Signal Strength Display - Dawn CONTROL-1500A Manual

CONTROL-1500A Single Axis Antenna Controller
set to 254 and slow speed is selected, the slow banner and a voltage code will be displayed,
but the drive will move at fast speed and the voltage code will not change.
Use the following procedure to determine the slow speed code,. For 36 volt DC linear
actuators, slow speed codes of 140 to 180 are common.
1. In MANUAL mode jog the antenna at FAST speed for exactly 10 seconds and record the
number of counts which occur. Make sure that the antenna does not reach a limit during
the move.
2. Use the following table to determine an initial setting for the speed code.
Position Counts
60
70
80
95
120
145
170
200
250
3. Go to CONFIG mode and use the SCROLL keys to bring up the Slow Speed item. Key in
the new speed code followed by the ENTER key.
4. Go to MANUAL mode, toggle the speed to SLOW, and jog the antenna. Continue jogging
the antenna until the voltage code displayed to the right of the SLOW banner settles to a
steady state range of values. This may take 5 to 10 seconds. If a limit is reached, jog the
antenna in the opposite direction. After the voltage code settles to a steady state range of
values, check the rate of movement to make sure that it is slow enough to be useful but not
so slow that the motor stalls or moves in a jerky fashion. If the movement is not
satisfactory increase or decrease the speed code by 3 to 5 counts. Increasing the speed
code results in a faster rate of slow speed movement. Repeat steps 3 and 4 until
satisfactory slow speed movement is attained.

3.6 Signal Strength Display

The CONTROL-1500 displays signal strength information in Manual (MAN), Remote (REM), Setup
(SET), and Limit (LIM) modes on the far righthand side of the top row of the LCD. The signal
strength display is derived from an analog input voltage (0 to 10 volts maximum) that varies
with received signal strength. This section describes calibration and display of the analog
input voltage. Note that the display of signal strength information does not affect the operation
of the controller.
An analog voltage that varies with received signal strength is generated somewhere within
every satellite receiver or modem. This voltage is sometimes referred to as an AGC signal
(Automatic Gain Control). On many receivers this signal is available at a terminal on the back
of the receiver. On satellite receivers this signal may also be referred to as a 'Signal Strength'
or 'Tuning Meter' output. An AGC output typically varies in proportion to the received power of
the transponder which the receiver is currently tuned to.
DAWNco • 3340 S. Lapeer Rd • Orion, MI 48359-1320 • Ph (248) 391-9200 • Fax (248) 391-9207 • sales@DAWNco.com
Speed Code
80
90
100
110
120
130
140
150
160
Chapter 3 Installation/Setup
Position Counts Speed Code
300 165
350 170
415 175
525 180
715 185
1100 190
1325 195
1450 200
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