BNC 1105 Universal Counter - Manual (Page 94)

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Appendix
A. Specification List
This appendix contains the specifications of the MODEL 1105. It covers
the AC, DC, Resistance, Temperature, and Frequency/Period
characteristics under a variety of conditions. It also contains the general
characteristics and accuracy calculations for your convenience. A lot of
efforts are made to make sure these specifications serve your needs for
production, engineering and/or research purposes. All specification
applies to the MODEL 1105 unless noted otherwise.
Channel 1 & 2 Input Specifications
DC Coupled 1mHz to 400 MHz
AC Coupled
200KHz to 400 MHz (50 Ω)
30 Hz to 400 MHz (1 MΩ)
FM Tolerance FM Tolerance: 25%
Voltage Range and Sensitivity
1mH to 225 MHz
20 mVrms to ±5 V ac + dc(Medium and High)
25 mVrms to ±5 V ac + dc(Low)
225 MHz to 400 MHz 30 mVrms to ±5 V ac + dc
400 MHz to 450 MHz 40 mVrms to ±5 V ac + dc
Channel 1 & 2 Input Characteristics1
Impedance
(ATT X 1, 1 MΩ
Capacitance)
(ATT X 10, 1 MΩ
Capacitance)
1 MΩ or 50 Ω
24 pF
15 pF
Coupling AC or DC
Low-Pass Filter
100 KHz (or disabled)
–20 dB at > 1 MHz
Input Sensitivity
Selectable between Low, Medium(default), or High
Medium is approximately 1.35x High Sensitivity,
low is approximately 1.7x High Sensitivity
Internal Noise 200uVrms(typical)
Voltage Range and Sensitivity (Single-Shot Pulse)
1.5ns to 10ns Pulse 80 mVpp to 10 Vpp