
40
Base Station Specifications
TB9300 Specifications Manual
© Tait International Limited August 2022
1.8.5
Audio Delay
Transmit direction:
70 ms max (signal applied to a balanced input)
Receive direction:
70 ms max (signal sampled on a balanced output)
Delay distortion:
≤
40
µ
spp
300 Hz to 3 kHz (relative to 1 kHz)
Delay distortion is the pulse distortion that arises because different fre-
quency components have different delays.
1.8.6
Rx Gate Output
The Rx gate output indicates a valid analog received signal.
Logic state:
Active low
Logic type:
Open drain transistor connection
The Rx Gate output is not the same as an M-wire output:
Large negative voltages (traditionally associated with E&M signaling)
can damage the reciter hardware when applied directly.
Tait offers an isolation adapter that provides E&M isolated signaling
(order number TBC101A).
Electrical Characteristics
Parameter
Specification
Comments
Low voltage level
<0.4 V
Rx gate activated
High voltage level
0 to 30 V
Protection
Low level output current
<250 mA
High level output current
<100 µA at 30 V