(5) REMOTE (N.O. N.C.)
These RCA type jacks may be used for control of peripheral equipment such as tape recorders, etc. When the TIMER switch is activated, and the ON time is reached, the internal switching relay is activated. When the OFF time is reached, the relay returns to its normal condition. The normally open and normally closed jacks on the rear panel may then be used, according to the control requirements of your station equipment. See the "Operation" section for details.
 
(6) AC VOLTAGE SELECTOR
This is for selection of the proper input AC voltage. Set this selector for your local line voltage. If you have any question about your local line voltage, consult your local Yeasu dealer before attempting operation of this equipment.
 
(7) ACC
This is a 5 pin DIN accessory jack which affords access to AGC voltage, an 11 volt DC line, and the mute line.
 
(8) EXT SP
An external speaker may be connected via this jack. The audio output impedance is 4-16 ohms. Insertion of a plug into this jack automatically cuts off the internal speaker.
 
(9) SW/BC, BC, E, MUTE
SW/BC is for connection to a long wire antenna for both shortwave and broadcast listening
BC is for connection to a long wire broadcast band listening.
E is a ground connection.
MUTE provides a means of muting the FRG 7700 (an external standby switch). Shorting the MUTE terminal to ground will mute the receiver.
 
 


SINPO CODE

  Signal
Strangth  
Degrading Effect of
Interference Noise Propagation
Disturbance
Overall
Rating
S I N P O
5 Excellent
* (60dB)
Nil
* (-40dB)
Nil
o (-40dB)
Nil
@ (0dB)
Excellent
4 Good
(45dB)
Slight
(-30dB)
Slight
(-30dB)
Slight
(10dB)
Good
3 Fair
(30dB)
Moderate
(-20dB)
Moderate
(-20dB)
Moderate
(20dB)
Fair
2 Poor
(15dB)
Severe
(-10dB)
Severe
(-10dB)
Severe
(300dB)
Poor
1 Barely
Audible
(0dB)
Extreme
(0dB)
Extreme
(0dB)
Extreme
(40dB)
Unusable
* Receiver Input Level
o Ratio to Signal
@ Depth of Fading, Echo, Etc.
Table 1