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 (910) 744-5050
telephone (800) 638-5577
fax (910) 744-5054
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
38 + No tone
37 = EIA 220
A
MX365A
MX165A
MX165B
MX165C
MX465
CTCSS
TONES
39 + No Tone 39 + No Tone
39 + No Tone 47 + No Tone 47 + No Tone
37 = EIA 220
B
37 = EIA 220
B
39= TIA/EIA
603
39 = TIA/EIA
603 plus
39 = TIA/EIA
603 plus
plus 97.4Hz
plus 69.3Hz &
97.4Hz
plus 69.3Hz
& 97.4Hz
159.8Hz,
183.5Hz,
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
Voltage
Min: 4.5V
Typ: 5.0V
Max: 5.5V
Min: 4.5V
Typ: 5.0V
Max: 5.5V
3.0V
3.75V
4.5V
Min: 3.0V
Typ: 3.75V
Max: 4.5V
2.75V
2.75V
Min :
Typ:
Max:
Min:
Typ:
Min:
Typ:
3.75/5.0V
5.5V
3.75/5.0V
5.5V
Max:
750mVrms
0dB 1kHz test 0dB 1kHz test
Max:
0dB ref
300mVrms
308mVrms
100mVrms
100mVrms
750mVrms
Composite 0dB 1kHz test 0dB 1kHz test 0dB 1kHz test 1kHz test
Signal
tone, -12dB
noise (band
limited 6kHz
gaussian
tone, -12dB
noise (band
limited 6kHz
gaussian
tone, -12dB
noise (band
limited 6kHz
gaussian
tone at
tone, -12dB
noise (band
limited 6kHz
gaussian
tone, -12dB
noise (band
limited 6kHz
gaussian
300mVrms,
75mVrms
noise (band
white noise), - white noise), - white noise), - limited 6kHz
white noise), - white noise), -
20dB f0
20dB f0
20dB f0
gaussian
20dB f0
20dB f0
CTCSS tone.
CTCSS tone.
CTCSS tone.
white noise),
30mVrms
CTCSS tone.
CTCSS tone.
CTCSS tone.
Page 18
20480150.001 MX-COM ꢀ 1996
CMLMICRO [ CML MICROCIRCUITS ]
