Details of complaint: on 4/24/2019 customer reported random signal loss on the 5th floor.The entire floor was renovated and all the patients from the 6th floor were moved here.Previously the issue was reported on the 6th floor but the issue followed the move.Customer was using nk lead wires to for transmitters to ensure appropriate impedance.Customer removes batteries from dirty transmitters before putting them in a bin to prevent intermodulation.The issue was occurring randomly and seem to be getting worse.Customer also reported high patient census recently and the signal loss issue seem to be occurring in double occupancy rooms.Single-occupancy rooms were not affected.Customer visually inspected 6th floor org closet - no error lamps.Customer checked coax closet - no obvious issues noted.Two affected areas on the 5th floor was identified: antennas 5-b5 - 5-b7 and 5-a5 - 5a7, splitters 5-as2 (4/1) and 5-bs2 (4/1).The following org receivers (identified by hospital's id) were connected to the transmitters having signal loss: org00267, org00291, org00293, org00294.On 8/12/2019 customer stated the issue was resolved with the use of a hand-held spectrum analyzer.Clarification was not provided.Service requested: troubleshooting.Service performed: troubleshooting.Investigation result: org-9100a operator's manual, troubleshooting section, listed the criteria of causes for signal loss: transmitter battery is reversed.Transmitter battery is weak.Channel number of the monitor does not match that of the transmitter.Receiving antenna is disconnected.Transmitter power is turned off.Antenna system is faulty.Antenna is not placed at an appropriate position.Transmitter (type a or c) does not match receiver (type a or c).Distance between transmitter and antenna is too far or there is interference on the signal.Antenna setting on the monitor is not correct by customer's statement, the issue was resolved by the use of a spectrum analyzer.This device is used to analyze the quality of the signal as well as interference sources, thus the cause of the floor-wide, random signal loss may be due to a) antenna placement / distance between transmitter and antenna and/or b) electromagnetic interference.However, with insufficient information provided, the root cause of the floor-wide, random signal loss remains unknown.Service history for this user facility shows the floor-wide signal loss issue has not re-occurred.Investigation conclusion by customer's statement, the issue was resolved by the use of a spectrum analyzer.This device is used to analyze the quality of the signal as well as interference sources, thus the cause of the floor-wide, random signal loss may be due to a) antenna placement / distance between transmitter and antenna and/or b) electromagnetic interference.However, with insufficient information provided, the root cause of the floor-wide, random signal loss remains unknown.Corrected information: f9.Approximate age of device: incorrectly calcuated.Additional information: b4.Date of this report.F6.Date user facility/importer became aware of the event.F7.Type of report.F11.Date report sent to fda.F13.Date report sent to manufacturer.G4.Date received by manufacturer.G7.Type of report.H2.If follow-up, what type? additional information.Correction.H6.Event problem and evaluation codes.H10.Additional manufacturer narrative.The following fields are not applicable (n/a) to this report: d4 lot # & expiration date.
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