Anritsu MX183000A, Руководство по эксплуатации, Страница: 88 / 226

Chapter 4 Operation
4-34
Table 4.6.2-1 JTOL Settings Items (Cont’d)
Item Description
Direction Search Sets jitter modulation amplitude change direction and method.
Refer to the description in Section 4.7.1 “Measurement Sequence”
● Binary
● Downwards Linear
● Downwards Log
● Upwards Linear
● Upwards Log
● Linear
Note:
Only the following three selections are available when Estimate
is selected.
1 Binary
Measures BER with 1E–6 as the target for the measurement
range.
Calculates the estimate curve from the data obtained in the
measurement process.
2 Downwards Linear
Measures BER with 1E–7 as the target. Calculates the
estimate curve in the same way as for (1).
3 Upwards Linear
Measures BER with 1E–5 as the target. Calculates the
estimate curve in the same way as for (1).
Step Enabled when Downwards Linear or Upwards Linear is selected.
Sets change ratio of jitter amplitude for each modulation frequency
band below.
Jitter Freq.
≤ 100 kHz
100 kHz<Jitter Freq. ≤ 1 MHz
1 MHz <Jitter Freq. ≤ 10 MHz
10 MHz<Jitter Freq.
Ratio Enabled when Downwards Log or Upwards Log is selected.
Sets change ratio of jitter amplitude for each modulation frequency
band below.
Jitter Freq.
≤ 100 kHz
100 kHz<Jitter Freq. ≤ 1 MHz
1 MHz <Jitter Freq. ≤ 10 MHz
10 MHz<Jitter Freq.
Timer [s]
Waiting Sets the waiting time after changing the jitter modulation frequency
until the next process starts.
Refer to Section 4.7.2 “Measurement time”.
Settling Sets the waiting time after changing the jitter modulation
amplitude until the BER measurement starts.
Gating Sets the measurement time until judgment ends.
Fixed at 1 second when Estimate is selected for Direction Unit.