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Tabor Electronics 8600 User Manual

100 mhz programmable pulse generator
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User Manual
8600
100 MHz Programmable
Pulse Generator
Serial Prefix: 20
Tabor Electronics Ltd.
9 Hatasia Street, Tel Hanan, Israel 20302
TEL: (972) 4 821 3393, FAX: (972) 4 821 3388
[www.taborelec.com]
PUBLICATION DATE: August 21, 2005
REVISION: C
Copyright 2001 by Tabor Electronics. All rights reserved. This book or parts thereof may not be reproduced in
any form without written permission of the publisher.

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Summary of Contents for Tabor Electronics 8600

  • Page 1 TEL: (972) 4 821 3393, FAX: (972) 4 821 3388 [www.taborelec.com] PUBLICATION DATE: August 21, 2005 REVISION: C Copyright 2001 by Tabor Electronics. All rights reserved. This book or parts thereof may not be reproduced in any form without written permission of the publisher.

  • Page 2: Warranty

    Repair necessitated by misuse of the product is not covered by this warranty. No other warranties are expressed or implied, including but not limited to the implied warranties of merchantability and fitness for a particular purpose. Tabor Electronics is not liable for consequential damage.
  • Page 3 Tabor Electronics Ltd. REPAIR AND CALIBRATION REQUEST FORM To allow us to better understand your repair requests, we suggest you use the following outline when calling and include a copy with your instrument to be sent to the Tabor Repair Facility.

  • Page 4: Safety Precautions

    Safety Precautions The following safety precautions should be observed before using this product and associated computer. Although some instruments and accessories would normally be used with non-haz- ardous voltages, there are situations where hazardous conditions may be present. This product is intended for use by qualified personnel who recognize shock hazards and are familiar with the safety precautions required to avoid possible injury.

  • Page 5: Declaration Of Conformity

    EN 55022 - Radiated, Class B EN 55022 - Conducted, Class B EN 50082-1 Immunity: IEC 801-2 (1991) - Electrostatic Discharge IEC 801-3 / ENV50140 (1993) - RF Radiated IEC 801-4 (1991) - Fast Transients Model 8600 was tested in typical configuration.

  • Page 6: Table Of Contents

    Model 8600 Table Of Contents TABLE OF CONTENTS SECTION 1. GENERAL INFORMATION Introduction Description Instrument and Manual Identification Options Specifications Safety Consideration Accessories Supplied SECTION 2. INSTALLATION Introduction Unpacking and Initial Inspection Performance Checks Power Requirements Grounding Requirements Installation and Mounting...
  • Page 7 Table Of Contents Model 8600 Error Indication 3-7-1 Audible Alarm 3-7-2 Error Messages 3-7-2-1 General Error 3-7-2-2 Limit Errors 3-7-2-3 IEEE-488 Error Messages 3-7-2-4 Pulse Set-up Error Using The Data Entry 3-8-1 Special Function Keys 3-8-2 Numerals and Delimiters Using Front Panel Set-ups...
  • Page 8 4-9-7 Set-Ups (STO, RCL) 4-13 4-9-8 Parameter Programming 4-13 4-9-9 SRQ Mode (Q) and Serial Poll Status Byte Format 4-13 4-10 Reading From The Model 8600 4-14 4-10-1 Interrogate Parameter Commands (I) 4-15 4-10-2 Terminator (Z) 4-15 4-10-3 Prefix (X)
  • Page 9 Table Of Contents Model 8600 5-10-8 Trigger Modes Operation Checks SECTION 6. THEORY OF OPERATION Introduction Overall Functional Description Power Supply Board C.P.U Board 6-4-1 C.P.U Board block diagram 6-4-2 Memory Mapping 6-4-3 Address Decoding 6-4-4 Reciprocal Counter/Timer 6-4-5 Keyboard/Display Interface...
  • Page 10 Model 8600 Parts List - V.C.O Board Assembly Model 8600 Parts List - P.W/Delay (A & B) Board Assembly Model 8600 Parts List - Output Amplifier (A & B) Board Assembly Model 8600 Parts List - Front Panel Assembly Page - 5...
  • Page 11 Table Of Contents Model 8600 This page was intentionally left blank Page - 6...

  • Page 12: Section 1. General Information

    This manual provides operating and maintenance informa- gered either by an external signal or by means of front panel tion for the Model 8600 Pulse Generator. Section 1 is a gen- manual switch. An internal timer is provided to repeatedly eral description of the instrument.

  • Page 13: Options

    1-7. ACCESSORIES SUPPLIED The 8600 is supplied with ac power cord and with an instruc- tion manual. ent tests. Page 1-2...
  • Page 14 Model 8600 General Information Table 1-1. Model 8600 Specifications WAVEFORMS: Pulse, Pulse complement OUTPUT MODES: Single, Delayed, Double, Fixed duty cycle, Disabled OUTPUT CHANNELS: Two channels. Channel A standard, Channel B optional. Both channels are exactly identical in parameters and performance. Only period is common. Other parame- ters independently selected.
  • Page 15 General Information Model 8600 Table 1-1. Model 8600 Specifications (continued) PULSE PERFORMANCE Aberration: Less than 5 % Reflections: Less than 10 % Source Impedance: 50 ohms +/-2 % Transition Times: 2 nS AUXILIARY OUTPUTS ECL/TTL OUTPUTS Period: Same as for main outputs...
  • Page 16 Model 8600 General Information Table 1-1. Model 8600 Specifications (continued) Input: Via EXT FREQ / TRIG IN BNC Input Impedance: 10 Kohms +/-5 % Trigger Point: Adjustable from -10.0 V to +10.0 V Trigger Sensitivity: +/-500 mVp-p Slope: Selectable positive or negative going edge...
  • Page 17 General Information Model 8600 Table 1-1. Model 8600 Specifications (continued) Dead time between measured pulses: 50 nS IEEE - 488 INTERFACE Programmable controls: All front panel controls except POWER switch. Subsets Implemented: SH1, AH1, T6, TE0, L4, LE0, SR1, RL1, PP2, DC1, DT1, C0...

  • Page 18: Section 2. Installation

    Unpacking and handling of the counter requires only the normal precautions and procedures applicable to the han- The Model 8600 should be operated from a power source dling of sensitive electronic equipment. The contents of all with its neutral at or near ground (earth potential). The instru-...

  • Page 19: Installation And Mounting

    2-7. BENCH MOUNTING 1. Before packing the unit, place all accessories into a plastic The Model 8600 is shipped with plastic feet, tilt stand in bag and seal the bag. place and ready for use as a bench or portable instrument. See 2.

  • Page 20: Safety

    Show the work authorization order as well as the date and method of ship- ment. ALWAYS OBTAIN A RETURN AUTHORIZATION NUMBER FROM THE FACTORY BEFORE SHIPPING THE INSTRUMENT TO TABOR. Figure 2-1. Model 8600 - outline dimensions. Page 2-3...
  • Page 21 Installation Model 8600 This page was intentionally left blank Page 2-4...

  • Page 22: Introduction

    The pro- grammed period retains its value at all of the output connec- The front panel layout of the Model 8600 is shown in Figure tors. Channels A and B share the same period.
  • Page 23 Crossing this voltage level with PLEMENT outputs and the other button selects between one an external signal, and with the Model 8600 set to one of the of three operating modes: SINGLE, DOUBLE or DE- triggering modes, stimulates the generator to generate output LAYED.

  • Page 24: Connectors

    3-2-2. Connectors whenever the pulse generator receives a legal triggering sig- nal. The connectors are used for connecting the Model 8600 to the unit under test and to and to external triggering source. 3-3. REAR PANEL FAMILIARIZATION 1. TRIG/COUNTER INPUT - The TRIG/COUNTER IN- 3-3-1.

  • Page 25: Power-Up Procedure

    Operating Instructions Model 8600 3-4. POWER-UP PROCEDURE GPIB 17 The basic procedure of powering up the Model 8600 is de- 7. Once the GPIB address is displayed, the instrument per- scribed below. form ROM and RAM tests. Successful execution of these tests is followed by a one second display of the installed soft- 1.

  • Page 26: Display Messages

    In general, whenever a front panel or GPIB programming at- messages associated with IEEE-488 programming. These tempts to put the 8600 into an error condition, the 8600 re- messages are discussed in section 4 of this manual. sponds both by front panel message and by making a Service request.

  • Page 27: Limit Errors

    For tons will cause the following message to be displayed: example, if Model 8600 is placed in fixed duty cycle mode it will not accept a change in its OUTPUT section from SIN- PrESS LcL GLE to DOUBLE pulse mode.

  • Page 28: Using The Data Entry

    SHIFT ? Setting-up all parameters in a versatile instrument such as the Model 8600 takes some time. The set-up time is longer when The question mark (?) appears blinking; indicating that a couple of tests are involve and more than one set-up is re- the instrument is ready for a consequent press of another quired.

  • Page 29: Store Set-Ups

    (Where dd is the selected memory location) bration and performance verification of the Model 8600. This display indicates that the function generator ac- To set the Model 8600 for operation in the recall mode knowledged the entered memory location. The instrument proceed as follows: then resumes normal its operation.

  • Page 30: Using The Modifier Control

    Inc nnX ment permits accessing the DTY parameter which is associ- ated with this mode. Model 8600 when set to this mode will Where nnX may be any number from 1 to 100. not permit modification of the pulse width parameter. To re-...

  • Page 31: Selecting An Output Mode

    The MANUAL button simulates an Note that if channel B is installed, the light indicates that this external signal. If the Model 8600 is set to GATED mode, an channel is disabled as well. output signal will be available as long as the MANUAL push- button is depressed.

  • Page 32: Using The Counter/Timer

    Modifier push-buttons UP or Down to scan through the er- rors. Each error is indicated by a number. The interpretation Model 8600 may be set to operate as a stand alone universal of these numbers is given in the following. Errors are the same counter/timer.

  • Page 33: Special Shift Functions

    Error 5 (15) relates to the fixed duty cycle operating mode and SHIFT 5 - Loads the internal non-volatile RAM with factory may occur only when the Model 8600 is set to operate in this pre-selected set-ups which may be used in conjunction with mode.

  • Page 34: Changing Gpib Address

    Model 8600 Operating Instructions Before performing such an operation make 3-18. CHANGING GPIB ADDRESS sure that the set-ups which you have pre- The GPIB address is modified using front panel program- viously recorded are no longer required. ming. The non-volatile memory stores the GPIB address. A conventional address switche is not provided.
  • Page 35 Operating Instructions Model 8600 This page was intentionally left blank Page 3-14...

  • Page 36: Introduction

    4-5. may be passed to an appropriate device through a special 2. Information necessary to connect the Model 8600 to command). Any number of talkers or listeners may be the bus and to change the bus address is contained in present up to the hardware constraints of the bus.

  • Page 37: Ieee-488 Bus Lines

    IEEE-488 Operation Model 8600 Figure 4-1. IEEE Bus Configuration Once the device is addressed to talk or listen, ap- bus is to be considered data or a multiline command as propriate bus transactions may be initiated. For example, described in paragraph 4-8-2.

  • Page 38: Data Lines

    Model 8600 IEEE-488 Operation Figure 4-2. IEEE Handshake Sequence go high until the slowest device has accepted the data 1. DAV (Data Valid) - The source controls the state of byte. the DAV line. After the NDAC line goes high, the source then sets 2.

  • Page 39: Interface Function Codes

    AH function. No Extended Listener capabilities T - (Talker Function) - The ability of the Model 8600 C - (controller Function) - The Model 8600 does not to send device-dependent data over the bus (to another have a controller function.

  • Page 40: Hardware Considerations

    Depending on programming, all cable shield is connected to contact 12. Each ground data may be routed through the controller, or it may be line is connected to digital common in the Model 8600. transmitted directly from one instrument to another.

  • Page 41: Bus Commands

    REN (Remote Enable) - The remote enable command is interface would be essentially worthless without appro- sent to the Model 8600 by the controller to set the in- priate commands to control the communications between strument up for remote operation. Generally, this should the various instruments on the bus.

  • Page 42: Universal Multiline Commands

    DCL (Device Clear) - The DCL command may be used EOI (End Or Identify) - The EOI command is used to to clear the Model 8600, setting it to a known state. Note positively identify the last byte in a multi-byte transfer that all devices on the bus equipped to respond to a DCL sequence.

  • Page 43: Addressed Commands

    SDC (Selective Device Clear) - The SDC command per- til the next time a listener address command forms essentially the same function as the DCL command is received. This places the Model 8600 in except that only the addressed device will respond. This the local lockout state again.

  • Page 44: Unaddress Commands

    For example, 3. Set certain bits in its status byte. M2 is sent to the Model 8600 to place the instrument in 4. Generate an SRQ if programmed to do so. the trigger mode. The IEEE-488 bus treats device-de-...

  • Page 45: Command Description

    IEEE-488 Operation Model 8600 Table 4-5. Device-Dependent Command Summary MODE COMMAND DESCRIPTION Display/Program Channel A parameters Channel B parameters Display Parameter VPER Display period (PER) VHIL Display high level (H.LVL) VLOL Display low level (L.LVL) VWID Display pulse width (P.WID)
  • Page 46 Model 8600 IEEE-488 Operation Table 4-5. Device-Dependent Command Summary (continued) MODE COMMAND DESCRIPTION Parameter Programming Set period. Delimiter=NS,US,MS,S Set high level. Delimiter=MV,V Set low level. Delimiter=MV,V Set pulse width. Delimiter=NS,US,MS,S Set delay. Delimiter=NS,US,MS,S Set duty cycle. Delimiter=% Set burst number. Delimiter=# Set int trig period.

  • Page 47: Display/Program (Cha, Chb)

    Model 8600 4-9-1. Display/Program (CHA, CHB) tinuous mode or with an internal stimulant. Program the Model 8600 to one of the trigger modes by sending one The display/program command selects the channel to be of the following commands: programmed. One of these commands should be sent once at the beginning of the string.

  • Page 48: Auxiliary Level (Ttl, Ecl)

    Model 8600 status byte can be checked, by sending one of the following commands: via serial polling, to determine if it was the Model 8600 that requested service. Other bits in the status byte could also be set depending on certain data or error conditions.

  • Page 49: Reading From The Model 8600

    (IERR). mation string is made up of ASCII alpha and alphanumeric 4. Rqs - Model 8600 will set this bit if one or more characters. For more details on the information strings format refer to paragraph 4-10-1.

  • Page 50: Interrogate Parameter Commands (I)

    When the interrogate parameter com- of the data string increases by one or two mand is given, the Model 8600 will update a special characters respectively. buffer with the interrogated parameter for the displayed channel.
  • Page 51 The Model Z8 = No terminator with EOI 8600 will normally send EOI during the last byte of its Z9 = No terminator without EOI data string or status word. The terminator and the EOI...

  • Page 52: Prefix (X)

    The prefix from the data string may be suppressed using this command. When the prefix is suppressed the output An Illegal Instruction error results when the Model 8600 data string is three byte shorter. X command parameters receives an invalid command such as A0 or an invalid include: parameter like PER20PS.
  • Page 53 IEEE-488 Operation Model 8600 This page was intentionally left blank Page 4-18...

  • Page 54: Introduction

    5-3. FUSE REPLACEMENT This section provides maintenance, service information, and The Model 8600 has a line fuse to protect the instrument from performance tests for the Model 8600, the Channel B output excessive current. This fuse may be replaced by using the amplifier (option 1), and the universal counter option.

  • Page 55: Option 1 Installation Procedure

    Also observe that the plug in connectors, when plugged to the correct slot, fit exactly to the plugged board. If purchased with the Model 8600, the option will be factory 3. Slide the pulse width/delay board along the card guide.

  • Page 56: Special Handling Of Static Sensitive Devices

    5-7. CLEANING This reading indicates that the instrument accepted the in- Model 8600 should be cleaned as often as operating condi- stalled option and will now allow modification of parameters tion require. Thoroughly clean the inside and the outside of which are associated with Channel B.

  • Page 57: Environmental Conditions

    To ensure accuracy, turn on the WARNING power to the Model 8600 and allow it to warm-up for at least The memory down-load function will over- 30 minutes before beginning the performance tests proce- ride any previous front panel set-ups.

  • Page 58: Pulse Width Accuracy Check

    Model 8600 Maintenance And Performance Tests MEASURED RECALL REQUIRED PERIOD SET-UP COUNTER READING Verify that counter reading is within the required results as 10.0 nS 10.0 nS +/-.40 nS follows: 12.0 nS 12.0 nS +/-.44 nS 14.0 nS 14.0 nS +/-.48 nS...

  • Page 59: Pulse Response Check

    MEASURED RECALL REQUIRED ohms termination. TIME SET-UP TRACE 3. Connect the 8600 SYNC OUT to the oscilloscopes’s exter- 1.5 nS 5 nS <5 % overshoot nal trigger. 1.5 nS 5 nS <5 % overshoot 4. Set oscilloscope to external trigger and verify that Model 1.5 nS...

  • Page 60: Section 6. Theory Of Operation

    6-2. OVERALL FUNCTIONAL DESCRIPTION The power supply board generates the necessary voltage lev- The Model 8600 is a 7 digit pulse generator with a complete els which are essential for operating the various circuits. The digital control over all pulse parameters such as period, pulse following paragraphs contain a description of the power sup- width, delay, amplitude etc.

  • Page 61: Board

    The above theory is applied to the circuit which is used in is an 8-bit CPU capable of directly addressing up to 64K bytes the Model 8600. The +5 V supply is made of a switch - Q4, Q5 and their associated components. A switch controller - U7 of program memory (ROM) and up to another 64K bytes of data memory (RAM).

  • Page 62: Memory Mapping

    6-4-6. IEEE Interface a portion of the possible memory space is actually needed. The Model 8600 has a built in IEEE-488 interface that allows The Model 8600 uses a total of 32K of program memory the instrument to be controlled through the system controller.

  • Page 63: Control Circuit

    Theory Of Operation Model 8600 6-5-1. Control Circuit C14 is charged by a constant positive current from the current generator until the upper threshold of 0 V is reached. The control circuit generates the correct digital words which The shmidt trigger circuit then changes its state and negative are necessary to control the analog circuits.

  • Page 64: Trigger/Counter Input Circuit

    Model 8600 Theory Of Operation 6-6-2. Pulse Width Circuit 6-5-4. Trigger/Counter Input Circuit The heart of the pulse width circuit is a gateable 50 MHz os- The trigger circuit conditions the input signal for the proceed- cillator - U17c and its associated components. U16b controls ing circuitry.

  • Page 65: Ecl Line Receiver

    Theory Of Operation Model 8600 The current into the negative level shifter is applied through 6-7-1. ECL Line Receiver R26 and R27 from the amplitude controller. The ECL Line receiver transfers the signal from the pulse 6-7-3. Positive/Negative Current Switches width/delay board to the level shifters.

  • Page 66: Offset Generator

    Model 8600 Theory Of Operation 6-7-4. Offset Generator 6-7-5. Amplitude Control The offset is generated by the D/A U5 and operational ampli- The amplitude control generates the necessary currents fiers U14 U15 and U16, Q14, Q15, Q25 and Q26 and their...
  • Page 67 Theory Of Operation Model 8600 This page was intentionally left blank Page 6-8...

  • Page 68: Section 7. Adjustments

    To ensure long-term calibration accuracy, turn on the power to the Model 8600 and allow it to Center all trimmers and if necessary, remove selected warm-up for at least 30 minutes before beginning the adjust- components and clear the holes to allow a selection of new ment procedure.

  • Page 69: Adjustment Procedure

    Model 8600 7-3. ADJUSTMENT PROCEDURE Procedure: Performed on V.C.O board assembly Model 8600 has a special function which down-loads the re- 1. Set 8201 controls as follows: quired front panel set-ups for the various adjustment proce- dures. To use this function depress the [SHIFT] push-button...

  • Page 70: Reference Oscillator Adjustment

    Fully clockwise Fully counterclockwise Equipment: Counter (6020) Procedure: Performed on Pulse Width/Delay board assem- 2. Connect Model 8600 output A to counter channel A input and set counter controls as follows: 1. Set counter to Pulse Width Averaged measurements and Function Period averaged connect 8600 OUTPUT A to counter.

  • Page 71: Delay Adjustment

    1. Set counter to Time Interval A to B measurements. OUT A R6 +2.500 V +/-10 mV 2. Connect 8600 SYNC OUTPUT connector to Channel A on the counter. Connect 8600 OUTPUT A connector to Channel 7-3-9. Pulse Response Adjustment Channels A and B B on the counter.

  • Page 72: Output Offset Adjustment Channels A And B

    3. Recall memory, set oscilloscope and perform adjustments as described in the following table. 1. Set DMM to DCV function and 20 V range. 2. Connect 8600 OUTPUT A to DMM input. Terminate RECALL ADJ. REQUIRED SCOPE DMM input with a 50 ohms termination.
  • Page 73 Adjustments Model 8600 This page was intentionall left blank Page 7-6...

  • Page 74: Section 8. Parts List

    Selection guides for such components are not a) Instrument Model number. given anywhere in this manual. b) Instrument Serial number. Table 8-1. Model 8600 Parts List - Power Supply Board Assembly REF PART # DESCRIPTION REF PART #...

  • Page 75: Model 8600 Parts List - C.p.u Board Assembly

    Parts List Model 8600 Table 8-1. Model 8600 Parts List - Power Supply Assembly (continued) REF PART # DESCRIPTION REF PART # DESCRIPTION 1533-01070 CAP ELEC 100 25V 1100-12900 FUSE 1.6A FAST BLOW 0500-53800 TSTR D44H5 1100-11300 FUSE 0.5A FAST BLOW...

  • Page 76: Model 8600 Parts List - V.c.o Board Assembly

    Model 8600 Parts List Table 8-3. Model 8600 Parts List - V.C.O Board Assembly (continued) 0300-21100 DIODE REF 1N825A REF PART # DESCRIPTION REF PART # DESCRIPTION 0500-90900 ANALOG SW DG211CJ 0500-53400 OP AMP LN308A 0300-20900 DIODE ZENER 1N749A 0500-56500...
  • Page 77 Parts List Model 8600 Table 8-3. Model 8600 Parts List - V.C.O Board Assembly (continued) 0100-05610 RES COMP 560 R112 0100-03310 RES COMP 330 R113 0100-09100 RES COMP 91 REF PART # DESCRIPTION REF PART # DESCRIPTION 0100-07510 RES COMP 750...
  • Page 78 DLY LINE 10nS 1532-0107P CAP ELEC 100 16V 1532-0107P CAP ELEC 100 16V 3000-17000 CON RF FEMALE JACKSON Table 8-4. Model 8600 Parts List - Pulse Width/Delay (A and B) Board Assembly REF PART # DESCRIPTION REF PART # DESCRIPTION 0510-04900 74LS490...
  • Page 79 Parts List Model 8600 Table 8-4. Model 8600 Parts List - Pulse Width/Delay (A and B) Board Assembly (continued) 0100-03300 RES COMP 33 REF PART # DESCRIPTION REF PART # DESCRIPTION 0102-09100 RES COMP 91 1/8W 0102-05610 RES COM 560 1/8W...
  • Page 80 Model 8600 Parts List Table 8-4. Model 8600 Parts List - Pulse Width/Delay (A and B) Board Assembly (continued) 1500-01040 CAP CER .1 -20+80% 50V 0600-10000 DLY LINE 7nSEC REF PART # DESCRIPTION REF PART # DESCRIPTION 1500-01040 CAP CER .1 -20+80% 50V...
  • Page 81 Parts List Model 8600 Table 8-5. Model 8600 Parts List - Output Amplifier (A and B) Board Assembly (continued) 0104-71R50 RES MTF 71.5 % REF PART # DESCRIPTION REF PART # DESCRIPTION 0400-40100 TSTR 2N2219A 0400-01500 TSTR 2N2905A 0100-08210 RES COMP 820...
  • Page 82 Model 8600 Parts List Table 8-6. Model 8600 Parts List - Front Panel Board Assembly REF PART # DESCRIPTION REF PART # DESCRIPTION 0510-02700 IC 74LS138 DS20 1000-00700 LED RED MV 57124-18 0510-02700 IC 74LS138 DS21 1000-00700 LED RED MV 57124-18...

  • Page 83: Schematic Drawings

    Model 8600 Schematic Drawings SECTION 9 SCHEMATIC DRAWINGS List Of Figures Figure Description Page Main board - Inter-connection Diagram Power Supply Board - Schematic Drawing Power Supply Board - Assembly Drawing C.P.U Board - Schematic Drawing C.P.U Board - Assembly Drawing V.C.O Board - Schematic Drawing...

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