No no, hud set frame should work...
Signal Gauge: Can display 1 line of text plus a 10 segment near-log bar gauge. Located above the crosshair elements. Cannot be used at the same time as misc status.
BPSignalGaugeTop: Graphic + Text, top title
BPSignalGaugeBar: Graphic only, has 11 frames. Use set-hud-frame to display the correct frame. Frame 0 has 0 segments filled, Frame 1 has 1 segment filled, etc etc
Can you post your event where you're trying to use it?
If you're looking for another signal detector, I do have a lua script I was working on after release that works a bit nicer and is a lot easier to use.