The JSQ SQUID Electronics is used to generate the pumping radio frequency for SQUID operation, with the required adjustments of rf frequency and amplitude for working point adjustment. Furthermore, the electronics serves as preamplifier and demodulator of the rf response of the SQUID. The SQUID is kept at a well-defined flux state (working point). This operating principle ensures a linear transfer function. It allows a dynamic range from a few 10-5 to about 103 magnetic flux quanta with excellent linearity.
|RF-power output||-72 dBm to –118 dBm (adjustable)
|Frequency||450 MHz to 900 MHz (adjustable)|
|Total amplification||~ 100 dB|
|signal output amplitude||±10 V|
|test output amplitude||< 1 Vpp|
|modulation output amplitude||~ 1 Vpp (varying with feedback resistor setting)|