The PT‑AMG2 Portable Audio Signal Generator and Monitor provides a rugged compact solution for the numerous checks required when installing and setting up a system. The PT‑AMG2 provides a stable tone generator at a reference level of +4 dBu (switch selectable to +6 dBu) on its balanced output and -10 dBu on its unbalanced output. The output may also be set to mic level (attenuated 50 dB). Monitoring is done with an LED VU meter, with 0 VU corresponding to the levels produced by the generator. There is also an LED labeled IN PHASE providing assurance that polarity is not inverted on the signal path. There is also an onboard amplifier and speaker to monitor the quality of an audio source.