Rf Level Simplified Diagnosis (Subscreen1) - Sony RDR-GX350 Service Manual

6-2-4. RF Level Simplified Diagnosis (Subscreen1)

1) Turn of the main power ON.
2) On the screen after exiting all menu screens, press "ESC" on the service remote controller.
3) Press "DISP".
4) Press "DIG/ANA".
---- VERSION : 1.**
SYSCON : RELEASE_***
Rev
TUNERCON : 198.000
DRIVE : DVD-RW DVR-L11X
1.00
HDD : WDC WD1600BB-xxGUCx 160
DEVICE : E2R-FE
REGION : 2
Input CH : ** ch
Freq Diff : Low 1
AGC Volt : **** mV
*1) Frequency Difference (Freg Diff)
How much tuning is off is monitored, as shown below:
Input Frequency
Faraway
High
(within 200kHz)
Just Tune
within
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
(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 dBµ or more (AGC Volt 4400 mV or less).
For accurate measurement, use a field intensity meter.
5) Press "ESC". (Returns to the original screen)
:1.******
OK
OK
OK
FLASH : 64M
C : ************
Display
High 7
High 1-5
Center
Low 1-5
Low 7
* The RF signal status can be obtained from the input frequency
deviation information and the AGC voltage.
Input channel
*
Input frequency difference 1)
AGC voltage *
2)
Field Intensity
70 dBµ or more
50 dBµ or more
70 dBµ or less
30 dBµ or more
50 dBµ of less
30 dBµ or less
6-5
RDR-GX350/HX750/HX950
AGC Volt
3100 mV or less
3100 – 4400mV
4400 mV or more
(It is unable to discriminate
under the weak field area.)
4400 mV or more
(It is unable to discriminate.)