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Summary of Contents for Keysight Technologies N8480 Series
- Page 1 Keysight N8480 Series Power Sensors Operating and Service Guide...
- Page 4 FAR 12.211 (Technical Data) and 12.212 (Computer Software) and, for the Department of Defense, DFARS 252.227-7015 (Technical Data - Commercial Items) and DFARS 227.7202-3 (Rights in Commercial Computer Software or Com- puter Software Documentation). N8480 Series Power Sensors Operating and Service Guide...
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Page 5: Safety Symbols
This symbol indicates that a device, or part of a device, may be susceptible to electrostatic discharges (ESD) which can result in damage to the product. Observe ESD precautions given on the product, or its user documentation, when handling equipment bearing this mark. N8480 Series Power Sensors Operating and Service Guide... -
Page 6: Regulatory Markings
Directive (2002/96/EC) marking equipment. The affixed product label Cet appareil ISM est conforme à la indicates that you must not discard norme NMB-001 du Canada. this electrical/electronic product in domestic household waste. N8480 Series Power Sensors Operating and Service Guide... -
Page 7: General Safety Information
Keysight Technologies assumes no liability for the customer’s failure to comply with these requirements. Before connecting the power sensor to other instruments ensure that all WA R N I N G instruments are connected to the protective (earth) ground. -
Page 8: Waste Electrical And Electronic Equipment (Weee) Directive 2002/96/Ec
“Monitoring and Control Instrument” product. The affixed product label is shown as below: Do not dispose in domestic household waste To return this unwanted instrument, contact your nearest Keysight office, or visit www.keysight.com/environment/product for more information. N8480 Series Power Sensors Operating and Service Guide... -
Page 9: Environmental Conditions
Non-operating up to 90% at 65 °C (Non-condensing) Altitude Non-operating up to 7,620 metres (25,000 feet) The N8480 Series power sensors complies with the following EMC C A U T I O N requirements: • IEC 61326-1:2005/EN 61326-1:2006 • Canada: ICES/NMB-001:2004 •... - Page 10 Web site. You can search the DoC by its product model or description. http://www.keysight.com/go/conformity If you are unable to search for the respective DoC, please contact your N O T E local Keysight representative. viii N8480 Series Power Sensors Operating and Service Guide...
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Page 11: In This Guide
Chapter 2 describes the specifications and characteristics of the N8480 Series power sensors. Service Chapter 3 elaborates on the information about principle of operations, troubleshooting, and repair of the N8480 Series power sensors. N8480 Series Power Sensors Operating and Service Guide... - Page 12 THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. N8480 Series Power Sensors Operating and Service Guide...
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Page 13: Table Of Contents
Recommended Calibration Interval 6 Temperature Sensitivity 6 Operating Instructions 7 Modulation Effect 8 Torque 8 Overview of the N8480 Series Power Sensors 9 N8485A Power Sensor 12 N8487A Power Sensor 12 N8488A Power Sensor 13 B-models and H-models Information 13... - Page 14 Standing Wave Ratio (SWR) and Reflection Coefficient (Rho) Performance Test 48 Zero Set Performance Test 51 Replaceable Parts 53 Troubleshooting 59 Repair 59 Diassembly/Reassembly Procedures 60 Diassembly Procedure 60 Reassembly Procedure 60 N8480 Series Power Sensors Operating and Service Guide...
- Page 15 Figure 1-2 Connecting a sensor cable to power meter 5 Figure 1-3 Connecting waveguide flange to the N8486AQ power sensor 7 Figure 1-4 N8480 Series power sensor simplified block diagram 11 Figure 1-5 N8485A power sensor with adapter 12 Figure 1-6 N8487A power sensor with adapter 12...
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- Page 17 Table 2-10 Calibration factor uncertainty at 0 ºC to 55 ºC 42 Table 2-11 Physical dimensions 44 Table 3-1 Reflection coefficient for N8480 Series power sensors (25 ºC ± 10 ºC) 49 Table 3-2 Replaceable parts list for standard N8480 Series power sensors 55...
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Page 19: Introduction
Recommended Calibration Interval 6 Temperature Sensitivity 6 Operating Instructions 7 Modulation Effect 8 Torque 8 Overview of the N8480 Series Power Sensors 9 N8485A Power Sensor 12 N8487A Power Sensor 12 N8488A Power Sensor 13 B-models and H-models Information 13... -
Page 20: General Information
General Information This guide contains information about the initial inspection, connections, specifications, operation, and performance tests of the N8480 Series power sensors. You can also find a copy of this guide on the EPM and EPM- P Series Power Meter Documentation CD supplied with the power meter. -
Page 21: Initial Inspections
Keysight Sales and Service Offices on the last page of this guide. • Ensure you have read and understand the preceding safety information before proceed. Accessories Shipped with the Instrument The following items are shipped with every purchase of N8480 Series power sensor: • Certificate of Calibration •... -
Page 22: Power Meter And Sensor Cable Requirements
Introduction Power Meter and Sensor Cable Requirements Table 1- 1 lists the length of cable option for the N8480 Series power sensors. Table 1-1 Power sensor cable options Power Sensor Cable Option Description Supported Power Meter 11730 Family Sensor Cables (Grey) 11730A 1.5 m (5-ft) cable length... -
Page 23: Interconnection And Calibration
Introduction Interconnection and Calibration Connect one end of the supported sensor cable to the N8480 Series power sensor and connect the other end of the cable to the power meter’s channel input. Allow approximately four seconds for the power meter to download the data from the power sensor’s EEPROM. -
Page 24: Recommended Calibration Interval
It is recommended to perform frequent zeroing when performing measurements below N O T E –25 dBm. Recommended Calibration Interval Keysight Technologies recommends a one year calibration cycle for the N8480 Series power sensors. Temperature Sensitivity The sensitivity of the power sensor is influenced by ambient temperature. -
Page 25: Operating Instructions
Insert this screw, and the one opposite (hidden under the instrument) as shown in the diagram. Figure 1-3 Connecting waveguide flange to the N8486AQ power sensor N8480 Series Power Sensors Operating and Service Guide... -
Page 26: Modulation Effect
8 lb-in Waveguide Flange 3/32 inch N8486AQ N8486AQ-100 3.75 lb-in UG-383/U Balldriver-Hex Waveguide flange 3/32 inch N8486AR N8486AR-100 3.75 lb-in UG-599/U Balldriver-Hex Balldriver is used to tighten the screws, instead of the connector. N8480 Series Power Sensors Operating and Service Guide... -
Page 27: Overview Of The N8480 Series Power Sensors
• Waveguide- models (–35 dBm to +20 dBm) • N8486AQ and N8486AR The calibration factor table stored in the EEPROM is not applicable for N8480 Series sensors with Option CFT. Except for N8488A power sensor. N8488A power sensor is a newly introduced high frequency sensor. -
Page 28: Table 1-3 Power Range In Range Setting
Meanwhile, the N8480 sensors with Option CFT (except for N8488A) only measure power levels from –30 dBm to +44 dBm (1 µW to 25.1 W) in single range. Similiar to the E- Series power sensors, the N8480 Series power sensors are also equipped with EEPROM to store sensor’s characteristics such as model number, serial number, linearity, temperature compensation, calibration factor, and so forth. -
Page 29: Figure 1-4 N8480 Series Power Sensor Simplified Block Diagram
Power Supply I2C Remote I/O I2C Buffer Circuit EEPROM Figure 1-4 N8480 Series power sensor simplified block diagram Figure 1- 4 illustrates a basic power sensor block diagram for thermocouple power sensing elements. From the RF or microwave signal input, the thermocouple detector mounts generate a very low voltage — in the order of nV. -
Page 30: N8485A Power Sensor
The 2.4 mm to Type-N adapter is intended for the use of 1 mW, 50 MHz power reference of N O T E the power meter only. Its function as a calibration reference may be compromised if it is used for other purpose. N8480 Series Power Sensors Operating and Service Guide... -
Page 31: N8488A Power Sensor
The attenuator and sensor assemblies are calibrated as a set and must be used together when a specified accuracies are to be obtained. These combination is referred to as a power sensor. N8480 Series Power Sensors Operating and Service Guide... -
Page 32: Waveguide-Models Information
Beryllium oxide in powder form ia a hazardous material and may be harmful to your health if inhaled. Do not perform any operation on the beryllium oxide that might generate dust. • Defective attenuator should be returned to Keysight Technologies for proper disposal. Waveguide-models Information The waveguide power sensors (excluding Option CFT) measure power levels from –35 dBm to +20 dBm at frequencies from 26.5 GHz to 50 GHz. -
Page 33: Options
For Option CFT specifications and characteristics, see Chapter 2, “Specifications and Characteristics.” • The calibration factor table stored in the EEPROM is not applicable for N8480 Series power N O T E sensors with Option CFT. -
Page 34: Power Meter Firmware Compatibility
Introduction Power Meter Firmware Compatibility Before using the N8480 Series power sensors, make sure the power meter is using the latest firmware as shown in Table 1- 4. This is to ensure that the power meter is compatible with N8480 Series power sensors. -
Page 35: Power Meter Configuration Changes
Power Meter Configuration Changes The Keysight EPM Series, EPM- P Series, or P- Series power meters recognize the Keysight N8480 Series power sensor when it is connected. The N8480 Series power sensors (excluding Option CFT) calibration data is automatically read by the power meter. In addition, the auto- averaging... -
Page 36: Measurement Accuracy And Speed
Measurement Accuracy and Speed The power meter has no internal ranges. The only ranges you can set are those of the Keysight N8480 Series power sensors and other Keysight E- Series power sensors. With a Keysight N8480 Series power sensor (excluding Option CFT) or E- Series power sensor, the range can be set either automatically or manually. -
Page 37: Specifications And Characteristics
N8480 Series Power Sensors Operating and Service Guide Specifications and Characteristics Specification Definitions 20 Warranted Specifications 20 Characteristic Specifications 20 Conditions 21 Specifications 22 Frequency and Dynamic Power Range 22 Damage Level 23 Maximum SWR 24 Power Linearity 31 Switching Point 35... -
Page 38: Specification Definitions
50 W input Type- N connector. In these examples product weight is an approximate value and a 50 W input is nominal. These two terms are most widely used when describing a product's 'attributes'. N8480 Series Power Sensors Operating and Service Guide... -
Page 39: Conditions
30 minutes. • The power meter and power sensor are within their recommended calibration periods. • Used in accordance to the information provided in the power meter’s User's Guide. N8480 Series Power Sensors Operating and Service Guide... -
Page 40: Specifications
Specifications and Characteristics Specifications • Specifications stated in this chapter refer to all N8480 Series power sensors unless N O T E otherwise stated. • The term “standard” used in table under the Sensor Option column is refering to all N8480 Series power sensors except Option CFT. -
Page 41: Damage Level
Sensor Model (Average Power) (Peak Power) N8481A N8482A N8485A N8487A +25 dBm 15 W/2 µs N8488A N8486AR N8486AQ N8481B +49 dBm 500 W/1 µs N8482B N8481H +40 dBm 100 W/1 µs N8482H N8480 Series Power Sensors Operating and Service Guide... -
Page 42: Maximum Swr
12.4 GHz to 18 GHz 1.12 1.14 N8488A 18 GHz to 26.5 GHz 1.21 1.23 26.5 GHz to 40 GHz 1.30 1.31 40 GHz to 67 GHz 1.46 1.47 67 GHz to 70 GHz 1.48 1.50 N8480 Series Power Sensors Operating and Service Guide... -
Page 43: Figure 2-1 Typical Swr, 10 Mhz To 18 Ghz (25 °C ±10 °C) For N8481A Power Sensor
SWR for 50 MHz calibration port . Type-N (m) coaxial connector is used in the 50 MHz calibration. 1.20 1.18 1.16 1.14 1.12 1.10 1.08 1.06 1.04 1.02 Frequency (GHz) Figure 2-1 Typical SWR, 10 MHz to 18 GHz (25 °C ±10 °C) for N8481A power sensor N8480 Series Power Sensors Operating and Service Guide... -
Page 44: Figure 2-2 Typical Swr, 100 Khz To 6 Ghz (25 °C ±10 °C) For N8482A Power Sensor
Figure 2-2 Typical SWR, 100 kHz to 6 GHz (25 °C ±10 °C) for N8482A power sensor 1.20 1.18 1.16 1.14 1.12 1.10 1.08 1.06 1.04 1.02 Frequency (GHz) Figure 2-3 Typical SWR, 10 MHz to 26.5 GHz (25 °C ±10 °C) for N8485A power sensor N8480 Series Power Sensors Operating and Service Guide... -
Page 45: Figure 2-4 Typical Swr, 50 Mhz To 50 Ghz (25 °C ±10 °C) For N8487A Power Sensor
Figure 2-4 Typical SWR, 50 MHz to 50 GHz (25 °C ±10 °C) for N8487A power sensor 1.30 1.25 1.20 1.15 1.10 1.05 Frequency (GHz) Figure 2-5 Typical SWR, 10 MHz to 70 GHz (25 °C ±10 °C) for N8488A power sensor N8480 Series Power Sensors Operating and Service Guide... -
Page 46: Figure 2-6 Typical Swr, 33 Mhz To 50 Ghz (25 °C ±10 °C) For N8486Aq Power Sensor
1.20 1.18 1.16 1.14 1.12 1.10 1.08 1.06 1.04 26.5 31.5 41.5 36.5 Frequency (GHz) Figure 2-7 Typical SWR, 26.5 GHz to 40 GHz (25 °C ±10 °C) for N8486AR power sensor N8480 Series Power Sensors Operating and Service Guide... -
Page 47: Figure 2-8 Typical Swr, 10 Mhz To 18 Ghz (25 °C ±10 °C) For N8481B Power Sensor
Figure 2-8 Typical SWR, 10 MHz to 18 GHz (25 °C ±10 °C) for N8481B power sensor 1.028 1.026 1.024 1.022 1.020 1.018 1.016 1.014 1.012 1.01 Frequency (GHz) Figure 2-9 Typical SWR, 100 kHz to 6 GHz (25 °C ±10 °C) for N8482B power sensor N8480 Series Power Sensors Operating and Service Guide... -
Page 48: Figure 2-10 Typical Swr, 10 Mhz To 18 Ghz (25 °C ±10 °C) For N8481H Power Sensor
Figure 2-10 Typical SWR, 10 MHz to 18 GHz (25 °C ±10 °C) for N8481H power sensor 1.09 1.08 1.07 1.06 1.05 1.04 1.03 1.02 1.01 Frequency (GHz) Figure 2-11 Typical SWR, 100 kHz to 6 GHz (25 °C ±10 °C) for N8482H power sensor N8480 Series Power Sensors Operating and Service Guide... -
Page 49: Power Linearity
Specifications and Characteristics Power Linearity After zero and calibration at ambient environment conditions. The N8480 Series power sensors’ linearity is negligible except for the power range N O T E specified in Table 2-4. Table 2-4 Power linearity Linearity Linearity... -
Page 50: Figure 2-12 Typical N8481/2/5/7/8A And N8486Ar/Aq Power Linearity At 25 °C, After Zero And Calibration With Associated Measurement Uncertainty
Figure 2-12 Typical N8481/2/5/7/8A and N8486AR/AQ power linearity at 25 °C, after zero and calibration with associated measurement uncertainty N8481/2/5/7/8A –1 dBm to +10 dBm +10 dBm to +15 dBm +15 dBm to +20 dBm and N8486AR/AQ Measurement ±0.35 ±0.35 ±0.35 Uncertainty (%) N8480 Series Power Sensors Operating and Service Guide... -
Page 51: Figure 2-13 Typical N8481/2B Power Linearity At 25 °C, After Zero And Calibration With
Figure 2-13 Typical N8481/2B power linearity at 25 °C, after zero and calibration with associated measurement uncertainty N8481/2B +29 dBm to +40 dBm +40 dBm to +44 dBm Measurement ±0.35 ±1.21 Uncertainty (%) N8480 Series Power Sensors Operating and Service Guide... -
Page 52: Figure 2-14 Typical N8481/2H Power Linearity At 25 °C, After Zero And Calibration With
Figure 2-14 Typical N8481/2H power linearity at 25 °C, after zero and calibration with associated measurement uncertainty N8481/2H +17 dBm to +30 dBm +30 dBm to +35 dBm Measurement ±0.60 ±2.39 Uncertainty (%) N8480 Series Power Sensors Operating and Service Guide... -
Page 53: Switching Point
Specifications and Characteristics Switching Point Switching point is applicable for standard N8480 Series power sensors only. N O T E The N8480 Series power sensors have two power measurement ranges; a lower range and upper range. The power meter automatically selects the proper power range. -
Page 54: Zero Set, Zero Drift And Measurement Noise
3 The number of averages at 16 for normal mode and 32 for x2 mode, at a constant temperature, measured over one minute interval and two standard deviations. 4 The zero set, zero drift, and measurement noise specifications are tested at 50 MHz. 5 N/A is the abbreviation for “not applicable”. N8480 Series Power Sensors Operating and Service Guide... -
Page 55: Settling Time
10 dB 3.6 s 5 dB 13.5 s 5 dB 6.6 s Minimum sensor power Minimum sensor power Figure 2-15 Autofilter, default resolution, 10 dB decreasing power step (not across the switching point) N8480 Series Power Sensors Operating and Service Guide... -
Page 56: Calibration Factor And Reflection Coefficient
Do not assume the typical measurement uncertainty listed in this guide as the maximum N O T E calibration factor measurement uncertainty. Only applicable with the purchase of Option 1A7 or Option A6J. N8480 Series Power Sensors Operating and Service Guide... -
Page 57: Calibration Factor Uncertainty
3.19 3.14 34 GHz to 35 GHz 2.80 3.19 3.40 35 GHz to 40 GHz 2.80 3.19 3.14 40 GHz to 45 GHz 3.66 3.19 45 GHz to 50 GHz 4.23 3.26 N8480 Series Power Sensors Operating and Service Guide... -
Page 58: Table 2-9 Calibration Factor Uncertainty At 25 ºc ± 10 ºc
1.91 1.15 1.08 1.94 1.00 1.2 GHz to 6 GHz 1.23 1.97 1.42 1.81 2.68 1.19 6 GHz to 14 GHz 1.85 2.69 3.87 14 GHz to 18 GHz 2.17 3.20 7.01 N8480 Series Power Sensors Operating and Service Guide... - Page 59 2 GHz to 12.4 GHz 2.45 12.4 GHz to 18 GHz 2.89 18 GHz to 26.5 GHz 3.52 16.5 GHz to 50 GHz 4.99 50 GHz to 67 GHz 6.46 67 GHz to 70 GHz 7.29 N8480 Series Power Sensors Operating and Service Guide...
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Page 60: Table 2-10 Calibration Factor Uncertainty At 0 ºc To 55 ºc
4.25 6.04 34 GHz to 35 GHz 4.84 4.25 6.04 35 GHz to 40 GHz 4.84 4.25 6.04 40 GHz to 45 GHz 5.70 5.86 45 GHz to 50 GHz 6.19 6.59 N8480 Series Power Sensors Operating and Service Guide... -
Page 61: Supplemental Characteristics
Typical CF and SWR vs. Frequency 1.25 1.15 Typical CF Typical SWR 1.05 0.95 0.05 Frequency (GHz) Figure 2-16 Typical cal factor and SWR vs. frequency N8480 Series Power Sensors Operating and Service Guide... -
Page 62: Physical Characteristics
Shipping: 1.404 kg (3.09 lb) N8481H 38 mm W x 30 mm H x 174 mm L Net: 0.234 kg (0.52 lb) N8482H (1.5 in X 1.2 in X 6.8 in) Shipping: 0.954 kg (2.10 lb) N8480 Series Power Sensors Operating and Service Guide... -
Page 63: Service
Performance Test 48 Zero Set Performance Test 51 Replaceable Parts 53 Troubleshooting 59 Repair 59 Diassembly/Reassembly Procedures 60 Diassembly Procedure 60 Reassembly Procedure 60 This chapter contains information about principle of operations, troubleshooting, and repair of the Keysight N8480 Series power sensors. -
Page 64: Cleaning
Service Cleaning Use a clean, damp cloth to clean the body of the N8480 Series power sensors. Connector Care A solution of pure isopropyl or ethyl alchohol can be used to clean connectors but make sure to keep in mind on its flammable nature. -
Page 65: Principle Of Operations
The Keysight EPM Series, EPM- P Series, or P- Series power meters automatically detects the power sensor when a Keysight N8480 Series power sensor is connected and downloads the correction data from the sensor’s EEPROM. -
Page 66: Performance Test
The true position of the holes relative to each other are held to a diameter tolerance of 0.0254 mm (0.001 in). The holes are held to 1.664 mm (0.0655 in) minimum diameter while the pins are held to 1.61 mm (0.0634 in) maximum diameter. N8480 Series Power Sensors Operating and Service Guide... -
Page 67: Table 3-1 Reflection Coefficient For N8480 Series Power Sensors (25 ºc ± 10 ºc)
Service Table 3-1 Reflection coefficient for N8480 Series power sensors (25 ºC ± 10 ºC) Actual Maximum System Rho Sensor Model Frequency Uncertainty Measurement 10 MHz to 30 MHz ±0.007 0.157 30 MHz to 50 MHz ±0.005 0.067 N8481A 50 MHz to 2 GHz ±0.005... - Page 68 Service Table 3-1 Reflection coefficient for N8480 Series power sensors (25 ºC ± 10 ºC) Actual Maximum System Rho Sensor Model Frequency Uncertainty Measurement 10 MHz to 100 MHz ±0.005 0.016 100 MHz to 2.4 GHz ±0.004 0.018 2.4 GHz to 12.4 GHz ±0.004...
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Page 69: Zero Set Performance Test
Recommended power meter: N1913A, N1914A Recommended 50 MHz, 50 Ω load: 85138B Procedure 1 Connect the DUT (N8480 Series) to the power meter (N1913A) as shown in the following diagram. Then, launch the Keysight IO Libraries Suite on the computer. - Page 70 14 Repeat step 13 for 10 times and then calculate the mean value of the readings. 15 Compare the calculated mean value to the system specification. If the test fails, refer to “Repair” on page N8480 Series Power Sensors Operating and Service Guide...
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Page 71: Replaceable Parts
Service Replaceable Parts Figure 3- 1 illustrates the parts breakdown of the N8480 Series power sensors that identifies all the replaceable parts. If you want to order a part, quote the Keysight part number, specify the quantity required, and address the order to the nearest Keysight office. -
Page 72: Figure 3-1 Illustrated Parts Breakdown
Service MP 4 Figure 3-1 Illustrated Parts Breakdown N8480 Series Power Sensors Operating and Service Guide... -
Page 73: Table 3-2 Replaceable Parts List For Standard N8480 Series Power Sensors
Service Table 3-2 Replaceable parts list for standard N8480 Series power sensors Reference Option Part Number Quantity Description Designaton N8481A (Type-N) N8481A-100 N8481-60007 replacement module N8481A N8481A (APC-7) N8481A-200 N8481-60008 replacement module N8482A (Type-N) N8482A N8482A-100 N8482-60002 replacement module N8485A (3.5 mm) - Page 74 Service Table 3-2 Replaceable parts list for standard N8480 Series power sensors Reference Option Part Number Quantity Description Designaton Label-ID top N8485-84303 (N8485A Option 033) N8487-84301 Label-ID top (N8487A) N8488-84301 Label-ID top (N8488A) N8486-84301 Label-ID top (N8486AR) N8486-84302 Label-ID top (N8486AQ)
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Page 75: Table 3-3 Replaceable Parts List For N8480 Series Power Sensors With Option Cft
Service Table 3-3 Replaceable parts list for N8480 Series power sensors with Option CFT Reference Option Part Number Quantity Description Designaton N8481A (Type-N) replacement N8481A-100 N8481-60009 module, CFT Option N8481A N8481A (APC-7) replacement N8481A-200 N8481-60010 module, CFT Option N8482A (Type-N) replacement... -
Page 76: Table 3-4 Replacement Part List For Adapters Used On N8480 Series Power Sensors
Service Table 3-3 Replaceable parts list for N8480 Series power sensors with Option CFT Reference Option Part Number Quantity Description Designaton N8486-84304 Label-ID top (N8486AQ) N8481-84310 Label-ID top (N8481B) N8482-84309 Label-ID top (N8482B) N8481-84311 Label-ID top (N8481H) N8482-84310 Label-ID top (N8482H) -
Page 77: Troubleshooting
Repair There is no serviceable parts inside the N8480 Series power sensors. If the power sensor is defective, send it back to the nearest Keysight Service Center for repair. The entire “module” of the defective power sensor will... -
Page 78: Diassembly/Reassembly Procedures
• Pry alternately at both sides of the connector until the plastic shells are apart. Remove the shells and the magnetic shields. Figure 3-2 Removing power sensor shell Reassembly Procedure Replace the magnetic shields and the plastic shells. Snap the plastic shells together. N8480 Series Power Sensors Operating and Service Guide... - Page 79 www.keysight.com Contact us To obtain service, warranty, or technical sup- port assistance, contact us at the following phone numbers: United States: (tel) 800 829 4444 (fax) 800 829 4433 Canada: (tel) 877 894 4414 (fax) 800 746 4866 China: (tel) 800 810 0189 (fax) 800 820 2816 Europe: (tel) 31 20 547 2111...
- Page 80 This information is subject to change without notice. © Keysight Technologies 2003 – 2015 Edition 12, June 26, 2015 *N8481-90000* N8481-90000 www.keysight.com...
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