DS1 and Frequency Adjustment Calibration
Document No. RF 002331D
2-2
Draft 1 — DLI Proprietary Information 4/15/02
Figure 2-1. ASA 312 (Bantam) to Frequency Generator (BNC) Connection
ASA 312 Settings
To set up the ASA 312 for Frequency Adjustment:
1. Using the ASA 312 Touch Screen, select the DS1 Protocol Processor.
2. Press the
Trnsmt
Function Group button.
3. Press the
Settings
button.
4. Press the
Clock Reference
command and select
Internal
.
5. Press the
Framing
command and select
Unframed
.
6. Press the
Pattern
command and select
All Ones
.
The ASA 312 is ready for Frequency Adjustment calibration. Continue to
the next section for adjustment procedures.
Adjusting the Frequency
The following procedures require user input to both the frequency counter and the
ASA 312.
1. Observe the signal frequency that appears on the frequency counter display.
The desired frequency is 772 KHz ± 1 ppm.
If the frequency is within the range of 772 KHz ± 1 ppm, then there is no need
to adjust the frequency. If the frequency is not within this range, proceed to
Step 2.
2. From the ASA 312 Touch Screen:
– Press the
Settings
Function Group button.
– Press
CAL
3. Press the
Frequency Adj (0-255)
command.
A touch screen keypad appears. The median setting is 128. The value that
appears for your unit may vary.
Frequency Counter
ASA 312
