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4-6-32. REC Current and Frequency
Characteristic Adjustment (50M Rch)
Board
RF EQ (H4)
Specification
Test Point
TP104, TG101, TP2, TG1
Adjustment
Point
Input Signal
INT SIG color bar
Mode
REC
Tape
R/P Tape
M.EQ
Spectrum Analyzer
1. Connect a Spectrum Analyzer to the TP104(H4).
EXT TRIG. : TP2 (H4)
RECALL : REG 1
GND : TG101
2. Insert a R/P Tape and record a color bar signal.
3. Select the item C00 RF ED ADJUST Menu
4. Set the values as follows.
C08 REC FREQ R1 -100
C10 REC FREQ R2 -100
5. Change the item C07 REC CURR R1 and C09
REC CURR R2 until just achieve the saturation
level at 5MHz
The level at 5MHz
The saturation point
REC CURR EVR VALUE
6. Adjust C08 REC FREQ R1 and C10 REC FREQ
R2 so that the level at 20MHz is maximum.
7. Store the signal in the TRACE-B.
8. Adjust following items so that the waveform
becomes TRACE-A of the following figure.
Adjustment items
C07 REC CURR R1 , C09 REC CURR R2
C08 REC FREQ R1 , C10 REC FREQ R2
4.0 ± 0.5dB
TRACE B
TRACE A
5M
9. Add "+110" to the value of C07 REC CURR R1
and C09 REC CURR R2
(Ex. In case of -50 → +60)
13. After adjustment, compare the spectrum of
Master Playback and Confidence Playback
3.0 ± 0.5dB
20M
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