DSIM-SS
Installation Guide Rev B
Page 6 of 18
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3. DSIM Mode Definitions
Operation Mode
Definition
MGC
In the Manual Gain Control (MGC) mode the DSIM automatic gain
control is turned off.
The MGC mode is used during the setup of the station so that no
gain adjustments are made when the levels and slopes are setup.
AGC
In Automatic Gain Control (AGC) mode will make gain adjustments
to the station based on the level changes that occur on the pilot
channel.
TGC
In Thermal Gain Control (TGC) mode the DSIM will make gain
adjustments based on the changes in the internal temperature of
the station. In the TGC mode there is a selection of 9, 18 or 27 dB
for the amount of cable that is in front of the station. The dB of
cable setting is used to more accurately predict actual losses that
occur in the cable with the changes in the outside temperature.
Note:
Thermal operational mode should not be used in amplifiers
that are pedestal mounted for underground networks. These units
operate on the assumption that cable temperature will change at
the same rate as amplifier temperature, while amplifiers mounted
in pedestals will vary in temperature far greater than the
underground cable temperature.
