Pioneer DVR-560H-S Service Manual page 187

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3.1 VERSION INFORMATION, ETC. (FIRST SCREEN)
[1] Simple Diagnosis of the RF Level (Subscreen 1)
A
To check the RF signal of the U/V tuner by checking the input frequency difference and AGC voltage
[Purposes]
in this debug mode
[How to enter]
While the User Setting display is displayed, press the ESC , DISP , then DIG/ANA keys, in that order.
[How to quit]
Press the ESC key.
[Description]
DVR-660H/WPW
B
TUNERCON : 2.22
PIC SERIAL : 007710217064
C
Subscreen 1
1) Frequency Difference (Freq Diff)
How much tuning is off is monitored, as shown below:
Input Frequency
Faraway
High
(within 200kHz)
Just Tune
within
D
200kHz
Low
over
200kHz
2) AGC voltage (AGC Volt)
The gain controlled by the tuner is monitored to infer the input electric field intensity.
(The accuracy of inference differs depending on the product.)
Intense field area
(Clear image)
Less intense field area
E
(Noise may be generated.)
Weak field area
(Much noise. EPG/VPS/PDC sometimes cannot be
obtained.)
Very weak field area
(Image damaged. EPG/VPS/PDC cannot be obtained.)
Tips:For good reception, the field intensity must be 50 dB or more (AGC Volt 4400 mV or less).
For accurate measurement, use a field intensity meter.
F
12
1
2
VERSION : 0.14
SYSCON : RELEASE_179
Rev.1.7379
DRIVE : DVD-RW DVR-U13
1.10
HDD INT : ----
GNDB B : NOBKUP GNDB U : NOBKUP
DEVICE : E2R-FEx1.1 FLASH : 128M
REGION : 2 C : 0000000153
: ∗∗ ch
Input CH
Freq Diff : Low 1
: ∗∗∗∗ mV
AGC Volt
Display
High 7
High 1~5
Center
Low 1~5
Low 7
2
3
OK
OK
OK
Input channel
Input frequency difference
AGC voltage
Field Intensity
70 dB or more
50 dB or more
70 dB or less
4400 mV or more
30 dB or more
(It is unable to discriminate
50 dB or less
4400 mV or more
30 dB or less
(It is unable to discriminate.)
DVR-660H-K
3
4
AGC VOL
3100 mV or less
3100 - 4400mV
under the weak field area.)
4