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FM Radio Tuner Crestron C2N-TFM
20 • FM Radio Tuner: C2N-TFM Operations Guide - DOC. 6233A
C2N-TFM Digital Input and Output Signal Descriptions (continued)
SIGNAL TYPE AND
NAME DESCRIPTION
Inputs: <FM_Scan+>,
<FM_Scan->
Scans through FM stations on the rising edge of
the input.
Users can scan for stations by pressing the local
up (k) and down (j) buttons on the C2N-TFM
when the unit is in SCAN mode; or from remote
buttons defined on a touchpanel or other interface.
The tuner will scan up (+) or down (-) to a station,
pause for five seconds, and then continue
scanning to the next station. Pressing the local or
remote scan button again will stop the scan
operation.
The scan operation also stops when:
1) the local BAND or MODE buttons are pressed;
or
2) a remote band or search button is pressed; or
3) when it wraps around to the original station, if
that station is scannable; or
4) if the original station is not scannable, after a
maximum of repeat counts.
High/1 (rising edge) = Scan up or down;
Low/0 = No effect
Output: <FM_Scanning>
Indicates that the tuner is busy scanning. The
output will be high for as long as the tuner remains
scanning.
High/1 = Scanning; Low/0 = Not scanning
Input:
<AutoMute/AutoMono_Dis>
Disables the auto-mute and auto-mono features in
the FM tuner when the input is high. When low,
the auto features are enabled.
Auto mode automatically sets the tuner to mono
as the signal strength weakens, and mutes the
audio when the signal strength is weak.
High/1 = Disable auto-mute and auto-mono mode;
Low/0 = Enable auto-mute and auto-mono mode
Inputs:
<FM_Hphone_Vol+>,
<FM_Hphone_Vol->
Increases (+) and decreases (-) the headphone
volume on the rising edge of the signal.
Users can control the headphone volume by
pressing the local up (k) and down (j) buttons
on the C2N-TFM when the unit is in VOL mode, or
from remote buttons defined on a touchpanel or
other interface.
If the input is high for longer than 300
milliseconds, the volume will continue to increase
or decrease until:
1) the input goes low (the local or remote volume
button is released); or
2) after maximum "repeats".
High/1 = Raise/lower volume (volume button
pressed); Low/0 = volume button released
(continued on next page)