– 86 –
Pin No. Pin Name I/O Function
34 SPEANA-1 I
Spectrum analyzer drive signal input from the spectrum analyzer band-pass filter (IC603)
(for low frequency)
35 SPEANA-2 I
Spectrum analyzer drive signal input from the spectrum analyzer band-pass filter (IC603)
(for low and middle frequency)
36 SPEANA-3 I
Spectrum analyzer drive signal input from the spectrum analyzer band-pass filter (IC603)
(for middle and high frequency)
37 SPEANA-4 I
Spectrum analyzer drive signal input from the spectrum analyzer band-pass filter (IC603)
(for high frequency)
38 VASS —
Ground terminal
39 VAREF I
Reference voltage (+5V) input terminal (for A/D conversion)
40 VDD —
Power supply terminal (+5V)
41 to 53 GR1 to GR13 O
Grid drive signal output to the fluorescent indicator tube (FL601)
54 to 69
SEG1 to SEG16
O
Segment drive signal output to the fluorescent indicator tube (FL601)
70 to 72
SEG19 to SEG17
O
Segment drive signal output to the fluorescent indicator tube (FL601)
73 to 77
SEG24 to SEG20
O
Segment drive signal output to the fluorescent indicator tube (FL601)
78 VKK —
Power supply terminal (–30V) (for fluorescent indicator tube drive)
79 LED1 O
LED drive signal output terminal (r REC, P PAUSE)
80 LED2 O
LED drive signal output terminal Not used (open)
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