Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
RFL 9785 RFL Electronics Inc.
June 18, 2009
2-4 (973) 334-3100
2.4 PHYSICAL DESCRIPTION
Each RFL 9785 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.
2.5 SYSTEM SPECIFICATIONS
As of the date this manual was published, the following specifications apply to all RFL 9785 terminals,
except where indicated. Because all RFL products undergo constant refinement and improvement,
these specifications are subject to change without notice.
2.5.1 TRANSMITTER SECTION
Frequency Range: 30 kHZ to 535 kHz, switch-selectable in 10-Hzsteps.
Modulation: ON/OFF amplitude modulated and optional voice modulated.
Frequency Stability: ±10 Hz, crystal-controlled.
Output Power: 10 watts, measured at the amplifier output. Additional power is available when the
RFL 9785 is used with one or more external amplifiers.
Harmonic Content: Less than -55dB, typically -60dB.
2.5.2 RECEIVER SECTION
Sensitivity: 5 mVrms minimum signal.
Dynamic Range: 30 dB.
Input Impedance: 50Ω , 75Ω, or greater than 30kΩ for bridging.
Response Time: 1.5 to 5 ms, with transmitter and receiver connected back-to-back and using
solid-state outputs, depending on bandwidth choice and logic.
Block Outputs:
Two solid-state block outputs
Two electro-mechanical blocking relay outputs
Alarm Outputs:
Two electro-mechanical alarm relay outputs
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