2-2
Tone amplitude:
Adjustable from -40 dBm to 0 dBm (approximately 10 mV to
1.0 V)
Amplitude variation:
Less than ±0.5 dB at 0 dBm output
Output impedance:
500 Ohms, balanced to ground
Distortion:
All harmonics below the 9
th
are attenuated greater than
40 dB (Less than 1.0 % total harmonic distortion).
Control Section:
Autostart response time:
Switch selectable:
Slow = 3.5 sec.
Fast = 1.5 sec.
Motor control delay time:
20 seconds nominal
Antispace time:
Space condition greater than 250 ms
KOS delay:
Turn-on:
Space condition longer than 5 ms or upon key
down of CW-ID key
Turn-off:
Space condition longer than 500 ms or Mark
condition longer than 1 to 10 sec. (adjustable)
or 1 sec. after CW-ID key opening
KOS NPN switch transistor: Off:
+25 VDC maximum
On:
500 mA maximum
Tuning Indicator:
X - Y, 1" diameter oscilloscope display; rear panel connections
for additional oscilloscope.
Automatic Threshold Control:
Performs DC level restoration to provide correction for bias
(ATC)
distortion in received signals; can be disabled with front panel
switch.
Decision Threshold Hysteresis:
Provides switching hysteresis to provide correction of distor-
tion caused by multipath propagation effects; can be disabled
with front panel switch.
Demodulator Outputs:
Current Loop:
Two independent 250 Volt, 100 mA NPN switching transistors
that may be connected to the internal 175 Volt, 50 mA loop
power supply or to external supplies.
EIS - RS-232C compatible:
Mark = –12 VDC
Space = +12 VDC
MIL-STD-188C Compatible:
Mark = +6 VDC
Space = –6 VDC
CMOS compatible:
(4000 series, +12 supply): Pre-autostart data:
Mark = 0 to +3.6 VDC
Space = +8.4 to +12.0 VDC
Post-autostart data: Mark = 0 to +3,6 VDC
Space = +8.4 to +12.0 VDC
Summary of Contents for ST-6000
Page 1: ...ST 6000 FSK DEMODULATOR...
Page 14: ...3 3...
Page 15: ...3 4...
Page 17: ...3 6 Figure 3 DS 2000 and ST 6000 System Connection Schematic...
Page 19: ...3 8 Figure 3 2 Loop Connections to the ST 6000...
Page 20: ...3 9 Figure 3 3 RS 232 I O Connections to the ST 6000...
Page 24: ...3 13 Figure 3 5 Alternate Loop Connections...
Page 25: ...3 14 Figure 3 6 Connections for the ST 6000 for Full Duplex Operation...
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