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BB60C Is Plugged In but Spike Finds No Device — The LED Flashes Red/Green. How Do I Fix This?
BB60C Is Plugged In but Spike Finds No Device — The LED Flashes Red/Green. How Do I Fix This?
Symptom
The USB cable is connected, yet the device list in Spike stays empty and the software reports it cannot connect. On the instrument itself the READY/BUSY indicator is not steady green — it alternates between red and green, or stays dark. In Windows Device Manager the analyzer may appear as an unknown USB device with a warning icon.
Root Cause
The BB60C is bus-powered and streams digitized data to the PC at roughly 140 MB/s over USB 3.0. "Device not found" almost always means the USB link cannot negotiate full-speed operation — wrong port, hub in the path, bad cable, or a controller power-management setting — rather than a failed instrument.
Troubleshooting Steps
Use a native USB 3.0 port on the back of the PC. Connect directly to the motherboard — no front-panel ports, no hubs, no KVM switches, no docking stations. On laptops, prefer the ports wired to the main controller.
Use the original short cable. High-rate USB 3.0 links are length-sensitive. Replace any improvised or extension cable with Signal Hound's supplied cable, keeping runs under ~1 m.
Check enumeration. Open Device Manager and confirm the BB60C appears without a warning icon. A yellow triangle means the descriptor handshake is failing — move to a different port and controller.
Disable USB power saving. In Power Options set "High performance", and turn off "USB selective suspend setting". In Device Manager also disable "Allow the computer to turn off this device to save power" on each USB Root Hub.
Eliminate port conflicts. Close any program that may hold the instrument (GNU Radio, MATLAB, LabVIEW hosts, custom apps), then restart Spike.
Update from official sources. Install the latest Spike from the Signal Hound support page; older builds may not recognize newer firmware.
Cross-check with a second PC. If the unit enumerates and connects normally on another machine, the problem is the original host's USB controller, not the analyzer.
Acceptance Test
The LED holds steady green within seconds of plugging in, the device appears in Spike's list, and a scan runs continuously for 10 minutes without dropping. If the LED never stabilizes on multiple known-good PCs and cables, suspect hardware and arrange service rather than continuing software fixes.
*(Based on publicly available Signal Hound BB60C user manual and datasheet specifications.)
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