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567 Time-to-Amplitude Converter/SCA PERFORMANCE Time-to-Amplitude Converter TIME RESOLUTION FWHM ≤0.01% of full scale plus 5 ps for all ranges. TEMPERATURE INSTABILITY ≤±0.01%/°C (±100 ppm/°C) of full scale or 10 ps/°C (whichever is greater), 0 to 50°C.DIFFERENTIAL NONLINEARITY Typically <1% from 10 ns or 2% of full scale (whichever is greater) to 100% of full scale. INTEGRAL NONLINEARITY ≤±0.1% from 10 ns or 2% of full scale (whichever is greater) to 100% of full scale.RESET CYCLE Fixed 1.0 µs for X1 and X10 Multipliers, fixed 5 µs for X100 Multiplier, and fixed 50 µs for X1K and X10K Multipliers. Occurs after Over Range, Strobe cycle, or Ext Strobe Reset cycle. START-to-STOP CONVERSION TIME Minimum ≤5 ns.Single-Channel Analyzer THRESHOLD INSTABILITY ≤±0.01%/°C (±100 ppm/°C) of full scale, 0 to 50°C (referenced to +12 V NIM bin). THRESHOLD NONLINEARITY ≤±0.5% of full scale.CONTROLS (Front Panel) RANGE (ns) Three-position rotary switch selects full scale time interval of 50, 100, or 200 ns between accepted Start and Stop input signals. MULTIPLIER Five-position rotary switch extends time range by a multiplying factor of 1, 10, 100, 1K, or 10K.DELAY 20-turn screwdriver-adjustable potentiometer varies the delay of the TAC and SCA outputs from 0.5 µs to 10.5 µs, relative to an accepted Stop input signal; operable in the Int Strobe mode only. STROBE MODE Two-position locking toggle switch selects either Internal or External source for initiating the strobe cycle to strobe valid information from the TAC and SCA outputs.START GATE MODE Two-position locking toggle switch selects Coincidence or Anticoincidence mode of operation for the Start circuitry. Start circuitry is enabled in the Coinc position or inhibited in the Anti position during the interval of a Start Gate input signal. STOP GATE MODE Two-position locking toggle switch selects Coincidence or Anticoincidence mode of operation for the Stop circuitry. Stop circuitry is enabled in the Coinc position or inhibited in the Anti position during the interval of a Stop Gate input signal.SCA WINDOW (ΔT) 10-turn precision locking potentiometer sets the SCA upper-level discriminator threshold from 0.05 V to 10.05 V above the Lower Level (T) setting. SCA LOWER LEVEL (T) 10-turn precision locking potentiometer sets the SCA lower level discriminator threshold from 0.05 V to 10.05 V.TAC INHIBIT Two-position locking toggle switch. In the Inhibit position, the TAC output is available only if the output amplitude is within the SCA window. In the Out position, the SCA has no effect on the TAC output. CONTROLS (Rear Panel) EXT STROBE RESET Two-position locking toggle switch allows the converter to be reset nominally 10 µs or 100 µs after an accepted Stop input signal if an Ext Strobe signal has not been received. INPUTS All six front-panel inputs listed below are dc-coupled, edge-triggered, and printed wiring board (PWB) jumper selectable to accept either negative or positive NIM-standard signals. Input impedance is 50 Ω in the negative position and >1k in the positive position. The threshold is nominally –400 mV in the negative position and +2 V in the positive position. STROBE Provides an external means to strobe a valid output signal from the TAC in the Ext Strobe mode. The input signal, exceeding threshold within the Ext Strobe Reset interval after the Stop input, initiates the read cycle for the linear gate to the TAC output. Factory-set in the positive input position. Ext Strobe Reset interval has a minimum value of ~0.5 µs and a maximum value of nominally 10 µs or 100 µs, switch-selectable on rear panel.START Time conversion initiated when Start input signal exceeds threshold. Factory-set in negative input position. STOP Time conversion terminated when Stop input signal exceeds threshold. Factory-set in negative input position.RESET/INHIB Terminates conversion cycle and maintains reset condition, inhibiting further TAC conversions, for the duration of the reset cycle or the Reset/Inhib pulse, whichever is longer. A TAC output pulse in process at the time of a Reset/Inhib signal will be completed before converter reset is initiated. Factory-set in the positive input position. START GATE Provides an external means of gating the Start circuitry in either Coincidence or Anticoincidence with the Start input signal. Start Gate input signal must cross threshold ≥10 ns prior to the Start input signal and overlap the trigger edge of the signal. Factory set in the positive input position.STOP GATE Provides an external means of gating the Stop circuitry in either Coincidence or Anticoincidence with the Stop input signal. Stop Gate input signal must cross threshold ≥10 ns prior to the Stop input signal and overlap the trigger edge of the signal. Factory set in the positive input position. OUTPUTS
TAC Front- and rear-panel BNC
connectors provide unipolar pulse. Amplitude Nominally +5 V. Complement signal selectable by PWB jumper. Time and Width From accepted Start input to end of reset. Impedance Zo <10 Ω. Rise Time ≤50 ns. Fall Time ≤50 ns.
VALID CONV Rear-panel BNC
connector provides NIM-standard slow positive logic level signal to
indicate a Valid Conversion. SCA Front- and rear-panel
connectors provide NIM-standard slow positive logic level signals. ELECTRICAL AND MECHANICAL POWER REQUIRED +24 V, 95 mA; +12 V, 210 mA; –24 V, 165 mA; –12 V, 330 mA. WEIGHTNet 1.4 kg (3 lb). Shipping 3.2 kg (7 lb). DIMENSIONS NIM-standard double-wide module 6.90 X 22.13 cm (2.70 X 8.714 in.) per DOE/ER-0457T. ORDERING INFORMATION
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