- A Keithley 2450 source meter will be used to measure QE and dark current vs bias. It is on the QIL network as 10.0.1.130. A command interface is available via telnet for running measurements and grabbing data.
- A FEMTO transimpedance amp and SR785 will be used to take dark noise spectra, with bias supplied by a DAC channel filtered by an SR560. The 785 is on the QIL network as 10.0.1.66, and the usual GPIB scripts should be sufficient.
- A relay has been installed to control the switching between the Keithley and SR785 readouts.
- BNC cables and breakouts connect the electronics on the table with the cymac (see table below for the channel assignments at the moment).
| Cymac channel |
Assignment |
| ADC 29 |
Reference PD out |
| ADC 30 |
TED200C temperature out |
| ADC 31 |
ITC510 TEC temperature out |
| DAC 12 |
LDC201C laser current ctrl |
| DAC 13 |
SR560 (PD bias control for dark noise measurement) |
| DAC 14 |
ITC510 TEC temperature tune |
| DAC 15 |
Relay control (0 ct = Keithley, 30k ct = SR785) |
Note: in the preceding table, channel numbers use the digital convention (numbered starting from zero), which is not the convention used by the AA/AI chassis front panel (numbered starting from one). |