DSP-599zx Audio Noise Reduction Filter
March 6, 1997
7-1
7
Test Instrument Operation
The Test Instrument mode helps analyze signals and other equipment. It in-
cludes an audio millivoltmeter, an audio sine wave signal generator, a two-
tone generator, and a CTCSS tone encoder/decoder. Test Instrument func-
tions operate on either
A
or
B
channel. The speaker may be switched on or
off without affecting the Test Instrument functions.
Exiting from Test Instrument functions can be accomplished two different
ways.
•
Pressing
[Mode]
completely exits you from Test Instrument mode and
returns you to Voice mode.
•
Pressing the middle knob escapes you back to the Test Instrument func-
tion menu. You can then choose a different test function. You can then
select a new test function. Pressing the middle knob again will put you
back into Voice mode.
Audio Millivoltmeter
This mode measures audio voltage levels from other equipment including
microphones, TNCs, multimode controllers, and receivers. Measurements
include both peak and true RMS millivolts. Frequency response ranges from
10 Hz to 10 kHz.
The audio millivoltmeter has many applications in installation, mainte-
nance, and operation of radio and audio equipment. In EME work, the audio
millivoltmeter is useful in antenna evaluation when comparing sun noise
and cold sky noise. In VHF/UHF FM work, the audio millivoltmeter’s peak
reading capabilities allow relative measurement of peak frequency deviation
of received voice, data and control signals. When used with the CTCSS
function of the DSP-599zx, the audio millivoltmeter allows relative mea-
surement of frequency deviation of CTCSS tones received UHF and VHF
FM/PM signals.
The audio millivoltmeter displays the voltage of the audio input signal for
the selected channel. Audio millivoltmeter functions include true RMS volt-
age and peak voltage. The millivoltmeter display is also active in the sine
wave, and two-tone modes.
March 6, 1997
Summary of Contents for DSP-599zx
Page 1: ...DSP 599zx Audio Noise Reduction Filter Operating Manual March 6 1997 TECHNOLOGY INC ...
Page 56: ...4 Voice Mode 4 8 March 6 1997 ...
Page 62: ...5 CW Mode 5 6 March 6 1997 ...
Page 92: ...8 Troubleshooting 8 4 March 6 1997 ...
Page 96: ...Appendix B Glossary A 4 March 6 1997 ...
Page 98: ...Appendix C Product Warranty A 6 March 6 1997 ...
Page 100: ...Appendix D Electromagnetic Interference A 8 March 6 1997 ...
Page 102: ...Appendix E Schematic Diagrams A 10 March 6 1997 ...
Page 103: ...DSP 599zx Audio Noise Reduction Filter March 6 1997 A 11 ...
Page 104: ...Appendix E Schematic Diagrams A 12 March 6 1997 ...
Page 105: ...DSP 599zx Audio Noise Reduction Filter March 6 1997 A 13 ...
Page 106: ...Appendix E Schematic Diagrams A 14 March 6 1997 ...
