1
8.4
to record iii) Ability
and receive recorder will be demonstrated.
Command
time
from the tape
the The commanding software functions will provide for
as well as screening of critical and forbidden commands transmission, verification, and execution of commands in will be thoroughly demonstrated during
various subsystem
modes
and factory tests
on-site
acceptance
tests.
The will be conducted during the site
8.5
and executed through the
following
acceptance tests:
i)
Selected
computer-generated
and
manually
synchronous and
commands non-synchronous
entered will be
transmitted, verified
following path:
Realtime Computer
Frame Sync
Synchronous Command Gen.
T&C Simulator
Telemetry Receiver
PSK Demodulator Bit Sync
Command transmission and execution are visually confirmed by the displays on the T&C Stimulator and/or the Realtime Computer terminal.
ii)
Command uplink system through the HPA will be tested computer-generated continuous command tone at the spacecraft frequency (DISH or OMNI). The loading, transmission, and execution of commands will be observed at the front panel of the Synchronous Command Generator. The presence of the modulated command frequency at the output of the IPA will be observed. The FM Modulator in the uplink path will be checked for correct modulation index while the command tone is being generated.
Telemetry
8.5.1 PCM Data
The telemetry processing software functions which provide for decommutation, conversion, and display of telemetry data from a given encoder will be thoroughly demonstrated during subsystem Factory and on-site acceptance tests. following test will be conducted during the Site Acceptance Tests:
8.5.2 FM Data
received.
The
Frequency modulated (FM) data from the T&C Simulator will The Receiver lock indicator and the sun pulse and Master Index Pulse lights on the FM Detector will
be
25
: