F - 4 Interfacing non-Tait accessories
11/98 IPN: 449-51000-01
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Table F-1: Accessory connector signal descriptions
Signal
Description
Type
Signal level
Output
impedance
/current
Input
impedance
RX-DET-AF
Unmuted receive audio
Analogue audio
1.15-1.6 VDC
53-225 mV
rms
2.2 k
Ω
–
MOD-AUDIO Modulator input
Analogue audio
0-4.8 V
pp
2.4 VDC
–
470
Ω
+7V5-ACC*
Accessory power
DC supply
7.0 V* nominal
* Dependent on battery charge level.
20 mA (max)
–
RXD
Serial receive data
CMOS
high = 0
low = 1
–
–
TXD
Serial transmit data
CMOS
high = 0
low = 1
1 mA (max)
–
SENSE-0
Accessory sense
(internal speaker disable)
CMOS
high = 1
low = 0
1 mA (max)
–
SENSE-1
Accessory sense
(VOX mode)
CMOS
high = 1
low = 0
1 mA (max)
–
EXT-MIC
External microphone input
(electret)
Analogue audio
11 mV
pp
(typical)
DC coupled
–
1 k
Ω
EXT-PTT
External push-to-talk input
Analogue DC
0-5 V, PTT = 0 V
–
27 k
Ω
EXT-SPKR
External speaker differential output
Analogue audio
±6.5 V
pp
differential
To drive 16
Ω
differentially
–
EXT+SPKR
External speaker differential output
Analogue audio
±6.5 V
pp
differential
To drive 16
Ω
differentially
–
RF
Accessory antenna connection
Radio frequency
Tx: 5 W
rms
(max)
50
Ω
–
Содержание Orca series
Страница 1: ...Tait Orca Handportable Radios Service Manual December 1998 IPN 449 51000 01 ...
Страница 8: ...A 2 Introduction 11 98 IPN 449 51000 01 ...
Страница 16: ...A 10 Introduction 11 98 IPN 449 51000 01 ...
Страница 18: ...B 2 Radio specifications and circuit descriptions 11 98 IPN 449 51000 01 ...
Страница 26: ...C 2 Diagnostics and fault finding 11 98 IPN 449 51000 01 ...
Страница 58: ...D 20 Servicing the radio 11 98 IPN 449 51000 01 ...
Страница 60: ...E 2 Battery packs and chargers 11 98 IPN 449 51000 01 ...
Страница 74: ...F 2 Interfacing non Tait accessories 11 98 IPN 449 51000 01 ...
Страница 82: ...F 10 Interfacing non Tait accessories 11 98 IPN 449 51000 01 ...
Страница 84: ...G 2 Additional information 11 98 IPN 449 51000 01 ...