RFL 9780 RFL Electronics Inc.
April 8, 2003 2-6 (973) 334-3100
2.5 PHYSICAL DESCRIPTION
Each RFL 9780 terminal is a group of circuit board modules housed in a chassis three rack-units high
(5.25 inches, or 133 mm). Interconnections between modules are made by a motherboard in the chassis.
External equipment is connected to the chassis through I/O modules, which plug into the rear panel.
2.6 SYSTEM SPECIFICATIONS
As of the date this manual was published, the following specifications apply to all RFL 9780 terminals,
except where indicated. Because all RFL products undergo constant refinement and improvement, these
specifications are subject to change without notice.
2.6.1 TRANSMITTER SECTION
Frequency Range: 30 to 535 kHz, switch-selectable in 10-Hz steps.
Modulation: Can be either two-frequency or three-frequency FSK. Each shift can be independently
programmed between 10 and 990Hz from the center frequency, in 10Hz steps.
Frequency Stability: ±10 Hz, crystal-controlled.
Output Power: Up to 10 watts, measured at the amplifier output. Additional power is available
when the RFL 9780 is used with one or more external amplifiers.
Trip boost can be enabled by using switches on the logic module.
Harmonic Content: Less than -55dB, typically -60dB.
Trip Key Inputs (2):
48 Volt Inputs
Will not operate at or below: 28 Volts
Will operate at or above: 35 Volts
Minimum pulse duration: 100µSec
125 Volt Inputs
Will not operate at or below: 70 Volts
Will operate at or above: 90 Volts
Minimum pulse duration: 100µSec
250 Volt Inputs
Will not operate at or below: 140 Volts
Will operate at or above: 175 Volts
Minimum pulse duration: 100µSec
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