IRT Eurocard Types. (/xxx = /APC or /PC) DANGER. Invisible LASER radiation- Avoid direct exposure to beam. Class 1 LASER Product

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1 I R T Electronics Pty Ltd A.B.N. 000 Hotham Parade, ARTARMON N.S.W. 0 AUSTRALIA National: Phone: (0) 99 Fax: (0) 99 9 International: sales@irtelectronics.com Web: IRT Eurocard Types DVT-0/xxx, DVT-/xxx Serial Digital Fibre Optic LASER Transmitters & DVR-0/xxx Reclocking Serial Digital Fibre Optic Receiver (/xxx = /APC or /PC) DANGER Invisible LASER radiation- Avoid direct exposure to beam Peak power mw Wavelength 00 nm Class LASER Product Designed and manufactured in Australia IRT can be found on the Internet at: 0-dvt, -dvt & 0-dvr.ib.doc Page of /0/00

2 DVT-0/xxx, DVT-/xxx & DVR-0/xxx Serial Digital Fibre Optic Link (/xxx = /APC or /PC) Instruction Manual Table of Contents Section Page Operational safety Description Applications Specifications Cicuit description DVT-0 / DVT- DVR-0 Pre-installation Installation Front & rear panel diagrams 9 Maintenance 0 Warranty and service 0 Equipment return 0 Drawing list index This instruction book applies to units later than S/N dvt, -dvt & 0-dvr.ib.doc Page of /0/00

3 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. Optical Safety The light emitted from the LASER diode used in this system is invisible and may be harmful to the human eye. Avoid looking directly into the fibre optic cable or connectors or into the collimated beam along their axis when the device is in operation. Operating the LASER diode outside of its maximum ratings may cause device failure or a safety hazard. DANGER Invisible LASER radiation- Avoid direct exposure to beam Peak power mw Wavelength 00 nm Class LASER Product 0-dvt, -dvt & 0-dvr.ib.doc Page of /0/00

4 Description The IRT DVT-0/xxx and DVR-0/xxx are transmit and receive modules designed principally for use as a 0 Mb/s SMPTE/EBU serial digital video Fibre Optic transmission link, using 9/ single mode fibre for optical transmission circuits with path attenuation of 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 suffix /xxx designates the type of connector fitted - /APC for angled faced connector or /PC for flat faced connector. For ease of explanation the suffix /xxx will be dropped from further reference to the model numbers within this handbook. The DVT-0 transmitter features an input circuit with automatic cable equalisation for Belden or PFS/ coaxial cable followed by a 00nm LASER transmitter. The DVT- transmitter is the same as the DVT-0 module except that it uses an db higher output powered laser for use where longer or lossier paths are used. The DVR-0 receiver uses a PIN photodiode detector pre-amp module, signal conditioning and a reclocking circuit with automatic data rate selection of Mb/s, Mb/s, 0 Mb/s and 0 Mb/s. Two serial digital outputs are provided from the transmission link. Digital signal presence detector circuits in the transmitter and receiver provide a LED (signal) indication on the front panel of each unit, as well as a relay contact output for remote indication of the presence or absence of the serial digital signal. Power supply monitoring is provided by front panel LED (DC) indicators as well as relay contact outputs for remote indication. On the DVT-0, a LED (laser) indicator as well as a relay contact output for remote indication, will indicate failure of the laser operation. Test points on the front panel of the DVR-0 provide an indication of the received optical signal level, with a LED (optical) indicator as well as a relay contact output for remote indication, to indicate loss of optical signal. The DVT-0, DVT- and DVR-0 are built in U extended Eurocard (0 mm x 00 mm) modules designed to mount in the IRT RU and RU family of Eurocard frames. The fibre and video connections are made to the rear of the module, with the fibre connectors directly mounted on the rear of the modules and the video and alarm connections via a rear connector panel. Applications The DVT-0/DVR-0 Serial Digital Fibre Optic transmission system is intended to be used where reliable signal transmission is required over distances greater than 00 metres, or where the space saving and immunity to electromagnetic interference of optical fibre is required. The low cost of fibre verses Belden or equivalent coaxial cable makes fibre more economical that cable over distances greater than 00 metres especially when bundled fibres can be used to carry, multiple signals between the locations. A total of up to modules can be mounted in a RU 9 rack chassis, or a mix with other digital video distribution modules in the IRT Eurocard range. 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 link length of 0-0 km. The DVT-0/DVR-0 is designed to work reliably over the full 0 to db optical path range. For shorter distance link lengths./ multimode fibre can be used as limited by it s bandwidth of 00 MHz/km 00nm for this type of cable, giving a typical link length of km. 0-dvt, -dvt & 0-dvr.ib.doc Page of /0/00

5 DVR-0/DVT-0/DVT- Technical Specifications System performance DVR-0 - Receiver Video outputs x ASI/SDI, 0.V ± 0%. Receiver reclocking Output rise time Residual jitter Connectors DVT-0/DVT- - Transmitters Signal input Cable compensation Connector Ω > db return loss to 0 MHz. Factory set for 0 Mb/s operation. 0 Mb/s data rate available at time of ordering. (Other data rates available on request). <.0 ns, (00 ps typically). <00 ps at 0 Mb/s. BNC on rear panel. SMPTE/EBU,, 0 or 0 Mb/s serial data (SDI or ASI). Ω > db return loss to 0 MHz. Automatic, better than 0 metres at 0 Mb/s for Belden or equivalent cable. BNC on rear panel. Optical Optical path loss Optical fibre Optical wavelength Spectral width Optical connectors DVR-0 optical input DVT-0 optical output DVT- optical output Power requirements: Voltage Consumption db maximum. Designed for use with 9/ single mode fibre. 0 nm ± 0 nm. nm typically. SC/APC on bracket attached to module. (Specify on ordering. Other optical connector types available upon request). 00 nm PIN detector, - to - dbm input level. 00 nm LASER emitter, - dbm typically. 00 nm LASER emitter, 0 dbm typically. Vac CT (-0-) or ± Vdc. DVR-0. VA, DVT-0. VA, DVT-.VA. Indicators on DVR-0 and DVT-0/DVT-: Power Serial digital signal present Optical output fail Optical signal level Alarm outputs General: Operating temperature Mechanical Size Weight Front panel Rear assembly LED (green) for +V. LED (green) for signal present. LED (red) on DVT-0/DVT- panel Voltage test points on DVR-0 panel. Three relays energised in the normal condition to indicate loss of DC power, SDI signal or laser power out of range for the DVT-0 & DVT-, loss of DC power, optical signal or SDI signal for the DVR-0. Relay circuits are wired with contacts normally open (or closed) to ground as set by links on the circuit board. 0 to 0 C ambient. Suitable for mounting in IRT 9" rack chassis types with input, output and power connections to the rear. HP x U Extended Eurocard (0 mm x 00 mm). With rear assembly <0 gm for each module. Grey enamel, silk-screened black lettering & red IRT logo. Detachable silk-screened PCB with direct mount connectors to Eurocard and external signals. Due to our policy of continuing development these specifications are subject to change without notice. 0-dvt, -dvt & 0-dvr.ib.doc Page of /0/00

6 Circuit Description DVT-0 / DVT-: The serial digital input circuit consists of U a CLC0 adaptive cable equaliser IC, which automatically adapts to equalise any cable length from zero metres to 0 metres of Belden or equivalent cable. The carrier detect and output mute circuit of the CLC0 is used to mute the output when no signal is present. The CLC0 is insensitive to the pathological patterns that can be present in the serial digital video signal. The signal from the carrier detect circuit of U is inverted by Q to drive a SIGNAL present LED indicator LD on the front panel of the unit and to enable relay RL when signal is present. The contact of RL is wired to pin of both SK and SK on the rear panel. Connecting LK pins - sets the circuit so that when the input signal is present a ground is applied to SK pin. Connecting LK pins - sets the circuit so that when the input signal is not present a ground is applied to SK pin. The output of the CLC0 input stage is coupled to U the MAX laser driver. The laser driver circuitry incorporates average optical power feedback, which monitors and actively adjusts the laser for constant output power. The laser driver also provides an indication of laser failure at pin. The alarm signal at U/ is inverted by Q to drive a LASER fail LED indicator LD on the front panel and to enable relay RL when a fault is indicated. The contact of RL is wired to pin of both SK and SK on the rear panel. Connecting LK pins - sets the circuit so that when the laser fails a ground is applied to SK pin. Connecting LK pins - sets the circuit so that when the laser is operating correctly a ground is applied to SK pin. The dual AC inputs are rectified by D to D, and then regulated in CONV a switch mode regulator module to provide the operating voltage for the unit. A front panel DC LED indicator LD and relay RL are powered from the - volt supply to indicate the presence of DC power in the module. The contact of RL is wired to pin of both SK and SK on the rear panel. Connecting LK pins - sets the circuit so that when power is present a ground is applied to SK pin. Connecting LK pins - sets the circuit so that when the power fails a ground is applied to SK pin. 0-dvt, -dvt & 0-dvr.ib.doc Page of /0/00

7 Circuit Description DVR-0: The optical input signal is detected in a PIN photodiode and integral pre-amp module, the resulting electrical signal is amplified by U and U operating as a wideband limiter circuit with DC feedback stabilisation provided by U. RV is used to adjust the bias point of U to set the limiter operation at low signal levels. The output of the limiter stage is coupled to U a CLC0 data re-timing PLL set to operate at 0Mb/s. The carrier detect and mute circuit of U together with gating circuit U0 is used to mute the output when no signal is present. U has a low residual output jitter of less than 00 ps p-p at 0 Mb/s and is insensitive to the pathological patterns that can be present in the serial digital video signal. The output of the CLC0 re-timing stage is coupled to cable driver circuit, U a CLC00 to provide two isolated outputs from the DVR-0. U0D gates the carrier detect and search signals from U to provide a indication of the presence of locked signal, this signal is used to mute the output of U under no signal condition. U9 detects the PLL lock condition of U and will gate the output of U0C which feeds the alarm indicator circuit Q, RL. This output from U0C is used to power after inversion by Q a signal present LED indicator LD on the front panel, and to enable relay RL when signal is present. The contact of RL is wired to pin of both SK and SK on the rear panel. Connecting LK pins - sets the circuit so that when the input signal is present a ground is applied to SK pin. Connecting LK pins - sets the circuit so that when the input signal is not present a ground is applied to SK pin. Link LK can be used to disable the search signal from U to U0D/B the mute circuit, this will prevent muting of the output of U at very small signal levels (i.e. signals from greater than db link path attenuation). The current in the optical detector bias circuit is monitored by a difference amplifier circuit U, U. The output voltage of U, which is present at test point TP on the front panel, is an indication of the received signal strength and will vary from 0V for no signal to -V for maximum received signal from a DVT-0 Transmitter as set by RV on test with a direct fibre patch lead connecting the transmitter and receiver. The contact of RL is wired to pin of both SK and SK on the rear panel. Connecting LK pins - sets the circuit so that when there is insufficient optical input signal a ground is applied to SK pin. Connecting LK pins - sets the circuit so that when sufficient optical input signal a ground is applied to SK pin. The dual AC inputs are rectified by D to D, and then regulated in CONV a switch mode regulator module to provide the operating voltage for the unit. A further small converter module CONV is used to generate the + volts for the positive supply of U, and. A front panel DC LED indicator LD and relay RL are powered from the - volt supply to indicate the presence of DC power in the module. The contact of RL is wired to pin of both SK and SK on the rear panel. Connecting LK pins - sets the circuit so that when power is present a ground is applied to SK pin. Connecting LK pins - sets the circuit so that when the power fails a ground is applied to SK pin. 0-dvt, -dvt & 0-dvr.ib.doc Page of /0/00

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: 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. Earthing: 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. Installation The DVT-0, DVT- and DVR-0 are set up to operate at 0 MB/s and do not require any adjustment prior to use. There are no external controls on the front panel of the units. For 0 MB/s operation the alarm on the PLL lock indicator circuit will need to be set for 0 MB/s detection by moving LK to the 0 position. Link LK if closed will decrease the sensitivity of the U output mute circuit, the default is open. Optical connections are made to the panel adapter mounted on a bracket at the rear of the modules. Care must be taken to provide a clean surface on the optical connectors and in inserting the plug on the external fibre to prevent damage to the alignment ferrule of the panel adapter. The serial digital signal connections are made to the BNC connectors on the rear panel. The external alarm contact connections are made to the pin parallel wired connectors at the bottom of the rear panel. The connections are: DVT-0 SK/ pin ground DVT- pin digital signal fail pin laser fail pin dc power fail DVR-0 SK/ pin ground pin digital signal fail pin optical signal fail pin dc power fail The presence of the internal DC supply voltage is indicated by the front panel DC LED (green). 0-dvt, -dvt & 0-dvr.ib.doc Page of /0/00

9 Front & rear panel diagrams The following front panel and rear assembly drawings are not to scale and are intended to show relative positions of connectors, indicators and controls only. DVT-0 DVT- DVR-0 DVT- SK DVR-0 O/P INPUT O/P OPTICAL + - LEVEL LASER SIGNAL DC CAUTION Direct connections to module LASER SIGNAL DC CAUTION Direct connections to module DC OPTICAL SIGNAL CAUTION Direct connections to module SK SK SK SK N0 N0 N0 0-dvt, -dvt & 0-dvr.ib.doc Page 9 of /0/00

10 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 $A0.00 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.. For situations when No Fault Found for repairs, a minimum charge of $A0.00 will apply, whether the equipment is within the warranty period or not. 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 Fax: service@irtelectronics.com 0-dvt, -dvt & 0-dvr.ib.doc Page 0 of /0/00

11 Drawing List Index Drawing # Sheet # Description 000 DVT-0 serial digital fibre optic transmitter schematic diagram. 000 DVT-0 serial digital fibre optic transmitter schematic diagram. 00 DVR-0 serial digital fibre optic receiver schematic diagram. 00 DVR-0 serial digital fibre optic receiver schematic diagram. 00 DVT- serial digital fibre optic transmitter schematic diagram. 00 DVT- serial digital fibre optic transmitter schematic diagram. 0-dvt, -dvt & 0-dvr.ib.doc Page of /0/00

12 SD IN (J/P) a,b LK RL/ a,b a,b a,b SDI INPUT AND LASER DRIVER a,b SD IN a,b a,b a,b 9a,b 0a,b a,b a,b a,b a,b a,b a,b a,b a,b a 9a,b 0a,b a,b a,b 000s.sch a,b F R a,b F R D0 LS a,b a,b D a,b F R D D RL/ 0 D LS COPYRIGHT DO NOT COPY NOR DISCLOSE TO ANY THIRD PARTY WITHOUT WRITTEN CONSENT DRAWN K.N. CHECKED ENG. APP. Revision: Date: 0-Aug-00 FL F a,b R D N00 Relay contacts shown NOT ENERGISED b RL/ D LS 0 J/RA optional power in on rear panel (used when fitted to FR- or FRU-00 frame). PCB 00 CD LASER FAIL GND SIGNAL PRESENT LASER FAIL DC POWER (P/J) a b 9a 9b SK/ ALARM CIRCUITS GND. SIGNAL FAIL LASER FAIL DC POWER FAIL 0a 0b SIZE Title A DVT-0 0 Mb/s OPTICAL TX SCALE Sheet Drawing No. 000si N.T.S. of IRT Electronics Pty. Ltd. ARTARMON NSW AUSTRALIA 0 RL V0 SK RL V0 ZD N C 00uF SK/RA SK/RA 0 LK LK ECR ECR9 J/RA RL V0 LD LDGRN LD LDRD LD LDGRN FL D D FL FL FL C 00nF R R R R C 00uF L uh C 00uF L uh C 00uF L uh R 0 R 0 C R9 u 0 R/RA L/RA D D N00 ZUSR0 VIN+ VIN- +V -V C0 00uF C9 00uF N.C.

13 TO RL CD U VCC DO VCC DO NOTE: ALL CAPACITORS ARE 0nF (00) - OEM MUTE VCC VEE CD VEE C 00nF AEC+ DI AEC- DI C 00pF CLC0AJE SDI IN A L.uH C u 0 9 R R D9 LS C0 00nF L.uH L.uH C u RV K Q BC0 LASER FAIL TO RL GND A COPYRIGHT DO NOT COPY NOR DISCLOSE TO ANY THIRD PARTY WITHOUT WRITTEN CONSENT DRAWN K.N. CHECKED ENG. APP. Revision: Date: 0-Aug-00 SIZE Title A DVT-0 0 Mb/s OPTICAL TX SCALE Sheet Drawing No. 000si N.T.S. of IRT Electronics Pty. Ltd. ARTARMON NSW AUSTRALIA 0 0 TP TP VIN+ C L OUT+ 0uH R 0 OSADJ VEEA VEEA 9 IBFB VEEA IBSET IMSET VEEA IPSET 9 Q BCB 9 VCCB VCCB VCCB ENB+ VIN- ENB- SLWST VREF U MAXCCJ IPIN OUT- VCCA VCCA VCCA IBOUT FAILOUT VREF 0 R 00 R 0 R k RV K R9 K0 R0 K RV K C 0nF R K LASER FLDCLK R R C 0uF 00nF R R R 0 0K R0 K ECR ECR9 C 00nF R 0K R K C9 0nF C 0nF R R C uf R R C u - C C C C9 C0 00pF C uf R R C 0nF C C 00p 00p C 00nF C 0nF

14 SIZE Title A C DVR-0 0 Mb/s OPTICAL RX R u R n/c C n/c SD SD SD0 C SD0 R u CD GND C R n/c n/c V+ V+ +V SCALE Sheet Drawing No. 00 N.T.S. of IRT Electronics Pty. Ltd. ARTARMON NSW AUSTRALIA 0 R K C u LD LDGRN (CARRIER DETECT) - + TP OPTICAL SIGNAL LEVEL (DC) COPYRIGHT DO NOT COPY NOR DISCLOSE TO ANY THIRD PARTY WITHOUT WRITTEN CONSENT V + (OPTICAL LOW) [J/P] a,b a,b a,b a,b a,b a,b J/RA optional power in on rear panel (used when fitted to FR- or FRU-00 frame). PCB 00 LIMITER AND RECLOCKING CIRCUIT DET OUT +V 00s.sch +V NOTE: ALL CAPACITORS ARE 0nF (0) [P/J] a,b a,b a,b R/RA R L/RA SDI O/P'S SK a,b a,b a,b a,b a,b 9a,b 0a,b a,b a,b a,b a,b R L/RA SK a,b a,b a,b a 9a 0a a,b a,b 9a,b 0a,b a,b a,b b LK 9b LK 0b SK/ ALARM CIRCUITS GND. SIGNAL LOSS OPTICAL LOW DC POWER FAIL +V FIL F R F R F R F R D D Relay contacts shown NOT ENERGISED D D N00 D D D DRAWN K.N. CHECKED ENG. APP. Revision: Date: 0-Aug-00 D N00 FIL FIL FIL R R C C R R ZD N C uf Q BC0 C R0 0 C u R 0K D0 BAS RL C u LD LDGRN D BAS R 0 L uh L 0nH C C u C C0 u C 0uF C C 0uF L uh C u D C L D C uh C C0 C C C uf C uf C9 uf DET FRMZKT J/RA LK SK/RA SK/RA RL/ UA 0 V0 R9 0 LMM C C RL/ 0 u V0 RL RL/ 0 V0 NME0S CONV R K C R C9 K u R K LMM UB R 0K R 0K UB LMM R K % R0 0K % R9 0K % UA R K R K D DZ V RV 0K R K R K Q BC0 RL R K C 00uF C 00uF LD LDRED R 0 D BAS C u R9 R 0 R0 0K K C u C C RV 00R C RV K R0 0K C U LM R/RA L0 uh VIN+ +V VIN- CONV ZS0 L9 uh -V

15 C 0uF SIZE Title A DVR-0 0 Mb/s OPTICAL RX C SCALE Sheet Drawing No. 00 N.T.S. of IRT Electronics Pty. Ltd. ARTARMON NSW AUSTRALIA 0 L 0nH C u U CLC00AJE C9 C0 Q VEE Q IN- 00pF Q0 IN+ Q0 VCC LK 0 0 U9A HC00D U9C 9 0 COPYRIGHT DO NOT COPY NOR DISCLOSE TO ANY THIRD PARTY WITHOUT WRITTEN CONSENT DRAWN K.N. CHECKED ENG. APP. Revision: Date: 0-Aug ECR DET OUT C0 u C 00pF C C C u L 0nH C +V C 00nF R 0K R 0 C R MEG RV K NOTE: ALL CAPACITORS -VA -VA ARE 0nF (0) HC00D R K R 0 C C0 L 0nH u C9 U0C HC00D C C 00nF R9 K C nf L 0nH C C C u C0 C C 00nF C9 pf C C SD SD SD0 SD0 C D GND V+ V+ D9 BAS R R U CLC00AJE C 00nF UB LMM U MC0EL R0 0 % UA LMM R 00K R 0 R 0 C C9 LK C 00nF C 00nF DDI DDI SDO SDO SCO SCO U0A HC00D U0D HC00D U0B HC00D R R R R 9 0 0R 0R 00 0R U9D HC00D U9B VCC VCC 9 CD MUTE CARS SER U CLC0A R0 R R R ACQ/WR AUTO RTN RD RD0 0 JP n/c JP n/c 0 9 VEE VEE VEE VEE VC FD VC

16 (P/J) a b SDI IN PCB 00 (J/P) a,b a,b a,b a,b SDI INPUT AND LASER DRIVER COPYRIGHT a,b DO NOT COPY NOR DISCLOSE TO ANY THIRD PARTY WITHOUT WRITTEN CONSENT DRAWN K.N. CHECKED ENG. APP. Revision: Date: 0-Aug-00 SDI IN a,b a,b a,b 9a,b 0a,b a,b a,b a,b a,b a,b a,b a,b a,b a,b 9a,b 0a,b a,b a,b 00s.sch a,b FIL a,b a,b a,b a,b F a,b R FIL NOTE: ALL CAPACITORS SIGNAL PRESENT LASER FAIL DC POWER + IN OUT - + ARE 0nF (0) 9a 9b RL/ 0 F R 0a 0b D FIL J/RA optional power in on rear panel (used when fitted to FR- or FRU-00 frame). CD LASER FAIL GND A A A Relay contacts shown NOT ENERGISED CONV GND. SIGNAL FAIL LASER FAIL DC POWER FAIL SIZE Title A DVT- 0 Mb/s OPTICAL TX SCALE Sheet Drawing No. 00 N.T.S. of IRT Electronics Pty. Ltd. ARTARMON NSW AUSTRALIA 0 - F R D D N00 D FIL F R D D D N00 D BAS D BAS JP 0R0 RL/ 0 SK L/RA RL V0 RL V0 FIL ZD N SK/RA SK/RA RL/ 0 FIL D0 BAS J/RA D RL V0 LD LDGRN LD LDRD LD LDGRN L uh R R C C 00uF C C 00uF R R C0 0uF R 0 R 0 R9 0 C9 0uF LK LK LK ECR

17 TO RL CD C L 0nH u U VCC DO VCC DO OEM MUTE VCC VEE 0 CD VEE 9 AEC+ DI AEC- DI CLC0AJE SDI IN R R NOTE: ALL CAPACITORS C9 ARE 0nF (0) A C0 A C C LASER FAIL TO RL GND A COPYRIGHT DO NOT COPY NOR DISCLOSE TO ANY THIRD PARTY WITHOUT WRITTEN CONSENT DRAWN K.N. CHECKED ENG. APP. Revision: Date: 0-Aug-00 SIZE Title A DVT- 0 Mb/s OPTICAL TX SCALE Sheet Drawing No. 00 N.T.S. of IRT Electronics Pty. Ltd. ARTARMON NSW AUSTRALIA 0 D9 BAS 00nF L 0nH L 0nH C u RV K C Q BC0 0 VIN+ R R OUT+ 0 OSADJ VEEA VEEA 9 IBFB IBSET IMSET VEEA VEEA IPSET 9 9 VCCB VCCB VCCB ENB+ VIN- ENB- SLWST VREF U MAXCCJ IPIN OUT- VCCA VCCA VCCA IBOUT FAILOUT VREF 0 L 0uH Q BCB C C R 0K C 00nF C 00pF R K C0 0uF C R 00 R 0 C uf C uf C R R R R R k RV K R9 K0 R0 K0 RV K C 0nF R K R 0 R R0 K 0K C C u C C9 C C C 0uF R R R N/C TP TP C C 00nF uf LASER FLDCLK R R ECR