User Manual

5.2 Analog Input Section
86
Input module specifications are described here.
Measurement error caused by sig-
nal source impedance
• Errors occur when the signal source
impedance is greater than the input
impedance of the module.
• The input impedance of the Model
8936 Analog Unit is 1 MΩ. Errors of
about 0.1% occur when the signal
source impedance is 1 kΩ.
5.2 Analog Input Section
Measurement
Error
Es 1
Rin
Rs Rin+
-----------------------
–
[V
]
Es: signal voltage
Rs: signal source impedance
Rin: input impedance
=
5.2.1 Model 8936 Analog Unit
Temperature and humidity
range for guaranteed
accuracy
Period of guaranteed
accuracy
23 ±5°C(73±9°F), 35 to 80% RH (when zero adjustment is executed 30 minutes after
power on)
1 year
Measurement ranges 5 m, 10 m, 20 m, 50 m, 100 m, 200 m, 500 m, 1, 2, 5, 10, 20 V/div
DC amplitude accuracy ±0.4%f.s.
Zero position accuracy ±0.1%f.s. (after zero adjustment)
Temperature characteristic Gain: ±0.025%f.s./°C
Zero position: ±0.02%f.s./°C (after zero adjustment)
Frequency characteristic DC coupling: DC to 400 kHz ±3 dB
AC coupling: 7 Hz to 400 kHz ±3 dB (low cut-off frequency: 7 Hz±20%)
Noise 450 μV p-p typ., 750 μV p-p max.
(sensitivity range, with input shorted) (S/N 2004-041018235 and later)
Common mode rejection
ratio
80 dB minimum (at 50/60 Hz and with signal source resistance 100 Ω maximum)
Low-pass filter OFF, 5±50%, 500±50%, 5k±50%, 100k±50% (Hz) -3 dB
Input type Unbalanced (input isolated from output)
Input coupling DC, GND, AC
Input resistance 1 MΩ±1%
Input capacitance 30 pF±10 pF (at 100 kHz)
A/D resolution 12 bits
Voltage axis resolution 80 points/div (with 1X magnification)
Maximum sampling rate 1 MS/s (sampling period: 1 μs)
Input terminals Insulated BNC terminal
Maximum input voltage 400 VDC
Maximum rated voltage to
earth
370 VAC/DC (between each input channel and chassis, and between input channels)
Operating temperature and
humidity ranges
Same as the host Memory HiCorder
Operating environment Same as the host Memory HiCorder
Storage temperature and
humidity ranges
-10 to 50°C (14 to 122°F), 80% RH or less (non-condensating)
Effect of radiated radio-
frequency electromagnetic
field
±2%f.s. at 3 V/m max.