Hitachi HTA-DD3E - Adjustments Procedures; FM Discriminator Adjustment; Tuning Level Adjustment

HTA-DD3
 8 
* R22
DC balance meter
1) FM Discriminator
Measuring instrument and condition.
2) Voltage of covering (Reference)
3) Tuning level (dB) adjusment
Input  FM antenna, 1 KHz, 26 dBµV, 75 KHz
Adjust  VR1
Limit  26±2dB
(NOTE) Adjust VRI until "Tuned" Indicator light on.
Input terminal Output terminal Measuring instrument Frequency Adjust Reading
FM antenna * R22 DC balance meter 98.1 MHz T4 0±30mV
1kHz, 60dBu,
22.5kHz dev.
Band Destination Frequency Specification Note
Limit(V) Average(V)
FM E/EBS 87.50MHz 1.3-3.7 2.4
(50kHz step) 108.00MHz 6.0-9.0 7.5
W/WUN/WAU 87.50MHz 1.3-3.7 2.4
(50kHz step) 108.00MHz 6.0-9.0 7.5
AM E/EBS 522kHz 0.9-1.2 1.1
(9kHz step) 1,611kHz 6.0-9.0 7.5
W/WUN/WAU 522kHz 0.9-1.2 1.1
(9kHz step) 1,611kHz 6.0-9.0 7.5
ADJUSTMENTS