619 Series Audio Bridge
Audio routing and level adjustments for both inputs and outputs are made from the front panel. Initial setup and maintenance plans are now far easier to implement. A protective cover provides easy access to these points and prevents inadvertent damage.
A LED level meter has been provided to allow simple setup of internal audio levels without the requirement for other test equipment. LED bars are calibrated in 3 dB steps. This meter can also be used as a diagnostic tool to monitor the bridges operation in conjunction with POWER, MUTE and PTT status LEDs.
The mute disable facility allows audio bearer circuits to be mixed, without the requirement of a mute control. This is very useful in circuits without control lines or where control facilities are incompatible i.e. tone / DC keying.
Remote control of the 6 way audio bridge is now possible via a 37 way D connector on the rear panel. This can be controlled from Omnitronics' 9000 Telemetry Series and 9200 Telemetry Series equipment or the 970CD Channel Decoder and the 619 Audio Bridge controller combination using 5 tone SELCAL. A common application is changing from a normal status mode. Particularly useful in shared repeater site.
619 Series Audio Bridges can be coupled together to form larger bridge networks. All audio connections are made through 8 way US MODULAR connectors.
The Audio Bridge is powered form a single 12v DC source and has optional plug pack socket or 2 part screw terminal connections. The 1U 19' subrack housing provides a convenient and minimal profile method of integrating into existing or new systems.
All audio adjustments through front panel.
Led bar graph for setup and diagnostic testing.
4 or 6 independent ports.
Input audio muting facility. Optional control by 'E' (Mute) lead.
All DIP switch path selections via Front Panel access.
Remote control of the 6 way bridge via rear 'D' connector.
Wide input and output ranges.
Supply Voltage: 10 to 16 Vdc
Supply Current: 300mA max.
Power supply rejection ratio:> 80dB
Opto coupled bi-directional: 5 to 30 Vdc
Voltage free contact: 30 Vdc 1A max. (resistive)
Impedance: 600 ohms balanced
Input Level range: -25 to +5dBm
Channel Crosstalk: Better than - 63dB
Common mode reject ratio: Better than 60dB
Remote control port (619EI only)
37 way D connector
Impedance: 600 ohms
Output Level Range: -25 to +0dBm into 600 ohms
Frequency Response: 300 - 3Hz (+/- 1dB ref 1KHz)
Diagnostic LEDs: 1 x Level Meter 1 x Power LED 4 /6 x Mute inputs
Dimensions: (H x W x D): 44mm x 19" x 255mm (1RU)
Operating Temperature:0 to 60 deg. C
Relative Humidity:0 to 95% non condensing