Sea Tel DAC-03, Инструкция по установке и эксплуатации

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Setup DAC-03 Tracking Antenna Controller
5-2
To decrease the azimuth value subtract the required number of tenths of degrees from the current
value of AZ TRIM. To enter in a positive value, key in the desired number of tenths and press
ENTER. To enter a minus value, key in the desired number of tenths, press the NSEW key and then
press ENTER.
Re-target the satellite several times to verify that targeting is now driving the antenna to a position
that is /- 1.0 degrees of where the satellite actually is.
5.3.3. AUTO THRES
Sets offset of AGC tracking threshold above the average noise floor. Units are in A/D counts,
approximately 20 counts/dB. Default setting is 50-100. A setting of 0000 disables auto threshold.
When AUTO THRESHOLD is enabled, the DAC-03 automatically re-sets the AGC tracking threshold
whenever the antenna Targets (AZ, EL or SAT), Searches or Unwraps. The new AGC threshold is set
to the average signal level input (approximate background noise level) plus the AUTO THRES offset
value. The AUTO THRES parameter should be set to approximately 3 dB, OR 1/3 to ½ of the ON
satellite to OFF satellite signal level difference, ABOVE the average Noise Floor. This will usually be
around 60 counts (3 dB) for a typical antenna configuration.
EXAMPLE: If the Noise Floor off satellite is 1000 counts of AGC and Auto Threshold is set to 100,
Threshold will be set to approximately 1100 while the antenna is targeting, Searching or
Unwrapping. If you wish to change this parameter, key in the desired value and press ENTER.
5.3.4. EL STEP SIZE
Sets elevation sensitivity for DishScan Tracking Mode . Units are in pedestal step resolution. For
proper DishScan operation this parameter must be set to factory default value . If not already
set to the correct value for your antenna, key in the value and press ENTER. Must be entered twice
within 6 seconds (ie 0, ENTER, then 0, ENTER again).
5.3.5. AZ STEP SIZE
Sets azimuth sensitivity for DishScan Tracking Mode . Units are in pedestal step resolution. For
proper DishScan operation this parameter must be set to factory default value . If not already
set to the correct value for your antenna, key in the value and press ENTER. Must be entered twice
within 6 seconds (ie 0, ENTER, then 0, ENTER again).
5.3.6. STEP INTEGRAL
Sets the integration time for
DishScan Tracking Mode
. This parameter must be set to 0000 for
proper DishScan operation. If not already set to zero, key in 0000 and press ENTER.
5.3.7. SEARCH INC
Sets size of search pattern increment. Units are in pedestal step resolution. The suggested setting
is equal to 1/2 the 3dB beamwidth of your antenna at the frequency band you are using. Refer to
your Antenna Pedestal manual for default setting of this parameter. If you wish to change this
parameter, key in the desired value and press ENTER.
5.3.8. SEARCH LIMIT
Sets the search track-line spacing and the
overall peak to peak size of the search pattern.
Units are in pedestal step resolution. Factory
default setting provides for a large search area
to assure you are able to find the desired
satellite.
After you have optimized your Targeting (TRIM
settings above), and have verified that you are
able to accurately Target repeatably, you may
wish to reduce the size of the search LIMIT