Teletype Dataspeed 40KDA101 Manual

BELL SYSTEM PRACTICES
AT&TCo Standard
SECTION 582-200-212
Issue 2, January 1979
"DATASPEED"* 40 KEYBOARD-DISPLAY AMPLIFIER (KDA) FEATURE
CONTENTS
PAGE
1.
GENERAL .....................
1
2. DESCRIPTION ..................
1
TECHNICAL DATA ..............
3
3. INSTALLATION ................ 4
4. OPERATIONAL TEST ............ 17
5. TROUBLE ISOLATION ........... 17
6.
DISASSEMBLY /REASSEMBL Y ..... 23
7.
PARTS ........................ 23
NUMERICAL INDEX .............
29
1. GENERAL
1.01 This section provides general description,
installation information, testing, trouble
isolation procedures, disassembly/reassembly and
parts identification for the 40KDA101 Keyboard-
Display Amplifier (Fig. 1).
1.02 This section is reissued, to add C18 to
Fig. 10 and specify TKS107 in place of
31246RM.
Fig. 1-40KDA101 Keyboard-Display Amplifier
*Registered Trademark of AT&TCo.
Note: When ordering replaceable components,
prefix each part number with the letters "TP"
(ie, TP405372), unless specified otherwise.
1.03 Two types of KDA installations, (Fig. 2)
are described in this section:
(a) Free-standing units requiring a 405982
modification kit.
(b) KDA units mounted in a 40CAB251/AC
cabinet requiring a 405983 modification
kit. Support components for use with the
KDA in a DATASPEED 40/4 system are
also described.
2. DESCRIPTION
2.01 The KDA allows for the extension of a
KD (Keyboard Display) device in an
already installed system or may be used to plan
new station layouts with a greater KD location
flexibility. It is only required when a KD is to be
more than 100 feet away from its controller (up
to 600 feet ). However if desired, the KDA can
also be used when a KD is less than 100 feet
from a controller.
2.02 The KDA may be used in maxi-cluster
station arrangements where it is desired to
place the Device Cluster Controllers (DCC) adja-
cent
to
the Station Cluster Controller (SCC) to
more closely resemble the station arrangement
that this station is replacing and thus use similar
cable runs to the devices. The use of the KDA in
such a case allows the smaller diameter cable
to be used. Similarly, when the station includes a
Mini-Cluster Controller (MCC), the use of this
smaller diameter cable may be advantageous.
2.03 The keyboard-display amplifier accepts
the low video and half-intensity signals
from the 40C400 type controller. These signals
are driven into an Emitter Coupled Logic (ECL)
line receiver by the discrete differential ampli-
fiers. The outputs are standard ECL differential
signals of 1.6 volts.
Prepared for American Telephone and. Telegraph Company by Teletype Corporation
©1976 and 1979 by Teletype Corporation
All rights reserved
Printed in U.S.A.
Pagel