Panasonic RS-612US-D - Overall Performance Measurements

ITEM
Overall gain
Equipment:
* AF oscillator
*VTVM
* ATT
* Oscilloscope
* Test tape
(reference blank tape)
C-RA for Normal
Level meter
Equipment :
* VTVM
* Oscilloscope
* AF oscillator
* ATT
Overall distortion
Equipment :
* Distortion meter
* AF oscillator
* ATT
* Oscilloscope
* Test tape
(reference blank tape)
C-RA for Normal
C-RF for CrO2
MEASUREMENT & ADJUSTMENT
1. Test equipment connection is shown in fig. 15.
Record mode
LINE IN
AF oscillator
Test tape
R/P head
Playback mode VTVM Oscilloscope
Test tape
Fig. 15
. Place UNIT into record mode, and equalizer selector to 1204S, bias
selector to LOW (for normal tape).
. Supply 1 kHz signal (~24dB) from AF oscillator, through ATT, to
LINE IN.
. Adjust ATT until monitor level at LINE OUT becomes 0.42 V (—7 dB).
. Using test tape (C-RA), make recording.
Playback recorded tape, and make sure the value at LINE OUT on
VTVM becomes 0.42 V.
. {f measured value is not 0.42 V, adjust VR5 (L-CH), VR6 (R-CH) (See
Ww
fig. 20 on page 12).
. Repeat from step (2).
Supply 1kHz signal (—24dB) from AF oscillator, through ATT, to
LINE IN jack.
Place UNIT into record mode.
Adjust ATT until monitor level at LINE OUT becomes 0.42 V.
Short or open the connection point (D) and (E) so that VU meter indi-
cates 0+ 1 VU (See fig. 19 on page 12).
REMARKS
* Record/playback mode
* Record level control
ws MAX
+ Input selector---LINE IN
* Standard input level:
MIC «+--+. —72+3dB
LINE IN —24+3dB
—36+3dB
+ Record mode
. Test equipment connection is shown in fig. 16.
LINE IN
R/P head
~ att 6000 Record
mode — Test tape
Playback mode =
Distortion
meter
Fig. 16
Test tape
. Supply 1 kHz signal to LINE IN and adjust ATT so that output level
at LINE OUT indicates 0.42 V (— 7 dB).
. Make recording.
. Playback and measure distortion factor of output signal.
* Record level control
ws MAX
* Input selector::-LINE IN