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Transmitter Functional Blocks

Chapter 9 - Theory of Operation

•

transducers and operating modes

•

fetal movement detection bit

•

battery status

•

external marker information

•

Nurse call button

•

INOP condition of ECG

•

CRC (checksum over one frame)

•

Special transmitter ID after power up (Japan only)

Oscillator

This circuitry produces the different clocks needed in the Transmitter. The
oscillator is crystal controlled and starts operation at power supply voltages as
low as 2V. This is necessary because the oscillator also drives the power
supply. To ensure a start up over the complete specified battery voltage range,
the oscillator must start at this low voltage. The clock freqencies are:

•

2 MHz for the mircocontroller

•

1 MHz for the ultrasound drive/receive clocks and the power supply.

•

500 kHz for the Toco sigma-delta A/D converter.

•

250 kHz for the ECG driver and the Toco sigma-delta A/D converter.

Power Supply

The power supply is a switched mode power supply with step up operation.
It works with a 250 kHz clock frequency (delivered by the oscillator) in a
pulse width modulation mode. It is capable of delivering the necessary power
in a fixed 5V output voltage for input voltages between 2.5V and 4.7V. (This
covers the input voltages delivered by three AA type alkaline batteries or three
AA type NiCd/NiHd accumulators).

Other supply voltages are derived from the 5V supply by linear regulators or
by charge pumps runing at 250 kHz.

•

2.5V as virtual ground (linear regulator)

•

8.5V for ultrasound preamplifier and OP-Amps (charge pump as
voltage doubler.)

•

-3.5V for OP-Amps (charge pumps as voltage inverter).

Service Interface

The service and production interface uses the marker input as the I/O
connector for settings and internal status readings for service and production
tests.

It is a RS232 similiar (0.5V only levels) serial interface with a specific
protocol. This interface is used for:

•

setting the Transmitter's serial number

•

reading some internal values for prodution tests

•

writing correction factors for the Toco frontend into the EEPROM.

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Содержание 50 T Series

Страница 1: ...Series 50 T M1310A Fetal Telemetry System S E R V I C E G U I D E M1310 9000B Printed in Germany February 2002 Edition 1 A 00 01 ...

Страница 2: ...turer Philips only considers itself responsible for any effects on safety reliability and performance of the equipment if assembly operations extensions re adjustments modifications or repairs are carried out by persons authorized by Philips and the electrical installation of the relevant room complies with national standards and the instrument is used in accordance with the Instructions for Use o...

Страница 3: ...ce tests Details can be found in Chapter 10 Preventive Maintenance Care and Cleaning For an overview of the system and how to set it up please refer to the Instructions for Use Conventional current technical terms are used throughout the manual and familiarity with these terms is assumed The following conventions for cautions and warnings are used in this guide Note A note calls attention to an im...

Страница 4: ......

Страница 5: ...and Cables 8 External Blue Toco Transducers M1355A or M1355A Opt C03 8 Blue Ultrasound Transducer M1356A or M1356 Opt C03 8 DECG Transducer M1357A 9 DECG MECG Patient Module M1364A 9 IUP Quartz Transducer 1290C J05 9 IUP Pressure Transducer CPJ840J5 10 Remote Event Marker 15249A 10 3 Tests and Error Messages 11 Testing the Receiver 11 Testing the Transmitter 12 Testing the Parameter Signals 13 Err...

Страница 6: ...nu 35 7 Replacing Parts 39 Ordering Parts 39 Service Tools 40 Lists of Parts 40 Transmitter 40 Receiver 42 Dismantling the Transmitter 46 Transmitter Processor Board 47 Transmitter VCXO 50 Dismantling the Receiver 51 Power Supply Board 53 Processor Board 54 RF Module 55 Receiver VCXO 56 RF Amplifier 57 Display Board 57 Fuses 58 8 RF Bench Repair 59 Introduction 59 What You Need 59 Transmitter VCXO...

Страница 7: ...put Filter 74 RF Preamp M1406A 74 RF Receiver M1402A 75 US Bandpass 75 ECG Bandpass 75 FSK Bandpass 75 FSK Demodulator 75 Toco D A Converter 76 EEPROM 76 Service Interface 76 Power Supply 76 Oscillator 76 10 Preventive Maintenance Care and Cleaning 77 Preventive Maintenance 77 Mechanical Inspection 77 Safety Tests 77 Performance Assurance Tests 77 Care and Cleaning of the Telemetry System 78 11 Ch...

Страница 8: ...viii Contents France 82 Germany 83 Italy 84 Japan 84 Luxembourg 85 Netherlands 85 New Zealand 86 Norway 86 Service USA 87 Singapore 87 Spain 87 Sweden 88 Switzerland 88 UK 89 USA 89 ...

Страница 9: ...roubleshooting Transducer not detected 24 Figure 7 Troubleshooting Cardio Channel 25 Figure 8 Troubleshooting TOCO Channel 26 Figure 9 Troubleshooting FMP 27 Figure 10 FMP Test 29 Figure 11 Troubleshooting Nurse Call 30 Figure 12 Cable assembly 33 Figure 13 Transmitter Parts 41 Figure 14 Receiver Boards 43 Figure 15 Receiver Parts 45 Figure 16 Transmitter VCXO Test 60 Figure 17 FSK Signal 61 Figur...

Страница 10: ...x List of Figures ...

Страница 11: ...aline NiCd rechargeable NiMH rechargeable Caution Remove the batteries if you do not intend to use the Transmitter for a long period of time to avoid damage from leakage This symbol indicates that you should consult the Instructions For Use and particularly any warning messages Equipotential Terminal This symbol identifies terminals which are connected together bringing various equipment or parts ...

Страница 12: ...ithin specifications at ambient temperatures between 0 and 45 C Ambient temperatures that exceed these limits can affect the accuracy of the system the transmitter radio frequency transmission and can damage the components and circuits The system not including transducers1 can be stored at ambient temperatures between 40 C and 75 C The blue Toco and Ultrasound transducers are water tight to a dept...

Страница 13: ...jury Whenever it is likely that the protection has been impaired the receiver must be made inoperative and be secured against any unintended operation Warning Check each time before use that the Telemetry System is in perfect working order and the receiver is properly grounded The patient cable must be positioned so that it does not come into contact with any other electrical equipment Before oper...

Страница 14: ...iver Rear View Transmitter 1 Service Socket Maximum voltage of 12V 2 Socket to Fetal Monitor Maximum voltage of 12V 3 Power Input Socket 100 120V or 220 240V 4 Event Marker Service Socket Maximum Voltage of 5V 5 Toco Socket Maximum Voltage of 5V 6 Cardio Socket Maximum Voltage of 5V ...

Страница 15: ...explosive gases extremes of temperature and humidity It operates within specifications at ambient temperatures between 0 and 45 C Ambient temperatures which exceed these limits can affect the accuracy of the Telemetry System the Transmitter radio frequency transmission and cause damage to the components and circuits Operating Temp 0 to 45 C 32 F to 113 F Storage Temp1 40 to 75 C 40 F to 167 F Rela...

Страница 16: ...nnection to an antenna system Transmitter Built in Antenna in US and DECG transducer cables Inputs Receiver Equipotential Grounding Point Service Socket Receiver Controls and Indicators Description Type Color Power On Off Switch Push Button Power On Light LED Green Nurse Call Acknowledge Volume Button Push Button Nurse Call Light LED Yellow Transmission INOP Light LED Yellow Battery Low Light LED ...

Страница 17: ...25 pin RS232 Socket for connecting the Fetal Monitor Input Sensitivity 118dBM Output Power Transmitter 4 mW USA 2 mW Europe 1 mW Japan Image Rejection 80 dB Self Test Facilities Self test facilities include Receiver Self Test Tests the Receiver LF Part Transmitter Self Test Tests the Transmitter LF Part Parameter Test With the appropriate transducer connected to the Transmitter the monitoring mode...

Страница 18: ...em Passive Straingauge Dynamic Range 0 to 12N overload protected Weight 180g 6 3oz Cable Length 2 5m 8ft 2in or 70cm 28in for Option C03 Water tight To a depth of 0 5 meters Blue Ultrasound Transducer M1356A or M1356 Opt C03 System Pulsed Doppler Oscillator Frequency 998 4kHz Weight 185g 6 5oz Cable Length 2 5m 8ft 2in or 70cm 28in for Option C03 Size 75mm 2 95in diameter Water tight To a depth of...

Страница 19: ...for Option C03 DECG MECG Patient Module M1364A The patient module has a7 pin ECG connector into which you can plug either DECG cable M1362A or M1362B or MECG cable Overall length 2706mm 30 100mm Length of free cable 2618mm 30 100mm Weight 120 grams Size 88x42x30mm Socket DECG or MECG connection A short cable version of the M1364A patient module with a 70 cm 28 inch cable is orderable as part numbe...

Страница 20: ...Max electrical excitation 15 V DC or AC Bridge resistance 1000 Ohms input and output Non linearity and hysteresis max 0 5 of full scale Zero balance max 0 15 mm Hg C Operating temperature range 10 to 50 C Storage temperature range 20 to 70 C Isolation resistance min 1000 MOhms Leakage current max 1 5µA at 250V 50 Hz Weight 24 grams without cable Connector Equipment specified Remote Event Marker 15...

Страница 21: ...ff button to switch the receiver on 3 When you switch on The receiver On light A comes on The nurse call light B and the battery low light D are lit for one second The transmission INOP light C lights and stays lit until the transmitter is switched on The telemetry lamp indicator on the fetal monitor lights indicating telemetry monitoring mode TELE is annotated on the fetal trace ...

Страница 22: ...A comes on showing the transmitter is on 3 Check the red light B situated behind the middle battery If the red light is lit for a few seconds and then goes out the self test is successfully complete the red light blinks or remains on after three seconds change the batteries If the fault continues there is a hardware error See troubleshooting flowcharts in Chapter 4 ...

Страница 23: ...or press the Nurse Call Button on the transmitter and switch on the transmitter simultaneously The test runs while the Nurse Call is pressed If the response is different see troubleshooting flowcharts Chapter 4 Signal Correct Monitor Response US 125 is displayed and printed Signal Quality Indicator is green Fetal heartbeat is heard from the loudspeaker Toco A triangle signal with an amplitude of 4...

Страница 24: ...ck the cable from the telemetry receiver and if necessary replace it Err 14 US Toco Incorrect transducer connected to transmitter Check that the transducer is compatible with Series 50T Fetal Telemetry System Err 16 US Toco Transducers are connected to the front panel of the monitor Disconnect the transducers from the monitor or switch off the telemetry receiver Message Display Cause Solution Err ...

Страница 25: ...nected into transmitter Only Ultrasound and Toco transducers can be used Transducers are connected to the front panel of the monitor Check the cable from the telemetry receiver and if necessary replace it Check that the transducer is compatible with Series 50T Fetal Telemetry System Disconnect the transducers from the monitor or switch off the telemetry receiver No longer available ...

Страница 26: ...Error Messages Chapter 3 Tests and Error Messages ...

Страница 27: ... Replace interface cable Receiver Power On Light does not light when the receiver is switched on Power cable not plugged into the power supply Fuses need replacing Plug in and switch on Replace fuses Transmission INOP light on the receiver is still lit when the transmitter is switched on Receiver and transmitter do not have the same channel or serial number Batteries in the transmitter are exhaust...

Страница 28: ...re US TOCO DECG TOCO DECG IUP After Low LIght Comes On Operating Time After Low Light Comes On Operating Time After Low Light Comes On Operating Time Alkaline 1 8 Ah 180 min 40 hrs 100 min 16 hrs 80 min 14 5 hrs NiCd 0 6 Ah Rechargeable 10 min 12 hrs 6 min 5 5 hrs 5 min 4 5 hrs NiMH 1 2 Ah Rechargeable 20 min 22 hrs 12 min 11 hrs 10 min 9 hrs ...

Страница 29: ...Solving General Problems Chapter 4 Troubleshooting No LEDs Lit on Receiver continued overleaf Figure 1 Troubleshooting No LED s Lit on Receiver ...

Страница 30: ...Solving General Problems Chapter 4 Troubleshooting Figure 1 Troubleshooting No LED s Lit on Receiver continued from previous page ...

Страница 31: ...Solving General Problems Chapter 4 Troubleshooting Not all Receiver LEDs are Lit Figure 2 Troubleshooting Receiver LEDs Yellow LED Remains Lit Figure 3 Troubleshooting Yellow LED stays on ...

Страница 32: ...Solving General Problems Chapter 4 Troubleshooting Transmission INOP Range Figure 4 Troubleshooting Transmission INOP ...

Страница 33: ...Solving General Problems Chapter 4 Troubleshooting Transmission Range Figure 5 Troubleshooting Transmission Range ...

Страница 34: ...Solving General Problems Chapter 4 Troubleshooting Transducer Mode Not Detected Figure 6 Troubleshooting Transducer not detected ...

Страница 35: ...Cardio Channel Chapter 4 Troubleshooting Cardio Channel Figure 7 Troubleshooting Cardio Channel ...

Страница 36: ...TOCO Channel Chapter 4 Troubleshooting TOCO Channel Figure 8 Troubleshooting TOCO Channel ...

Страница 37: ...r 1 Connect the telemetry receiver to the fetal monitor using the interface cable 2 Switch on the fetal monitor its recorder and the telemetry receiver 3 Connect the transducer to the ultrasound socket 4 Switch on the transmitter 5 Increase the loudspeaker volume on the fetal monitor to an audible level ...

Страница 38: ...bleshooting 6 Apply a small amount of gel on the transducer surface Holding the transducer in one hand gently tap the transducer surface with your finger 7 You should hear a noise from the loudspeaker Figure 10 FMP Test ...

Страница 39: ...Event Marker Chapter 4 Troubleshooting Event Marker Figure 11 Troubleshooting Event Marker ...

Страница 40: ...Nurse Call Chapter 4 Troubleshooting Nurse Call Figure 12 Troubleshooting Nurse Call ...

Страница 41: ... Not connected 2 Not connected 3 Not connected 4 Not connected 5 nTELEon Receiver on L 6 Not connected 7 nINOP DECG inop L 8 nDECG DECG Mode L 9 Not connected 10 nUS US Mode L 11 Not connected 12 nIUP IUP Mode L 13 nTOCO TOCO External Mode L 14 HR US LF or ECG Signal 15 TOCO TOCO IUP signal 16 Not connected 17 Gnd Analog Analog Ground 18 Gnd 19 nMarker Tele Marker on L 20 nFMPon Tele FMP on L if F...

Страница 42: ... Chapter 5 Interfacing to a Fetal Monitor ...

Страница 43: ...latest service software for the M1310A is available from your Medical Response Center A cable assembly is needed to connect a PC to the Series 50 T Fetal Telemetry System This is the same cable that is used to configure the Series 50 Fetal Monitors You can obtain the cable assembly by ordering M1360A 61675 Figure 13 Cable assembly ...

Страница 44: ...s the program and uses COM2 Note If you have problems running the program in WINDOWS exit WINDOWS and run the program in DOS Some communications programs like llremote can cause problems to start tweetsrv exe In this case disconnect to release COM port or exit WINDOWS Run tweetsrv exe You can add for HELP how to run 1 for COM1 default 2 for COM2 3 for COM3 4 for COM4 Example tweetsrv exe 2 ...

Страница 45: ...played an error message is displayed along the bottom of the screen Main Menu M1310A Service Software Rev A xx xx MAIN MENU _ Program S N to Transmitter _ Program S N to Receiver _ Power On Selftest _ Show last errors warnings _ Check Transmitter _ Check Receiver _ Read SerNum and Revisions _ Reset Serial Number _ Read country information _ EXIT Select with cursor keys up down enter ...

Страница 46: ...d Follow the steps as the program requests When moving the service connector from one device to the other a SIO RCV error may be displayed This is due to the PC s serial interface circuitry and can be ignored If a Serial Number needs to be RESET contact factory Technical Marketing Engineer to get RESET CODE to RESET the Serial Number Power On Selftest The PC acts as a Terminal The Transmitter or R...

Страница 47: ...r is needed The Technical Marketing Engineer requires the following information Serial Number S N Transmitter OR Receiver Reason for RESET request The Technical Marketing Engineer will provide you with The RESET CODE Caution Never erase the Serial Number from both the transmitter and the receiver as this status is not recoverable and requires factory assistance Read country information Displays th...

Страница 48: ...Using the Service Program Chapter 6 Using the Service Software ...

Страница 49: ...e touching any circuit board or its associated components Ordering Parts To order a part contact your local Philips Sales Service Office quoting the part number listed in the tables To order a part not listed in the tables give the following information The model number of the Telemetry System The complete serial number of the Telemetry System A description of the part including its function and l...

Страница 50: ...r tweezers useful but not essential Lists of Parts Transmitter Transmitter Parts List Item Description Part Number 1 Transmitter PC Board M1310 69501 1 Transmitter PC Board Singapore M1310 66531 1 Transmitter PC Board Japan M1310 66521 2 Transmitter VCXO 2mW M1400 61xxx 2 Transmitter VCXO 4mW M1400 62xxx 2 Transmitter VCXO 1mW M1400 63xxx 3 Transmitter Housing Kit M1310 64100 4 Screw HILO 0624 076...

Страница 51: ...Lists of Parts Chapter 7 Replacing Parts Figure 14 Transmitter Parts ...

Страница 52: ...d Assy NEW 430 440MHz M1402 60304 5 Receiver Bd Assy EXCH 430 440MHz M1402 68304 5 Receiver Bd Assy NEW 440 450MHz M1402 60305 5 Receiver Bd Assy EXCH 440 450MHz M1402 68305 5 Receiver Bd Assy NEW 450 460MHz M1402 60306 5 Receiver Bd Assy EXCH 450 460MHz M1402 68306 5 Receiver Bd Assy NEW 460 470MHz M1402 60307 5 Receiver Bd Assy EXCH 460 470MHz M1402 68307 5 Receiver Bd Assy NEW 470 480MHz M1402 ...

Страница 53: ...Lists of Parts Chapter 7 Replacing Parts Figure 15 Receiver Boards ...

Страница 54: ... 1250 0076 5 Power SW Manipulator 5040 9317 6 Power SW Knob 5040 1203 7 Receiver Housing Kit M1310 64551 8 Fuse T300mA UL 2110 0044 8 Fuse L125 IEC 2110 0488 9 Fuse Holder Cap UL 2110 0565 9 Fuse Holder Cap IEC 2110 0567 10 Ground Pin 1251 5964 11 Washer 2190 0676 12 Plastic Plug for Receiver Top 6960 0016 Foot for Receiver Housing not shown 5041 4264 IF Cable to Fetal Monitor not shown M1310 6160...

Страница 55: ...Lists of Parts Chapter 7 Replacing Parts Figure 16 Receiver Parts Transducers HVFULSWLRQ 3DUW 1XPEHU Toco with 70cm Cable M1355 69013 US with 70cm Cable M1356 69013 DECG with 70cm Cable M1364 60003 ...

Страница 56: ...move the batteries from the battery compartment 2 Turn the transmitter upside down and using a small crosshead screwdriver undo the screw Removing screw on Transmitter Housing 3 Turn the transmitter over and lift off the top of the transmitter housing Removing Top of Transmitter Housing ...

Страница 57: ...ctions for dismantling the transmitter then 1 Remove the complete assembly from housing by lifting it out from the cardio connector side first Lifting out Assembly 2 With your hand apply gentle upward pressure in a rocking motion to seperate the top board from the bottom board 3 Remove the Cardio and Toco socket rings A Separating the Boards ...

Страница 58: ...itive components which can be easily damaged Removing the VCXO 5 To fit the replacement part angle the new VCXO and locate its pins in one side of the socket Holding the board in your hand carefully seat the VCXO until it is securely in position Excessive pressure exerted onto the lower board may damage delecate components Replacing the VCXO 6 Holding the lower board in your hand reconnect the top...

Страница 59: ...ace the top part of the housing and snap the 2 parts together 12 Check On Off switch mechanism is in the O off position 13 Screw together carefully do not fully tighten 14 Replace the batteries 15 Switch on and ensure that the green On LED is lit Also check the red LED inside the battery compartment by lifting the battery cover the red LED is situated behind the middle battery 16 Use the service s...

Страница 60: ...t of the board This task must be done carefully as excessive pressure exerted upon the board may damage delicate components 6 See Chapter 8 for details of RF Bench Repair Test Removing the VCXO When the replacment VCXO is received 1 To fit the replacement part angle the new VCXO and locate its pins in one side of the socket Holding the board in your hand carefully seat the VCXO applying gentle pre...

Страница 61: ...not press hard 8 Replace the batteries 9 Switch on and ensure that the green On LED is lit Also check the red LED inside the battery compartment situated behind the middle battery by lifting the battery cover Dismantling the Receiver To dismantle the Receiver 1 Turn the Receiver off and disconnect from power supply 2 Remove antenna 3 Remove 4 screws A 4 Slide top cover from back to front until it ...

Страница 62: ...Dismantling the Receiver Chapter 7 Replacing Parts Dismantling the Receiver Note Cases with spacers are not interchangable with those earlier models that do not have them fitted ...

Страница 63: ... then 1 Remove power switch manipulator A 2 Remove flat cable from processor board B 3 Remove 7 screws C 4 Remove ground cable Keep the ground cable screw washer in a safe place D 5 Lift clear of the housing Removing the Power Supply Board To replace the Power Supply Board 1 Put power supply board into place 2 Attach the power supply board with the 8 screws ...

Страница 64: ...o remove the Processor Board first follow the instructions for dismantling the Receiver then Removing the Processor Board 1 Remove the flat cable to the Power Supply Board A 2 Remove the cable to the Front Panel Board B 3 Remove the flat cable connector C 4 Using a M6 spanner remove the coax cable D 5 Using a M5 spanner remove the 2 hexagonal screws E at the 25 pin D type connector See next pictur...

Страница 65: ...lace the 2 hexagonal screws E at back of monitor screwing them in tightly 3 Tighten the 4 screws so the Processor board is held firmly 4 Reconnect and tighten the coax cable with M6 spanner 5 Reconnect all cables RF Module To remove the RF Module first follow the instructions for dismantling the Receiver then 1 Disconnect the flat cable B 2 Remove the coax cable from the Receiver Board Assembly wi...

Страница 66: ...ssembly To replace the RF Module reverse the above procedure For details of the RF Bench Repair see Chapter 8 Receiver VCXO 1 Remove the 7 screws on the underside of the Receiver Board Assembly and remove the cover Opening the RF Module Cover 2 Using a small flat bladed screw driver carefully prise the VCXO off the Receiver Board Assembly ...

Страница 67: ...ier first follow the instructions for dismantling the Receiver then 1 Remove the 3 screws that hold the RF Amplifier Board 2 Disconnect the coax cables 3 Lift the RF Amplifier clear of the casing To replace the RF Amplifier reverse the above procedure Display Board To remove the Display Board first follow the instructions for dismantling the Receiver then 1 Remove the small flat cable from the Dis...

Страница 68: ...fuses 1 Switch off the Receiver and disconnect it from the main power supply 2 Using a flat blade screwdriver turn the fuse cover A anti clockwise 3 Pull out the fuse holder and fuse 4 Remove the fuse from the holder and replace it with another of the correct value 5 Slide the holder and fuse back into place 6 Using a flat bladed screwdriver press in the fuse cover and simultaneously turn the cove...

Страница 69: ...You Need The following equipment is required to perform the test and repair The goal of the RF Bench Test is to find out which of the following sections is defective Transmitter VCXO M1400 6xxxx Receiver Preamplifier Board M1406 60560 Receiver Assembly M1402 6x30x Receiver VCXO M1402 61xxx If the operating range is decreased or no transmission is possible the following tests given in this chapter ...

Страница 70: ...ansmitter Board Assembly from the bottom housing 4 Place the Transmitter Board Assembly into housing top again and load the batteries Ensure the power switch manipulator is in the off position 5 Switch on the Transmitter Note Ensure that no Transducers are connected to the Cardio or Toco Sockets 6 Connect an Oscilloscope 1 MOhms input impedance 7 Ground to the marked ground point and the probe to ...

Страница 71: ... Bandwidth 100 kHz Video Bandwidth 100 kHz Reference Level 10 dBm Test Point Correct Signal Action If Signal Incorrect 1 2 5V DC Replace Transmitter Board 1 2 2 5V DC overlayed a sine 0 5 to 1Vpp FSK signal 1 6kHz 2 4kHz See Figure 18 Replace Transmitter Board 1 3 5V DC Replace Transmitter Board 1 1 Do not forget to program the Serial Number to the Transmitter Board using the Service Software With...

Страница 72: ...lows CENTER frequency The channel frequency of the Transmitter Frequency Span 50 kHz Resolution Bandwidth 300 Hz Video Bandwidth 300 Hz Reference Level 10 dBm Test Point Correct Signal Action if signal incorrect 4 Peak Level 6dBm Replace Transmitter VCXO Test Point Correct Signal Action if signal incorrect 5 Peak Level 12dBm Replace Transmitter Processor board 501 ...

Страница 73: ...Transmitter VCXO Test Chapter 8 RF Bench Repair Figure 20 RF Modulation Signal 7HVW 3RLQW RUUHFW 6LJQDO FWLRQ LI VLJQDO LQFRUUHFW 4 Seee Figure 20 Replace Transmitter VCXO ...

Страница 74: ...e BNC cable between the Preamplifier and the Receiver assembly at the Preamplifier BNC connector 4 Switch on the Receiver The green LED on the Preamplifier Board should be lit 5 Connect the RF Generator output to the Receiver s antenna input with a BNC cable Figure 21 Receiver Preamplifier Test 6 Set the following on the Signal Generator Frequency 450 MHz Level 40 dBm ...

Страница 75: ... measurement is correct complete Receiver Assembly Test 8 Remove the BNC connector from the Preamplifier input and connect this cable to the Spectrum Analyzer The Spectrum Analyser measurement must be Frequency 450 MHz Level 46 dBm 9 If this measurement is correct replace the Preamplifier Board If this measurement is not correct replace the Coax cable If this does not solve the problem replace the...

Страница 76: ...est Receiver VCXO 6 If all voltages are correct and the green LED is not flickering replace the Receiver Assembly Check for processor part number higher than or equal to 1821 1141 on the Receiver Assembly If any voltage is incorrect replace the flat cable If the problem is still not solved replace Receiver Processor Board 503 Receiver VCXO Test You require a Spectrum Analyzer and Active Probe to c...

Страница 77: ...MHz STOP frequency 500 MHz Resolution Bandwidth 100 kHz Video Bandwidth 100 kHz Reverence Level 10 dBm The Spectrum Analyser measurement must be Frequency Channel Frequency 21 400 MHz 5kHz Level 6 dBm 2 If the level is lower the Receiver VCXO is to be replaced If the frequency and level are correct the Receiver Assembly needs to be replaced ...

Страница 78: ...Receiver VCXO Test Chapter 8 RF Bench Repair ...

Страница 79: ...ec This timing gives a sensitive depth range from 2 4cm up to 16 8cm with a sound velocity in human tissue of 1500 m sec US Driver The US Driver circuitry drives the ultrasound transducer crystals with the bursts delivered by the US Gating module The output amplitude is 4V peak to peak The drivers output goes to a high impedance state when the driving burst is inactive US Receiver The US Receiver ...

Страница 80: ...ier with a programmable gain factor between 0 dB and 40 dB in 255 steps It adapts the high dynamic range 60 dB of the heartrate signals to the limited dynamic range of the RF link The PGA is controlled by the Automatic Gain Control The AGC circuitry sets the gain of the PGA to get the best usage of the RF link dynamic range The actual heartrate singal amplitude is measured by a peak hold detector ...

Страница 81: ...he doppler ultrasound circuitries to avoid interference between the Toco and ultrasound channels Toco Receiver This module contains a differential intput amplifier a synchronous demodulator and a low pass filter to derive a pressure proportional signal from the TOCO IUP transducers bridge Toco A D The TOCO IUP pressure signal is A to D converted by a sigma delta type converter with a resolution of...

Страница 82: ...pply is a switched mode power supply with step up operation It works with a 250 kHz clock frequency delivered by the oscillator in a pulse width modulation mode It is capable of delivering the necessary power in a fixed 5V output voltage for input voltages between 2 5V and 4 7V This covers the input voltages delivered by three AA type alkaline batteries or three AA type NiCd NiHd accumulators Othe...

Страница 83: ...stal Oscillator is a MAGIC M1400 6XXXX type VCXO It generates the 4mW 2mW or 1mW RF carrier in the 406 to 470 MHz band This is dependant on county options 4 mW for USA and Australia 2 mW for Europe 1 mw for Japan It also performs the FM modulation for this carrier with the composite signal of the ultasound doppler or the fetal scalp ECG and the FSK subcarrier for the digital information The heart ...

Страница 84: ...with strong lower frequency signals The filter also provides the preamplifier with a 21V DC power by coupling this DC voltage into the hot wire of the preamplifiers input cable A capacitor decouples the DC power from the antenna input RF Preamp M1406A This MAGIC line amplifier boosts the input signal by 12 dB This results in an input sensitivity of about 118 dBm together with the M1402A RF Receive...

Страница 85: ...CG bandpass is selected by the decoded mode information by the FSK Demodulator and fed to the receiver output as heartrate output If the input signal quality is too bad bit error rate increase over a certain limit the heartrate and Toco output is switched off FSK Bandpass This bandpass selects the FSK subcarrier out of the composite signal It consists of a 1 6 KHz highpass to remove the low freque...

Страница 86: ... marker will be output as a digital mode output only EEPROM The EEPROM keeps the following settings Serial Number Nurse Call volume control These values all can be set via the Service Production interface or in the case of the nurse call volume control by pressing the nurse call acknowledge button if no nurse call is active Service Interface This is a RS232 type serial interface used for servicing...

Страница 87: ...stimated time to complete each one is given in the following table Mechanical Inspection To carry out a mechanical inspection of the Receiver Make sure all exposed screws are tight Make sure the boards and connectors are firmly in place Check the external cables for splits cracks or signs of twisting Replace any cables that show serious damage Safety Tests Complete the safety tests in accordance w...

Страница 88: ...and Cleaning of the Telemetry System Chapter 10 Preventive Maintenance Care and Cleaning Care and Cleaning of the Telemetry System For care and cleaning instructions please refer to the Instructions for Use ...

Страница 89: ...03 449 850 M1400 61803 M1402 61803 J04 804 449 825 M1400 61804 M1402 61804 M1310A Option Ref M1402A Channel Frequency MHz Transmitter VCXO P N Receiver VCXO PN A10 510 469 500 M1400 61510 M1402 61510 A11 511 469 525 M1400 61511 M1402 61511 A12 512 469 550 M1400 61512 M1402 61512 A13 513 469 575 M1400 61513 M1402 61513 A14 514 469 600 M1400 61514 M1402 61514 A15 515 469 625 M1400 61515 M1402 61515 ...

Страница 90: ...6 2375 M1400 61393 M1402 61393 D05 605 448 250 M1400 61605 M1402 61605 D06 606 448 275 M1400 61606 M1402 61606 D08 608 448 125 M1400 61608 M1402 61608 D09 609 448 150 M1400 61609 M1402 61609 D10 610 448 175 M1400 61610 M1402 61610 D11 611 448 200 M1400 61611 M1402 61611 D12 612 448 225 M1400 61612 M1402 61612 M1310A Option Ref M1402A Channel Frequency MHz Transmitter VCXO P N Receiver VCXO PN J01 ...

Страница 91: ...000 M1400 61601 M1402 61601 D02 602 448 025 M1400 61602 M1402 61602 D03 603 448 075 M1400 61703 M1402 61603 D04 604 448 100 M1400 61604 M1402 61604 D05 605 448 250 M1400 61605 M1402 61605 D06 606 448 275 M1400 61606 M1402 61606 D07 607 448 050 M1400 61607 M1402 61607 D08 608 448 125 M1400 61608 M1402 61608 D09 609 448 150 M1400 61609 M1402 61609 D10 610 448 175 M1400 61610 M1402 61610 D11 611 448 ...

Страница 92: ...742 468 575 M1400 61742 M1402 61742 M1310A Option Ref M1402A Channel Frequency MHz Transmitter VCXO P N Receiver VCXO PN G04 544 433 250 M1400 61544 M1402 61544 G06 548 433 350 M1400 61548 M1402 61548 G07 791 433 600 M1400 61791 M1402 61791 G08 598 433 625 M1400 61598 M1402 61598 G09 599 433 650 M1400 61599 M1402 61599 G10 588 433 675 M1400 61588 M1402 61588 G11 600 433 700 M1400 61600 M1402 61600...

Страница 93: ...ency MHz Transmitter VCXO P N Receiver VCXO PN G04 544 433 250 M1400 61544 M1402 61544 G06 548 433 350 M1400 61548 M1402 61548 G07 791 433 600 M1400 61791 M1402 61791 G08 598 433 625 M1400 61598 M1402 61598 G09 599 433 650 M1400 61599 M1402 61599 G10 588 433 675 M1400 61588 M1402 61588 G11 600 433 700 M1400 61600 M1402 61600 G12 671 433 750 M1400 61671 M1402 61671 G13 677 433 900 M1400 61677 M1402...

Страница 94: ...600 M1400 63119 M1402 63119 J20 J120 440 625 M1400 63120 M1402 63120 J21 J121 440 650 M1400 63121 M1402 63121 J22 J122 440 675 M1400 63122 M1402 63122 J23 J123 440 700 M1400 63123 M1402 63123 J24 J124 440 725 M1400 63124 M1402 63124 J25 J125 440 750 M1400 63125 M1402 63125 J26 J126 440 775 M1400 63126 M1402 63126 J27 J127 440 800 M1400 63127 M1402 63127 J28 J128 440 825 M1400 63128 M1402 63128 J29...

Страница 95: ...393 466 2375 M1400 61393 M1402 61393 D05 605 448 250 M1400 61605 M1402 61605 D06 606 448 275 M1400 61606 M1402 61606 D08 608 448 125 M1400 61608 M1402 61608 D09 609 448 150 M1400 61609 M1402 61609 D10 610 448 175 M1400 61610 M1402 61610 D11 611 448 200 M1400 61611 M1402 61611 D12 612 448 225 M1400 61612 M1402 61612 M1310A Option Ref M1402A Channel Frequency MHz Transmitter VCXO P N Receiver VCXO P...

Страница 96: ...r VCXO PN A01 551 466 8125 M1400 61551 M1402 61551 A02 552 466 8375 M1400 61552 M1402 61552 A03 553 466 8625 M1400 61553 M1402 61553 A04 554 466 8875 M1400 61554 M1402 61554 M1310A Option Ref M1402A Channel Frequency MHz Transmitter VCXO P N Receiver VCXO PN N01 721 441 975 M1400 61721 M1402 61721 N02 722 441 925 M1400 61722 M1402 61722 N03 723 441 985 M1400 61723 M1402 61723 N04 724 441 900 M1400...

Страница 97: ...392 M1402 61392 393 393 466 2375 M1400 61393 M1402 61393 M1310A Option Ref M1402A Channel Frequency MHz Transmitter VCXO P N Receiver VCXO PN S14 314 454 125 M1400 61314 M1402 61313 S18 318 454 225 M1400 61318 M1402 61318 S22 322 454 325 M1400 61322 M1402 61322 S28 328 454 475 M1400 61328 M1402 61328 M1310A Option Ref M1402A Channel Frequency MHz Transmitter VCXO P N Receiver VCXO PN all xxx 4430 ...

Страница 98: ...439 875 M1400 61756 M1402 61756 K07 757 439 950 M1400 61757 M1402 61757 K08 758 439 975 M1400 61758 M1402 61758 K09 759 439 900 M1400 61759 M1402 61759 K10 760 439 925 M1400 61760 M1402 61760 M1310A Option Ref M1402A Channel Frequency MHz Transmitter VCXO P N Receiver VCXO PN G04 544 433 250 M1400 61544 M1402 61544 G06 548 433 350 M1400 61548 M1402 61548 G07 791 433 600 M1400 61791 M1402 61791 G11...

Страница 99: ... 61708 M1402 61708 M1310A Option Ref M1402A Channel Frequency MHz Transmitter VCXO P N Receiver VCXO PN U20 020 460 6875 M1400 62020 M1402 61020 U21 021 460 7375 M1400 62021 M1402 61021 U22 022 460 8375 M1400 62022 M1402 61022 U23 023 460 6625 M1400 62023 M1402 61023 U24 024 460 8625 M1400 62024 M1402 61024 U25 025 460 7875 M1400 62025 M1402 61025 U26 026 460 7125 M1400 62026 M1402 61026 U27 027 4...

Страница 100: ...62046 M1402 61046 U47 047 466 7875 M1400 62047 M1402 61047 U48 048 466 7375 M1400 62048 M1402 61048 U49 049 468 2875 M1400 62049 M1402 61049 U50 050 468 3375 M1400 62050 M1402 61050 U87 087 466 4125 M1400 62087 M1402 61087 U88 088 466 4875 M1400 62088 M1402 61088 U89 089 466 5625 M1400 62089 M1402 61089 U90 090 466 8375 M1400 62090 M1402 61090 U91 091 466 9125 M1400 62091 M1402 61091 U92 092 466 5...

Страница 101: ...USA Chapter 11 Channels and Frequencies 393 393 466 2375 M1400 61393 M1402 61393 M1310A Option Ref M1402A Channel Frequency MHz Transmitter VCXO P N Receiver VCXO PN ...

Страница 102: ...USA Chapter 11 Channels and Frequencies ...

Страница 103: ...tays on 21 error messages 14 F fetal monitor interface pin connections 31 FMP Detector 70 FSK Bandpass 75 FSK Demodulator 75 FSK Generator 71 fuse part numbers 44 replacement and removal 58 values 58 I Input Filter 74 interface pin connections 31 to fetal monitor 31 IUP transducer specifications 10 J Japan ID 73 M maximum input output voltages 4 Modes 71 O operating environment 2 temperatures 2 Os...

Страница 104: ...o transmitter 36 show last error warning 36 using 34 specifications antenna 6 channels frequencies 6 DECG transducers 9 environment 5 inputs 6 IUP transducer 10 power requirements 5 remote event marker 10 Telemetry 5 Toco transducer 8 storage temperatures 2 T testing 7 parameter test 13 Receiver assembly 65 Receiver preamplifier 64 receiver self test 11 Receiver VCXO 66 RF bench test 59 self test ...

Страница 105: ...ter processor board replacement and removal 47 Transmitter VCXO bench test 60 replacement and removal 50 troubleshooting 17 general problems 17 troubleshooting flowchart cardio channel 25 event marker 29 FMP 27 no LED s lit on receiver 19 not all LED s lit 21 nurse call 30 Toco channel 26 transducer not detected 24 transmission INOP range 22 transmission range 23 yellow LED stays on 21 U ultrasoun...

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