
4General Information
Specications
Frequency
Shaft shaft Hz to Hz
Chop slots shaft Hz to Hz (2‑slot blade)
Hz to kHz (10/100‑slot blade)
Sources (4) Internal Clock, VCO, AC Line, Ext Sync
Accuracy ±20 ppm
Stability ±20 ppm/year
Resolution 6 digits
Multiplier, ninteger, 1–200
Divisor, minteger, 1–200
Phase
Resolution
Jier (opt, rms)
(preliminary)
Slot Count at min at min at max
2(Hz) (Hz) (Hz)
5(Hz) (Hz) (kHz)
6(Hz) (Hz) (kHz)
10 (Hz) (Hz) (kHz)
25 (Hz) (Hz) (kHz)
30 (Hz) (Hz) (kHz)
100 (Hz) (Hz) (kHz)
jitter opt jitter μs
chop period μs360opt
Inputs (2 BNCs)
Impedance M
VCO Voltage 0 to +10 V dc
VCO Accuracy (typ.) ±100 ppm
Ext Sync TTL Minimum 2 V logic level
Ext Sync Sine 100 mV rms to 1 V rms signal, AC‑coupled (>1 Hz)
Edge Trigger TTL Rising, TTL Falling, or Sinusoidal
Outputs (6 BNCs)
Voltage 0 V to +5 V logic levels, sourced through
Signals Source, Shaft (1 PPR), Inner Slots, Outer Slots,
Sum OUTER INNER, Dierence OUTER INNER
Operation
Control Modes Chopping: synchronize Shaft, Inner, or Outer to source
Shuer: xed angular position
Remote Interface USB type B receptacle; serial port emulation, 115,200 baud
Temperature +C to +C
Power <W, 90–250 Vac, 50/60 Hz
Dimensions
Controller 8.3” 4.1” 9.2” (WHL)
Head with Shroud 4.31” 4.65” 3.75” (WHL)
Weight
Controller 4.6 lbs
Head with Shroud 1.2 lbs
SR542 Precision Optical Chopper