Research Concepts RC4000 - Manual (Page 91)

RC4000 Antenna Controller Chapter 3 Software
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3.3.1.2.6 SS1 Signal Strength Factors
This screen defines how signal strength inputs are used. See sections x and y for references to the use
of signal strength inputs.
LOCK:0 TIME:0.1 CONFIG-SS1
TH:100 POL:0
LOCK TYPE <0>NONE <1>HI <2>LO
LOCK: LOCK TYPE <0>NONE <1>HI <2>LO
When the autopeak source is the SS1 input, this item defines whether a discrete signal lock input is
required to indicate a satellite has been found. The signal lock input may help in distinguishing the
correct satellite while doing a LOCATE.
If a signal lock input is used, it may be defined as either having a HI (>3.5 VDC) or LO (< 0.8 VDC) level
that indicates lock.
TIME: DELAY TIME <0.1 – 9.9> SECONDS
This item defines how long the RC4000 will wait after each step before sampling signal strength.
Increasing this value may be required to allow equipment such as a modem to generate an AGC output.
POL: <0>NEGATIVE <1>POSITIVE INPUT SENSE
The polarity flag tell the controller what the sense is on the signal strength input voltage used for tracking
and autopeak operations. A positive sense is defined as one that increases in magnitude as the RF
signal strength increases. If the signal strength voltage decreases as the RF signal increases, its polarity
is considered negative.
TH: MINIMUM SIGNAL THRESHOLD <0-999>
The threshold item defines what the minimum signal strength indication for the channel is required for the
tracking system to “recognize” that a satellite is present. NOTE: these items are only applicable to
TRACK mode.
If different bands are received that exhibit different “off satellite” signal strengths, the highest “off satellite”
value should be used to avoid the possibility of recognizing noise as a satellite.
3.3.1.2.7 SS2 Signal Strength Factors
-- same as SS1