Description
The SR844 is the widest bandwidth lock-in amplifier available. It provides uncompromised performance with a frequency range of 25 kHz to 200 MHz and up to 80 dB of drift-free dynamic reserve. The SR844 includes the many features, ease of operation, and programmability that you've come to expect from SRS DSP lock-in amplifiers. The Stanford Research Systems SR844 lock-in amplifier has both 50ohm and 1 Mohm inputs. The 1 Mohm input is used with high source impedances at low frequencies, or with a standard 10× scope probe. The 50ohm input provides the best RF signal matching. The Stanford Research Systems SR844 is easy to use. All instrument functions are set from the front-panel keypad, and the knob is used to quickly adjust parameters. Up to nine different instrument configurations can be stored in non-volatile memory for fast, reliable instrument setup.
Features:
25 kHz to 200 MHz frequency range
80 dB dynamic reserve
Time constants from 100 µs to 30 ks (6, 12, 18 or 24 dB/oct rolloff)
“No Time Constant” mode (10 µs to 20 µs update rate)
Auto-gain, -phase, -reserve and -offset
Two 16-bit DACs and ADCs
Internal or external reference
GPIB and RS-232 interfaces
Specifications & Attributes (Amplifiers)
Frequency |
25 KHz - 200 MHz
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