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ST-8000 |
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The ST-8000 HF Modem (MD-1232/G) is a high-performance,
fully adjustable modulator/demodulator for use in high
frequency radio data systems. The HF modem offers
no-compromise performance to assure optimum RTTY and CW
operation under all signal conditions. The user-friendly
front panel controls eliminate long training periods for new
station operators; operation is simple without sacrificing
flexibility or performance. The national stock number of the
ST-8000 (MD-1232/G) is 5895-01-264-1756.
The ST-8000 audio tone frequencies are fully tunable between
400 and 4000 Hz for FSK (Frequency Shift Keyed) or OOK
(On-Off Keyed) applications. Receive filter and transmit
tones frequencies are synthesized from a quartz oscillator
under microprocessor control, assuring high stability and
1.0 Hz resolution. All tuning adjustments are easily made
with front panel controls or by remote control. The operator
may set either Mark and Space frequencies or Center and
Shift frequencies when tuning. When the baud rate is set
(10-1200 baud), the microprocessor computes and sets optimum
bandwidths for the Input, Mark, Space and Low-Pass filters.
Eight programmable non-volatile memories are available for
retention of commonly used receive and transmit parameters.
The memory controls also allow split-frequency operation,
using different receive and transmit tone frequencies.
Either hard-limiting FM or AGC-controlled AM signal
processing may be used, providing a very wide dynamic range
in either mode. The user has a choice of four data detection
modes: Mark/Space(M/S), Digital Multipath Correction (MP),
Mark Only (MO), or Space Only (SO). All FSK and OOK
teleprinter codes and Morse code (CW) may be demodulated by
the ST-8000. Digital regeneration and code/speed conversion
capability is included for serial asynchronous ASCII and
Baudot codes as data rates from 45 to 1200 baud.
Front panel adjustable Print Squelch permits tailoring of
the signal/no-signal threshold to your receiving system and
conditions. LOS (Loss of Signal) and PRINT indicators show
squelch. The exclusive HAL Infinite Resolution Diversity
control provides a positive selection of diversity channel,
based upon channel signal strength. The operator has front
panel control of antispace and transmit/receive Mark/Space
polarity. The transmitter PTT (Push-to-talk) control line
may be controlled manually, by the ST-8000 internal KOS
(Keyboard Operated Switch), or by external control signals
from the data terminal.
The tuning indicator is a 1.5" x 2.0" CRT that shows both
the standard crossed-ellipse Mark-Space and the exclusive
HAL Spectra-tune audio frequency spectrum display. The
ST-8000 may be operated from 100-130 or 200-250 VAC power
lines at 44-440 Hz. The 3.5" high by 12" deep cabinet mounts
in a standard 19" rack. Careful attention has been given to
RFI shielding and filtering to assure reliable radio system
performance. |
Data Sheet:
ST-8000
PDF
(43k)
Site Links:
DSRTTY-Win Terminal Software for Windows
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