STSX-1 Calibration
Document No. RF 002331D
4-2
ASA Settings
To set up the ASA 312 for STSX-1 calibration:
1. From the ASA 312 Touch Screen, select the SONET Protocol Processor.
2. Press the
Trnsmt
Function Group button.
3. Press the
Settings
button.
4. Press the
Transmit Interface
command and select
STSX-1
.
Oscilloscope Settings
Configure the oscilloscope to the following settings. Refer to the oscilloscope’s user
documentation for specific operation:
■
High impedance input
■
250 ns per horizontal division
■
AC Coupled
■
Use highest bandwidth available on the oscilloscope
■
0V vertical offset
■
Measuring frequency—maximum peak voltage and minimum peak voltage
■
Acquisition set to average 8 samples
Calibrating STSX-1
The following procedures describe how to perform STSX-1 calibration using an
ASA 312 and oscilloscope:
1. Using the oscilloscope, measure and record the average positive and negative
peak values. The acceptable peak value is 0.750 Vp ± 0.1 Vp.
2. From the ASA 312 Touch Screen:
– Press the
Settings
Function Group button.
– Press
CAL
.
3. Press the
STSX-1 Pos Peak
command and use the Touch Screen keypad to enter
the measured STSX-1 positive peak value.
Press
Enter
to accept the new value.
4. Press the
STSX-1 Neg Peak
command and use the Touch Screen keypad to enter
the measured STSX-1 negative peak value.
Press
Enter
to accept the new value.
This concludes STSX-1 calibration. Proceed to the next calibration section or save
the STSX-1 calibration values. Refer to Chapter 6, Saving Calibration Values and
Passwords, for these procedures.
