TNAG-2109-FCO40-3008-Outer-Space-Act-1986-extension-to-Hong-Kong-1990 — Page 131

indicate

the

FM reception of

realtime telemetry.

The

Synchronous Command Generator will also display sun pulse lock on its panel.

8.5.3 Tape Recorder

A simulated

PCM

data

The

stream

approximately five minutes.

from

one

of the baseband

The

equipment strings will be patched into the tape recorder. be recorded for will data time PCM

code and

Selected telemetry words from each minor frame will be printed during this period. tape will be played back and the printed telemetry words from the played-back data stream will be compared with the original data to verify correct recording.

8.5.4 Stripchart Recorder

stream will be patched into the

The strings. baseband

the

Frame

A simulated PCM data receiver in

of one Synchronizer's output will e patched into the Selectable is attached to the which Telemetry Display (STMD),

with known stripchart Recorder. Eight telemetry words

front panel. the STMD values will correctness of the data recorded on the Stripchart Recorder will be compared with the known values to verify proper recording function.

be

at selected

The

8.6

Range

The

software ranging

calibration

and

thoroughly demonstrated

on-site

acceptance

which functions

provide computation of

points will range subsystem during

factory

will following test tests. The

for

be and be

conducted during site acceptance tests.

8.6.1 Closed-Loop Ranging

The Realtime Computer, Range Tone Processor, FM Modulator, and Telemetry Receiver are configured to form an IF loop. The IF ranging calibration is initiated by the Computer and the phase counts displayed by the computer will be compared with counts displayed by the Range Tone Processor.

The delays through the RF uplink and downlink equipment will be measured during RF subsystem on-site acceptance tests. These delays and the IF loop delays will be subtracted from the total ranging delays during ranging data computation by the realtime computer.

8.6.2 Ranging System Compatibility

Ranging uplink system through the HPA will be tested with manually initiated ranging tones at the spacecraft receiver frequency (DISH or OMNI). The presence of the modulated The FM ranging tones at the HPA output will be observed. Modulator in the uplink path will be checked for correct

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