Tait TM8000 Series Applications Manual page 34

Table 2.20 Control-head connector - DC characteristics (continued)
Standard
Parameter
min.
Analogue signals (for signals not listed here refer to the Auxiliary interface specification)
DC input range:
VOL_WIP_DC 0
0
DC bias:
SPK+/–
CH_MIC_AUD 2.9
Input resistance:
CH_MIC_AUD 2.1
Output resistance:
SPK+/–
Output load:
+3V3
+13V8
Safe DC input limits:
VOL_WIP_DC –7
RX_AUD –17
SPK+/– 0
CH_MIC_AUD –17
Table 2.21 Control-head connector - AC characteristics
Parameter
RX_AUD
CH_MIC_AUD
SPK+/–
Table 2.22 Control-head connector - speaker output characteristics
Standard
Parameter
min.
Mute ratio 70
Receive audio Refer to plot in
frequency response
Internal speaker output:
Load configuration Balanced
Load 12.8
Maximum power 3
Rated duty cycle
Concurrent speaker
output:
Rated duty cycle
34 Description of the Radio Interfaces
typ. max. units
0.6 V
10 kΩ
0.5Vs V
3.1 V
2.2 2.3 kΩ
Ω
0.5
100 mA
1 A
+17 V
+7 V
+17 V
+17 V
Standard
min. typ. max. units
refer to Table 2.16
refer to AUX_MIC_AUD in
Table 2.7
refer to Table 2.22
typ. max. units
75 dB
Table 2.24.
Ω
16 19.2
W
100 %
33 %
Test method and
conditions
Voltage/resistance for min/
max volume respectively.
Audio PA on.
Via 2.2kΩ
Audio PA on.
Test method and
conditions
Test method and conditions
With respect to maximum
output power. Noise measured in
0.3-3kHz bandwidth.
EIA-603B
At 1kHz.
Into 16Ω.
At maximum power.
1min at maximum power
2min Rx standby
TM8000 3DK Hardware Developer's Kit Application Manual
Comments
This line is used for control-head
detection. An open-circuit input
is considered as no head fitted.
Bias for electret microphone.
Specification must be derated by
load amount from internal
options and auxiliary interfaces.
Short circuit-safe.
Comments
Comments
Signal path muted. Audio PA
on.
The internal and external
speaker loads are connected
in parallel (not switched).
September 2003 © Tait Electronics Ltd