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This follows manual 4901.4026.02 version 08. 192.168.137.1 is the documented WLAN AP route. Use the current owner-confirmed address; a LAN connection can have a different assigned address.
Use the current authorized Wi-Fi name and key. The initial SSID is TSMA6B- followed by the unit serial number; the initial key is instrument, only if unchanged. These are Wi-Fi credentials; no separate web-admin pair is established here.
Use the existing AP connection
Confirm the matching scanner and already active access point with its operator. The manual limits WLAN use to indoors.
Read Home
In Home → Overview, inspect FW/SW Version → Firmware and the existing measurement Status. Leave measurement mode and restart controls unchanged.
If access fails
Check the existing AP connection and ask the operator to verify your assigned client address is in the documented 192.168.137 subnet. If a login prompt appears, obtain the installed credentials from the operator; do not substitute Windows remote-desktop credentials or reset the scanner.
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Rohde & Schwarz R&S TSMA6B User Manual, 4901.4026.02 version 08