Until we put in a more permanent solution next week, over the holiday weekend here are the instructions to allow the operator to disallow hardware injections from running, say in the event of a GRB.

From the SITEMAP MEDM, on the X-Arm line, select the CAL pull down and press the PINJX button

You will see the CAL_INJ_CONTROL MEDM for the x-arm.

The part we are interested in is the Transient signals portion in the centre of the screen. Open the  filter modlue screen by pressing the TRANSIENT related display button.

The filtermodule can be in one of two states depending upon whether a transient hardware injection is currently runng (not a high probability occurance).

If an injection is not running (the most probable scenario), the GAIN will be 0.000. In this case, turn OFF the output ON/OFF button to the right of the LIMiT switch.

If an injection is running the GAIN will be 1.000, set the GAIN to 0.000 (it will ramp down over 2 seconds) and then turn OFF the ON/OFF button.

At this point wait for the ring-down period of time (nominally one hour).

To permit hardware injections, turn ON the ON/OFF button (in the unlikely event an injection is running, either wait for it to finish or set the GAIN to 0.000 again)