SECTION I IDENTIFICATION AND DESCRIPTION

SECTION I.

IDENTIFICATION AND DESCRIPTION

1. Test Instrument Identification.

This bulletin

2. Calibration Data Card, DA Form 2416. a. Forms,

provides instructions for the calibration of Automatic

records, and reports required for calibration personnel at

Video

Corrector,

Tektronix,

Model

1440.The

all levels are prescribed by TM 38-750. DA Form 2416

manufacturer's instruction manual was used as the

must be annotated in accordance with TM 38-750 for

prime data source in compiling these instructions. The

each calibration performed.

b. Adjustments to be reported on DA Form 2416 are

automatic video corrector will be referred to as the "TI"

(test instrument) throughout this bulletin.

designated (R) at the end of the sentence in which they

a. Model Variations. None.

appear. Report only those adjustments made and

b. Time and Technique. The time required for this

designated with (R).

calibration is approximately 4 hours, using the dc and low

frequency technique.

Calibration Description.

Test instrument

parameters and performance specifications which

pertain to this calibration are listed in table 1.

Table 1. Calibration Description

Test Instrument Parameters

Performance Specifications

Timing

Verifies proper timing of oscillator, sync, and gating circuits.

Program compensation

Verifies proper function of gain control circuits in both "auto"

and "preset" modes.

Line time non-linear distortion

0.5% verified with differentiated unmodulated staircase.

Pedestal intermodulation

0.5 IRE units (3.6 mv) or less.

Chrominance and luminance delay

10 ns or less.

Signal delay

Introduces less than 5 degrees phase shift of burst signal.

Demodulator control

Verifies proper control of VIR signal to O-carrier

reference signal ratio.