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Summary of Contents for Keysight DSOX1204A
- Page 1 Keysight InfiniiVision DSOX1204A/G Oscilloscopes Service Guide...
- Page 2 DFARS and are set forth specifically in No part of this manual may be reproduced in rate agreement shall control. writing elsewhere in the EULA. Keysight shall any form or by any means (including elec- be under no obligation to update, revise or...
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Page 3: In This Service Guide
Procedures for troubleshooting the oscilloscope follow the problem solving suggestions. Replacing Assemblies The service policy for DSOX1204A/G oscilloscopes is unit replacement, so there are no instructions for replacing internal assemblies in this service guide. Replaceable Parts Because the service policy for the DSOX1204A/G oscilloscopes is unit replacement, no replaceable parts are available. - Page 4 Instructions for pressing a series of keys are written in an abbreviated manner. Instructions for pressing Key1, then pressing Softkey2, then pressing Softkey3 are abbreviated as follows: Press [Key1] & Softkey2 & Softkey3. The keys may be front panel keys, or softkeys, which are located directly below the oscilloscope display. DSOX1204A/G Oscilloscopes Service Guide...
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Page 5: Table Of Contents
Conventions / 18 To verify DC vertical gain accuracy / 19 To verify bandwidth (-3 dB) / 24 To verify time base accuracy / 28 To verify trigger sensitivity / 30 Test Internal Trigger Sensitivity / 31 DSOX1204A/G Oscilloscopes Service Guide... - Page 6 Contents Keysight DSOX1204A/G Oscilloscopes Performance Test Record / 34 Calibrating and Adjusting User Calibration / 38 To perform User Cal / 38 User Cal Status / 38 Troubleshooting Solving General Problems with the Oscilloscope / 40 If there is no display / 40...
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Page 7: Figures
Figure 3. Setting Up Equipment for Bandwidth (-3 dB) Verification Test / 25 Figure 4. Setting Up Equipment for Internal Trigger Sensitivity Test / 32 Figure 5. Default setup screen / 44 Figure 6. Example pulses / 46 DSOX1204A/G Oscilloscopes Service Guide... - Page 8 Figures DSOX1204A/G Oscilloscopes Service Guide...
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Page 9: Tables
Table 8. Time Base Accuracy Test Limits / 28 Table 9. Equipment Required to Verify Time Base Accuracy / 28 Table 10. Equipment Required to Verify Trigger Sensitivity / 30 Table 11. Internal Trigger Sensitivity Specifications / 31 DSOX1204A/G Oscilloscopes Service Guide... - Page 10 Tables DSOX1204A/G Oscilloscopes Service Guide...
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Page 11: Characteristics And Specifications
Contact Us / 14 This chapter contains a partial list of characteristics and specifications for the Keysight InfiniiVision DSOX1204A/G oscilloscopes. For a full list of Keysight InfiniiVision DSOX1204A/G oscilloscopes characteristics and specifications see the data sheets. The data sheets are available at www.keysight.com/products/DSOX1204G. -
Page 12: Measurement Category
Characteristics and Specifications Measurement Category Measurement Category The InfiniiVision DSOX1204A/G oscilloscope are not intended to be used for measurements in Measurement Category II, III, or IV. Use this instrument only for measurements within its specified measurement category WARNING (not rated for CAT II, III, IV). No transient overvoltages allowed. -
Page 13: Maximum Input Voltages
Category Category II, which is typical of cord-and-plug connected equipment. Pollution Degree The InfiniiVision DSOX1204A/G oscilloscopes may be operated in environments of Pollution Degree 2 (or Pollution Degree 1). Pollution Degree Pollution Degree 1: No pollution or only dry, non-conductive pollution occurs. -
Page 14: Specifications
Or go to the Keysight home page at www.keysight.com and search for DSOX1204A/G oscilloscopes data sheet. To order a data sheet by phone, please contact your local Keysight office. Contact Us To contact Keysight, see: www.keysight.com/find/contactus DSOX1204A/G Oscilloscopes Service Guide... -
Page 15: Testing Performance
To verify time base accuracy / 28 To verify trigger sensitivity / 30 Keysight DSOX1204A/G Oscilloscopes Performance Test Record / 34 This chapter explains how to verify correct oscilloscope operation and perform tests to ensure that the oscilloscope meets the performance specifications. -
Page 16: Overview
To verify whether a test passes, verify that the reading is within the limits in the Performance Test Record. If a performance test fails If a performance test fails, first perform the User Cal procedure. Press the following keys to access User Cal: [Utility]→Service→Start User Cal. DSOX1204A/G Oscilloscopes Service Guide... -
Page 17: List Of Test Equipment
50 Ohm Feedthrough Termination BNC (f) to BNC (m) Keysight 0960-0301 Most parts and equipment are available at www.keysight.com. See respective manufacturer’s websites for their equipment. † These parts available at www.parts.keysight.com at the time this manual was published. DSOX1204A/G Oscilloscopes Service Guide... -
Page 18: Conventions
Table 2 Conventions Models Referred to as: DSOX1204A, DSOX1204G 70 MHz Models DSOX1204A, DSOX1204G with D1200BW1A upgrade 100 MHz Models DSOX1204A, DSOX1204G with D1200BW2A upgrade (from 200 MHz Models 70 MHz) or D1200BW3A upgrade (from 100 MHz) DSOX1204A/G Oscilloscopes Service Guide... -
Page 19: To Verify Dc Vertical Gain Accuracy
1 Press [Save/Recall] > Default/Erase > Factory Default to recall the factory default setup. 2 Set the probe attenuation to 1:1 on the analog channel you are testing (for example, [1] > Probe > Probe; then, turn the Entry knob to select 1.00 : 1). DSOX1204A/G Oscilloscopes Service Guide... - Page 20 “Use a Blocking Capacitor to Reduce Noise" on page 23. Full scale is defined as 8 mV on the 500 uV/div range. Full scale on all other ranges is defined as 8 divisions times the V/div setting. DSOX1204A/G Oscilloscopes Service Guide...
- Page 21 Press Type:; then, turn the Entry knob to select Average - Full Screen, and press Add Measurement. 5 Read the “current” average voltage value as V1. 6 Use the BNC tee and cables to connect the oscilloscope calibrator/power supply to both the oscilloscope and the multimeter (see Figure DSOX1204A/G Oscilloscopes Service Guide...
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Page 22: Figure 1. Setting Up Equipment For Dc Vertical Gain Accuracy Test
7 Adjust the output so that the multimeter reading displays, as close as possible, the first Volts/div calibrator setting value in Table 8 Wait until the measurement settles. 9 Read the “current” average voltage value again as V2. 10 Calculate the difference V2 - V1. DSOX1204A/G Oscilloscopes Service Guide... -
Page 23: Figure 2 Using A Blocking Capacitor To Reduce Noise
2. If a BNC capacitor is not available, use an SMA blocking capacitor, adapter, and cap. See “Blocking capacitor and shorting cap in the equipment list on page 17 for details. Blocking Capacitor BNC shorting To oscilloscope input Figure 2 Using a Blocking Capacitor to Reduce Noise DSOX1204A/G Oscilloscopes Service Guide... -
Page 24: To Verify Bandwidth (-3 Db)
Connect the power sensor to one output of the power splitter. c Use an N-to-BNC adapter to connect the other splitter output to the channel 1 input using a 50 ohm feedthrough terminator at the oscilloscope input BNC. DSOX1204A/G Oscilloscopes Service Guide... -
Page 25: Figure 3. Setting Up Equipment For Bandwidth (-3 Db) Verification Test
Power Splitter Power Sensor N Cable Power Meter Figure 3 Setting Up Equipment for Bandwidth (-3 dB) Verification Test 2 Set up the power meter. Set the power meter to display measurements in units of watts. DSOX1204A/G Oscilloscopes Service Guide... - Page 26 100 MHz Models: 100 MHz • 70 MHz Models: 70 MHz 10 Referencing the frequency from step 9, set the power meter Cal Factor % to the frequency value on the calibration chart on the power sensor. DSOX1204A/G Oscilloscopes Service Guide...
- Page 27 17 Turn off the current channel and turn on channel 2 using the channel keys. 18 Set the trigger source to channel 2. 19 Repeat steps 3 through 15 for the remaining channels, setting the parameters of the channel being tested where appropriate. DSOX1204A/G Oscilloscopes Service Guide...
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Page 28: To Verify Time Base Accuracy
Set the output to 10 MHz, approximately 1 V sine wave. 2 Connect the output of the signal generator to oscilloscope channel 1 using the BNC cable. Also, connect a 50 ohm feedthrough termination between the channel 1 input and the BNC cable. DSOX1204A/G Oscilloscopes Service Guide... - Page 29 Use the following formula to calculate the test limits. Time base accuracy limit: 50 ppm ±5 ppm per year (aging) g Record the result and compare it to the limits in the Performance Test Record (see page 34). DSOX1204A/G Oscilloscopes Service Guide...
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Page 30: To Verify Trigger Sensitivity
Keysight 11667A Power Meter Keysight N1914A Power Sensor Keysight E9304A or N8482A Cable BNC, Qty 3 Keysight 10503A Adapter N (m) to BNC (f), Qty 3 Keysight 1250-0780 Ω Feedthrough BNC (f) to BNC (m) Keysight 0960-0301 DSOX1204A/G Oscilloscopes Service Guide... -
Page 31: Test Internal Trigger Sensitivity
2 Press the [Mode/Coupling] key; then, press the Mode softkey to select Normal. 3 Connect the equipment (see Figure a Connect the signal generator output to the oscilloscope channel 1 input. b Connect a 50 ohm feedthrough termination between the channel 1 input and the BNC cable. DSOX1204A/G Oscilloscopes Service Guide... -
Page 32: Figure 4. Setting Up Equipment For Internal Trigger Sensitivity Test
Set the time base to 10 ns/div. d Set channel 1 to 10 mV/div. e Decrease the amplitude from the signal generator until 0.6 vertical divisions of the signal (about 6 mV ) is displayed. DSOX1204A/G Oscilloscopes Service Guide... - Page 33 If adjusting the trigger does not help, see the “Troubleshooting” chapter. Then return here. f Record the result as Pass or Fail in the Performance Test Record (see page 34). g Repeat this step for the remaining oscilloscope channels. DSOX1204A/G Oscilloscopes Service Guide...
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Page 34: Keysight Dsox1204A/G Oscilloscopes Performance Test Record
Testing Performance Keysight DSOX1204A/G Oscilloscopes Performance Test Record Serial No. ______________________________________ Test by _____________________________ Test Interval ____________________________________ Work Order No. ______________________ Recommended Next Testing ________________________ Temperature ____________ DC Vertical Gain Accuracy Range Power Supply Setting Test Limits Channel 1 Channel 2 Channel 3 Channel 4... - Page 35 1.2 div or 5 mV ________ ________ ________ ________ 70 MHz models: 10 MHz 0.6 div or 2.5 mV ________ ________ ________ ________ Max BW (70 MHz) 0.9 div or 3.8 mV ________ ________ ________ ________ DSOX1204A/G Oscilloscopes Service Guide...
- Page 36 Testing Performance DSOX1204A/G Oscilloscopes Service Guide...
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Page 37: Calibrating And Adjusting
Keysight InfiniiVision DSOX1204A/G Oscilloscope Service Guide 3 Calibrating and Adjusting This chapter explains how to adjust the oscilloscope for optimum operating performance. You should perform user calibration according to the following recommendations: • Every five years or after 10000 hours of operation •... -
Page 38: User Calibration
User Cal, and the status of probe calibrations for probes that can be calibrated. Note that AutoProbes do not need to be calibrated, but InfiniiMax probes can be calibrated. Results: User Cal date: Change in temperature since last User Cal: Failure: Comments: Probe Cal Status: DSOX1204A/G Oscilloscopes Service Guide... -
Page 39: Troubleshooting
To verify default setup. • To perform an Auto Scale on the Probe Comp signal. • To compensate passive probes. The service policy for all DSOX1204A/G oscilloscopes is unit replacement, so there are no internal assembly troubleshooting instructions in this service guide. -
Page 40: Solving General Problems With The Oscilloscope
Solving General Problems with the Oscilloscope This section describes how to solve general problems that you may encounter while using the Keysight DSOX1204A/G oscilloscopes. If there is no display Check that the power cord is firmly seated in the oscilloscope power receptacle. -
Page 41: If You Cannot See A Channel
Check that the desired oscilloscope channels are turned on. a Press the analog channel key until it is illuminated. Press the [Auto Scale] key to automatically set up all channels. DSOX1204A/G Oscilloscopes Service Guide... -
Page 42: Verifying Basic Operation
When the oscilloscope is turned on, the front panel LEDs will briefly light up in groups from bottom to top. • Next the Keysight logo appears on the display. • Next a message will appear with tips on getting started using the oscilloscope. -
Page 43: To Perform Front Panel Self Test
• center time reference. • Vertical: • Channel 1 on. • 5 V/div scale. • dc coupling. • 0 V position. • probe attenuation factor to 10.0:1. • Trigger: • Edge trigger. • Auto sweep mode. DSOX1204A/G Oscilloscopes Service Guide... -
Page 44: Figure 5 Default Setup Screen
20% grid intensity. • persistence off. • Other: • Acquire mode normal. • Run/Stop to Run. • cursor measurements off. Figure 5 Default setup screen 2 If your screen looks substantially different, replace the system board. DSOX1204A/G Oscilloscopes Service Guide... -
Page 45: To Perform An Auto Scale On The Probe Comp Signal
If you do not see the waveform, ensure your power source is adequate, the oscilloscope is properly powered-on, and the probe is connected securely to the front-panel analog channel input BNC and to the Demo 2 (Probe Comp) terminal. DSOX1204A/G Oscilloscopes Service Guide... -
Page 46: To Compensate Passive Probes
5 Connect probes to all other oscilloscope channels (channel 2 of a 2-channel oscilloscope). 6 Repeat the procedure for each channel. The process of compensating the probes serves as a basic test to verify that the oscilloscope is functional. DSOX1204A/G Oscilloscopes Service Guide... -
Page 47: Replacing Assemblies
Keysight InfiniiVision DSOX1204A/G Oscilloscope Service Guide 5 Replacing Assemblies The service policy for all DSOX1204A/G oscilloscopes is unit replacement, so there are no instructions for replacing internal assemblies in this service guide. -
Page 48: 5 Replacing Assemblies
Replacing Assemblies DSOX1204A/G Oscilloscopes Service Guide... -
Page 49: Replaceable Parts
Keysight InfiniiVision DSOX1204A/G Oscilloscope Service Guide 6 Replaceable Parts Because the service policy for DSOX1204A/G oscilloscopes is unit replacement, no replaceable parts are available for the Keysight DSOX1204A/G oscilloscopes. -
Page 50: 6 Replaceable Parts
Replaceable Parts DSOX1204A/G Oscilloscopes Service Guide... -
Page 51: Safety Notices
Keysight InfiniiVision DSOX1204A/G Oscilloscope Service Guide 7 Safety Notices This apparatus has been designed and tested in accordance with IEC Publication 61010, Safety Requirements for Measuring Apparatus, and has been supplied in a safe condition. This is a Safety Class I instrument (provided with terminal for protective earthing). -
Page 52: Warnings
Do not operate the instrument in the presence of flammable gasses or fumes. Operation of any electrical instrument in such an environment constitutes a definite safety hazard. Do not use the instrument in a manner not specified by the manufacturer. DSOX1204A/G Oscilloscopes Service Guide... -
Page 53: To Clean The Instrument
Clean the external surfaces of the instrument with a soft cloth dampened with a mixture of mild detergent and water. (3) Make sure that the instrument is completely dry before reconnecting it to a power source. DSOX1204A/G Oscilloscopes Service Guide... -
Page 54: Safety Symbols
Instruction manual symbol: the product is marked with this symbol when it is necessary for you to refer to the instruction manual in order to protect against damage to the product. Hazardous voltage symbol. Earth terminal symbol: Used to indicate a circuit common connected to grounded chassis. DSOX1204A/G Oscilloscopes Service Guide... - Page 55 DSOX1204A/G Oscilloscopes Service Guide...
- Page 56 Index DSOX1204A/G Oscilloscopes Service Guide...
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