Westinghouse Type KR, Installation & Operating Instructions Manual

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obtained in db from the receiver curve. 40 millivolts
sensitivity represents the input signal required for
proper operation.
series with the RRH coil in place of the alarm relay.
When supervisory control is used alone, a 2000-ohm
5-watt resistor is to be connected in series with the
control relay coil. In order to maintain proper mark
space ratio, the relay bias current is adjusted for 9
milliamperes as indicated.
5. Transmitter Output and Receiver Sensitivity
Variations with Frequency (Fig. 13)
These curves show the var iation of transmitter
output and r eceiver s ensitivity with variation in
frequency, at a supply voltage of 1 29 VDC, and
25 ° C. They may be used in t h e same manner as
Fig. 1 2.
7. Receiver Filter Limits (Fig. 1 5)
The receiver RF filter and the I F filter limits
are shown on Fig. 15. Both filters are of the plug­
in type and the test circuits with pin connections
are shown at the top of each curve. The IF filter is
divided
into two s epar ate sections. The sel ectivity
shown is for each section, and the pin connections
for each section ar e also shown in the test circuit
sk etch.
6. Supervisory Control Connections ( Fig. 7)
W h e n s upervisory control is u s ed with relaying ,
the supervisory control relay coil is connected in
14
E L E C T R I C A L P A R T S L l S T
CI RCU I T
F U NCTI O N
D E SCRI PTION
SYMBOL
CAPACITORS
C-1 Rcvr. Bleeder 2.0 pi, ±20%, 200 VDC, Paper
tc- 2
Rcvr. Osc, Feedback 140/ 270 pp.f, ±20%, 500 VDC,
Mica
C-3 Rcvr. Osc. Bleeder
0.02 pi, MRC, 600 VDC,
Bypass Disc
c-5
Q-6 Emitter Bypass 1.0 pi, ±20%, 200 VDC P aper
C-6
Rcvr. Rectifier Same as C-5
Bypass
C-7
B-
to B+ Bypass 2 pi, ±10%, 600 VDC, Paper
C-8 B- to GND 1.0
p.f,
± 1 0%, 1 000 VDC, Paper
tC-9
Xmtr. Osc. Feedback Same as C-2
C- 10
Xmtr . Osc. Same as C-3
C-1 1
Key Filter 0 . 1 pi, ±20%, 200 VDC, P aper
C-1 2 Q- 10 Emitter Bypass 0. 25 pi, ±20%, 200 VDC , Paper
C- 13 Q-10 Bleeder Bypass Same as C- 1 2
C- 14 PA Bas e Bypass Same as C-1 2
tNote: 140 11pi for osc. freq. 1 10-kc and above.
270 /1/lf for osc. freq. below 1 10-kc.
MF R . MANU FACTUR E R 'S
CODE D E S I GNAT I ON
1
330C567 H 1 1
1
330C566 H43
or 330C566
H57
1 330C569 H47
1 330C567 H09
1 330C573 H07
1 330C573 H2 1
1 330C567 H02
1
330C567 H05
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