Tait T2000 II Series Service Manual page 98

5.18 Fault Finding
Pin
Connection
No.
BUSY S14-3
RX-GATE S14-4
/PTT-TO-OPT S14-5
/PTT-FRM-OPT S14-6
/IN-LOCK S14-7
MIC-MUTE S14-8
/SIG-SQLCH S14-9
/EMERGNCY S14-10
CALL-SW S14-11
HUSH S14-12
AUX-ON/OFF S14-13
HORN S14-14
RSSI S14-15
EXTERNAL S14-16
BCD0 S15-9
BCD1 S15-10
BCD2 S15-11
BCD3 S15-12
BCD4 S15-13
BCD5 S15-13
* Refer to BCD selection table.
Table 5.5 Options Connectors - Logic Signal Specifications
The following table shows the BCD codes for T2010 and T2015 radios under external
channel control.
Note:
T2010 has 4 channels accessible by BCD and T2015 has 24 channels accessible by
BCD
BCD Channel Number Codes
BCD-5 BCD-4
0 0
0 0
0 0
0 0
0 0
0 0
31/10/96
Function
carrier detect
opening time: <35ms
closing time: <20ms
(8dB sinad, 6dB margin)
Rx audio gate information
from mic.; linked to 18
Tx
synthesiser lock detect
(lock-up time: <20ms)
disables AF from mic. only
Rx audio gate control
starts s/w sequence
front panel control
car radio mute output
front panel control
Selcall horn alert
Rx signal strength
line to power plug
channel change option
*
on T201X
BCD-3 BCD-2
0 0
0 0
0 0
0 0
0 1
0 1
Logic Logic
Levels Sense
0V 5V 0V = busy
5V CMOS 5V = audio
pull-up 0V = Tx
5V CMOS 0V = Tx
0V 5V 0V = lock
5V CMOS 5V = mute
open c. 0V = AF muted
open c. 0V = emergency
5V CMOS
5V CMOS
5V CMOS
5V CMOS
0 - 50µA 0.8µA/dB
0 - 5V CMOS 0V = 0
5V = 1
BCD-1 BCD-0
0 0
0 1
1 0
1 1
0 0
0 1
M2000-00
Sink Source
Z
in
I I
max max
0.5mA 0.1mA
1.5mA 0.3mA
1.5mA 50µA 2k7
CMOS
0.2mA 0.2mA
200k
47k
10k
1.5mA 0.3mA
1.5mA 0.3mA
1.5mA 0.3mA
1.5mA 0.3mA
10k
BCD Channel
Number Number
0 1
1 2
2 3
3 4
4 5
5 6
Copyright TEL