AT&T Bell System KS-16608 Test Instructions

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IIELL SYSTEM PRACTICES
AT& TCo Standard
SECTION 024-150-503
Issue 2, August 1974
KS-16608 L 1 AND
KS-16610 L 1 AMPLIFIERS
TRANSMISSION TESTS
CONTENTS
1. GENERAL
2.
RECOMMENDED TEST EQUIPMENT
3. AC LINE VOLTAGE
PAGE
2
1.05
The amplifier tests outlined below should
be performed on the service order. These
tests except the line voltage test should be made,
if possible, at the telephone office. When clearing
trouble, all tests should be performed which are
necessary to clear the trouble and at the same
time insure that the amplifier is performing properly.
4. ELECTRON TUBE TEST
2 1.06
For the purpose of these tests, the input
and output connections should be removed
5. GAIN-FREQUENCY TEST 2
from the amplifier. The power connections should
remain on terminal board TB3.
6. NOISE TEST 5
7. DISTORTION TEST
2. RECOMMENDED TEST EQUIPMENT
s
8. LIMITER TEST 7
1. GENERAL
1.01
This practice outlines the transmission tests
for the KS-16608 Ll and KS-16610 Ll
amplifiers. These are basic amplifiers which have
general application in audio frequency systems
including paging and announcement systems. The
basic amplifiers are designed so plug-in units may
be inserted in sockets to provide several input
arrangements.
1.02
This section is r'eissued to add strapping
information in 2.06 for testing the amplifier.
1.03
The KS-16607 Ll amplifier (PREAMP), the
KS-16611 Ll transformer, and the KS-16612
Ll mixer unit are plug-in units for use with either
basic amplifier. Input arrangements are shown in
Fig. 10.
1.04
Scheduled or routine tests should not be
required on these amplifiers. However, if
other work is being performed at the customer's
premises, check the audio output power and
gain-frequency response as covered in this practice.
2.01
The following testing equipment is satisfactory
for use in making these amplifier tests. If
equipment is available which is electrically equivalent
to an item in this list, it will be satisfactory for
use.
200CD Oscillator
(Hewlett-Packard)
201C Oscillator
(Hewlett-Packard)
21A TMS
AC Voltmeter
Volt-Ohm-Milliam-
meter (20K Ohms/
Volt) KS-14510
RCA Voltohmyst -
Model Junior or Senior
304H DuMont Oscillo-
scope
400-Type VTVM
(Hewlett-Packard)
KS-15560 or KS-15750
Tube Tester
5A Attenuator
2.02
There are two points to keep in mind when
making transmission tests. The first is that
GOOD equipment should be used and second, it
should be CALmRATED PROPERLY. If these
two things are observed, you are on your way
toward making some good tests. Remember, POOR
©
American Telephone and Telegraph Company, 197 4
Printed in U.S.A.
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