DB1065 Datasheet, PDF (18/23 Pages) CML Microcircuits – CTCSS Encoder / Decoder Development Kit

Make sure the power supplies used are sufficiently noise free. Also make sure there are no
unintended noise sources radiating into the test setup.
7.2 If you still need help
If you have read this section, reexamined your test setup, and still cannot figure out what is
wrong, please contact us for additional assistance. Please be ready to describe the problem or
symptoms and the steps you have taken to try to correct them. We can be reached at
MX-COM, Inc.
4800 Bethania Station Rd.
Winston-Salem, NC 27105-1201
 telephone [phone]
 telephone [phone]
 fax [phone]
8. Retrofitting from older designs
The following is a brief list of differences between older generation MX-COM CTCSS
encoder/decoders and the MX465. For full details refer to each device’s individual data sheets.
8.1 Comparison Specifications
MX365 MX365A MX165A MX165B MX165C MX465
CTCSS 38 + No tone 39 + No Tone 39 + No Tone 39 + No Tone 47 + No Tone 47 + No Tone
TONES 37 = EIA 220 37 = EIA 220 37 = EIA 220 39= TIA/EIA 39 = TIA/EIA 39 = TIA/EIA
A
plus 97.4Hz
B
plus 69.3Hz
& 97.4Hz
B
603
plus 69.3Hz &
97.4Hz
603 plus
159.8Hz,
183.5Hz,
603 plus
159.8Hz,
183.5Hz,
189.9Hz,
189.9Hz,
196.6Hz,
196.6Hz,
199.5Hz,
199.5Hz,
206.5Hz,
206.5Hz,
229.1Hz,
229.1Hz,
254.1Hz
254.1Hz
Supply Min: 4.5V
Min: 4.5V
Min : 3.0V
Min: 3.0V
Min: 2.75V
Min: 2.75V
Voltage
Typ: 5.0V
Max: 5.5V
Typ: 5.0V
Max: 5.5V
Typ: 3.75V
Max: 4.5V
Typ: 3.75V
Max: 4.5V
Typ:
3.75/5.0V
Typ:
3.75/5.0V
Max: 5.5V
Max: 5.5V
0dB ref 300mVrms
308mVrms
100mVrms
100mVrms
750mVrms
750mVrms
Composite 0dB 1kHz test 0dB 1kHz test 0dB 1kHz test 1kHz test
0dB 1kHz test 0dB 1kHz test
Signal tone, -12dB tone, -12dB tone, -12dB tone at
tone, -12dB tone, -12dB
noise (band noise (band noise (band 300mVrms, noise (band noise (band
limited 6kHz limited 6kHz limited 6kHz 75mVrms
limited 6kHz limited 6kHz
gaussian
gaussian
gaussian
noise (band gaussian
gaussian
white noise), - white noise), - white noise), - limited 6kHz white noise), - white noise), -
20dB f0
20dB f0
20dB f0
gaussian
CTCSS tone. CTCSS tone. CTCSS tone. white noise),
20dB f0
20dB f0
CTCSS tone. CTCSS tone.
30mVrms
CTCSS tone.
20480150.001 MX-COM
1996
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