Modulation Characteristics; Ctcss; Microcontroller - Tait T880 II Series Adjustment Manual

M880-00
1.2.4.2

Modulation Characteristics

Frequency Response
(below limiting)
Line And Microphone Inputs:
Pre-emphasised Response-
Bandwidth
Below Limiting
Flat Response
Above Limiting Response
Distortion
Hum And Noise:
Wide Bandwidth
Narrow Bandwidth
Compressor (optional):
Attack Time
Decay Time
Range
1.2.4.3

CTCSS

Standard Tones
Frequency Error
(from EIA tones)
Generated Tone Distortion
Generated Tone Flatness
Modulation Level
Modulated Distortion
1.2.5

Microcontroller

Auxiliary Ports:
Open Drain Type
V max.
ds
Copyright TEL
T881 General Information
.. flat or pre-emphasised (optional)
.. 300Hz to 3kHz (WB)
.. 300Hz to 2.55kHz (NB)
.. within +1, -3dB of a 6dB/octave
pre-emphasis characteristic
.. within +1, -2dB of output at 1kHz
.. within +1, -2dB of a flat response
(ref. 1kHz)
.. 2% max.
.. -48dB (300Hz to 3kHz [EIA]) typical
.. -48dB (CEPT) typical
.. 10ms
.. 800ms
.. 50dB
.. all 37 EIA group A, B and C tones
plus 13 commonly used tones
.. 0.08% max.
.. 1.2% max.
.. flat across 67 to 250.3Hz to within 1dB
.. adjustable
.. <5%
.. capable of sinking 2.25mA via 2k2Ω
.. 5V
C1.7
10/07/00