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If you are concerned about frequency error please follow the procedure below.
Wait until the frequency stabilizes for a while after turning on the power supply.
When this adjustment is made, the oscillation frequency changes, so it is necessary to adjust the
crystal filter center frequency again.
７
-
２
. Frequency adjustment 1
■
When using a precise oscillator or broadcast (Radio Nikkei for example)
1. Measure the deviation (ppm) of the reception frequency by receiving the
oscillator or the broadcast.
Deviation(ppm) = frequency deviation
÷
reception frequency x 1000000.
The right photo shows receiving the radio Nikkei (3945 kHz) , adjusted the
reception frequency so that CARRIER F = 0.
Since it became almost 0 at 3944958 Hz (-42 Hz),
Deviation(ppm) = -42
÷
3945000 x 1000000 = - 10.6 ppm
⇒
- 11 ppm.
2. Press and hold SW1 and enter "Setting" from the "function selection menu".
3. While "1. Freq Adj" is selected, turn RE2 and input the deviation (-11 in
the above example) measured with 1.
4. Press and hold SW1 to return to the "function selection menu" screen
and the setting is written to Flash.
Radio NIKKEI 1
︓
3.925MHz
、
6.055MHz
、
9.595MHz
Radio NIKKEI 2
︓
3.945MHz
、
6.115MHz
、
9.760MHz
Setting
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