| Pin | Name | Description |
|---|---|---|
| 1 | Vcc | Positive Supply Voltage |
| 2 | A | Display Segment A |
| 3 | B | Display Segment B |
| 4 | C | Display Segment C |
| 5 | D | Display Segment D |
| 6 | E | Display Segment E |
| 7 | F | Display Segment F |
| 8 | G | Display Segment G |
| 9 | GND | Ground |
| 10 | RO | Referency Oscillator Output |
| 11 | RI | Referency Oscillator Input |
| 12 | GND | Ground |
| 13 | F in | VCO Frequency Input |
| 14 | Vcc | Positive Supply Voltage |
| 15 | AO | Loop filter Amplifier Output |
| 16 | AI | Loop filter Amplifier Input |
| 17 | PD | Phase Detector Output |
| 18 | LD | Loop Detect - Unlocked=LOW Locked=HIGH |
| 19 | T/R | Transmit=LOW Receive=HIGH |
| 20 | CH19 | Channel 19 |
| 21 | CH9 | Channel 9 |
| 22 | DOWN | Channel DOWN |
| 23 | UP | Channel UP |
| 24 | GND | Ground |
This counter shows the number of hits since the 29th January 2000
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