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IC-746 FAQ
8.4
What are the pin-outs on the ACC-1 connector?
Page 72 of the Instruction Manual has the full scoop. Here is a brief description.
1 RTTY
High
> 2.4 V dc
Low
< 0.8 V dc
Current
< 2 ma
2 GND
3 HSEND Input/Output for HF-6m
When grounded, transmits
Goes to ground when transmitting
Ground level:
-0.5 to 0.8 V dc
Output current:
< 20 ma
Input current:
< 200 ma
4 MOD
Audio input - direct to modulator
Bypasses microphone preamp and VOX
100 mV rms at 10,000 ohms
5 AF
Audio output - fixed level
Also monitor output when transmitting
100-300 mV rms at 4,700 ohms
6 SQLS
Goes to ground when squelch opens
Current:
0.1
ma
7 13.8 V
Unregulated connection to main supply voltage
Max Current:
1 amp
8 ALC
Automatic Level Control
0 to -4 V dc yields 0 to 100 w RF output
Page 91 of 113
2003-02-08