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--- vetoshield:daq:vetodaq_fp [2013/02/20 17:17] – created wgilbert
+++ vetoshield:daq:vetodaq_fp [2013/02/22 13:02] (current) – wgilbert
@@ Line 1: / Line 1: @@
-blap
+===VetoDAQ front  panel===
+This is the main DAQ application
+**Toggle Mux** button: Clicking this button when enabled will reinitialize the Symmetricom card and program it to issue a strobe pulse after a short delay.  This pulse toggles the mux data acquisition off or on, and resets its timing registers. The button will be greyed out and disabled when any of the DAQ read loops are running to avoid invalidating the timestamps in open data files.
+**Modify Configuration** button: opens the Modify Configuration popup vi for subsequent changes any time all the DAQ loops are idle. Otherwise, it is grayed out.
+**Strobe Date/Time**: This indicator shows the date/time of the last strobe pulse, which is also written in Unix seconds to the datafile headers.
+**Bias Volts**: This is an indicator showing the value that was entered in the Modify Configuration popup
+==DAQ Loop controls:==
+**Device Name**: For each DAQ loop, the device name assigned to each PCI-6534 card in MAX is shown in an indicator above the DAQ control cluster. Only DAQ loops with installed cards are enabled, otherwise the controls are grayed out.
+**DAQ Control** cluster: each DAQ read loop and be started and stopped with the buttons at left, with the indicator above showing whether it is running or stopped. Next to these buttons is the **Trg Hz** indicator which is a log scale bargraph with digital readout showing the overall trigger rate for the associated mux. The **Trg Limit** control allows a high limit to be set for the trigger rate using either the slider or by typing into the digital display. If the rate stays above the limit for more than the time set in **D(ead)-sec**, file writing will be inhibited until it drops below the rate value corresponding to the Trg Limit minus the **D(ead)-band** for D(ead)-sec. The **File On/Off** button allows file writing to be turned off regardless of rate, so that the loop only acts as a rate indicator. Since the max trigger rate from any mux is 250,000/sec, setting the rate limit control to any value above that (300,000 max) will eliminate the possibility of a write inhibit.
+**Rate Indicator** cluster: Below each DAQ control is a cluster of digital rate indicators, one for each channel. If the trigger rate for a channel should exceed the condition for a write inhibit, the background of the indicator will turn red regardless of whether the File button is turned off or on.  Also, if a channel remains at zero rate for more than D(ead)-sec, the background will turn blue. It will reset to white immediately on a non-zero reading.
+{{VetoDAQ:vetodaq_v54_ssht.png?1024}}

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