The JSQ SQUID Electronics Controller is the user front end for a JSQ SQUID Electronics Preamplifier. Together it 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.
Parameters of the JSQ 1 Ch rf SQUID Electronics:
|RF power output||adjustable from –72 dBm to –118 dBm|
|Frequency||adjustable from 450 MHz to 900 MHz|
|Total amplification||~ 100 dB|
|signal output amplitude||±10 V|
|modulation output amplitude||adjustable from 0 – 2 Vpp|
Front and back side of the JSQ 1 Ch rf SQUID Electronics Controller. The left photo
shows the electrical connectors to power supply, computer and oscilloscope, the
right one the connectors to the JSQ Electronics Preamplifier.