Tektronix 455 User Manual

Instrument Options—455/A2/B2
OPTION 5
Option 5 adds a sync separator which provides additional processing for trigger signals to facilitate observation of composite
video and related television waveforms.
Added circuitry provides amplification, selectable polarity inversion, clipping, and sync recognition. The output of this circuitry
supplies both vertical (field-rate) and horizontal (line-rate) trigger signals to the A TRIGGER COUPLING switch and supplies
horizontal (line-rate) trigger signals to the B (DLY'D) TRIGGER SOURCE switch.
The sync separator operates from either sync-negative or sync-positive video sources, 405 to 1201 lines, 50 or 60 Hz field rate.
The A SOURCE switch determines the source of the signal supplied to the sync separator.
SPECIFICATION
The standard B2 Horizontal Module characteristics are appli
cable except as noted below:
1. The sync separator provides stable triggering of A Sweep
at the line or field rate and stable triggering of B Sweep at
the line rate. Accepts sync-positive or sync-negative com
posite video, 405 to 1201 line, 50 or 60 Hz field rate.
2. Adds 2 positions to the A COUPLING switch (FIELD
and TV LINE). Adds 1 position to the B SOURCE switch
(TV LINE).
3. Sensitivity. See Table 1.
TABLE 1
Sync Separator Trigger Sensitivity
A SOURCE
Switch
Type of Signal SENSITIVITY
Min
Max
NORM
Composite video (nominal)1 2 div 20 div
CH 1, CH 2
Composite Sync
EXT
Composite video (nominal)1
200 mV
4 V
Composite sync
75 mV
4 V
EXT -t- 10
Composite video (nominal)1
2.0 V 40 V
Composite sync
750 mV 40 V
1 Peak Video ~ 7/3 sync amplitude.
REV. B, APR. 1977
Option 5 Page 1

Tektronix 455 Specifications

General

Brand	Tektronix
Model	455
Category	Test Equipment
Language	English