1-5
1.5
Performance Specifications
This section lists the performance specifications of the 2251A.
1.5.1
Input Characteristics
Inputs A and B available as front panel BNC connectors. Input signal may also be routed to
Channel A from any one of the internal analog SUMBUS lines on the VXIbus backplane.
Input A Frequency Range:
DC Coupled: DC to 200 MHz
AC Coupled: 10 Hz to 200 MHz
Input B Frequency Range:
DC Coupled: DC to 160 MHz
AC Coupled: 10 Hz to 160 MHz
Input Impedance:
1 Megohm or 50 Ohms, selectable
Input Attenuation:
X1 or X10, selectable
Sensitivity (Sinewave) (X1):
25 mV rms to 100 MHz, 0-55
E
C
50 mV rms to 200 MHz, 0-30
E
C
60 mV rms to 200 MHz, 30-45
E
C
70 mV rms to 200 MHz, 45-55
E
C
Sensitivity (Pulse)(X1):
75 mV pp at 5 ns pulse width
Dynamic Range (X1):
36 dB to 50 MHz (75 mVpp to 5 Vpp)
30 dB to 100 MHz (75 mVpp to 2.5 Vpp)
24 dB to 200 MHz (150 mVpp to 2.5Vpp)
Maximum Input (50 ohm input):
5 V rms
Maximum Input (1 Megohm input):
X1: 260 V (DC+AC rms), DC to 2 kHz,
decreasing to 5 Vrms at 100 kHz to 160 MHz.
X10: 260 V (DC+AC rms), DC to 20 kHz,
decreasing to 50 V rms at 100 kHz to 160
MHz..
Low Pass Filter:
50 kHz (nominal) Input A only
Crosstalk:
<-36 dB between channels, measured at 100
MHz with 50 ohms input impedance selected
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