Tektronix TAS 475 Service Manual

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Typical Characteristics
Table 1-20: Typical Characteristics - Triggering System (Cant.)
Name
TAS 485 Edge-Type Trigger Sensitivity,
Not
DC Coupled
Description
The typical sensitivities are as follows:
Trigger Source
Noise Reject
HFREJ
LF REJ
AC
Typical Signal Level for Stable Triggering
1.2 divisions from DC to 25 MHz, in-
creasing to 3.5 divisions at
250 MHz.
0.5 division or less will not trigger.
0.30 division from DC to 10kHz; attenu-
ates signals above the upper
-3 dB cut-
off frequency of
50 kHz.
0.30 division from 100 kHz to 25 MHz,
increasing to 1.4 division at
250 MHz;
attenuates signals below the lower
-3 dB cutoff frequency of 50 kHz.
0.30 division from 350 Hz to 25 MHz,
increasing to 1.4 division at
250 MHz;
attenuates
Signals below the -3 dB cut-
off frequency of
160 Hz.
Lowest Frequency for Successful Oper- 50 Hz with 1 division.
ation of
"Set Level to 50%" Function
Holdoff Control Range
Increases Main sweep holdoff time by a factor of
10.
Table
1-21: Typical Characteristics - Video Triggering System
Name
Field Separation
Description
Stable trigger on odd or even fields in interlaced video systems
with
line rates between 12 kHz and 17 kHz.
Table 1-22: Typical Characteristics - Z-Axis
Name
Sensitivity
Rise Time
TAS 475 and TAS 485 Service Manual
Description
The sensitivity is as follows:
Condition
DCto 2 MHz
2 MHz to
20 MHz
<15 ns.
Sensitivity
Positive voltage decreases intensity;
+2 V blanks a maximum intensity trace.
+2 V modulates a normal intensity trace.
+2 V (DC to 20 MHz) blanks a 1 I1A CRT
beam.
1-19
Scan by Zenith

Tektronix TAS 475 Specifications

General

Brand	Tektronix
Model	TAS 475
Category	Test Equipment
Language	English