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GWP-G22996

3 - 10

Table 3-4 Faults from which the transmitter must be protected

Item

Fault Condition

Component to be

Protected

Control Item

1. PA TEMP

The temperature on the chassis of the

PA exceeds setting temperature.

Faulty unit : OFF

2. REFLECT

The reflected power exceeds

threshold value.

TX : OFF













operation

notching

with

3. COOLANT

TEMP

The coolant temperature exceeds

setting temperature.

PA PS

TX : OFF

4. COOLANT

EMPTY

The coolant tank on the pump rack

has become empty.

PUMP

PUMP : OFF

TX : OFF

•

Faults which, if encountered, will cause indication only (see Table 3-5).

When one of these faults is encountered, the TX control unit will hold the

LED indication “ALARM” on the operation panel and send out a fault

answer to the external circuitry.

∗

Fault indications on the LCD Display are not hold (locked).

Содержание DTU-70

Страница 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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Страница 14: ...TV TRANSMITTER...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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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Страница 37: ...SECTION 2 GENERAL INFORMATION...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 48: ...SECTION 3 FUNCTIONAL DESCRIPTION...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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