Power Supply And dc Adjustments

TB-9-5915-214-35 Calibrator Procedure for Tunable Active Filter Krohn-Hite Model Manual
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TB 9-5915-214-35

b. Connect TI to a 115 V ac source.

c. Press POWER pushbutton to ON and allow at least 20 minutes for equipment to

warm up.

15. Power Supply And dc Adjustments

a. Connect digital multimeter to microprocessor card TP 6 and card ground (fig. 1).

b. Adjust R105 (fig. 1), located to the left of the rear panel CH 1 INPUT BNC

connector for digital multimeter indication of -15 V 0.05 V.

c. Connect digital multimeter to microprocessor card TP 5 and card ground (fig. 1).

d. Adjust R102 (fig. 1) for digital multimeter indication of +15 V 0.05 V.

e. Connect digital multimeter to microprocessor card TP 7 and TP 8 individually, and

card ground (fig. 1).

Verify digital multimeter indicates +5 V 0.2 V for both test points.

16. 1st Quadriatic Frequency

NOTE

Perform procedures of paragraphs 16 through 19 using CH 1,

then repeat procedures using CH 2. When performing CH 2

adjustments, add the number 200 to all capacitor or resistor

references. For example referenced in step j below for CH 1 is

C167. When performing the same procedure for CH 2, the

capacitor would be C367.

a. Press MODE parameter key until CUTOFF FREQUENCY display indicates L.P.

b. Press INPUT(db) ∇ and OUTPUT GAIN(db) ∇ control keys until displays indicate 00.

c. Press TYPE parameter key until CUTOFF FREQUENCY display indicates bu.

d. Press SHIFT parameter key.

e. Press TYPE parameter key; dC should be displayed in the CUTOFF

FREQUENCY display. If CUTOFF FREQUENCY display does not indicate dC, repeat

steps d and e until dC is displayed.

f. Press corresponding keys as listed in (1) through (4) below and verify CUTOFF

FREQUENCY indicates 25.00.

(1)

2 data entry key.

(2)

5 data entry key.

(3)

KILO parameter key.

(4)

FREQ parameter key.