Related Manuals for Keysight Technologies N4377A
Summary of Contents for Keysight Technologies N4377A
- Page 1 Keysight N4377A Lightwave Detector Wide operating frequency range calibrated lightwave detector User's Guide...
- Page 2 APPLICABLE LAW, KEYSIGHT DISCLAIMS conditions are fully understood and found at ALL WARRANTIES, EITHER EXPRESS OR met. http://www.keysight.com/find/sweula. IMPLIED WITH REGARD TO THIS MANUAL AND ANY INFORMATION CONTAINED HEREIN, INCLUDING BUT NOT LIMITED TO Keysight N4377A Lightwave Detector User’s Guide...
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Page 3: Safety Summary
Failure to comply with these precautions or with specific warnings or operating instructions in this product manual violates safety standards of design, manufacture, and intended use of the instrument. Keysight Technologies assumes no liability for the customer's failure to comply with these requirements. -
Page 4: Regulatory Markings
ICES/NMB-001 indicates that this ISM product complies with the Canadian ICES-001. Cet appareil ISM est conforme a la norme NMB-001 du Canada. ISM GRP.1 Class A indicates that this is an Industrial Scientific and Medical Group 1 Class A product. Keysight N4377A Lightwave Detector User’s Guide... -
Page 5: Environmental Conditions
Environmental Conditions The N4377A is designed for indoor use in an area classifying as pollution degree 2. The table below shows the general environmental requirements for this instrument. Table 2 N4377A Environmental Conditions Environment condition Requirement Temperature Operating condition +10 °C to +40 °C Storage condition –40 °C to 70 °C... -
Page 7: Table Of Contents
1 Getting Started Overview Theory of Operation Initial Inspection Standard shipped items 2 Remote Programming Remote Programming Overview Instructions Instruction Header White Space (Separator) Braces Ellipsis Square Brackets Program Data Calibration Commands [:CALibration]:ZERO [:CALibration]:ZERO? Keysight N4377A Lightwave Detector User’s Guide... - Page 8 [:MMEMory]:CORRection? 3 Using the N4377A N4377A Remote Access Using S2P Compensation Data Deembedding the N4377A's response on a network analyzer 4 Characteristics and Specifications 5 Maintenance and Operating Precautions Cleaning the Fiber-Optic Connectors To clean a front-panel fiber-optic input connector...
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Page 9: Getting Started
Keysight N4377A Lightwave Detector User’s Guide Getting Started / 10 Overview / 11 Theory of Operation / 12 Initial Inspection This chapter provides an overview of N4377A lightwave detector. -
Page 10: Overview
USB connector Used to power and control the Lightwave Detector by connecting it to a PC-based instrument such as a Vector Network Analyzer. The N4377A supports the USBTMC protocol for programming. Additionally, S-Parameter compensation data can be downloaded from the device. -
Page 11: Theory Of Operation
Getting Started Theory of Operation The N4377A lightwave detector utilizes a reverse biased photodiode to convert optical power to an electrical current. The photodiode’s output is directly connected to the ruggedized RF output port for easy connection to instruments such as spectrum or network analyzers. Additionally, the bias voltage supply senses and digitizes the current flowing into the photodiode. -
Page 12: Initial Inspection
Getting Started Initial Inspection When you receive the N4377A lightwave detector, inspect the shipping container for damages. If the shipping container or packaging material is damaged, it should be kept until the contents of the shipment have been checked mechanically and electrically. If there is any mechanical damage, notify the nearest Keysight Sales and Service Office. -
Page 13: Remote Programming
Keysight N4377A Lightwave Detector User’s Guide Remote Programming / 14 Remote Programming Overview / 16 Calibration Commands / 17 Configure Commands / 19 Common Commands / 20 Read Commands / 21 System Commands / 22 Memory Command... -
Page 14: Remote Programming Overview
Remote Programming Remote Programming Overview This chapter introduces the basic concepts of remote programming of an N4377A Lightwave Detector using SCPI commands. Instructions Instructions, both commands and queries, normally appear as strings embedded in a statement of your host language, such as Visual Basic for Applications (VBA), Visual Basic, Python, .NET, C#, C, etc. -
Page 15: Square Brackets
Each instruction's syntax definition shows the program data and the values they accept. When there is more than one data parameter, they are separated by commas (,). You can add spaces around the commas to improve readability. Keysight N4377A Lightwave Detector User’s Guide... -
Page 16: Calibration Commands
0: No autozero has been run yet, using values from factory 1: Autozero is running 2: Autozero completed successfully 3: Autozero has failed due to optical power being present, factory values have been restored Example ZERO? → 2<END> Keysight N4377A Lightwave Detector User’s Guide... -
Page 17: Configure Commands
Parameters 0: dBm 1: Watt WATT Response None Example UNIT WATT :[CONFigure][:POWer]:UNIT? Query :[CONFigure][:POWer]:UNIT? Syntax :[CONFigure][:POWer]:UNIT? Description Queries the power unit Parameters None Response Integer value: 0: dBm, 1: Watt Example UNIT? → 1<END> Keysight N4377A Lightwave Detector User’s Guide... -
Page 18: [Configure][:Power]:Wavelength
Returns the last wavelength set. For min/max/def the value specified by the symbolic constant is returned. Parameters MIN: minimum programmable value MAX: maximum programmable value DEF: default value Response The wavelength as a float value in meters. Example WAV? → 1.55e-6<END> Keysight N4377A Lightwave Detector User’s Guide... -
Page 19: Common Commands
Remote Programming Common Commands *OPT? Query *OPT? Syntax *OPT? Description Returns the installed option. Parameters None Response String: S40/M40/S70 Example *OPT? → S70<END> Keysight N4377A Lightwave Detector User’s Guide... -
Page 20: Read Commands
The last valid power reading as a float value in dBm or W as set by the :[CONFigure][:READ]:UNit command. Example READ? → -0.284116<END> :[READ]:TEMPerature? Query :[READ]:TEMPerature? Syntax :[READ]:TEMPerature? Description Returns the temperature of the optical assembly. Parameters None Response Optical assembly temperature in degree Celsius. Example TEMP? → 31.4159 Keysight N4377A Lightwave Detector User’s Guide... -
Page 21: System Commands
Remote Programming System Commands :SYSTem:PON:TIME? Query :SYSTem:PON:TIME? Syntax :SYSTem:PON:TIME? Description Returns the duration the instrument has been powered on. Parameters None Response Time since power up in seconds. Example SYST:PON:TIME? → 1337<END> Keysight N4377A Lightwave Detector User’s Guide... -
Page 22: Memory Command
DEF: default value (1550 nm for options S40, S70; 850 nm for option M40) The power as a float value in the unit specified by :[CONFigure][:POWer]:UNIT Response S2P data Example CORR? 1310nm → <S2P data> Keysight N4377A Lightwave Detector User’s Guide... - Page 23 Keysight N4377A Lightwave Detector User’s Guide Using the N4377A / 24 N4377A Remote Access / 30 Using S2P Compensation Data...
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Page 24: N4377A Remote Access
You can use the Remote IO Server included in the Keysight IO Libraries to program the N4377A without a direct USB connection. To do so, follow the steps below: On the Windows-based instrument that your N4377A is connected to, do the following: a Open the Keysight Connection Expert. - Page 25 N4377A Remote Access c In the Settings window, select the Enable Remote IO Server check box, and then click OK. Keysight N4377A Lightwave Detector User’s Guide...
- Page 26 N4377A Remote Access d Confirm that the Remote IO Server is On. Keysight N4377A Lightwave Detector User’s Guide...
- Page 27 N4377A Remote Access On the Windows-based instrument from which you want to access the N4377A, do the following: a Go to My Instruments pane, click Add, and then select Remote USB interface. Keysight N4377A Lightwave Detector User’s Guide...
- Page 28 In the Add Remote USB interface window, type the host name or IP address of the computer running the Remote IO Server, and then click OK. All other settings can be left as-is. Keysight N4377A Lightwave Detector User’s Guide...
- Page 29 N4377A Remote Access The remote N4377A appears after a short delay. For more details, refer to http://www.keysight.com/find/iosuite. Keysight N4377A Lightwave Detector User’s Guide...
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Page 30: Using S2P Compensation Data
N4377A Remote Access Using S2P Compensation Data The S2P compensation files can be loaded from the N4377A's read-only USB drive to a computer, e.g. a network analyzer. For automation purposes, the same compensation data can be retrieved using the [:MMEMory]:CORRection? query. For more details see [:MMEMory]:CORRection? on page 22. - Page 31 N4377A Remote Access Navigate to the 2-Port deembed window by selecting Fixtures followed by 2-Port Deembed. In the 2 Port De-embedding window, select the port to which the N4377A is connected. Keysight N4377A Lightwave Detector User’s Guide...
- Page 32 N4377A Remote Access Click the User S2P File... option. Navigate to the S2P File, stored on the N4377A in the folder Compensation Data: Keysight N4377A Lightwave Detector User’s Guide...
- Page 33 N4377A Remote Access After the appropriate file has been selected, change the mode from None to User Defined. Close the window and verify that the displayed S-Parameters are compensated for the response of the N4377A. Keysight N4377A Lightwave Detector User’s Guide...
- Page 35 Keysight N4377A Lightwave Detector User’s Guide Characteristics and Specifications For the characteristics and specifications of the N4377A, refer to the datasheet at http://literature.cdn.keysight.com/litweb/pdf/5992-4214EN.pdf. Declarations of Conformity for this product and for the Keysight products may be downloaded from the Web. Go to http://www.keysight.com/go/conformity.
- Page 37 Keysight N4377A Lightwave Detector User’s Guide Maintenance and Operating Precautions Cleaning the Fiber-Optic Connectors / 38 Preventing RF Port Connector Damage / 41 Preventing Electrostatic Discharge Damage / 43...
- Page 38 Loose particles or oils are smeared and ground into the end of the fiber causing light scattering and poor reflection. Not only is the precision polish lost, but this action can also grind off the glass face and destroy the connector. Keysight N4377A Lightwave Detector User’s Guide...
- Page 39 Improper connector care, cleaning, or use of mismatched cable CAUTION connectors can invalidate the published specifications and damage connectors. Clean all cables before applying to any connector. Repair of damaged connectors due to improper use is not covered under warranty. Keysight N4377A Lightwave Detector User’s Guide...
- Page 40 Removing the receptacle to expose the fiber end. To avoid damaging the N4377A front-panel fiber-optic connector, use NOTE proper connection techniques. Keysight N4377A Lightwave Detector User’s Guide...
- Page 41 Do Not • Clean and zero the gage before use • Use an out-of-specification connector • Use the correct gage type • Use correct end of calibration block • Gage all connectors before first use Keysight N4377A Lightwave Detector User’s Guide...
- Page 42 USB cable removed and in a well-ventilated area. Allow all residual alcohol moisture to evaporate, and the fumes to dissipate prior to reapplying power to the instrument. For more information on the proper use and maintenance of connectors, http://na.support.keysight.com/pna/connectorcare/Connector_Care.htm Keysight N4377A Lightwave Detector User’s Guide...
- Page 43 Connect a short (from your calibration kit) to one end of the cable and DUT to short the center conductor to the outer conductor. While wearing a grounded wrist strap, grasp the outer shell of the cable and DUT connector. Connect the other Keysight N4377A Lightwave Detector User’s Guide...
- Page 44 The following table lists Keysight part numbers for ESD protection devices. Description Keysight Part Number Grounding wrist strap 9300-1367 5-ft grounding cord for wrist strap 9300-0980 2 x 4 ft conductive table mat and 15-ft grounding wire 9300-0797 Keysight N4377A Lightwave Detector User’s Guide...
- Page 45 This information is subject to change without notice. © Keysight Technologies 2019 Edition 1.0, December 2019 www.keysight.com...
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