Keysight 849x and 1158x Operating and Service Manual
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Service Instructions
Repair
The 8490D/G, 8491A/B the 8493A/B/C attenuators are not recommended for repair since the
cards must be mounted in cartridges to test and testing costs more than a replacement attenuator.
Maintenance
The connectors, particularly the connector faces, must be kept clean. This is especially true of the
8493A/B/C.
For instruction on connecting and care of your connectors, refer to the Microwave Connector Care
Quick Reference Card (08510-90360).