Specifications—455/A2/B2
TABLE 1-4 (continued)
Electrical (A2 Vertical Module)
Characteristic
Performance Requirement
Supplemental Information
Common-Mode Rejection Ratio
(ADD Mode with CH 2 Inverted)
At least 10:1 at 10 MHz for common
mode signals of 6 div or less with
GAIN adjusted for best CMRR at
50 kHz.
Step Atten Balance
+20° C to +30° C
0.2 div or less.
Trace Shift as VAR is rotated
2.0 div or less.
INVERT Trace Shift
Less than 2 div when switching from
normal to inverted.
Input Gate Current
—15°C to +30°C
0.5 nA or less (0.1 div at 5 mV/div).
+30°C to +55°C
4.0 nA or less (0.8 div at 5 mV/div).
Channel Isolation
At least 100:1 at 20 MHz.
Position Range
At least +12 and —12 div from
graticule center.
Chopped Mode Repetition Rate
Approximately 250 kHz.
250 kHz within 20%.
Input Resistance and Capacitance
1 M£2 within 2% paralleled by approxi
mately 20 pF within 3%.
Aberrations 2% or less using a 1 M£2,
20 pF input time constant normalizer
(+20° C to +30° C).
Maximum Input Voltage
DC Coupled
250 V (dc + Peak ac) or 500 V p-p ac
at 1 kHz or less.
AC Coupled
250 V (dc + Peak ac) or 500 V p-p ac
at 1 kHz or less.
Cascaded Operation (CH 2 OUT
into CH 1)
Bandwidth
DC to at least 20 MHz.
CH 2 OUT into CH 1 input using
50 SI 42" cable terminated in 50 £2
at CH 1 input.
Cascaded Sensitivity
Approximately 1 mV/div when termi
nated in 50 SI at CH 1 input with both
CH 1 and CH 2 VOLTS/DIV switches
set at 5 mV/div.
Within -30% , +30%.
Channel 2 Signal Output
(Through Main Module CH 2
OUT Connector)
Output Voltage
Approximately 50 mV/div into 1 M£2.
Approximately 25 mV/div into 50 SI.
Output Resistance
Approximately 50 SI.
Bandwidth DC to at least 20 MHz into 50 £2.
DC Level Approximately 0 V.
1-6
REV. C, MAY, 1978
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