The RDA-6A is a six (6) channel Reference Distribution Amplifier designed for distributing an external
reference frequency standard, such as a Stanford Research PRS-10 Rubidium reference or a Trimble
Thunderbolt GPS disciplined oscillator, to laboratory equipment such as frequency counters, spectrum
analyzers or signal generators. This allows all of your laboratory equipment to be stabilized to
one reference frequency. The RDA-8A is identical to the RDA-6A with the addition of two (2) 5 MHz reference
output ports on the rear of the unit.
The RDA-6A provides high isolation between output channels and high isolation between any
output channel and the input channel This prevents one piece of test equipment from disturbing another
which is a typical problem using resistive power splitters to distribute a reference frequency.
The output level is typically +10dBm with a +10dBm input channel level. This meets the required driving
level of most test equipment. Each channels output level can be adjusted over a 58dB range from +13 to -45dBm,
allowing independent level settings for each channel if needed. The 5 MHz reference outputs on the RDA-8A are
not adjustable and are set for an output level of approximatly +10dBm at the factory.
Each Reference Amplifier is powered from a wall mounted 12VDC power supply and the unit is always powered ON as there is
no power switch to get turned off accidently. A front panel green LED indicates the power on condition of the unit.
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