Installation Manual

23
Table 2 – Radio Option Connector P3 Interface Description
DB-25
PIN
NO
(J100)
PIN
NO
(P3)
I/O DESCRIPTION
2 1 ---
Ground:
 Audio Ground
52I
Internal Speaker Input #1:
 5W across Internal Speaker
63O
Audio Amp Output #1:
 Vo
≈
6.6 VDC
18 4 O
Audio Amp Output #2
to Internal or External Speaker
 Vo
≈
6.6 VDC; 10W maximum across External Speaker
19 5 I
External Mic Input:
 300-3000 Hz
 Input level @ 1kHz for 60% of RSD: 82
±
28 mV
RMS
(if external audio source has Ro=600
Ω
)
 Input level @ 1kHz for 60% of RSD: 41
±
14 m V
RMS
(if external audio source has Ro<1
Ω
)
76I
External Mod Input:
 5-10,000 Hz (3 db BW)
 Modulation-Sensitivity: 4.2 kHz/Vrms ± 3dB
20 7 O
Switched DC Output:
 Icc=500 mA Max
88I
Push To Talk:
 TX ON: Low
 TX OFF: Open
21 9 I
Mic Hookswitch:
 “Disable” or “Enable” is selected by PC Programmer
 Hookswitch ON: Low
 Hookswitch OFF: Open
910O
Rx Discriminator Detect Audio:
 20-4,000 Hz (3 dB Bandwidth)
 75 m V
RMS
±3 dB into a 10K ohm load
22 11 ---
Ground
10 12 I
Internal Mic Mute:
 Mute ON: Low
 Mute OFF: Open
23 13 O
Radio UnSquelch:
 Squelch Open: Low
 Squelch Close: High
 RL = 4.7 kohms
11 14
Spare