Operator`s manual

15 Signametrics
2.9.4 Pulse Width
± (% of reading + sec)
Polarity Frequency range Resolution Width range Typical
Uncertainty
Positive or negative pulse
widths
1 Hz to 100 kHz
2 µs 2 µs to 1 s 0.01 +/- 4 µs
2.9.5 Totalizer
• Active edge polarity: Positive or negative transition
• Maximum count: 10^9
• Allowed rate: 1 to 30,000 events per second
•
Uses Threshold DAC
2.10 Trigger Functions
2.10.1 External Hardware Trigger
Trigger Input voltage level range High: +3V to +15V, Low: -15V to +0.8V
Ttrigger High current drive Min. 1mA, Max 10mA (TTL or CMOS logic level)
Timing Characteristics Trigger occurs within 2/Reading rate
Trigger Activation Positive or Negative edge depending on trigger command.
Internal Reading Buffer Up to 1,000 readings/sec into 64 locations reading buffer
Isolation of trigger input ±50 V from analog DMM inputs, and from computer chassis
earth ground.
2.10.2 Analog Threshold Trigger
• Captures up to 64 readings
• Reading rate: 10 rps or higher
2.11 Source Functions (SM2044)
• Isolated to 300 V DC from PC Chassis
• Current can be paralleled with multiple SM2044s
• Voltage can be put in series with multiple SM2044s
2.11.1 DC Voltage Source
Parameter Closed Loop [1] Open Loop
Output Voltage range -10.000 V to +10.000 V
Typical Current source/sink at 5V output 5 mA 5 mA
DAC resolution 18 bits 12 bits
Accuracy 23°C ± 10°C One Year 0.015% ± 350 µV
1.0% ± 35 mV
Typical settling time 3 S (rate set to 2/s) 1 mS
Typical source resistance
250 Ω
[1] 10 rps or lower measurement rate is required for the closed loop mode.
2.11.2 AC Voltage Source
Parameter Closed Loop [1] Open Loop
Output Voltage, sine wave 50mV to 7.1 V RMS (0.14 to 20.0V peak-to-peak)
DAC resolution 16 bits 12 bits
Typical Current Drive at 3.5V RMS 3.5 mA RMS
Accuracy 18
°
C to 28
°
C One Year
ACV spec ± 2 mV ACV spec + 0.8% ± 20 mV
Typical settling time (f-out > 40 Hz) 10 s (rate set to 2 rps) 1.5 s