-22-
Figure 5 USB Check program
3.2 Measurement and adjustment
Carry out measurement and adjustment according to below sequence.
1. Remove the bottom cover of the G9.2tt.
2. Turn the power on the normal mode.
3. Press the”BYPASS/TUNER” Key or “HOLD/BYPASS/TUNER” for a
while and the signal line of G9.2tt become state of “BYPASS”.
4. Turn the “TUBE” knob to 10(MAX) position and the “BOOST” knob to
0(MIN) position.
5. Turn the “ACC_TUBE” knob to 0(MIN) position and the
“SOLIDSTATE” knob to 10(MAX) position.
5. Make all EX PEDALs to be MAX.
6. Input the signal (sine wave) of -46 dBm 440Hz to “INPUT”
7. Monitor the indication level on the application program of “G2.1u USB
Check”.
Refer to Fig5.
8. .Adjust the trimmer (left ch=VR203, right ch=VR204) for fitting into
range of provided level.
9. Change a tube if that level doesn’t fit into range of provided level, and
adjusts again.
Range of provided level is, in both left channel and right channel,
[-37.5 dBm ± 2.0dB] (However, difference both channels within 1.0dB)
This level is the same with one of G7.1ut.
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