NEC DTU-70 Instruction Manual Download Page 74

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GWP-G22996

3 - 26

2) Setting of Rotary Switch & DIP Switch

The Rotary switch (SW2) & DIP switch (SW3) on the control board in

the TX control unit are set as follows.

a) SW2 (Rotary switch)

SW Position

Baud Rate

1200bps

2400bps

4800bps

9600bps

19200bps

38400bps

57600bps

115200bps

b) SW3 (DIP switch)

Serial control

enabled

disabled

Note) 1 : ON

0 : OPEN

1 : RTS/CTS control enabled

0 : RTS/CTS control disabled

1 : DTR/DSR control enabled

0 : DTR/DSR control disabled

1 : RS-232C

0 : RS-422/485

Summary of Contents for DTU-70

Page 1: ...kW UHF DIGITAL TV TRANSMITTER DTU 70 13R9SQDx2 18kW UHF DIGITAL TV TRANSMITTER INSTRUCTION MANUAL INSTRUCTION MANUAL INSTRUCTION MANUAL INSTRUCTION MANUAL DTU 70 13R9SQDx2 18kW UHF DIGITAL TV TRANSMIT...

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Page 14: ...TV TRANSMITTER...

Page 15: ...s DM 5000D Exciter HO2 344973 201 Power Divider HO2 344648 202 UX5000QF PA HO2 345123 201 Power Combiner HO2 344649 201 HPC 1605B TX Control HO2 344971 201 SNMP Agent for TV TX HO2 344119 201 WEB Remo...

Page 16: ...rage Picture Level Attenuator Automatic Average Blower Buffer Amplifier Balance Band Elimination Filter Band Pass Filter Capacitor Calibration CCIR CCW CIB D CIN D CH CI CLK CN CNO CO COAX COM COMB CO...

Page 17: ...ferential Phase Digital Video Compensator Electro Lunminescent Display Envelope Equalizer Exciter External Fuse Frequency G H I J FB F B FC FIFO FIL FIL FIR FM FPA FREQ G GND GDC HF HT IC ICPM ID I D...

Page 18: ...ker A Kind of Multi Sound System Normal Invert Nation Television System Committee O P NVRAM OCXO OFS OL OLR O P OPE OPF OSC P PA PAL PARA PCB PC PI PCM PIE PJ PLL PO POW PRE EM PROC PS PWB PWR Nonvola...

Page 19: ...c Wave Subcarrier Silicon Controlled Rectifer S quentiel Coulours A M moire Select Separator Signal Generator Signal T U S RFRM ST STL SW SYG SYNC SYNTHE T TB TCXO TEMP TDR TH T L TOCOM TR TRS TTL TX...

Page 20: ...iable Capacitor Voltage Controlled Crystal Oscillator Video Distribution Amplifier Variable Frequency Oscillator Very High Frequency Variable Resistor Vestigial Single Side Band Vestigial Single Side...

Page 21: ...5 Composition 2 6 2 5 1 Functional Composition 2 6 2 5 2 Physical Composition 2 9 SECTION 3 FUNCTIONAL DESCRIPTION 3 1 Exciter Section 3 2 3 1 1 Characteristics 3 2 3 2 Power Amplifier Section 3 3 3...

Page 22: ...RATION AND ADJUSTMENTS 4 1 General 4 1 4 2 Operation Panel 4 8 4 3 Control Mode Selection 4 12 4 4 Starting and Stopping 4 13 4 5 LCD Display Monitor 4 15 4 6 Setting 4 22 4 6 1 Setting of Time 4 22 4...

Page 23: ...ck of Soldering 5 8 5 5 4 Check Items for Exciter 5 9 5 5 5 Check Items for Coaxial System 5 9 5 6 Probable Causes of Troubles 5 10 5 6 1 Inability Starting 5 10 5 6 2 Output Lowering 5 10 5 6 3 C N L...

Page 24: ...d Parts 6 5 6 2 1 Definitions 6 5 6 2 2 Duration of repair service 6 5 6 2 2 1 Repair period 6 5 6 2 3 Supply of Parts Units and Purchased Units for repair 6 5 6 2 3 1 Parts supply 6 5 6 2 3 2 Unit su...

Page 25: ...SECTION 1 CAUTION AND SAFETY...

Page 26: ...mitter must be correctly handled and operated 1 2 Cautions for Use Expresses condition of a possible dangerous that has possibility of causing personal death or injury if not avoided HIGH VOLTAGE Supp...

Page 27: ...material defects only 1 Be sure to place the transmitter in vertical position without slanting 2 Do not step onto the top of the transmitter 3 Do not step onto the piping nor place any article on the...

Page 28: ...a part of accessories Disposing of your used NEC product In the European Union EU wide legislation as implemented in each Member State requires that used electrical and electronic products carrying th...

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Page 37: ...SECTION 2 GENERAL INFORMATION...

Page 38: ...his technology contributes to more than 18 efficiency improvement from conventional model In case of frequency change implement with replacement of a few parts helps operators to reduce time needed to...

Page 39: ...of a transmitter With the adaptive function routine maintenance activities are greatly reduced 7 Ease of Operation and user friendly monitoring Equipped with a character 40 x 2 display panel or optio...

Page 40: ...5kW 9R9 9 9kW 11R2 11 2kW 12R6 12 6kW 13R9 13 9kW 16R5 16 5kW b Configuration S Single Transmitter P Single Transmitter with Dual Drive Multiple PAs and Dual Cooling PE Single Transmitter with Dual D...

Page 41: ...PA PA TX CONTROL EX PA PA TX CONTROL EX PA PA TX CONTROL EX PA PA EX TX A TX B 9 Port U Link Frame Combiner SYSTEM CONTROL Main Stand by exciters are switched automatically in case of trouble on main...

Page 42: ...l reference Power supply Voltage Voltage stability Frequency stability Power consumption 380 400 415V 3 phase 4 wire 10 15 2 Approx kVA Dimension Width Height Depth Up to 16 5kW Over 16 5kW 615mm 1230...

Page 43: ...e names from both a functional and physical point of view This will assist in the proper operation and maintenance of the transmitter 2 5 1 Functional Composition Separate functions of the transmitter...

Page 44: ...Switch UX5000QF Power Amplifier Divider Combiner HPC 1605 TX Control Color LCD Display Optional Pump Rack Single Pump type Heat Exchanger No redundant fan type S Type DTU 70 2R9SQ F D 1 2 1 1 1 1 1 1...

Page 45: ...xciter Switch UX5000QF Power Amplifier Divider Combiner HPC 1605 TX Control Color LCD Display Optional Pump Rack Dual Pump type Heat Exchanger Redundant fan type P Type DTU 70 2R9PQ F D 1 1 2 1 1 1 1...

Page 46: ...pical DTU 70D series transmitter are shown in Fig 2 1 and Fig 2 2 The DTU 70 Transmitter up to 16 5kW is mounted in one rack which accommodates exciters PAs and control unit Fig 2 1 Front and rear vie...

Page 47: ...GWP G22996 2 10 Fig 2 2 Front and rear view of the DTU 70D series transmitter...

Page 48: ...SECTION 3 FUNCTIONAL DESCRIPTION...

Page 49: ...ons of the DTU 70D series by reference to the circuit sections introduced in 2 5 as well as to the block diagram of Fig 3 1 Power Supply EXCITER CIRCUITS See 3 1 TS OUTPUT FILTER See 3 4 To Antenna PO...

Page 50: ...xciter Table 3 1 Electrical Characteristics of Exciter Function Characteristics TS Input TSoIP Input Output Level Output Frequency Output Connector RF Feedback Input Level Input Connector Reference In...

Page 51: ...l connector Current checking Type of unit Cooling system 504 W 105 H 762 D Include Front Panel Approx 34kg Include Front Panel BNC J front WX 39D plug in rear Plug rear Plug rear Plug rear Front opera...

Page 52: ...mitter For details refer to the Instruction Manual of Pump Rack in section 6 and Heat Balance in 1 General of Vol II The cooling system below is in passive reserve The pump can be replaced any time du...

Page 53: ...spurious of the outputs of the power amplifier section Also this harmonic filter consisted of 4 short circuit is used to protecting against lighting Table 3 3 Attenuation characteristic of filters Fi...

Page 54: ...od Each of the controlled circuit sections of the transmitter sends out or receives number of status signal via solid state relays and electromagnet switches The transmitter employs a mechanical inter...

Page 55: ...o REMOTE MODE Yes LOCAL LED lights No Yes LOCAL LED lights TX ON LED lights START LOCAL LOCAL TX ON REMOTE TX ON ON CONT MEMORY EXTERNAL INTERLOCK RECYCLING HOLD COOLING ON PA PS ON COMMUNICATION WITH...

Page 56: ...FF CONTROL LOCAL No REMOTE MODE Yes ON CONT MEMORY OFF START REMOTE LED lights LOCAL LED lights END PA PS OFF COOLING OFF DELAY 39sec Yes No TX ON LED goes off LOCAL TX ON REMOTE TX ON Fig 3 4 Flow Ch...

Page 57: ...ystem The exciter section and the cooling section both adopting the stand by systems are controlled Stand by systems are only P type TX 3 If this kind of fault is encountered the transmitter is not st...

Page 58: ...F operation notching with 3 COOLANT TEMP The coolant temperature exceeds setting temperature PA PA PS TX OFF 4 COOLANT EMPTY The coolant tank on the pump rack has become empty PUMP PUMP OFF TX OFF Fau...

Page 59: ...mined to be abnormal 3 Output Power The output power of the transmitter rises by 0 8dB or lowers by 1dB b Reset To reset the transmitter after one of the faults described in item a above is encountere...

Page 60: ...nd a operation button that carries out start stop of the transmitter Setting of the output frequency and clock time is made on this panel Fig 3 5 and 3 6 show visual appearance of the operation panel...

Page 61: ...GWP G22996 3 13 Fig 3 6 Outside view of operation panel P Type 12 9 13 10 14 11 15 12...

Page 62: ...OCAL mode 6 RESET switch For alarm reset 7 CPU RESET switch For CPU reset of the TX control 8 MENU switch For display MENU screen 9 OPTION switch For display setting screen with MENU switch 10 ESC swi...

Page 63: ...Transmitter Amber indication 7 TX ALARM Some alarms occur in the Transmitter Red indication 8 CPU ALARM Indicates the CPU is fault condition Red indication 1 9 EX A Indicates the Exciter A is in use...

Page 64: ...n incorporates an output power lower and higher detect circuit and in case the output power is not normal an output power fault answer is sent to the TX control section The monitor section is also fur...

Page 65: ...l II and mechanical drawings 3 7 1 AC Line See Table 3 6 Table 3 6 Connectors for AC Line No Item Transferred through Remarks 1 AC mains ACB101 supply voltage 3 x 380V 400V 415V 2 EX and Control ACB20...

Page 66: ...el layout of exciter is shown in Fig 3 8 The interface board is mounted on the rear side of the TX control Fig 3 8 Rear view of exciter 3 7 3 RF Monitor See Table 3 7 Table 3 7 Connectors for 50 RF Mo...

Page 67: ...h external control equipment through an interface board of TX control The interface board is shown in Fig 3 9 The interface board is mounted on the rear side of the TX control Fig 3 9 Rear side view o...

Page 68: ...indication sent out to remote site is released 4 EX A Select 1 4 15 16 Command to select the exciter A 5 EX B Select 1 5 15 16 Command to select the exciter B 6 PUMP A Select 2 6 15 16 Command to sele...

Page 69: ...in use 19 EX B USE ANS 1 23 30 31 Means that the exciter B is in use 20 PUMP A USE ANS 2 24 30 31 Means that the Pump A is in use 21 PUMP B USE ANS 2 25 30 31 Means that the Pump B is in use 22 H EXC...

Page 70: ...the Drive PA A output power is abnormal 6 DPA B FAULT 6 41 42 Means that the Drive PA B output power is abnormal 7 EXSW FAULT 7 41 42 Exciter switch is under the abnormal condition 8 OUTPUT FAULT 8 41...

Page 71: ...1 42 22 PRESSURE FAULT 22 41 42 Means that the pressure of the coolant became lower than the set point 23 PUMP A FAULT 23 41 42 The water pressure in the pump is abnormal 24 PUMP B FAULT 24 41 42 25 P...

Page 72: ...ly for transmitter is abnormal such as undervoltage or phase failure 36 TOTAL ALARM 36 41 42 Some fault occurred in the transmitter 37 TOTAL WARNING 37 41 42 Means that some minor fault occurred in th...

Page 73: ...display The method of setting and specifications related to serial communications are described below 1 Setting of hardware 1 Setting of jumpers Jumpers on the control board in the TX control unit are...

Page 74: ...Rotary switch 7 6 5 4 3 2 1 0 SW Position Baud Rate 0 1200bps 1 2400bps 2 4800bps 3 9600bps 4 19200bps 5 38400bps 6 57600bps 7 115200bps b SW3 DIP switch 8 7 6 5 4 3 2 1 2 1 Serial control 0 0 enabled...

Page 75: ...GWP G22996 3 27 Fig 3 10 Parts layout of control board in TX control Positions of jumpers on the control board Positions of SW 2 3 on the control board...

Page 76: ...TERFACE BOARD Pin No Signal 1 2 Receive Data RXD 3 Transmit Data TXD 4 Data Terminal Ready DTR 5 Ground 6 Data Set Ready DSR 7 Request to Send RTS 8 Clear to send CTS 9 2 RS 422 Table 3 12 REMOTE CONT...

Page 77: ...No Signal 1 2 3 Transmit Data TXD 4 Transmit Data TXD 5 Ground 6 Receive Data RXD 7 Receive Data RXD 8 9 Table 3 14 REMOTE CONTROL J4 on INTERFACE BOARD for daisy chain Pin No Signal 1 2 3 Transmit Da...

Page 78: ...7 5 INTERFACE BOARD TX D TX D RX D RX D GND TX D TX D RX D RX D GND to next equipment from previous equipment Connection for 2 wire TX J3 J4 3 4 6 5 4 3 7 5 INTERFACE BOARD TX D RX D TX D RX D GND GND...

Page 79: ...dication sent out to remote site is released 4 EX AGC OFF CONT 4 14 15 Command to cut off the AGC circuit when another transmitter is shut down 5 EX A AGC OFF CONT 9 14 15 Reserved 6 EX CHANGE SET 5 1...

Page 80: ...ngeover to the stand by exciter 18 EX CH CONT 27 34 35 Sends out the EX CHANGE signal as an exciter changeover signal when the exciter in use came to a fault 19 EX INPUT 28 34 35 When a signal is ente...

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