SR240A - 350 MHz Preamplifier

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Boxcar Averager
SR240A — 300 MHz preamplifier

SR240A ... from $1000

Boxcar Averager
SR240A — 300 MHz preamplifier

BUY / QUOTE

SR240A ... from $1000

Four independent channels
DC to 350 MHz bandwidth
1 ns rise and fall time
Voltage gain to 625
6.4 nV/√Hz input noise
50 Ω input and output impedance
3 ns overload recovery
Excellent phase linearity

Four independent channels
DC to 350 MHz bandwidth
1 ns rise and fall time
Voltage gain to 625
6.4 nV/√Hz input noise
50 Ω input and output impedance
3 ns overload recovery
Excellent phase linearity

Four independent channels
DC to 350 MHz bandwidth
1 ns rise and fall time
Voltage gain to 625
6.4 nV/√Hz input noise
50 Ω input and output impedance
3 ns overload recovery
Excellent phase linearity

The model SR240A 350 MHz Preamplifier is a 4-channel, DC-coupled instrument with a gain of 5 per channel. The amplifiers can be used independently or cascaded to provide gains of 5, 25, 125 or 625. The fast rise time, low noise, and DC accuracy of the SR240A make it the ideal instrument for use with photomultiplier tubes and photodiodes.

SR240A 300 MHz Preamplifier

The SR240A preamp is useful for amplifying small signals to levels that can be processed by other boxcar system modules. Typically, a signal of at least a few millivolts is required at the input of the SR250. If your detector does not supply this signal level, the SR240A can be used in front of the SR250 to ensure sufficient signal amplitude.

SR240A Specifications
General
Amplifier channels	4
Inputs & outputs	50 Ω DC coupled
Bandwidth	DC to 350 MHz (-3 dB)
Rise/fall time	1 ns (single channel)
Voltage gain	5 per channel. Up to 4 channels can be cascaded.
Input noise	6.4 nV/√Hz
Operating range	Inputs: ±200 mV, Outputs: ±1.0 V
Propagation delay	2.7 ns per channel
Recovery time	3 ns for a 10× overload
Input protection	±50 V for <1 µs
Output clamp	±1.6 V
Output overload detect	±1.3 V
Crosstalk	-60 dB
Operation temperature	0 °C to 40 °C, non-condensing
Mechanical	Single-width NIM module
Warranty	One year parts and labor on defects in materials and workmanship