YOKOGAWA AQ7260 OTDR, Руководство пользователя, Страница: 389 / 442

Chapter 8 USING OPTIONS AND EXTERNAL DEVICES
8-38
Device Message
No. Function
Header
Numeric
Part
Description
4-4 Plug check PC m Enables (ON)/disables (OFF) the optical plug
connection check.
m
=
0: OFF
1: ON
4-5 Measurement condition
automation / event
detection
ASU m Sets the measurement condition automation / event
detection function.
m
=
0: Manual
1: Auto range
2: Auto attenuation
3: Auto range
+
Auto search
4: Auto search
5: Auto attenuation
+
Auto search
4-6 Distance range R m Sets the distance range.
m
=
0: 10 km 5: 240 km
1: 20 km 6: 5 km
2: 40 km 7: 2 km
3: 80 km 8: 320 km
4: 160 km 9: 640 km
The distance range that can be set varies with the
wavelength to be used.
4-7 Pulse width PW m Sets the pulse width.
m
=
0: - 6: 1 µs
1: 10 ns 7: 4 µs
2: 20 ns 8: 10 µs
3: 100 ns 9: 20 µs
4: 200 ns 10: 50 ns
5: 500 ns 11: 50 µs
The pulse width that can be set varies with the
optical module and distance range to be used.
4-8 Attenuation AT m Set the attenuation.
m
=
0: 0.00 dB 11: 13.75 dB
1: 1.25 dB 12: 15.00 dB
2: 2.50 dB 13: 16.25 dB
3: 3.75 dB 14: 17.50 dB
4: 5.00 dB 15: 18.75 dB
5: 6.25 dB 16: 20.00 dB
6: 7.50 dB 17: 21.25 dB
7: 8.75 dB 18: 22.50 dB
8: 10.00 dB 19: 23.75 dB
9: 11.25 dB 20: 25.00 dB
10: 12.50 dB 21: 26.25 dB
The attenuation that can be set varies with the
pulse width.
4-9 Average condition AVD m Sets the type of average measurement.
m
=
0: Average time (2^*)
1: Average interval
2: Average time (*k)