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1 I R T Electronics Pty Ltd A.B.N Hotham Parade, ARTARMON N.S.W. 0 AUSTRALIA National: Phone: (0) 99 7 Fax: (0) International: sales@irtelectronics.com Web: IRT Eurocard Types DVT-0 Fibre Optic Laser Transmitter for SMPTE 9M Signals & DVR-0 Fibre Optic Receiver for SMPTE 9M Signals Invisible LASER radiation- Avoid direct exposure to beam Peak power Wavelength Class Laser Product mw 00 nm Designed and manufactured in Australia IRT can be found on the Internet at: 0-dvt & 0-dvr.ib.rev.doc Page of 7/0/007

2 DVT-0 & DVR-0 Serial Digital Fibre Optic Link for SMPTE 9M Signals Instruction Manual Table of Contents Item Page Operational Safety Description Applications Technical Specifications Cicuit description Pre-Installation 8 Installation 9 Front and rear layouts Warranty & service Equipment return Drawing index This instruction manual applies to DVT-0 assembly 807 and DVR-0 assembly 80 units later than S/N Operational Safety: WARNING Operation of electronic equipment involves the use of voltages and currents that may be dangerous to human life. Note that under certain conditions dangerous potentials may exist in some circuits when power controls are in the OFF position. Maintenance personnel should observe all safety regulations. Do not make any adjustments inside equipment with power ON unless proper precautions are observed. All internal adjustments should only be made by suitably qualified personnel. All operational adjustments are available externally without the need for removing covers or use of extender cards. 0-dvt & 0-dvr.ib.rev.doc Page of 7/0/007

3 Description The IRT DVT-0 and DVR-0 are transmit and receive modules designed principally for use as a SMPTE9M.8 Gb/s serial digital video Fibre Optic transmission link, using 9/ single mode fibre for path lengths with path attenuation of 0 db or less. This enables the use of space saving fibre optic cable for reliable transmission of digital video signals over lengths greater than can be provided with coaxial cable. The transmit / receive system specifications apply to all signal conditions, including the SMPTE 9M pathological test sequence. The DVT-0 transmitter features an input circuit with automatic cable equalisation for Belden 88 coaxial cable followed by a 00nm LASER transmitter. The DVR-0 receiver uses a PIN photodiode detector preamplifier module, signal conditioning and a reclocking circuit for the.8 Gb/s data rate, with bypass of the PLL reclocking circuit for other data rates which allows the link to be used for the 70 Mb/s SDI and ASI signals. Two serial digital outputs are provided from the transmission link, one in phase output on the rear and one inverted signal monitoring output on the front panel of the receiver. On the DVT-0 transmitter LED indicators on the front panel indicate the presence of signal, end of cable equaliser range, loss of laser power and presence of DC power. A relay contact output for remote indication will indicate failure of the laser operation. On the DVR-0 receiver LED indicators on the front panel indicate PLL lock at.8gb/s, PLL bypass for 70 Mb/s operation, signal presence and presence of DC power. A relay contact output for remote indication will indicate loss of signal. Applications The DVT-0/DVR-0 Serial Digital Fibre Optic transmission system is intended to be used where reliable signal transmission of.8 Gb/s data is required over distances greater than 00 metres, or where the space saving and immunity to electromagnetic interference of optical fibre cable is required. The system is intended for use with 9/ single mode fibre which typically has an attenuation of less than 0. db/km giving a typical maximum link length of km when allowing for safety margin. The DVT-0/DVR-0 is designed to work reliably over the full 0 to 0dB optical path range and will pass the pathological test sequence at both.8gb/s and 70Mb/s data rates. 0-dvt & 0-dvr.ib.rev.doc Page of 7/0/007

4 Technical Specifications DVT-0 Serial digital to Optical transmitter Serial digital input: Input impedance 7Ω. Input return loss >db MHz to. GHz. Input serial data signal SMPTE/EBU.8Gb/s or 70 Mb/s. Input circuit cable compensation Automatic, up to 00 metres of Belden 88 or equivalent cable at.8 Gb/s and 70 Mb/s. Optical output: Optical output power 0dBm +0, db. Optical rise/fall time <0ps. Optical wavelength 0nm ± 0nm. Spectral width nm typically. Connectors: Serial digital input Optical output Alarm/Control connections Alarm outputs Control input Indicators: Serial digital signal present Cable Equaliser at maximum range Laser power DC power Power requirement: Voltage Consumption General: Operating temperature B on. bracket attached to module. SC/PC on bracket attached to module. pin plug and socket with screw terminals for wire terminations. One relay energised in the normal condition to indicate loss of DC power, signal or laser power. Relay circuit is wired with contacts normally closed (or open) as set by a link on the circuit board. Grounding contact for laser disable. LED (green) for signal present. LED (yellow) for input cable >00m Belden 88 or equivalent. LED (red) for laser failure or disabled. LED (green) for. 8 Vac CT (-0- Vac) or ± Vdc..7 VA (0 ma). 0 to 0 C ambient. Mechanical Suitable for mounting in IRT 9" rack chassis with input, output and power connections to the rear. Size HP x U Extended Eurocard (0 mm x 00 mm). Weight With rear assembly 00g. Finish: Front panel Grey, black lettering & red IRT logo. Rear assembly Detachable PCB with connectors to Eurocard and external signals. Standard accessories: Rear connector panel (supplied with module). Due to our policy of continuing development these specifications are subject to change without notice. 0-dvt & 0-dvr.ib.rev.doc Page of 7/0/007

5 DVR-0 Optical to Serial digital receiver Optical input: Optical input power Optical wavelength -dbm min., 0dBm max. 0nm. Serial digital outputs: Number of outputs data reclocked at.8 Gb/s and non-reclocked at other rates e.g. 70 Mb/s. AC coupled. Output level 800 mv ±% into 7 Ω. Output impedance 7 Ω. Output return loss >db MHz to. GHz. Output rise/fall time 00ps nominal. Residual jitter <0.UI at.8gb/s reclocked. <0.UI at 70Mb/s non-reclocked. Connectors: Serial digital outputs, B on. bracket attached to module., B on front panel. Optical input Alarm/Control connections Alarm outputs Control input Indicators: Serial digital signal present and locked PLL bypassed Signal present Power Power requirement: Voltage Consumption General: Operating temperature SC/PC on bracket attached to module. pin plug and socket with screw terminals for wire terminations. One relay energised in the normal condition to indicate loss of DC power or signal. Relay circuit is wired with contacts normally closed (or open) as set by a link on the circuit board. Grounding contact for non-reclocked operation. LED (green) for signal locked at.8gb/s. LED (yellow) for non-reclocked operation. LED (green) for signal present, (red) for loss. LED (green) for. 8 Vac CT (-0- Vac) or ± Vdc..8 VA (00 ma). 0 to 0 C ambient. Mechanical Suitable for mounting in IRT 9" rack chassis with input, output and power connections to the rear. Size HP x U Extended Eurocard (0x00 mm). Weight With rear assembly 0g. Finish: Front panel Grey, black lettering & red IRT logo. Rear assembly Detachable PCB with connectors to Eurocard and external signals. Standard accessories: Rear connector panel (supplied with module). Due to our policy of continuing development these specifications are subject to change without notice. 0-dvt & 0-dvr.ib.rev.doc Page of 7/0/007

6 Circuit Description DVT-0: The DVT-0 circuit consists of U a GS0 input circuit that provides automatic cable equalisation for up to 00 metres of Belden 88 cable and detection of input signal. Comparator U monitors the carrier detect output to provide a indication of the presence of input signal, and comparator U7 monitoring of the cable length indicator output enables indication of the point at which the cable equaliser circuit reaches maximum compensation. An optional circuit adjustment using RV, of the point at which the maximum cable length equalisation is reached can be included by closing LK. Maximum equalisation of 00 metres of Belden 88 or equivalent cable is provided if LK is left open. The signal is then processed by U a MAX laser diode driver circuit which with feedback from the photo-diode in the laser diode package provides automatic power control of the laser output power. Monitoring of the current in the photo-diode circuit gives an indication of the laser output power, this signal is amplified by U and a threshold detected by comparator U to indicate loss of laser power if this signal falls below the threshold. Comparator U is used to provide the entry point of a control signal to ground which can be used to disable U and thus turn the laser off, this control lead is brought out on the control connector SK on the rear panel. A alarm relay circuit provides a contact set also brought out on SK which will indicate the failure or switching off of the laser. Added alarm functions can be added to this circuit by optional links on the board, LK when closed will add loss of input signal to the alarm circuit and LK will add cable length equalisation at maximum to the alarm circuit. The signal and fibre connectors are mounted on a bracket attached to the module. The dual AC inputs are rectified by diode bridges DB and DB, and then regulated in a switch mode regulator module to provide the operating voltage for the unit. The front panel indicators are as follows: LD (green) DC power indicator, will light when DC power is present. LD (red) LD (yellow) LD (green) Alarm indicator, will light if the laser output fails or is switched off. Will light on the end if life indication from the laser driver circuit if LK is closed. Will light on the loss of input signal if LK is closed. Will light if the input cable equaliser circuit indicates that the maximum cable length is reached if LK is closed. Cable equaliser indicator, will light when the input cable equaliser circuit reaches maximum compensation. This is a voltage from the input circuit which is monitored by U7 comparator circuit against a reference set by RV. Signal present indicator, will light when the input circuit indicates the presence of signal. This indication is not dependant on the input signal data rate. 0-dvt & 0-dvr.ib.rev.doc Page of 7/0/007

7 DVR-0: Circuit Description The optical input signal is detected in U a FRMZ PIN photodiode and integral preamplifier module, the resulting electrical signal is amplified by U a MAX limiting amplifier. U includes a loss of signal indicator circuit and a mute circuit on loss of signal, the loss of signal threshold is adjusted using RV. Comparator U7 is used to drive the indicator and alarm circuit for the presence or loss of signal. The output from U is applied to U which together with U forms a PLL reclocking system working at.8gb/s. U provides a PLL lock indication which is used to drive indicator LD. U is used to provide an isolated entry point for a control signal from SK on the rear panel to enable the PLL bypass circuit of U when the system is used for data rates other than.8gb/s. U is driven by the output of U and provides two isolated outputs from the module. The output on the rear panel is the in phase signal output and the monitor output on the front panel is the inverted output from the cable driver circuit. A alarm relay circuit provides a contact set also brought out on SK which will indicate the failure of signal at limiting amplifier U. The dual AC inputs are rectified by diode bridges DB and DB, and then regulated in a switch mode regulator module to provide the operating voltage for the unit. A second dc-dc converter is used together with linear regulators U8 and U9 to provide the +9V bias and.v operating voltages for U the optical detector module. The front panel indicators are as follows: LD (green) LD (green/red) LD (yellow) LD (green) DC power indicator, will light when DC power is present. Received SIGNAL indicator, will light green when sufficient signal is present at the input to the limiting amplifier U and light red when insufficient signal is present and the amplifier mutes. PLL BYPASS indicator, will light when the PLL locking loop for.8gb/s is disabled for operation at other data rates such as 70 Mb/s. PLL LOCKED indicator, will light when the.8gb/s PLL is operating at and is locked to.8gb/s. 0-dvt & 0-dvr.ib.rev.doc Page 7 of 7/0/007

8 Pre-installation: Handling: This equipment may contain or be connected to static sensitive devices and proper static free handling precautions should be observed. Where individual circuit cards are stored, they should be placed in antistatic bags. Proper antistatic procedures should be followed when inserting or removing cards from these bags. Power: AC mains supply: DC supply: Earthing: Ensure that operating voltage of unit and local supply voltage match and that correct rating fuse is installed for local supply. Ensure that the correct polarity is observed and that DC supply voltage is maintained within the operating range specified. The earth path is dependent on the type of frame selected. In every case particular care should be taken to ensure that the frame is connected to earth for safety reasons. See frame manual for details. Signal earth: For safety reasons a connection is made between signal earth and chassis earth. No attempt should be made to break this connection. Installation in frame or chassis: See details in separate manual for selected frame type. 0-dvt & 0-dvr.ib.rev.doc Page 8 of 7/0/007

9 Installation Invisible LASER radiation- Avoid direct exposure to beam Peak power Wavelength Class Laser Product mw 00 nm Connection to the digital and fibre interfaces are to connectors mounted on a bracket attached to the rear of the module, care must be taken when inserting the module in a rack frame. Rear connections must be released before a module is removed from the rack frame. The DVT-0 and DVR-0 are set up to operate at.8 Gb/s and do not require any adjustment prior to use. There are no external controls on the unit and the internal signal mute control RV has been set for maximum sensitivity. For 70 MB/s operation the PLL lock circuit of the DVR-0 will need to be disabled by closing link LK on the circuit board or by connecting SK pin to SK pin on the rear panel. Note when using the external control, LK on the board must be closed to enable the external control circuit. The DVR-0 provides an extra signal output on the front panel for monitoring of the received signal. The external alarm contact and control connections are made to the pin connectors on the rear panel. The connections are: DVT-0 SK pin ground pin alarm relay common. pin alarm relay make or break - contact as set by LK8. pin laser disable control (operate by grounding to pin ). DVR-0 SK pin ground pin alarm relay common. pin alarm relay make or break - contact as set by LK. pin PLL lock bypass control (operate by grounding to pin ). 0-dvt & 0-dvr.ib.rev.doc Page 9 of 7/0/007

10 DVT-0: The DVT-0 will operate at.8 Gb/s and 70 Mb/s data rate without circuit changes. Link options are provided as follows: LK When closed enables adjustment of the maximum amount of cable to be equalised by the input circuit U. The output of U is muted when maximum cable length is reached. Leave this link open normally for maximum cable length compensation of 00 metres of Belden 88 or equivalent cable. LK When closed the output from U the input equaliser circuit is always enabled and the carrier fail circuit is disabled. LK When closed will add the laser end of life indication from the laser driver circuit to the alarm relay circuit operation. LK When closed add input signal loss to the alarm relay circuit operation. LK When closed will add the maximum cable length indication as set by RV to the alarm relay circuit operation. LK7 When closed will enable the remote shut-down of the laser driver output by the connection of SK pin to SK pin on the rear panel. LK8 Selects the normally closed or normally open contact set from the alarm relay to SK pins and on the rear panel. The connections are marked on the circuit board. DVR-0: The DVR-0 normally operates at.8 Gb/s but requires a link change for use at 70 Mb/s. This can be done by closing LK on the circuit board or by using the remote connection of SK pin to pin on the rear panel. Link options are provided as follows: LK When closed bypasses the PLL lock circuit of the reclocking circuit U to enable the transmission of signals at data rates other than.8 Gb/s. This mode of operation will cause the PLL bypass indicator LD on the front panel to light. LK Selects the normally closed or normally open contact set from the alarm relay to SK pins and on the rear panel. The connections are marked on the circuit board. LK When closed will enable the remote bypass of the PLL locking circuit of U, thus enabling this function without disturbing the installed module physically. LK must be open for the remote bypass function to work. 0-dvt & 0-dvr.ib.rev.doc Page 0 of 7/0/007

11 Front & rear panel connector diagrams The following front panel and rear assembly drawings are not to scale and are intended to show connection order and approximate layout only. SIGNAL EQ LASER DC DVT-0 CAUTION Direct connections to module N0 0 HDTV F.O. TX Sk DVR-0 LOCKED BYPASS SIGNAL OUTPUT MON. DC CAUTION Direct connections to module PLL N0 0 HDTV F.O. RX Sk 0-dvt & 0-dvr.ib.rev.doc Page of 7/0/007

12 Maintenance & storage Maintenance: No regular maintenance is required. Care however should be taken to ensure that all connectors are kept clean and free from contamination of any kind. This is especially important in fibre optic equipment where cleanliness of optical connections is critical to performance. Storage: If the equipment is not to be used for an extended period, it is recommended the whole unit be placed in a sealed plastic bag to prevent dust contamination. In areas of high humidity a suitably sized bag of silica gel should be included to deter corrosion. Where individual circuit cards are stored, they should be placed in antistatic bags. Proper antistatic procedures should be followed when inserting or removing cards from these bags. Warranty & Service Equipment is covered by a limited warranty period of three years from date of first delivery unless contrary conditions apply under a particular contract of supply. For situations when No Fault Found for repairs, a minimum charge of hour s labour, at IRT s current labour charge rate, will apply, whether the equipment is within the warranty period or not. Equipment warranty is limited to faults attributable to defects in original design or manufacture. Warranty on components shall be extended by IRT only to the extent obtainable from the component supplier. Equipment return: Before arranging service, ensure that the fault is in the unit to be serviced and not in associated equipment. If possible, confirm this by substitution. Before returning equipment contact should be made with IRT or your local agent to determine whether the equipment can be serviced in the field or should be returned for repair. The equipment should be properly packed for return observing antistatic procedures. The following information should accompany the unit to be returned:. A fault report should be included indicating the nature of the fault. The operating conditions under which the fault initially occurred.. Any additional information, which may be of assistance in fault location and remedy.. A contact name and telephone and fax numbers.. Details of payment method for items not covered by warranty.. Full return address. 7. For situations when No Fault Found for repairs, a minimum charge of hour s labour will apply, whether the equipment is within the warranty period or not. Contact IRT for current hourly rate. Please note that all freight charges are the responsibility of the customer. The equipment should be returned to the agent who originally supplied the equipment or, where this is not possible, to IRT direct as follows. Equipment Service IRT Electronics Pty Ltd Hotham Parade ARTARMON N.S.W. 0 AUSTRALIA Phone: 99 7 Fax: service@irtelectronics.com 0-dvt & 0-dvr.ib.rev.doc Page of 7/0/007

13 Drawing Index Drawing # Sheet # Description 807 DVT-0 serial digital fibre optic transmitter schematic diagram. 807 DVT-0 serial digital fibre optic transmitter schematic diagram. 807 DVT-0 serial digital fibre optic transmitter schematic diagram. 80 DVR-0 serial digital fibre optic receiver schematic diagram. 80 DVR-0 serial digital fibre optic receiver schematic diagram. 80 DVR-0 serial digital fibre optic receiver schematic diagram. 0-dvt & 0-dvr.ib.rev.doc Page of 7/0/007

14 J P Input and Laser circuit SK DDI ALARM DISABLE C D LS8 R 807s.sch 0uF LK7 R K R K7 0R D7 LS8 Q BC8 LK8 SK n.c. J A B A B A B A B A B A B 7A 7B 8A 8B 9A 9B 0A 0B A B A B A B A B A B A B 7A 7B 8A 8B 9A 9B 0A 0B A B A B A B A B A B A B 7A 7B 8A 8B 9A 9B 0A 0B A B A B DIN J optional power in A B A B A B A B A B A B 7A 7B 8A 8B 9A 9B 0A 0B A B A B A B A B A B A B 7A 7B 8A 8B 9A 9B 0A 0B A B A B A B A B A B A B 7A 7B 8A 8B 9A 9B 0A 0B A B A B RLB RLA V0 0 D LS8 n.o. 8 Power Supply Circuit AC R0 80R AC AC LD HLMP-0 'grn' 'DC' AC 807s.sch DINRA (used when fitted to FRU-00 frame) DVT-0 HDTV F.O. TX SIZE Title A COPYRIGHT DO NOT COPY NOR DISCLOSE TO ANY THIRD PARTY WITHOUT WRITTEN CONSENT DRAWN K.N SCALE Sheet Drawing No. 807 N.T.S. of IRT Electronics Pty. Ltd. ARTARMON NSW AUSTRALIA 0 CHECKED ECR --0 ECR8 PCB 808 ENG. APP. Revision: -Nov-00 Date:

15 R K C C 0uF R0 0K U LMVM R 0K Q BC8 R 0K R RV 00R R 0K LK 0R 00nF U7 LMVM Q BC8 R8 C 00nF 0R R 0R R K LK D LS8 LD HLMP-0 'Signal Present' 'grn' R9 0R LASER FLDCLK-B D LS8 C0 0nF C7 0nF R8 7R C8 0uF C9 0nF LK CD/MUTE U CLI C C TP R0 7R VEEB VEEB VEEB VEEB VEEB VEEA VEEA VEEA VEEA VCC VCC 0nF JP VEE VEE 0nF C8 7p L TP R7 8R 8 OUT+ SDO SDI nh R9 0R DDI R SDO SDI VEE VEE C9 7p R 7R 0R 0 MCLADJ 7 R 7R 9 GS0-CKD 8 R 7R C C0 0nF 0nF L uh C 0nF R7 K R9 00R LK R8 K7 U LMVM R 0K Q BC8 RV 0K0 R0 0K R 0K R R K7 R 0K U 0K R 00K LMVM DISABLE R K R K RV K R K0 R 0K R 0K RV K R K D ALARM R7 0K LS8 U LMVM R9 0K LK Q BC8 R R8 K 0R R7 0R DVT-0 HDTV F.O. TX Title SIZE A SCALE Sheet Drawing No. 807 N.T.S. of IRT Electronics Pty. Ltd. ARTARMON NSW AUSTRALIA 0 COPYRIGHT DO NOT COPY NOR DISCLOSE TO ANY THIRD PARTY WITHOUT WRITTEN CONSENT DRAWN K.N. CHECKED ENG. APP. Revision: Date: -Nov ECR Add JP --0 ECR8 LD HLMP-0 'Laser Fail or Off' 'red' LD HLMP-0 'Cable Length' 'yellow' 0R0 IPIN VIN+ 0 ENB- OUT- U MAX VCCA VCCB VCCA VCCB 0 VCCA VCCB 8 IBOUT ENB+ 7 VIN- 8 FAILOUT SLWST VREF VREF 9 C 00nF IPSET IMSET IBSET IBFB OSADJ 7 0 C 0nF

16 FL AC AC AC AC SIZE A Title DVT-0 SCALE Sheet Drawing No. 807 N.T.S. of IRT Electronics Pty. Ltd. ARTARMON NSW AUSTRALIA 0 F DB DB0 R7 L F HDTV F.O. TX Power Supply CONV ZUS 0 PBBA 0 C R L (0mA) VIN+ +V R7 R uh FL C 00uF uh C 0.uF C7 00uF D NB C 70uF C 70uF FL F DB DB0 C 00uF C 0.uF R VIN- -V R7 R L uh 7 F R7 FL COPYRIGHT DO NOT COPY NOR DISCLOSE TO ANY THIRD PARTY WITHOUT WRITTEN CONSENT DRAWN K.N. CHECKED ENG. APP Revision: -Nov-00 Date: ECR --0 ECR8

17 J P Detector and Output circuit +v +v SDO +9V +9V -.V -.V SDO LOS BYPASS 80s.sch LK SK n.c. J D LS8 n.o. J optional power in (used when fitted to FRU-00 frame) A B A B A B A B A B A B 7A 7B 8A 8B 9A 9B 0A 0B A B A B A B A B A B A B 7A 7B 8A 8B 9A 9B 0A 0B A B A B A B A B A B A B 7A 7B 8A 8B 9A 9B 0A 0B A B A B A B A B A B A B A B A B 7A 7B 8A 8B 9A 9B 0A 0B A B A B A B A B A B A B 7A 7B 8A 8B 9A 9B 0A 0B A B A B A B A B A B A B 7A 7B 8A 8B 9A 9B 0A 0B A B A B SK SK D7 LS8 R8 LK 70R D LS8 RLB RLA V0 0 8 Power Supply Circuit +v AC +v +v AC R7 80R +9V +9V 'DC' AC LD HLMP-0 'grn' AC -.V -.V DIN DINRA 80s.sch DVR-0 HDTV F.O. RX SIZE Title A COPYRIGHT DO NOT COPY NOR DISCLOSE TO ANY THIRD PARTY WITHOUT WRITTEN CONSENT DRAWN K.N SCALE Sheet Drawing No. 80 N.T.S. of IRT Electronics Pty. Ltd. ARTARMON NSW AUSTRALIA 0 CHECKED ECR --0 ECR8 ENG. APP. PCB 80 Revision: -Nov-00 Date:

18 L c 00nH C8 C7 C9 C70 uf nf nf uf L b 00nH C7 C0 C8 C9 uf nf nf uf b L0 a 00nH C0 C C C uf nf nf uf C8 R9 K7 R0 0K nf U b BYPASS CTRL Vcc U GO-CTA LMV b C0 C9 8 C7 0nF C R 0K R K7 R K uf uf nf O/P +9V Q BC8 7 LK Q BC8 C nf LFS LFS LFA_Vee LFA_Vcc LFA DFT_Vee L7 00nH R8 K C7 0n C nf R9 0R BYPASS PLCAP R7 0R PLL_LOCK PLCAP a IJI SHIELD C uf C uf LD HLMP-0 LD HLMP-0 0 DM VCO 9 U GS-CQM C nf DM VCO 7 R0 K U MAXCUE C 'PLL bypass' 'yell' 'PLL locked' 'grn' a CAZ C7 00pF 8 SHIELD 8 C nf D SQUELCH CAZ C 0nF C0 uf R8 7 SDO DDI_Vtt 9 nf Vcc R 0R b 7R R9 7R L9 C9 gnd VR DDI 0 OUT+ IN+ O/P LS8 C nf SDO DDI C 0nF IN- OUT- SHIELD Vcc nf C p c CD_Vcc Rset CD_Vee PD_Vee PD_Vcc C8 8.nH C 8p Vss R 0R C 0 LOS LEVEL 7 nf 9 LOS TH 8 U C8 C7 FRMZKT nf nf a C JP 0R nf C L nh 00pF C7 R 7R R 7R C R9 K C uf SDO R 8R U R7 0R uf u7 8 SDO SDI C C nf b R7 7R L 0nH 7 SDO SDI C VEE u7 c VCC Rset R0 0 GS08-CKA 0nF R 0K C 0nF b R K nf 8 RV K SDO U7 R K L8 00nH C 7 C nf D LMM R K R K R 0K nf R R R K7 -.V C 0nF Q BC8 LS8 Q BC8 LD L-WEGW R R 70R red No Signal D LOS 70R grn Signal LS8 DVR-0 HDTV F.O. RX Title SIZE A SCALE Sheet Drawing No. 80 N.T.S. of IRT Electronics Pty. Ltd. ARTARMON NSW AUSTRALIA 0 COPYRIGHT DO NOT COPY NOR DISCLOSE TO ANY THIRD PARTY WITHOUT WRITTEN CONSENT DRAWN K.N. CHECKED ENG. APP. Revision: Date: -Nov ECR Add JP. --0 ECR8 +9V +9V -.V -.V

19 AC AC AC AC SIZE A Title FL F DB DB0 DVR-0 SCALE Sheet Drawing No. 80 N.T.S. of IRT Electronics Pty. Ltd. ARTARMON NSW AUSTRALIA 0 R7 F L HDTV F.O. RX Power Supply CONV ZUS 0 PBBA 0 B VIN+ +V +v R7 uh FL C7 00uF C 70uF C 70uF FL DB DB0 F VIN- -V R7 7 +9V +9v F I R7 FL -.V -.V L +9V +V +V uh CONV NMA0S C7 uf I +V R L uh 0R C 00uF C 00nF D NB C 00uF C 00nF R 0R L uh U8 LM7LZ O Adj R 0R L C 0uF C 0nF C 0nF +V uh C0 D C 0uF D C C9 0nF C8 0nF C8 uf R K C 0uF C 0nF C 0nF -V L uh U9 LM7LZ -.V O -V Adj C9 uf R 0R COPYRIGHT DO NOT COPY NOR DISCLOSE TO ANY THIRD PARTY WITHOUT WRITTEN CONSENT DRAWN K.N. C0 uf R 70R CHECKED ENG. APP Revision: -Nov-00 Date: ECR --0 ECR8