Rf Adjust Mode (A1) - Sony DNW-A75 Maintenance Manual

4-2. TAPE Maintenance Mode (M0)

4-2-9. RF ADJUST Mode (A1)

4-2-9. RF ADJUST Mode (A1)
The A1 : RF ADJUST mode is used to adjust the RF
system.
Eight menus are available.
A1 : RF ADJUST
A11 : EQUALIZER
A12 : REC CURRENT
A13 : PLAY PLL
A14 : FWD PLL
A15 : REV PLL
A16 : A/D GAIN
A17 : A11-A16 ALL ADJUST
A1F : NV-RAM CONTROL
Menu Tree of RF System Adjustment Mode
n
If abnormally exists in the servo system, each menu in A1 :
RF ADJUST mode does not function properly.
4-58
A11 : EQUALIZER
A12 : REC CURRENT
A13 : PLAY PLL
A14 : FWD PLL
A15 : REV PLL
A16 : A/D GAIN
These menus are used to perform the automatic adjust-
ments below.
A11 : EQUALIZER
This menu automatically adjusts the PB RF levels (VC)
and PB equalizers' gain (EQ) and phase (PH) for the PB
heads (channels A1, A2, A5, A6, B1, B2, B5, B6, CNFA,
and CNFB).
A12 : REC CURRENT
This menu automatically adjusts the recording current
levels for the REC heads (channels A and B).
A13 : PLAY PLL
This menu automatically adjusts the VCO free-running
frequency in a PB PLL circuit for PLAY mode.
A14 : FWD PLL
This menu automatically adjusts the VCO free-running
frequency in a PB PLL circuit for F FWD mode.
A15 : REV PLL
This menu automatically adjusts the VCO free-running
frequency in a PB PLL circuit for REV mode.
A16 : A/D GAIN
This menu automatically adjusts the gain in converting a
PB RF signal from analog to digital.
DNW-A75/A75P