Tektronix 475A - Triggering; Differential Time Measurement (Basic 475 A)

50 MHz, with CH 2 OUT connected to CH 1 input. AC-
coupled, using a 50 0, 42-inch BNC cable, terminated in
50 0 at CH 2 Input.
TRIGGERING
Sensitivity
Ac Coupled Signal: 0.3 div internal or 50 mV external,
from 60 Hz to 25 MHz: increasing to 1.5 div, internal or
150 mV external at 100 MHz.
LF REJ Coupled Signal: 0.5 div internal or 100 mV
external, from 50 kHz to 25 MHz; increasing to 1.5 div
internal or 300 mV external at 100 MHz. Attenuates
signals below about 50 kHz.
HF REJ Coupled Signal: 0.5 div internal or 50 mV
external, from 60 Hz to 50 kHz. Attenuates signals below
about 50 Hz and above about 50 kHz.
DC Coupled Signal: 0.3 div internal or 50 mV external,
from dc to 25 MHz; increasing to 1.5 div internal or 150 mV
external at 100 MHz.
EXT + 10 Signal: Amplitude requirements are mul-
tiplied by 10.
External Trigger Input
Maximum Input Voltage: 250 V (dc + peak ac) or 250 V
p-p ac (1 kHz or less).
Level Control Range in Ext
At least + and —2 V,4 V p-p; EXT + 10 is at least + and
—20 V, 40 V p-p.
Trigger View
Deflection
Factor:
About
50
mV/div
in
EXT
and
about
500 mV/div in EXT — 10.
Risetime: 5 ns or fess.
Trigger Centering Point: Within 1.0 division of screen
center.
DIFFERENTIAL TIME
MEASUREMENT (BASIC 475A)
Accuracy for Measurements Greater than One Major
Dial Division: Within +1% from +15°C to +35°C. Within
+1.5% from —15°C to +55°C.
475A/DM44 Operators 63