SECTION II EQUIPMENT REQUIREMENTS

TB 11-6625-2713-50

Table 1. Calibration Description - Continued

Test instrument parameters

Performance specifications

Trigger level:

External

±3 volts minimum

External divided by 10

±30 volts minimum

Internal

From ac line

Time Base Delay Oscilloscope Plug-In Unit TD-1086/U

Coupling

Ac low and high frequency reject

Triggering ac slope

From positive or negative going position of

trigger signal.

Internal trigger sensitivity

0.5 div of deflection, minimum 50 Hz or 50

MHz.

High frequency reject

0.5 div of deflection, minimum dc to 50 MHz.

External trigger sensitivity:

50 mv peak to peak minimum 5 kHz to 50 MHz.

Low frequency reject

50 mv peak to peak minimum 5 kHz to 50 MHz.

High frequency reject

50 mv peak to peak minimum 50 Hz to 50 kHz.

50 mv peak to peak minimum dc to 50 MHz.

SECTION II

EQUIPMENT REQUIREMENTS

4. Equipment Required. Table 2 identifies the specific equipment used in this

calibration procedure. Alternate items may be used by the calibrating activity when the

equipment listed in table 2 is not available. The items selected must be verified to perform

satisfactorily prior to use and must bear evidence of current calibration. The equipment

must meet or exceed the minimum use specifications listed in table 2. The accuracies listed

in table 2 provide a four-to-one ratio between the standard and TI.

5. Accessories Required. The accessories listed in table 3 are issued as indicated in

paragraph 4 above, and are to be used in this calibration procedure. When necessary, these

items may be substituted by equivalent items unless specifically prohibited.

Table 2. Minimum Specification of Equipment Required

Common name and/or official

Manufacturer, model, and,

Item

nomenclature

Minimum use specifications

part number Level A

Autotransformer (Variable

Range: 105 To 125 Vac

General Radio Model

Power Transformer)

W10MT3AS3 (7910809)

Accuracy: ±1%

Ac Calibrator (Standard Ac

Range: 10.61 mV To 21.21 V

Hewlett-Packard, Model 745A-

Calibration (Precision)

rms

C90 (MIS-10342, Type 1)

Accuracy: ±0.75%

Digital Voltmeter

Range: -1200 To +135 Vdc; 0 To Dana, Model 5703-S-2127

1 Vac

(7912606) w/HV Probe

(7911350)

Accuracy: ±0.05%

Oscillator (Audio-Radio

Range: 5 kHz To 4 MHz 15 mV Hewlett-Packard, Model 652A

Frequency

To 12 V rms

(MIS-10224)

Square-Wave Generator

Range: 5 kHz To 1 MHz; 5 mV

Tektronix, Type 106 (MIS-

To 12 mV p-p.

10284-1)

Time Mark Generator

Range: 1 To 50 MHz

Tektronix, Type 184 MOD146B

(7912042-1)