Tektronix 2245A - Page 91

Performance Characteristics
Table 6-1 (cont)
CHARACTERISTICS
PERFORMANCE REQUIREMENTS
Delay Match
(CH 1 to CH 2)
Less than 200 ps difference.
Common Mode Rejection
Ratio (CMRR)
At least 10:1 at 50 MHz for signals of eight
divisions or less with VOLTS/DIV VAR adjusted
for best CMRR at 50 kHz.
Channel Isolation
(attenuation of
deselected channel)
10 MHz
100 MHz
2 mV/DIv to 0.5 V/Div
50 dB or more 34 dB or more
Channel isolation tested with eight-division
input signal.
Trace Shift as VAR
VOLTS/DIV is Turned
1 division or less.
Invert Trace Shift 1 division or less.
Trace Shift Between
VOLTS/DIV Switch Positions
0.2 division or less.
Trace Shift Between GND
and DC input Coupling
-10°C to 35°C
Less than 0.5 mV.
35 °C to 55° C Less than 2 mV.a
Position Range
At least ±11 divisions from graticule
center.
Input Characteristics
Resistance
1 M fl ±1%.a
Capacitance
20 pF ±1 pF.a
Capacitance Match
Between Any Two
VOLTS/DIV Settings
± 0.5 pF.
Maximum Input
Volts A
400 V (dc + peak ac); 800 V p-p at 10 kHz
or less.3 (See Figure 6-1.)
Performance Requirement not checked in manual.
2245A Operators
6-3