YOKOGAWA AQ2170, Руководство пользователя, Страница: 20 / 25

1kHz
5.11 Frequency detecting
If the tested wavelength is carrying a tone of 270Hz, 1kHz, or
2kHz, the respective frequency indicates on the screen
5.12 The overflow of the measured power value
If the optical power level being measured exceeds the measureable range,
the"HI" value indicating an over range.
If the optical power level being measured falls below the measureable range,
the "LO" value indicating an under range.
5.10 Switching backlighting of the LCD on and off
Press the backlighting key.
Backlighting switches on.
Press the backlighting key again.
Backlighting switches off.
-5.0
1 3 1 0
nm
-5.0
1 3 1 0
nm
1 3 1 0
nm
1 3 1 0
nm
L 0
-20.00
1 3 1 0
nm
15
270Hz