed as evidence of publication 8 OPERATING MANUAL RELEASE NOTES Manual Release 1 0 Note 1...

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