Tektronix 2235A Instruction Manual page 14

Specifications
-
2235A
Instruction
Table
1-1
(cont)
Characteristics
Bandwidth (-3 dB) (cont)
Performance Requirements
5 mV per Division to
5 V per Division
2 mV per Division
Bandwidth Limiter
Dc to at least 90 MHz.a
Dc to at least 80 MHz.a
AC Coupled Lower Limit
I
Upper limits (-3 dB) bandpass at 20 MHz
+
10%.
Measured with a vertically centered 6-division reference signal
from a 50
a
source driving a 50
a
coaxial cable that is terminated
in 50 a , both at the input connector and at the probe input, with the
VOLTSIDIV Variable control in the CAL detent.
10 Hz or less at -3 dB.a
lnput Characteristics
I
AC Coupled Lower
Cutoff Frequency
Chop Mode Switching Rate
10 Hz or less at -3 dB.a
500 kHz *30%.a
Maximum Safe lnput Voltage
A
Resistance
Capacitance
I
See Figure 1-1 for derating curve.
1 M a +2%.a
20 pF
*
2 P F . ~
Checked at 10 mV per division for common-mode signals of 6
divisions or less with VOLTSIDIV Variable control adjusted for
best CMRR at 50 kHz.
DC Coupled
AC Coupled
Common-Mode Rejection Ratio (CMRR)
lnput Current
400 V (dc
+
peak ac) or 800 V ac p-p to 10 kHz or less.a
400 V (dc
+
peak ac) or 800 V ac p-p to 10 kHz or less.a
At least 10 to 1 at 50 MHz.
1 nA or less (0.5 division or less trace shift when switching
between DC and GND input coupling with the VOLTSIDIV switch
at 2 mV per division).a
Trace Shift as VOLTS/DIV
Variable Control is Rotated
Trace Shift with VoltsIDiv Switch Rotation
I
1.0 division or 1ess.a
0.75 division or 1ess.a
VOLTSIDIV Variable control in CAL detent.
Trace Shift with Invert
Channel Isolation
REV APR 1990
1.5 division or less.a
Greater than 100 to 1 at 50 MHz.
POSITION Control Range
Scans by ARTEK MEDL4 =>
At least
5
11 division from graticule center.
a Performance Requirement not checked in Service Manual.