21
Connectors, Indicators, Controls, and Jumpers
Description, Specifications, SS Software, and Operation Manual
Federal Signal
www.fedsig.com
Figure 5 Balanced Interface Connections (TB2)
GND
CAR DET
RX AUD LO
RX AUD HI
TX AUD LO
TX AUD HI
LOC TX AUD
PTTNC
PTTNO
PTTCOM
GROUND
TB2
CARRIER DET
PTT
BALANCED TX AUD
BALANCED RX AUD
DE-EMPHASIZED/MUTED
10
9
8
7
6
5
4
3
2
1
TRANSMIT AUDIO
FROM OTHER
EQUIPMENT
TRANSCEIVER
INTERFACE
Setting the Jumpers
Use the following tables to set the jumpers.
Table 8 Jumpers
Internal Jumpers
JU1
Internal - DTMF Decode Speed, Jumpered = 35 ms/5 ms,
Open = 50 ms/50 ms or greater. The default is open.
JU3
Internal - External Mic Amplified or not Jumpered for amplified mics.
The default is open.
JU5
Internal - Ghost Power to balanced Mic Input, Jumpered a46 Vdc.
The default is open.
External Jumpers
JU4A Receive Audio Input Impedance
Center and Upper pins Jumpered = 10 kΩ
Center and Lower pins Jumpered = 600 Ω (typical)
JU4B Transmit Audio Output Impedance
Center and Upper pins Jumpered = 10 kΩ
Center and Lower pins Jumpered = 600 Ω (typical)
Usually Low Z (600 Ω) will drive any type of input.
JU4C Carrier Detect Polarity
Center and Upper pins Jumpered = Active High
Center and Lower pins Jumpered = Active Low (typical)
JU4D Carrier Detect or VOX
Center and Upper pins Jumpered = VOX
Center and Lower pins Jumpered = Carrier Detect Input (typical)