STANFORD RESEARCH SR445 350 MHz 4 CHANNEL PREAMPLIFIER ****LOOK**** (REF.: 617G)

Description

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STANFORD RESEARCH SR445
350 MHz 4 CHANNEL PREAMPLIFIER
UNIT IDENTIFIED AS BEING DEFECTIVE. NO FURTHER TESTING WAS DONE. IT IS THEREFORE SOLD AS-IS AND PRICED ACCORDINGLY.
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STANFORD RESEARCH SR445A FEATURES
;
The
Stanford Research SR445
350 MHz Preamplifier contains four wide-bandwidth, DC-coupled amplifiers, each with a gain of 5. The four channels may be used independently or cascaded to provide a total gain of up to 625. The fast rise time, low noise, and excellent DC accuracy of the SR445 make it an ideal instrument for amplifying the outputs of fast photomultiplier tubes and photodiodes. Reach out to Select-test.com for further assistance. The SR445 can be used to improve the sensitivity of oscilloscopes, photon counters, boxcar averagers, spectrum analyzers, and other high-frequency test equipment.
Each channel has an input and output impedance of 50
Ω
. The input impedance of channel 1 can be increased to approximately 500
Ω
by a front-panel switch. This can improve the sensitivity of signals from current and charge output devices, such as photomultiplier tubes. Each channel has a separate offset adjustment allowing you to quickly null DC errors.
Features:
Amplifier channels
4
Inputs and 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 ms
Output clamp
±1.6 V
Output overload detect
±1.3 V
Crosstalk
-60 dB
Operating temperature
0 °C to 40 °C, non-condensing
Dimensions
8.3" × 1.5" × 8.0" (WHL)
Power
10 W, 100/120/220/240 VAC, 50/60 Hz
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BOX SIZE
18 INCHES X 18 INCHES X 13 INCHES
Weight = 16 lbs
Unit to be shipped from Postal Code (equivalent of Zip Code): H1E 5Y8