FRONT PANEL CONTROLS
1. POWER ON/OFF
POWER switches the tuner on or off. Pressing the Power switch
turns the Tuner on, the Display Panel and Power Status Indicator
(No. 2) will light up. Pressing the Power button again will switch
the unit off.
NOTES: The C420 has a receiver for remote control commands
built-in. Most NAD system remote control handsets with an On/Off
toggle button or separate On and Off button will be able to switch
the tuner from On to Stand-by and vice-versa.
The C420 uses a memory back-up system to store Preset
information. This information is retained for several weeks, even
if the unit is switched off completely or unplugged. When
switching power On, the C420 will go back to the station last tuned
to before the unit was turned off. This will allow you to make timer
recordings using an external timer and recorder.
2. POWER STATUS INDICATOR
The Power Status Indicator will light up green when Power is on.
When the tuner is switched to Stand-by mode (through either a
remote control or the 12V trigger input) the indicator will light up
amber. When the unit is switched off completely, it is off.
3. BLEND
Weak or remote stereo radio stations are sometimes received with
noise and hiss as the antenna signal is too weak. By switching the
tuner to mono will reduce the amount of noise and hiss but at the
expense of any stereo information. The NAD Blend feature will
allow you to reduce the amount noise and hiss but still retain
some level of stereo separation, instead of mono. The Blend
button toggles between engaging or disengaging the Blend feature;
when engaged, “BLEND” lights up in the display.
NOTE: The “Blend” status can be stored for individual presets.
Refer to the separate chapter “Storing, Recalling and Labelling
Presets” for more information.
4. MEMORY
The Memory is used to store stations into the Preset Memory bank
and to store user defined names for non-RDS Preset stations.
When Memory is pressed during normal operation, the Preset
number and the red “MEMORY” indicator will flash in the Display
Panel. If no other buttons are pressed within 12 seconds, the
tuner will revert to its previous state. Refer to the separate chapter
“Storing, Recalling and Labelling Presets” for more information.
5. FM MUTE/MODE
This button combines two functions; it switches the tuner from
Stereo to Mono and disengages the muting circuitry at the same
time. The muting circuit will mute the tuner in between radio
stations when searching or tuning. This way the tuning noise is
avoided. The muting circuit however may suppress very weak
radio station signals. If a weak station is in stereo it will have a
high level of background hiss. Switching to Mono Mode and
disengaging the muting circuit by depressing the FM MUTE/MODE
button will allow the station to be heard and will cancel most or
all of this background noise.
In normal operation the mute circuit is engaged, the display
indicates “FM MUTE”. Press the FM Mute/Mode button to
disengage the muting circuit and switch from stereo to mono
reception. “FM MUTE” in the display will extinguish. Press the FM
Mute/Mode switch again to return to Auto Stereo FM operation.
NOTE: The “FM Mute/Mode” status can be stored for individual
presets. Refer to the separate chapter “Storing, Recalling and
Labelling Presets” for more information.
6. AM/FM
The AM/FM button switches the tuner from the AM band to the FM
band and vice-versa. The Display Panel shows the frequency of the
tuned station and which band is selected. The FM tuning is in 0.05
MHz increments, AM tuning is in 9 kHz or 10 kHz increments,
depending on the version.
7. DISPLAY
With stations carrying RDS information, The Display button scrolls
between three different display modes, each successive push of
the button engages the next one of the three modes:
a) In the default mode, the station’s RDS name is displayed,
Program Service (PS; normally the station’s calling letters, BBC
R3, for instance).
b) From the default mode, press the button once to view Radio
Text (RT). This can be additional information such as the
presenter’s or program’s name; what song is playing, etc. This
text scrolls continuously over the 8 alphanumeric display
segments.
c) Press the button from the display RT mode to display the station
frequency. Press again to return to the default mode (a).
When tuned to a non-RDS station
The Display button toggles the display to show either the station
frequency or user entered station name. If no user name was
entered the display will indicate “NO RDS”. The Display button is
also used to label non-RDS stations with a name. Refer to the
separate chapter “Storing, Recalling and Labelling Presets” for
more information.
8. PRESET/TUNE
The Search/Preset button toggles between two different modes:
a) Preset mode: In this mode you can use the Tune/Preset button
(No. 10) to select a Preset. When Preset Mode is selected
“PRESET” will scroll once through the display and the PRESET
indicator lights up in the display.
b) Tune mode: By pressing the Tune/Preset button (10) or
you can engage automatic or manual tuning respectively
down or up the frequency band. When Tune mode is selected,
“TUNE” will scroll through the display once.
9. DISPLAY AREA
The display area gives all vital information on the status of the
tuner. Displayed are:
• Band and frequency of current station, RDS PS (station name),
or RDS Radio Text. The latter two only if RDS is available; select
using the Display button (No. 7).
• If an FM Stereo broadcast is received.
• If the FM station also broadcasts RDS.
• If “Memory” has been engaged
• Preset number if the current station is stored in the tuner’s
memory bank.
• If Blend and FM Mute/Mode are switched On.
• Radio Signal Strength. The bars just below “ANTENNA” indicate
the radio station’s signal strength. The more bars are lit, the
stronger the station.
NOTE: The infrared sensor, which receives commands from a
remote control (not supplied), is located on the left side of the
display window. There must be a clear line-of-sight path from the
remote control to this window; if that path is obstructed, the
remote control may not work.
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