Tektronix TDS 420A, Service Manual, Page: 38 / 288

Warranted Characteristics
1- 16
TDS 420A, TDS 430A & TDS 460A Service Manual
Table 1- 10: Warranted Characteristics — Signal Acquisition System (Cont.)
Name Description
Analog Bandwidth, DC-50
Ω
Coupled to BNC and Band-
id h S l i i F ll
Volts/Div
TDS 420A
Bandwidth
5
TDS 430A and TDS 460A
Bandwidth
5
p
width Selection is Full
5 mV/div--10 V/div DC--200 MHz DC--400 MHz
2 mV/div--4.98 mV/div DC--150 MHz DC--250 MHz
1 mV/div--1.99 mV/div DC--95 MHz DC--100 MHz
Cross Talk (Channel Isolation) Volts/Div Isolation ( )
>
500 mV/div
≥
40:1 at 50 MHz for any two channels having equal volts/division
settings
≤
9.95 mV/div
≥
40:1 at 50 MHz for any two channels having equal volts/division
settings
10 mV/div--500 mV/div
≥
80:1 at 100 MHz and
≥
30:1 at full bandwidth for any two
channels having equal volts/division settings
Delay Between Channels, Full
Bandwidth, Equivalent Time
≤
200 ps between CH 1 and CH 2 and between CH 3 and CH 4 when both channels have equal
volts/division and coupling settings
≤
450 ps for any other combination of two channels with equal volts/division and coupling settings
Input Impedance, DC-1 M
Ω
Coupled
1 M
Ω ±
0.5% in parallel with 15 pF
±
2.0 pF. Matched between channels to within
±
1% for resistance
and
±
1.0 pF for capacitance
Input Impedance, DC-50
Ω
Coupled
(TDS 420A)
50
Ω ±
1% with VSWR
≤
1.2:1 from DC--200 MHz
Input Impedance, DC-50
Ω
Coupled
(TDS 430A and TDS 460A)
50
Ω ±
1% with VSWR
≤
1.6:1 from DC--400 MHz
Input Voltage, Maximum, Volt/Div
Rating
p g , ,
DC-1 M
Ω
, AC-1 M
Ω
, or GND
Coupled
0.1 V/div--10 V/div 300 V CAT II; derate at 20 dB/decade above 10 MHz until the
minimum rating of
±
5 V (DC + peak AC) is reached
1 mV/div--99.9 mV/div 300 V CAT II; derate at 20 dB/decade above 10 kHz until the
minimum rating of
±
5 V (DC + peak AC) is reached
Input Voltage, Maximum,
DC-50
Ω
or AC-50
Ω
Coupled
5 V
RMS
, with peaks less than or equal to
±
30 V