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'''~+TQDC-16+~''' is a 16-channel discriminator, multi-hit time-stamping TDC and waveform digitizer. It is used to measure pulse arrival time, charge and pulse shape.
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== Features ==
 * 16 channels, single-ended 50 Ohm input
 * TDC: time-stamping, 25ps bin size
 * Amplitude (charge) measurement: 10/14 bit, 80 MS/s ADC
 * On-board trigger matching logic

== Interface ==
 * VME, VME64x
 * Clock, Trigger and Reset inputs (LVDS)
 * Local Trigger output (LVDS)

== Technical Description ==

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{{attachment:tqdc-16-fp-thm.png|TQDC-16 VME TDC Module Front Panel}}
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== LEDs ==
 . 1 (red) - Error or unconfigured. Lights when module is reset.
 . 2 (yellow) - Local trigger. Lights when trigger output is activated.
 . 3 (green) - Data Busy. Lights when module has data to be read out.
== Inputs ==
 * INPUTs - 16 differential signal inputs
 * [[TTC]] bus input
== Outputs ==
 * TRIG - Local trigger output, 4 lines, 62.5 - 80.0 ns trigger logic delay

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== Specifications ==
 * Discriminator minimal threshold 4 mV (highpass filter)
 * Input signal range: ±270 mV

== Power ==
 * V2.0, V2.1
   * +3.3V 1.8A
   * +5V 2.8A
 * V3.0, V4.0, V4.1
   * +3.3V 4.2A

== VME Registers ==
 * Detailed description of [[VmeRegistersTqdc16|TQDC-16 VME Registers]]

== VME Data Format ==
 * [[DataFormatTQDC|TQDC-16 Raw Data Format]]

== Block Diagram ==
{{attachment:tqdc-diagram.png}}

== Trigger Logic Diagram ==
{{attachment:tdc_trigger_small.png}}

== Board Diagnostics ==

Available on PCB V4.1

Internal LED function while board is powered from VME

||DONE LED (orange)||Condition||
||ON||Normal operation||
||off||Booting||

== Revision History ==
 * 4.1 - SYSFAIL* driver, bugfix
 * 4.0 - more precision on ADC: 14-bit
 * 3.0 - bugfix
 * 2.1 - features added:
    * discriminator offset measurement points added
    * thermometer added
    * replaced VME P2 96-pin with 160-pin for VME64x compatibility
    * configuration EEPROM added
 * 2.0 - bugfix:
    * fixed GA wiring
    * added decoupling capacitor on discriminator threshold input (pin 4)
 * 1.0 - base revision


[[Lut Table usage|Trigger logic using LUT tables]]


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[[CategoryTdc|TDC]] [[CategoryAdc|ADC]] [[CategoryVme|VME]]