SECTION III CALIBRATIONOF SWEEP GENERATOR SUBASSEMBLIES

SECTION III

C A L I B R A T I O N OF SWEEP GENERATOR SUBASSEMBLIES

M X - 8 3 6 4 ( P ) / U S M - 3 0 8 ( V ) AND MX-8364A(P)/USM-308(V)

(HP MODELS 8690A AND 8690B)

3-1. Equipment Required

Equipment required for calibration performance checks and adjustments is listed in table 3-1.

Table 3-1. Equipment and Accessories

Calibration equipment

Item

Minimun use specification

Autotransformer . . . . . . . . . . . . . 105 to 125 vac, ±3% . . . . . . . . . . . . . . . Variable Power Transformer TF-

1-1

510/U (General Radio model W10-

MT3A).

Calibrator . . . . . . . . . . . . . . . . . . . . UUT plug-in unit . . . . . . . . . . . . . . . . . . . Electrical Teat Equipment Plug-In

1-2

Unit PL-1239/USM-308(V) (Hew-

lett-Packard model K04-8690A)

Hewlett-Packard model 11531A.

Multlmeter . . . . . . . . . . . . . . . . . 0 to ±300 vdc ±0.1% . . . . . . . . . . . . . . . .

Multimeter ME-333/U (J-Omega model

1-3

217A).

Oscilloscope AN/USM-273 (Tektronix

1-4

Oacillascope . . . . . . . . . . . . . . . . . . . 0.5v/cmto6 v/cm ±3% . . . . . . . . . . . .

model 463),

voltmeter . . . . . . . . . . . . . . . . . . 0 to 6 mvac ±1% . . . . . . . . . .. . . . . . . . .

Electronic .Voltmeter AN/USM-265

1-5

(Hewlett-Packard model 400EL-02).

1-6

Adapter . . . . . . . . . . . . . . . . . . . Tee, BNC plug to 2 BCN jacks. . . . . .

Connector Adapter UG-274B/U (Amp-

henol model UG-274B/U).

Connector Adapter UG1887/U (Po-

1-7

Adapter . . . . . . . . . . . . . . . . . . . . . BNC jack to double banana plug . . . . .

mona Electronics model 1289).

1-8

Cable assembly (8 required) . . 36-inch RG58C/U, BNC plug to BNC

Pomona Electronics model BNC-C-36.

plug.

1-9

Adapter . . . . . . . . . . . . . . . . . . . . . . Binding poet to BNC plug . . . . . . . . . . . Connector Adapter UG-1888/ (Po-

mona Electronic model 1296).

1-10 Test lead . . . . . . . . . . . . . . . . . .. 24 inch, single banana to single banana . Pomona Electronics model B-24 black.

WARNING

e. Adjust autotransformer output voltage con-

Voltages in excess of 1000 volts are pre-

trol for a meter indication of 115 vat.

sent in UUT and may result in personnel

f. Set UUT LINE switch to RF and allow a

injury or lose of life.

15-minute warmup.

3-2 Preliminary Procedure

g. Position UUT controls as follows:

(1) START/CW, MARKER 1 START/CW,

a, Install calibrator (1-2) and calibrator scale

MARKER 2 STOP, and STOP/ F controls to 8

into UUT.

v on calibrator scale.

b. Energise equipment and allow sufficient time

(2) SWEEP SELECTOR switch to CW.

for equipment to warmup and stabilise.

(9) All AMPLITUDE MOD pushbuttons re-

c. Adjust autotransformer (1-1) output volt-

leased.

age control to minimum.

(4) ALC pushbutton released.

d. Connect UUT power cord to autotransform-

(5) MANUAL SWEEP control fully coun-

er.

terclockwise.