Chassis Configuration Settings
GARD 8000 SYS RFL Electronics
April 1, 2012 7-48 973.334.3100
Channel 1 Settings Definitions
Ch1 TX Center Frequency (300-4000 inc 1)
This is the configured center frequency of the channel 1 transmitter. The actual tone transmitted will be
the center frequency plus the shift frequency or the center frequency minus the shift frequency. Legal
settings are from 300Hz to 4kHz in 1Hz increments. If channel 1 is set to be a modem, the center
frequency should be set to 700Hz or higher.
Ch1 TX Shift
This is the channel transmitter shift frequency. This is a pull down menu with the following shift
frequency choices: 30, 42, 60, 75, 85, 90, 120, 150, and 240Hz.
Ch1 Tx Level (-30-+10 inc 1)
This is the channel 1 transmitter level in dBm. The range is from +10dBm to -30dBm in 1 dBm
increments. The user is cautioned that the summation of all Tx outputs combined can exceed the drive
capability of the ATT module. For this reason, if channel 1 is set to +10dBm, all of the other channels
must be set to OFF, two active channels cannot be set to more than +4dBm, and four active channels
cannot be set to more than -2dBm.
Ch1 Boost (0-12 inc 1)
This is a short term duration “increase” in the channel 1 Tx output level when the channel is keyed.
The legal range is from 0dB to +12dB in 1dB increments. For example, if the channel 1 Tx level is set
to -15dBm and the boost is set to 5dB, then the Tx output will be -10dBm for a short duration. The
duration is set at Settings, System Logic Configuration, Option Settings, Function A Boost (typically
assigned to channel 1), or can also be set at the Timer Settings web page. The duration “increase”
default is 15ms.
Ch1 RX Center Frequency (300-4000 inc 1)
This is the configured center frequency of the channel 1 receiver. The actual tone received will be the
center frequency plus the shift frequency or the center frequency minus the shift frequency. Legal
settings are from 300Hz to 4kHz in 1Hz increments. If channel 1 is set to be a modem, the center
frequency should be set to 700Hz or higher.
Ch1 RX Shift
This is the channel receiver shift frequency. This is a pull down menu with the following shift
frequency choices: 30, 42, 60, 75, 85, 90, 120, 150, and 240Hz.
Ch1 RX Level (-40-0 inc 1)
This is the channel 1 receiver level in dBm. The range is from -40dBm to 0dBm in 1 dBm increments.
The user is cautioned that the summation of all Rx inputs combined can exceed the receive capability
of the ATP module. This setting should equal the actual receiver level measurement for the channel.
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