Keysight N1914A Service Manual
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Keysight N1914A Service Manual

Epm series power meters
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Keysight N1913/1914A
EPM Series Power Meters
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Summary of Contents for Keysight N1914A

  • Page 1 Keysight N1913/1914A EPM Series Power Meters Service Guide...

  • Page 2: Safety Information

    Conformity. understood and met. where in the EULA. Keysight shall be under no obligation to update, revise or otherwise modify the Software. With WARNING respect to any technical data as defined by FAR 2.101, pursuant to FAR...

  • Page 3: Certification

    Certification Keysight Technologies certifies that this product met its published specifications at the time of shipment from the factory. Keysight Technologies further certifies that its calibration measurements are traceable to the United States National Institute of Standard and Technology, to the extent allowed by the Institute’s calibration facility, and to the calibration facilities of other International Standard Organization members.

  • Page 4: Equipment Operation

    To prevent electrical shock, do not remove covers. For continued protection against fire hazard, replace the line fuse(s) only with fuses of the same type and rating (for example, normal blow, time delay, etc.). The use of other fuses or material is prohibited. Keysight N1913/1914A Service Guide...

  • Page 5: Safety Considerations

    Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards for design, manufacture, and intended use of the instrument. Keysight Technologies assumes no liability for the customer’s failure to comply with these requirements.

  • Page 6: Safety Symbols

    Three-phase alternating current mode Equipotentiality Note: The instrument is NOT isolated from the mains when the switch is pressed. To isolate the instrument, the mains coupler (mains input cord) should be removed from the power supply. Keysight N1913/1914A Service Guide...

  • Page 7: Environmental Conditions

    – Up to 80% RH at 40°C (non-condensing) Humidity Storage condition – Up to 95% RH at 65°C (non-condensing) Operating condition – Up to 4600 meters (15,000 feet) Altitude Storage condition – Up to 15,240 meters (50,000 feet) Pollution degree Keysight N1913/1914A Service Guide...

  • Page 8: Regulatory Information

    – IEC 61326-1:2005/EN 61326-1:2006 – CISPR11:2003/EN 55011:2007, Group 1 Class A – Canada: ICES/NMB-001:Issue 4, June 2006 – Australia/New Zealand: AS/NZS CISPR 11:2004 Low voltage directive – This product conforms to the requirements of European Council Directive “2006/95/EC”. Keysight N1913/1914A Service Guide...

  • Page 9: Regulatory Markings

    The RCM mark is a registered substance elements are expected to trademark of the Australian leak or deteriorate during normal use. Communications and Media Authority. Forty years is the expected useful life of the product. Keysight N1913/1914A Service Guide...

  • Page 10: Waste Electrical And Electronic Equipment (Weee) Directive 2002/96/Ec

    To return this unwanted instrument, contact your nearest Keysight Service Center, or visit http://about.keysight.com/en/companyinfo/environment/takeback.shtml for more information. Sales and Technical Support To contact Keysight for sales and technical support, refer to the support links on the following Keysight websites: – www.keysight.com/find/epm (product-specific information and support, software and documentation updates) –...

  • Page 11: Table Of Contents

    ..........35 Measurement Characteristics ....... . .41 Keysight N1913/1914A Service Guide...
  • Page 12 ..........61 Keysight N1913/1914A Service Guide...
  • Page 13 ........74 Keysight N1913/1914A Service Guide...
  • Page 14 ......130 Replacing the Calibrator Semi-Rigid/Split Ferrite ....131 Keysight N1913/1914A Service Guide...
  • Page 15 ......134 Before Calling Keysight Technologies ......135 Check the Basics .
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  • Page 17: List Of Figures

    ....129 Figure 6-19 Separate the two halves of the ferrite ... .131 Keysight N1913/1914A Service Guide...
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  • Page 19: List Of Tables

    ..... .38 Table 1-9 U2000 Series settling time ..... .39 Keysight N1913/1914A Service Guide...
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  • Page 21 Keysight N1913/1914A EPM Series Power Meters Service Guide Specifications and Characteristics Introduction Recommended Calibration Interval Power Meter Specifications Power Sensor Specifications Power Meter Supplemental Characteristics Settling Time Measurement Characteristics Rear Panel Inputs and Output Connections 1 mW Power Reference Battery storage conditions...

  • Page 22: Specifications And Characteristics

    50 Ω input is nominal. These two terms are most widely used when describing a product's 'attributes'. – The second group of characteristic types describes 'statistically' the aggregate performance of the population of products. Keysight N1913/1914A Service Guide...

  • Page 23: Recommended Calibration Interval

    30 minutes. – The power meter and power sensor are within their recommended calibration periods. – Used in accordance to the information provided in the Keysight N1913/1914A EPM Series Power Meters User's Guide. Recommended Calibration Interval Keysight Technologies recommends a two-year calibration cycle for the N1913/ 1914A EPM Series Power Meters.

  • Page 24: Power Meter Specifications

    – 90 dB maximum (Keysight E-Series power sensors) – 50 dB maximum (Keysight 8480 Series power sensors) – 55 dB maximum (Keysight N8480 Series power sensors) – 80 dB maximum (Keysight U2000 Series USB power sensors) Display Units Absolute: Watts (W) or dBm...

  • Page 25: Power Sensor Specifications

    Zero Set (digital settability of zero): Power sensor dependent (refer to Table 1-1 Table 1-2). For Keysight E-Series power sensors, this specification applies when zeroing is performed with the sensor input disconnected from the POWER REF. [1] Refer to the power sensor linearity specification in your power sensor manual to assess overall system accuracy.
  • Page 26 ±30 pW R8486D ±50 nW Q8486A ±30 pW Q8486D ±200 nW V8486A ±200 nW W8486A ±50 nW 8487A ±20 pW 8487D E4412A ±50 pW E4413A ±50 pW E9300A ±500 pW E9301A ±500 pW E9304A ±500 pW Keysight N1913/1914A Service Guide...
  • Page 27 N8485A with Option CFT ±63 nW N8486A R with Option CFT ±63 nW N8486A Q with Option CFT ±63 nW N8487A with Option CFT ±63 µW N8481B with Option CFT ±63 µW N8482B with Option CFT Keysight N1913/1914A Service Guide...

  • Page 28: Zero Set (Internal And External) For U2000 Series

    N8481H with Option CFT ±6.3 µW N8482H with Option CFT [a] The zero set specifications are tested with Keysight 11730A power sensor cable, 1.5 m (7.5 ft). [b] The zero set specifications are tested at 50 MHz. Table 1-2 Zero set (internal and external) for U2000 Series...

  • Page 29: Table 1-1 Table

    – U2001A serial prefix MY481/SG481 and above – U2002A serial prefix MY482/SG482 and above – U2004A serial prefix MY484/SG484 and above For power sensors with earlier prefixes, refer to the Keysight U2000 Series USB Power Sensors Operating and Service Guide. Keysight N1913/1914A Service Guide...

  • Page 30: Power Meter Supplemental Characteristics

    32 for x2 mode. Use the “Noise Multiplier” for the appropriate mode (normal or x2) and number of averages to determine the total measurement noise value. For example, for a Keysight 8481D power sensor in normal mode with the number of averages set to 4, the measurement noise is equal to: (<45 pW ×...

  • Page 31: Table 1-7 Table

    <±150 nW <700 nW Keysight E9300A <±150 nW <700 nW Keysight E9301A <±150 nW <700 nW Keysight E9304A <±150 nW <700 nW Keysight E9300B <±150 nW <700 nW Keysight E9301B <±1.5 nW <7 nW Keysight E9300H Keysight N1913/1914A Service Guide...
  • Page 32 Keysight N8482A (exclude Option CFT) <±3 nW <80 nW Keysight N8485A (exclude Option CFT) <±3 nW <80 nW Keysight N8486A R (exclude Option CFT) <±3 nW <80 nW Keysight N8486A Q (exclude Option CFT) <±3 nW <80 nW Keysight N8487A (exclude Option CFT) <±3 nW...

  • Page 33: U2000 Series Power Sensors Specification

    [b] The number of averages at 16 (for normal mode) and 32 (for x2 mode), at a constant temperature, measured over a one minute interval and two standard deviations. For Keysight E-Series power sensors, the measurement noise is measured within the low range. Refer to the relevant power sensor manual for further information.
  • Page 34 [b] The number of averages at 16 (for normal mode) and 32 (for x2 mode), at a constant temperature, measured over a one minute interval and two standard deviations. For Keysight E-Series power sensors, the measurement noise is measured within the low range. Refer to the relevant power sensor manual for further information.

  • Page 35: Settling Time

    Specifications and Characteristics Settling Time For Keysight 8480 Series power sensors 0 to 99% settled readings over the GPIB. Manual filter, 10 dB decreasing power step (refer to Table 1-6). Auto filter, default resolution, 10 dB decreasing power step, normal and x2 speed...

  • Page 36: Figure 1-2 E441X Series Settling Time With Auto-Filter

    0.24 0.45 (x2 mode) [a] E-Series power sensors in Fast mode (using free run trigger), within the range –50 dBm to +17 dBm, the settling time is: N1913A: 10 ms N1914A: 20 ms Normal mode mode Max dBm 80 ms...

  • Page 37: Figure 1-3 E9300 Series Settling Time With Auto-Filter

    –20 dBm times range 120 ms 70 ms –30 dBm 400 ms –40 dBm Low power path 6.5 s 3.4 ms –50 dBm 13 s 6.8 s Min dBm Figure 1-3 E9300 Series settling time with auto-filter Keysight N1913/1914A Service Guide...

  • Page 38: Figure 1-4 N8480 Series Settling Time With Auto-Filter

    Specifications and Characteristics For Keysight N8480 Series power sensors Typical Settling time: 0 to 99% settled readings over the GPIB. Auto filter, default resolution, 10 dB decreasing power step, normal and x2 speed modes (refer to Figure 1-4). Manual filter, 10 dB decreasing power step (refer to Table 1-8).

  • Page 39: U2000 Series Settling Time

    Specifications and Characteristics For Keysight U2000 Series power sensors In FAST mode (using Free Run trigger), for a 10 dB decreasing power step, the settling time is 25 ms Table 1-9 U2000 Series settling time Number of 1024 averages Settling time 0.045 0.09...

  • Page 40: Figure 1-5 U2000 Series Settling Time With Auto-Filter

    20 s -40 dBm 30 dBm 10 dBm 42 s 24 s -50 dBm 40 dBm 20 dBm 42 s 24 s Minimum sensor power within a range Figure 1-5 U2000 Series settling time with auto-filter Keysight N1913/1914A Service Guide...

  • Page 41: Measurement Characteristics

    Maximum measurement speed is obtained using binary output in free run trigger mode. [1] For N1914A, if both channels are used in the fast mode, the measurement speed will be reduced to 200 readings/second for each channel. Keysight N1913/1914A Service Guide...

  • Page 42: Rear Panel Inputs And Output Connections

    100 – 120 Vac Input vol tage range Automatic voltage selection Fluctuations not exceeding ±10% 50 – 60 Hz (100 to 240 Vac) Input frequency range 400 Hz (100 to 120 Vac) Power requirement 70 VA (maximum) Keysight N1913/1914A Service Guide...

  • Page 43: Mw Power Reference

    Factory set to ±0.4% traceable to the National Physical Laboratories (NPL), UK ±1.2% (0 – 55 ºC) Accuracy ±0.4% (25 ±10 ºC) Frequency 50 MHz nominal 1.08 (0 - 55 ºC) 1.05 (typical) Connector type Type N (f), 50 Ω Keysight N1913/1914A Service Guide...

  • Page 44: Battery Storage Conditions

    Specifications and Characteristics Battery storage conditions Storage temperature limits: –20°C to 60°C, ≤ 80% RH Refer to “Battery Information (Optional)” on page 90 of Keysight N1913/1914A NOTE EPM Series Power Meters User’s Guide for more details on the battery pack.

  • Page 45: Physical Characteristics

    The following dimensions exclude front and rear panel protrusions: 212.6 mm W x 88.5 mm H x 348.3 mm D (8.5 in x 3.5 in x 13.7 in) Weight ≤ N1913/1914A weight (net) 3.60 kg (approximately) N1913/1914A weight (shipping) ≤ 8.20 kg (approximately) Keysight N1913/1914A Service Guide...
  • Page 46 Specifications and Characteristics THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight N1913/1914A Service Guide...
  • Page 47 Keysight N1913/1914A EPM Series Power Meters Service Guide Performance Tests Introduction Complete Equipment List 1 mW Power Reference Level Test Output Standing Wave Ratio (SWR) Test Zero Set (Average Path) Absolute Accuracy Test (Average Path) Linearity (Average Path) This chapter contains procedures that allows you to test the power meter’s...

  • Page 48: Performance Tests

    – This document does not provide a complete breakdown for these tests; it only NOTE gives a brief overview of each, in line with Keysight’s recommendation that the Keysight N7800 Series calibration software should be used at all times. – Performance testing is limited to the measurement and verification of warranted specifications.

  • Page 49: Complete Equipment List

    Amplitude range: –30 dBm to +20 dBm SWR: 1.1 at 50 MHz Power Sensor Frequency: 50 MHz E4412A Amplitude range: –70 dBm to +20 dBm SWR: 1.06 maximum Attenuator 20 dB Fixed Attenuator N-type (m,f) 8491B (Option 020) Keysight N1913/1914A Service Guide...
  • Page 50 Cable Assy-Coaxial RG/223 cable 50-Ohm 8120-1839 straight BNC male to straight BNC 24-in LG Calibration Test Cable 11730A required for N1913A and N1914A Sensor Cable 85032B N-Type Calibration Kit 85032B Assorted accessories (cables and adapters) required Keysight N1913/1914A Service Guide...

  • Page 51: Mw Power Reference Level Test

    1 mW power reference level test setup connection diagram For rear panel options, the connections will differ from the illustration shown NOTE here. Refer to the connector identification markings on the rear panel for further details. Keysight N1913/1914A Service Guide...

  • Page 52: Test Method

    DUT. – An adjustment is available for this test if it fails (see Chapter 3, "Adjustments"). Keysight N1913/1914A Service Guide...

  • Page 53: Output Standing Wave Ratio (Swr) Test

    – 1 unit of 11667A, 1 unit of 8481D, and the 30 dB pad combine to create the ‘Calibration System’ – 1 unit of 11667A, 1 unit of 8481D, and the 20 dB pad combine to create the ‘Measurement System’ Keysight N1913/1914A Service Guide...

  • Page 54: Figure 2-2 System Calibration Connection Diagram

    MALE OPEN Figure 2-3 Output SWR test setup-open connection diagram EPM SERIES POWER METER POWER METER Ch A 20 dB ATTENUATOR Load Port N-TYPE POWER SENSOR MALE LOAD Figure 2-4 Output SWR test setup-load connection diagram Keysight N1913/1914A Service Guide...

  • Page 55: Test Method

    – This test cannot be performed manually, due to the complexity of the NOTE equipment calibration procedure, and the complexity of the measurement algorithm. – No adjustment is available for this test if it fails (see Chapter 5, "Troubleshooting Guide"). Keysight N1913/1914A Service Guide...

  • Page 56: Zero Set (Average Path)

    1 Execute the internal zero set measurement procedure for channel A. 2 Read back the result of the measurement from the DUT. 3 If the DUT model number is N1914A, then repeat this procedure for channel B. 4 The test will take a few minutes to complete.

  • Page 57: Absolute Accuracy Test (Average Path)

    – 1 unit of 11730A power sensor cable – 2 units of 10503A BNC cable – 1 unit of BNC T-joint connector (BNC female, male, female) – 1 unit of BNC (female) to dual banana connector Keysight N1913/1914A Service Guide...

  • Page 58: Test Method

    Absolute accuracy test setup The procedure details the key presses required on the Keysight N1913A EPM NOTE Series power meters. For the Keysight N1914A EPM Series power meters, the equivalent key presses should be performed on both channels. Test Method...
  • Page 59 When switching the range calibrator to STANDBY, allow enough time for the NOTE range calibrator to settle to its zero value before attempting to zero the Keysight N1913/1914A EPM Series power meters. This settling would appear on the Keysight N1913/1914A EPM Series power meters display as downward drift.
  • Page 60 ±0.5% 16 dBm 3.66700 V 10 V ±0.5% 17 dBm 4.65200 V 10 V ±0.5% 18 dBm 5.91500 V 10 V ±0.5% 19 dBm 7.53000 V 10 V ±0.5% 20 dBm 9.62300 V 10 V ±0.5% Keysight N1913/1914A Service Guide...

  • Page 61: Linearity (Average Path)

    1 Execute the internal linearity measurement procedure for channel A. 2 Read back the result of the measurement from the DUT. 3 If the DUT model number is N1914A, then repeat this procedure for channel B. 4 The test will take a few minutes to complete.
  • Page 62 Performance Tests THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight N1913/1914A Service Guide...
  • Page 63 Keysight N1913/1914A EPM Series Power Meters Service Guide Adjustments Introduction Power Reference Level Adjustment This chapter contains checks and adjustments that ensure proper performance of the power meter.

  • Page 64: Adjustments

    Power reference level is controlled by the coarse and fine settings of a digital potentiometer. Adjustment of the coarse and fine settings can only be carried out via remote commands. Adjustment can be carried out without having to remove the outer covers from the DUT. Keysight N1913/1914A Service Guide...

  • Page 65: Power Reference Level Adjustment

    SERV:CAL:ADJ:COUR? SERV:CAL:ADJ:FINE <value> SERV:CAL:ADJ:FINE? (Refer to the Keysight N1913/1914A EPM Series Power Meters Programming Guide for further details on the use of these commands.) – COARSE and FINE values are valid in the range of 0 to 1023 – If adjustment is not possible, then a fault may be present in the DUT (see Chapter 5, "Troubleshooting...
  • Page 66 Adjustments THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight N1913/1914A Service Guide...

  • Page 67: Theory Of Operation

    Keysight N1913/1914A EPM Series Power Meters Service Guide Theory of Operation PPMC Assembly Main Board Assembly Calibrator Assembly Front Panel Assembly PSU Assembly This chapter describes how each of the power meter’s individual assemblies operate.

  • Page 68: Ppmc Assembly

    – Control and data lines [from main board and front panel] – LAN/USB communications [from external equipment] – GPIB communications [from external equipment, via main board] Outputs – Control address and datalines [to main board and front panel] Keysight N1913/1914A Service Guide...

  • Page 69: Main Board Assembly

    – Control, address, and data lines [from PPMC] Outputs – Processed average path measurement [to PPMC] – Trigger output and recorder output(s) [to external equipment] – LVDS LCD display control lines [to front panel] – Control and data lines [to PPMC] Keysight N1913/1914A Service Guide...

  • Page 70: Calibrator Assembly

    – Power supplies [from PSU, via main board] – Control, address, and data lines [from PPMC] Outputs – 1 mW (0 dBm) power reference [to external equipment] – Control and data lines [to PPMC, via main board] Keysight N1913/1914A Service Guide...

  • Page 71: Front Panel Assembly

    Front USB port is not to be used with USB flash storage devices. NOTE Outputs – Keypress data [to PPMC, via main board] – Information on the LCD display – Control and data lines [to PPMC, via main board] Keysight N1913/1914A Service Guide...

  • Page 72: Psu Assembly

    – 100 Vac ~240 Vac, 50 Hz ~60 Hz, 150 VA Max [from an external source] – Control lines [from front panel, via main board] Outputs Switching Charger regulation, + Battery d istribution and fil tering Battery Option Keysight N1913/1914A Service Guide...
  • Page 73 Keysight N1913/1914A EPM Series Power Meters Service Guide Troubleshooting Guide Introduction Power-Up Problems Instrument Self-Test Extended Self-Test Performance Test Power Reference Level Adjustment Problems Communication Interface Failures Additional Diagnostic Tests This chapter contains troubleshooting procedures for the EPM Series Power...

  • Page 74: Troubleshooting Guide

    – Green LEDs DS2/DS3: These will flash on and off during normal operation Possible faults – PSU – Main board – Front panel (defective keymat, key flex circuit, or display) – Loose front panel cable (connection to main board) Keysight N1913/1914A Service Guide...

  • Page 75: Instrument Self-Test

    (Note: This does not prove that the average path meets its specifications) ChB CW path Verifies that the average path of Not applicable Main board channel B is working (Note: This does not prove that the average path meets its specifications) Keysight N1913/1914A Service Guide...

  • Page 76: Extended Self-Test

    Calibrator assembly Zero set (average Path) failures Not applicable Main board Linearity (average path) failures Not applicable Main board Power Reference Level Adjustment Problems Possible faults – Calibrator assembly (high probability) – Main board (low probability) Keysight N1913/1914A Service Guide...

  • Page 77: Communication Interface Failures

    USB/LAN interfaces Sensor functionality The N7800 Series software does not Connect an E4412A sensor to the Sensor flex assembly prove both paths of the sensor flex DUT and ensure it can be zeroed/ assembly calibrated Keysight N1913/1914A Service Guide...
  • Page 78 Troubleshooting Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight N1913/1914A Service Guide...
  • Page 79 Keysight N1913/1914A EPM Series Power Meters Service Guide Repair Guide Introduction Replaceable Parts Tools Required Required Torque Values for Fasteners Disassembly Instructions Reassembly Instructions Disassembly vs Part Replacement Front Panel Disassembly Instructions Front Panel Reassembly Instructions Additional Repair Notes Main Board vs. Rear Panel Assembly...

  • Page 80: Repair Guide

    Repair Guide Introduction This chapter contains details of some of the higher level components and assemblies which can be ordered from Keysight Technologies. It also details how to assemble and disassemble the power meter for repair. The contents included are:...

  • Page 81: Replaceable Parts

    Front panel assembly (rear calibrator option) Note: – The front panel assembly must be customized to suit the hardware configuration of the unit being repaired – Refurbished front panel assembly are not available Front panel assembly - Rear calibrator Keysight N1913/1914A Service Guide...
  • Page 82 1 unit of calibrator plug N1912-21003 N1914A (Front connectors option) 1 unit of blank front panel dress label N1912-00027 1 unit of N1914A nameplate N1914-34300 2 units of PLUG-HOLE TR-HD FOR 6960-0024 .688-D-HOLE NYL 1 unit of front panel plug (small)
  • Page 83 E4418-00044 the assembly being replaced (see “Additional Repair Notes” on page 128) Power sensor cable assembly - Front Power sensor cable assembly - Rear N1912-21003 Calibrator plug N1912-21005 Plug - Front panel small N1912- 21005 Keysight N1913/1914A Service Guide...
  • Page 84 Repair Guide Keysight part number Description Visual N1914-34302 Label dual channel - Rear cal N1914-34302 N1912-00027 Label - Dual N1912-00027 N1913-34300 N1913A name plate N1914-34300 N1914A name plate Keysight N1913/1914A Service Guide...
  • Page 85 N1913-36600 Display support Note: This display support molding is used on all variants of the front panel assembly N1913-38300 Keypad Note: This keypad is used on all variants of the front panel assembly Keysight N1913/1914A Service Guide...
  • Page 86 N1912-20005 Window EMI shield Note: This EMI Shielded Window is used on all variants of the Front Panel Assembly N1913-00600 EMI screen Note: This EMI screen is used on all variants of the front panel assembly Keysight N1913/1914A Service Guide...
  • Page 87 Front view Note: This display is used on all variants of the front panel assembly Rear view N1912-60002 Display interface board Note: This display interface board is used on all variants of the front panel assembly Keysight N1913/1914A Service Guide...
  • Page 88 This inverter interface board is used on all variants of the front panel assembly N1912-61002 Cable assembly backlight Note: This backlight cable is used on all variants of the front panel assembly N1912-00038 EMC split washer Keysight N1913/1914A Service Guide...
  • Page 89 Option 105, 106, and 167 N1913-68301 (Single) USB assembly - Single N1913-68302 (Dual) USB assembly - Dual 8121-0936 Flat-Ribbon-Assy- 28-AWG 30-COND 03-IN-LG Note: This flat ribbon cable is used on all variants of the front panel assembly Keysight N1913/1914A Service Guide...
  • Page 90 Keysight part number Description Visual N1913-66502 N1913A mother board [New] N1914-66502 N1914A mother board [New] Note: – Refurbished main boards are not available – The part number for the Lithium Manganese battery (upper- right of both photographs) is 1420-0394 Keysight N1913/1914A Service Guide...
  • Page 91 Description Visual – N1913-66501 Note: (Tested single channel – The same assembly is used for both processor peripheral N1913A and N1914A models component – N1913-66501 (Tested single channel interconnect mezzanine processor peripheral component card PCA) interconnect mezzanine card PCA) comes –...
  • Page 92 Deck assembly (Non-battery option) N1913-00105 Deck assembly - Battery option (Battery option) 0950-5015 Power supply AC-DC Adapter 120-WATT 1-OUTPUT Power supply cover N1913-34102 N1913-37900 Battery pack N1913-61301 Ribbon cable assembly - PSU N1913-61604 Cable assembly - PSU Keysight N1913/1914A Service Guide...

  • Page 93: Rear Panel Assembly

    – The rear panel assembly must be customized to suit the hardware configuration of the unit being repaired – Refurbished rear panel assemblies are not available – The same assemblies are used for both N1913A and N1914A models Keysight N1913/1914A Service Guide...
  • Page 94 6960-0081 1 unit of rear panel plug (Sensor) 6960-0024 2 units of recorder output cable E4418-61015 N1914A (Front connectors option) 2 units of rear panel plug (Sensor) 6960-0024 1 unit of rear panel plug (Calibrator) 6960-0178 2 units of sensor flex assembly...
  • Page 95 Repair Guide Customization parts Keysight part number Description Visual E4418-20009 N- Type connector E4418-00016 Lock washer E4418-20009 2950-0132 Hex nut 2950-0132 3050-0916 Washer 050-0916 E4418-00016 N1913-67300 Sensor flex assembly N1913-67301 E4418-61015 Recorder output cable Keysight N1913/1914A Service Guide...
  • Page 96 Visual N1913-67912 BNC option 6960-0081 BNC plug (rear panel) 6960-0024 Sensor plug (front and rear panels) 6960-0178 Calibrator plug (rear panel) N1913-36200 USB plug (front panel) N1913-36201 USB plug (rear panel) N1913-36202 VGA plug (rear panel) Keysight N1913/1914A Service Guide...

  • Page 97: Additional Spare Parts

    Repair Guide Additional spare parts Keysight part number Description Visual N1913-62700 Line module assembly N1913-67910 VGA option Keysight N1913/1914A Service Guide...
  • Page 98 Repair Guide Keysight part number Description Visual N1912-00016 Spring contact - Perpendicular N1913-61601 Wire hardness assembly - 10 to10 Pins N1913-61600 Ribbon cable assembly - 6 to 4 Pins N1913-60002 PCA - Battery charger Keysight N1913/1914A Service Guide...

  • Page 99: Calibrator Assembly

    “Improved calibrator assembly” on page 100. N1911-61002 Calibrator assembly (Rear connectors option) Note: Semi-rigid cable N1912-61004 is not included with assembly N1911-61002; if this is required, it is available as a separate item Keysight N1913/1914A Service Guide...

  • Page 100: Improved Calibrator Assembly

    The calibrator plug (N1912-21003) will not be needed with the improved calibrator assembly. The N1913/1914A performance will not be affected with the improved calibrator NOTE assembly. Calibrator assembly Improved calibrator assembly Figure 6-1 Calibrator assembly and improved calibrator assembly Keysight N1913/1914A Service Guide...

  • Page 101: Outer Housing Components

    Repair Guide Outer housing components Keysight part number Description Visual N1913-30100 Top clamshell - Non battery option N1913-30101 Top clamshell - Battery option 5041-7718 Clamshell (Bottom) N1912-61005 Fan assembly Keysight N1913/1914A Service Guide...
  • Page 102 Repair Guide Keysight part number Description Visual 34401-86020 Bumper kit 34401-45021 Handle Keysight N1913/1914A Service Guide...

  • Page 103: Sundries

    (see“Additional Repair Notes” on page 128) Tubing-HS 9.5 MM EXP ID 4.80 MM RCVD ID 0.56 MM WTHKNS Split ferrite Cable assembly S-R-Rear option 2110-1334 Line module fuse, 2.5 A/250 V (time-lag) Keysight N1913/1914A Service Guide...

  • Page 104: Tools Required

    – The 9/16” BNC socket is required to socket remove the Trig In/Out fasteners for the majority of N1913/1914A power meters – The trigger socket is required to remove the Trig In/Out fasteners for a minority of N1913/1914A power meters Keysight N1913/1914A Service Guide...

  • Page 105: Required Torque Values For Fasteners

    Fit PSU/PSU safety cover T10 screwdriver 2.37 Nm Fit display to display support molding T6 screwdriver 0.56 Nm Fit calibrator to display support molding T6 screwdriver 0.34 Nm Fit display interface board to inverter board T6 screwdriver 0.56 Nm Keysight N1913/1914A Service Guide...

  • Page 106: Disassembly Instructions

    Keysight N1913A and N1914A power meters. Instructions Visual This procedure focuses primarily on model N1913A and N1914A (i. e. dual channel, with front panel sensor and power reference connectors) N1913A N1914A – Remove the handle. Rotate it to the vertical position. Pull both sides outwards from the body of the unit.

  • Page 107: Figure 6-3 Remove The Top Clamshell

    – Remove the PSU cable guide (Figure 6-4). Use the T10 Torx screwdriver bit to remove the screw attaching the cable guide to the top clamshell. Lift and remove cable guide. Figure 6-4 Remove the PSU safety cover and cable guide Keysight N1913/1914A Service Guide...

  • Page 108: Figure 6-5 Remove The Psu

    Repair Guide Instructions Visual Remove the PSU (Figure 6-5). Use the T10 Torx screwdriver bit to remove the six screws attaching the PSU to the top clamshell. Lift and remove the PSU. Figure 6-5 Remove the PSU Keysight N1913/1914A Service Guide...

  • Page 109: Figure 6-6 Top View With Top Clamshell Removed

    – Disconnect the sensor RF connections from the main board. – Disconnect the sensor flex connection(s) from the main board. – Disconnect the calibrator cable connection from the main board. – Disconnect the analog recorder output connection(s) from the main board. Keysight N1913/1914A Service Guide...

  • Page 110: Figure 6-7 Remove The Emi Earth Wires

    Disconnect the semi-rigid cable (Figure 6-9). Note: This only applies to Option 003 units. Use the 5/16” spanner to disconnect the semi-rigid cable from the N-type connector on the rear panel. Figure 6-9 Disconnect the semi-rigid cable Keysight N1913/1914A Service Guide...

  • Page 111: Figure 6-10 Remove The Front Panel

    PPMC assemblies to the main board. Carefully remove the PPMC assembly by lifting the end closest to the DAP assembly. Carefully remove each DAP assembly by lifting the end closest to the rear panel. Figure 6-11 Remove PPMC Keysight N1913/1914A Service Guide...

  • Page 112: Figure 6-12 Remove The Main Board

    Use the 9/32” socket to remove the GPIB standoffs. Carefully pull the rear panel away from the main board. Figure 6-13 Remove the rear panel Keysight N1913/1914A Service Guide...

  • Page 113: Reassembly Instructions

    – C - Rear, Channel A (for Option 003) – D - Rear, Channel B (for Option 003) J28 - front Ch 1 2 J127 - front Ch 2 3 J23 - rear Ch 2 4 J18 - rear Ch 1 Keysight N1913/1914A Service Guide...

  • Page 114: Figure 6-15 Sensor Flex Connections

    Repair Guide Instructions Visual J112 - USB (rear) 2 J1 - VGA 1 J109 - Calibrator 2 P71 - Trig Out 3 P70 - Trig In 4 J115 - USB (front) Figure 6-15 Sensor flex connections Keysight N1913/1914A Service Guide...

  • Page 115: Figure 6-16 Psu Screw Locations

    PSU screw locations (Figure 6-16) – A - Attach PSU to clamshell (4 screws) – B - Attach PSU cable guide (1 screw) – C - Attach PSU safety cover (4 screws) Figure 6-16 PSU screw locations Keysight N1913/1914A Service Guide...

  • Page 116: Figure 6-17 Psu Cable Routing

    Repair Guide Instructions Visual PSU cable routing (Figure 6-17). Ensure the PSU cables are positioned such that the cable guide does not trap them or pinch them. Figure 6-17 PSU cable routing Keysight N1913/1914A Service Guide...

  • Page 117: Disassembly Vs Part Replacement

    – Disconnect the service connector cable from the PPMC (Rear connectors option) – Dismantle rear USB assembly N1913-68301 or N1913-68302 (if applicable) – Remove the four screws securing the PPMC to the main board – PPMC assembly can now be removed Keysight N1913/1914A Service Guide...
  • Page 118 – Disconnect the sensor RF connections from the main board (Rear connectors option) – Disconnect the sensor flex connection from the main board – Use the N1912-61807 special tooling kit to remove the sensor flex assembly Keysight N1913/1914A Service Guide...

  • Page 119: Front Panel Disassembly Instructions

    – Also note that it may not be necessary to completely disassemble the front panel in order to repair or replace some of its parts. As such, this procedure should be tailored to suit the specific repair requirements. Keysight N1913/1914A Service Guide...
  • Page 120 Use Circlip pliers to remove N1912-61806 sensor flex assembly. Release the tab holding the flex cable to the display interface board, and then disconnect it. Step 3 Disconnect the white plastic plug from the display interface board. Keysight N1913/1914A Service Guide...
  • Page 121 Step 5 Remove the four screws that are attached to the display from the display support molding, and then disconnect it from the display interface board. Keysight N1913/1914A Service Guide...
  • Page 122 Disconnect the backlight cable assembly from the display interface board and inverter board. Step 9 Remove the two screws that are attached to the display inter face board from the inverter board, and separate them from one another. Keysight N1913/1914A Service Guide...
  • Page 123 Step 11 Disengage the rubber tabs that are attached to the key flex circuit from the keymat, and carefully lift it out. Step 12 Remove the EMI shielded window and the keymat from the front panel sub-frame. Keysight N1913/1914A Service Guide...

  • Page 124: Front Panel Reassembly Instructions

    Insert the EMI shielded window into the keymat, ensuring that it is clean and free from fingerprints. Step 3 Overlay the key flex circuit onto the keymat, ensuring that all of the rubber lugs are engaged to hold it securely. Keysight N1913/1914A Service Guide...
  • Page 125 Attach the inverter board to the display interface board using the two screws removed earlier. Step 7 Connect the inverter board to the display interface board using the backlight cable assembly. Note: The cable must be tucked under the plastic clip to prevent any fouling. Keysight N1913/1914A Service Guide...
  • Page 126 Fit the split washer to the calibrator assembly. Step 11 Attach the display to the display interface board using the four screws removed earlier. Step 12 Connect the white plastic plug to the display interface board. Keysight N1913/1914A Service Guide...
  • Page 127 Step 15 Re-fit the calibrator plug. This step is only applicable for calibrator assembly with the calibrator plug. For more information on the improved calibrator assembly, refer to “Improved calibrator assembly” on page 100 Keysight N1913/1914A Service Guide...

  • Page 128: Additional Repair Notes

    The sensor flex assembly is supplied straight. Do not bend the sensor flex cable. Route and connect the sensor flex assembly. Once the sensor flex assembly has NOTE been attached to the power meter, do not bend the sensor flex cable. Keysight N1913/1914A Service Guide...

  • Page 129: Main Board Vs. Rear Panel Assembly

    103 (or newer). – When replacing a revision 102 main board, take note that the rear panel will need to be replaced – Figure 6-18 shows the main board revision markings Figure 6-18 Main board revision markings Keysight N1913/1914A Service Guide...

  • Page 130: Replacing The Ppmc Assembly

    Fitting a PPMC assembly that has been pre-programmed with N1913A firmware NOTE to an N1914A power meter will generate errors; these errors will disappear once the firmware upgrade procedure has been carried out. – Instrument serial number: This can be stored min the PPMC assembly via the command: SERV: SNUM <CHARACTER DATA>...

  • Page 131: Replacing The Calibrator Semi-Rigid/Split Ferrite

    (e. g. RTV) along that 20 mm (¾”) section of the semi-rigid. – Join both halves of the ferrite, keeping the mating surfaces free of the silicone compound if possible. Figure 6-19 Separate the two halves of the ferrite Keysight N1913/1914A Service Guide...
  • Page 132 Repair Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight N1913/1914A Service Guide...
  • Page 133 Keysight N1913/1914A EPM Series Power Meters Service Guide Contacting Keysight Technologies Introduction Before Calling Keysight Technologies Check the Basics Instrument Serial Numbers Returning Your Power Meter for Service Useful Web Pages This chapter details what to do if you have a problem with your power meter.

  • Page 134: Introduction

    135. This section contains a checklist that helps identify some of the most common problems. If you wish to contact Keysight Technologies to enquire about the N1913/1914A EPM Series Power Meters, from service problems to ordering information, refer to “Sales and Technical Support”...

  • Page 135: Before Calling Keysight Technologies

    Contacting Keysight Technologies Before Calling Keysight Technologies Before calling Keysight Technologies or returning the power meter for service, please make the checks listed in “Check the Basics” on page 136. If your power meter is covered by a separate maintenance agreement, please be familiar with the terms.

  • Page 136: Check The Basics

    Problems can be solved by repeating what was being performed when the problem occurred. A few minutes spent in performing these simple checks may eliminate time spent waiting for instrument repair. Before calling Keysight Technologies or returning the power meter for service, please make the following checks: –...

  • Page 137: Instrument Serial Numbers

    – From the front panel (via the Service menu) – From the serial number label The serial number label is attached to the rear of each Keysight Technologies instrument. This label has two instrument identification entries. The first provides the instruments serial number and the second provides the identification number for each option built into the instrument.

  • Page 138: Returning Your Power Meter For Service

    Keysight Technologies. Packaging the power meter for shipment to Keysight for service – Fill in a blue service tag (available at the end of most hardcopy Keysight Service Guides) and attach it to the power meter. Please be as specific as possible about the nature of the problem.

  • Page 139: Useful Web Pages

    Contacting Keysight Technologies Useful Web Pages – Main Product Page www.keysight.com/find/epm – Product Manuals http://www.keysight.com/en/pd-1659613-pn-N1913A/ epm-series-single-channel-power-meter?pm=PL&nid=-536902901.899990&c c=MY&lc=eng – Product Firmware http://www.keysight.com/main/ software.jspx?ckey=1783747&lc=eng&cc=MY&nid=-536902901.899990&id=17 83747 – Performance Test & Calibration Software http://cal.software.keysight.com/ Keysight N1913/1914A Service Guide...
  • Page 140 Contacting Keysight Technologies THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight N1913/1914A Service Guide...
  • Page 141 This information is subject to change without notice. Always refer to the Keysight website for the latest revision. © Keysight Technologies 2009 - 2016 Edition 14, November 18, 2016 Printed in Malaysia *N1913-90009* N1913-90009 www.keysight.com...

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N1913

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