Draft 1 — DLI Proprietary Information 4/15/02
2-1
2
DS1 and Frequency Adjustment
Calibration
Overview
This chapter describes the various procedures used to calibrate and save
Frequency Adjustment and DS1 parameters of the ASA 312. Each section of this
chapter lists the equipment required and the necessary equipment settings to
perform each calibration procedure.
Frequency Adjustment
This procedure calibrates the ASA 312’s internal clock using the
Frequency Adj (0-
255)
Calibration command. This is a single adjustment that applies to all four
protocol processor test sets.
The ASA 312 uses a digital potentiometer that allows adjustment of the frequency
in 255 steps, where 0 is the lowest frequency, 128 is the center frequency, and 255
is the highest frequency.
Review the procedures in this section before attempting to adjust the ASA 312’s
frequency.
Required Equipment
The following equipment is required to perform this procedure:
■
ASA 312
■
Frequency counter
■
A BNC-to-Bantam, 100 ohm test cord
This is a 3-ft 100 ohm coaxial BNC-to-Bantam cable that is available from
Digital Lightwave, Inc. (Part Number 002727). Some of these cables have a
red boot near the BNC connector.
Hardware Setup
The following section describes how to attach cables between the ASA 312 and
the frequency counter (refer to Figure 2-1).
To attach cables between the ASA 312 and the frequency counter:
1. Make sure that both the ASA 312 and frequency counter are turned on.
2. Attach the cable’s BNC connector to the BNC connector on the frequency
counter.
3. Attach the cable’s Bantam connector to the ASA 312’s
DS1 TX
Bantam jack.
