YOKOGAWA AQ7260 OTDR, User Manual, Page: 131 / 442

Chapter 3 PERFORMING MEASUREMENTS
3-24
Changing the Average Time/Average Interval
The average time can be changed as explained below.
♦
Example: “2^16”
→
“2^13”
1.
Locate the cursor to “AVE TIMES”
(*1)
by using the rotary knob or the arrow key.
*1: “AVE TIME” is displayed if “TIMES 2^ * ” or “TIMES * k” is selected for “AVE
CONDITION”, and “AVE INTERVAL” will be displayed if “INTERVAL” is selected
for “AVE CONDITION”.
2.
Press [ENTER].
A selection window will appear.
•
The larger the average time/average interval, the higher the accuracy of
measurement results. However, measurement time will be prolonged, so an
appropriate average time/average interval must be set with the instrument’s
dynamic range and loss of optical fiber taken into account.
•
The average time/average interval that can be set vary with the selected average
condition.
*: Indicates the default setting.
Smaller
Larger
TIP
AVE CONDITION
TIMES 2^
*
TIMES
*
k
INTERVAL
2^10 1k times 10sec
2^11 2k times 20sec
2^12 4k times *30sec
2^13 8k times 1min
*2^14 *16k times 3min
2^15 32k times 5min
2^16 65k times 10min
2^17 131k times 20min
Selectable
average time /
average interval
2^18
262k times 30min