Description of Equipment

TM 11-5895-833-12/NAVELEX 0967-LP-550-1010/TO 31R5-2TSC54-91

changeable with Electronic Frequency Converter CV-

Hertz (MHz) signals from the AN/TSC-54 modulation

3084/MSC-46(V) and converts either a 70-MHz if. or 700

equipment are up-converted by the frequency con-

MHz-if.signal from the associated modulation equipment

version subsystem to radio-frequency (rf) carrier signals

into 7.9- to 8.4-GHz transmit carrier signals. Differences

in the 7.9- to 8.4-GigaHertz (GHz) band. Receive carrier

between

Electronic

Frequency

Converter

CV-

frequencies in the 7.25- to 7.75-GHz band from the

30841MSC-46(V) and Electronic Frequency Converter

AN/TSC-54 low-noise preamplifier equipment are down-

CV-3084A/MSC-46(V) are defined within the applicable

converted to 70-MHz intermediate frequency (if.) signals

paragraphs of this technical manual. Unless otherwise

for application to the AN/TSC-54 demodulation

specified, the data contained herein will apply to both

equipment.

converter configurations.

Optional use frequency conversion

(3) Microwave signal combiner. The microwave

equipment is available that will permit wide-band if

access at 700 MHz. The use of this equipment, not a

signal combiner, connected to the rf output of each up-

part of the AN/TSC-54 frequency conversion subsystem,

converter ((1) above), combines the rf outputs of the in-

will permit up-conversion of 700-MHz signals to the

dividual up-converters.The composite rf output of the

specified rf carrier signals, and down-conversion of

signal combiner is applied to the ANPTSC-54 output

specified carriers to 700-MHz if. signals.

waveguide interface.

(4) Test translator.The test translator, mounted

in the down-converter cabinet, permits back-to-back

1-8.Description of Equipment

testing of the frequency conversion subsystem without

(fig.1-1)

the use of a satellite. The test translator accepts the 7.9-

a. The frequency conversion subsystem permits

to 8.4-GHz transmit signal output of an up-con- verter

the configuration of individual ANITSC-54 terminals with

((1) above) and translates this signal to provide a 7.25- to

up to three transmit and receive carriers. The

7.75-GHz signal. The test translator also pro- vides 5-

reconfiguration of any terminal is accomplished by the

and 70-MHz signals. The 5-MHz signal is used as a

addition or removal of frequency converters and as-

backup for the 5-MHz signal from the cesium beam

sociated frequency synthesizers.

frequency standard and the 70-MHz signal serves as an

b. Each configuration provides the same carrier

up-converter test input.

characteristics except for the numbers of transmit and

Converter,Frequency,Electronic

CV-

(5)

receive carriers provided and consists of a combination

3085/MSC-46(V).Each Electronic Frequency Converter

of the equipments described in (1) through (13) below.

CV-3085/MSC-46(V) (down-converter) converts the

The cabinets are prewired for any desired configura-

7.25- to 7.75-GHz rf carrier signal into a 700- MHz if. test

tion. Cabinet blowers are provided on the frequency

output and the 70-MHz IF signal. The 70- MHz IF signal

conversion subsystem cabinets and each cabinet con-

outputs of each down-converter are applied to the

tains provisions for an air filter at the bottom on the outer

associated AN/ITSC-54 demodulation equipment.

side. Each cabinet includes a utility outlet on the top

Converter,Frequency,Electronic

CV-

(6)

cover panel front. All equipment is of unitized con-

3085A/MSC-46(V) (Optional).This converter is directly

struction and individually drawer-mounted so that

maintenance can be performed from the front or the

interchangeable with Electronic Frequency Converter

assembly can be withdrawn for replacement and main-

CV-3085/MSC-46(V) and converts 7.25- to 7.75-GHz rf

tenance in Electronic Equipment Maintenance Shelter S-

carrier signals into 70 MHz if. or 700 MHz if. for

483PTSC-54 or other prescribed maintenance areas.

application to the associated demodulation equipment.

Extender tracks are used throughout to facilitate ac- cess

Differences between Electronic Frequency Converter

to components. Meters, indicators, and auditory devices

CV-30851MSC-46(V)

and

Electronic

Frequency

are used throughout the equipment to monitor operation.

Converter CV-3085AIMSC-46(V) are defined within the

(1) Converter, Frequency, Electronic CV-

applicable paragraphs of this technical manual. Unless

3084/MSC-46(V).Each Electronic Frequency Converter

otherwise specified, the data contained herein will apply

CV-3084/MSC-46(V) (up-converter) converts a 70-MHz if

to both converter configurations.

(7) Microwave signal divider. The microwave

signal from the associated AN/TSC-54 modulation

equipment or a 700-MHz IF Test signal to the 7.9- to 8.4-

signal divider, connected between the receive output

GHz transmit carrier signals.The 7.9- to 8.4-GHz output

termination of the system waveguide interface and the rf

of each up-converter is applied to a microwave signal

inputs of the individual down-converters, applies the

combiner ((3) below); The 700 MHz IF TEST inputs are

composite 7.25- to 7.75-GHz receive signal to Elec-

terminated at jacks on the top of the frequency converter

tronic Frequency Converters CV-3085/MSC-46(V).

(8) Synthesizer, Electrical Frequency

cabinets.

(2) Converter, Frequency, Electronic CV-3084A/-

MSC-46(V) (optional).This converter is directly inter-

1-2