N6954A/N6974A 326
N6950A/N6970A with Option 301 327
N6951A/N6971A with Option 301 328
N6952A/N6972A with Option 301 329
N6953A/N6973A with Option 301 330
N6954A/N6974A with Option 301 331
N7950A/N7970A 332
N7951A/N7971A 333
N7952A/N7972A 334
N7953A/N7973A 335
N7954A/N7974A 336
N6976A 337
N6977A 338
N7976A and N6976A with Option 301 339
N7977A and N6977A with Option 301 340
8 Service and Maintenance 341
Introduction 342
Types of Service Available 342
Before Returning the Unit 342
Repackaging for Shipment 342
Cleaning 343
Self-Test Procedure 344
Power-On Self-Test 344
User-Initiated Self-Test 344
Firmware Update 345
Firmware Versions 345
Software Required 345
Update Procedure 346
Restricting Access 346
Option Installation 347
Obtaining the License 347
Instrument Sanitize 348
Sanitizing the Black Box Recorder 348
Calibration Switches 349
Accessing the Calibration Switch 349
Switch Functions 349
Battery Replacement 350
Installing the Instrument 350
Redundant Ground for 400 Hz Operation 352
Hardware and Tools Required (customer -supplied) 352
Installation Procedure 352
Disassembly 353
Electrostatic Discharge (ESD) Precautions 353
Tools Required 353
General Disassembly Procedure 353
Index 355
Keysight N6900/N7900 Series Operating and Service Guide 10