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APPENDIX A
SPECIAL APPLICATION DATA
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GENERAL
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This Appendix contains useful application data for operating the 1500B
Receiver in communication systems utilizing various transmission modes.
A.Z
DEFINITIONS
Definitions of the terms used in the following examples are listed
below:
f
=
Carrier frequency of transmitter or exciter
c
(herein called exciter) as indicated by the
frequency settings, whether or not the carrier
is suppressed.
f(l500B)
=
Operating frequency of 1500B used to
calculate the crystal frequencies or to
set the frequency switches on an associated
1550 Synthesizer.
fx
=
Calculated 1500B crystal frequency.
'
Al
=
Modulation designator for on-off keying of a
continuous-wave (CW) carrier by the modulating
signal, without the use of any other modulation.
Fl
=
Modulation designator for Frequency-Shift-Keying
(FSK) where the frequency of a continuous-wave
carrier is shifted between two predetermined
frequencies by the modulating signal.
A7J
=
Designator for keying (any type of keying: on-off,
amplitude, frequency-shift, etc.) by a modulating
signal of independent sub-carriers in frequency
division multiplex systems, which in turn amplitude
modulate a continuous wave-carrier.
Example:
Single sideband, suppressed carrier, single
sub-carrier (single sideband emissions with suppressed
carrier modulated only by a single sub-carrier are
classified as if the sub-carrier were the main carrier.)
A3H
=
Designator for amplitude-modulation of a continuous
wave carrier by the modulating signal.
Example:
Single sideband, full carrier.
Al
