DEPARTMENT OF THE ARMY TECHNICAL BULLETIN

TB 11-6625-2713-50

CHANGE 1

DEPARTMENT OF THE ARMY TECHNICAL BULLETIN

CALIBRATION PROCEDURE FOR

OSCILLOSCOPE AN/USM-296A

(NSN 6625-00-115-9201)

Headquarters, Department of the Army, Washington, DC

17 June 1980

TB 11-6625-2713-50, 29 December 1978, is changed as follows:

Page 4, paragraph 7a(6), line 1. "CH 1" is changed to read: CH 2.

Paragraph 8a(6), line 2. "CH 1" is changed to read: CH 2.

Paragraph 8a(8), line 1. "CH 1" is changed to read: CH 2.

Paragraph 9a(2), line 2. "CH 1" is changed to read: CH 2

Paragraph 9a(3), line 1. "CH 1" is changed to read: CH 2.

Page 5, paragraph 9a(5) and (6) are superseded as follows:

(5) Set TI VERTICAL MODE to CH 2.

(6) Repeat steps (*3) and (4) above for channel 2.

(7) Connect digital voltmeter (A3) to junction of A2A3R9 and A2A3R20 (fig. 2) and

chassis ground. If digital voltmeter does not indicate zero voltage ±50 mV, perform b(1)

below.

(8) Set TI VERTICAL MODE to CH 1. If digital voltmeter does not indicate zero

voltage ±50 mV, perform b(2) below.

(9) Set TI VERTICAL MODE to CH 1.

PIN: 015255-001