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参数资料
| 型号： | D1723GF |
| 厂商： | NEC Corp. |
| 英文描述： | PLL FREQUENCY SYNTHESIZER AND CONTROLLER FOR FM/MW/LF TUNER CAR AUDIO |
| 中文描述： | 锁相环频率合成器和控制器的调频/中波/低频调谐器汽车音响 |
| 文件页数： | 35/80页 |
| 文件大小： | 1590K |
| 代理商： | D1723GF |
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35
μ
PD1723GF-013,
μ
PD1723GF-213
Function
Symbol
VF
BAND
VF
BAND
To reset the VF band, press the
The VF band has 6 independent memories. The last channel is also independent.
When the device is set to the tape or CD mode by TPSET or CDSET switch while on the VF
band, it switches to the DK standby mode. The device also switches to the DK standby mode
when the
key is pressed in the tape or CD mode. In the DK standby mode,
all the keys, other than the
key, are valid. When the DK switch is set to ON
in the DK standby mode, the device switches to the DK ON mode. In the DK ON mode, radio
muting (RDMUTE pin) is turned off and audio muting (AMUTE pin) is turned on.
When both the SD and SK signals or one of signals are lost during VF band reception
(including TAPE or CD DK standby mode), BEEP is output.
The SD and SK signals are checked 512 times once every 30 ms and if there are no SD and
SK signals for 256 times or more, BEEP is output.
For BEEP, 120 ms ON and 120 ms OFF are output 5 times, respectively.
key or
key.
Preset memory scan and auto store memory key.
The auto store memory function is enabled when initialize diode DISAMEMO is 0.
When the auto store memory is used (DISAMEMO = 0), when this key is pressed and
released within 2 seconds, preset memory scanning is performed. When this key is held
down for more than 2 seconds, operation switches to auto store memory operation.
When the auto store memory is not used (DISAMEMO = 1), the preset memory scanning
operation starts the moment the button is pressed.
The preset memory scan and auto store memory operations are described below.
(1) Preset memory scan operation
The preset memory contents are called automatically every 5 seconds.
If other than the current preset memory is being received, the preset memories are
called from M1, and if a present memory is being received, the preset memories are called
from the next preset memory (for instance, from M4 if M3 is being received) sequentially
every 5 seconds. This operation is shown below.
Example
When FM1 band being received
FM1
This operation is the same for the MW bands (MW1, MW2) and LW band.
VF
PSCAN
AMEMO
M1
→
M2
→
M3
→
M4
→
M5
→
M6
→
Other than preset
memory being re-
ceived on FM1 band
M3 being received
on FM1 band
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