Description - TM-5-6350-262-14-120008

b. The information transfer between the

printed wiring boards (pwbs),two of which are spacer

stack mounted to a base mounting plate, and the third

transmitter and receiver is accomplished by means of a

which is connected to the first through pin and socket

monologue (status conditions sent one-way from

connections. The mounting plate is fabricated from 1/8

transmitter to receiver) time division multiplex (TDM)

inch aluminum. The pwbs are protected by means of an

system The system utilizes a 12-bit word structure and is

aluminum cover which is secured to the base plate by

transmitted using the FSK (frequency shift keyed)

means of four 6-32 screws. Provision is made to install a

technique.

c. Three status indications are provided at the

special coding plug into an integrated circuit (IC) socket

which allows the code pattern of the data transmitter to

output of the data receiver: alarm/no alarm,

the receiver to be changed.

access/secure, and power fail/no power fail.

(1) The alarm status is set by any one of the

NOTE

following conditions being true:

The identification number of the code

(a) ALARM-I (alarm instantaneous) is set at

plug in the transmitter must always

the transmitter input.

match that of the code plug in the

(b) ALAIRM-L (alarm latched) is set at the

receiver or an error condition will be

transmitter input.

evident.

any word being received from the transmitter (ten lost

b. Data Receiver. The data receiver is shown in

words).

figure 1-1. The receiver consists of a cabinet, four pwbs,

(d) Five or more incorrect cipher bits are

an input/output connector, a line fault reset switch, and a

detected during a 25-second time interval.

line fault indicator. The data receiver is electrically and

(2) The no alarm status is set whenever none

mechanically connected to either an alarm module

of the above conditions are true.

(Monitor Module, Alarm ID-1922( )/FSS-9(V) or a status

(3) The access status is set whenever the

module (Monitor Module, Status ID-1921( )/FSS-9(V)),

ACCESS/TEST-RESET/SECURE switch in the control

which in turn is located in the monitor module. The

unit is set to the ACCESS or TEST-RESET position.

receiver input/output connections are made to the alarm

(4) The secure status is set whenever the

or status module by means of a single 16-pin connector

ACCESS/TEST-RESET/SECURE switch in the control

which plugs into the module. The receiver is held in

unit is set to the SECURE position.

place (after being plugged in) by four captive screws.

(5) The power fail status is set whenever a

The line fault indicator serves to indicate the presence of

power failure condition exists in the control unit.

an error condition and is reset by the line fault reset

d. A line fault error condition is set at the receiver

switch (refer to figure 1-3) A coding plug is provided in

(line fault indicator on) whenever one of the following

the receiver to allow the bit pattern from the transmitter

events occur:

to be correctly decoded at the receiver.

(1) Each time power is applied to the DTS-I.

NOTE

(2) Three or more parity errors occur in

The identification number of the code

Sequence

plug in the receiver must always

(3) The input level at the transmission line

match that of the code plug in the

goes below -45 dBm for one second or longer.

transmitter or an error condition will

(4) Five or more parity errors occur within a

be evident.

25 second time period.

1-9. Description

a. Data Transmitter.

The data transmitter is

shown in figure 1-1. The transmitter consists of three

1-4