Tait T850 II Series, Service Manual

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M850-00
T800 Ancillary Equipment H3
Copyright TEL 31/09/98
T800-04-0000 RSSI
The T800-04 RSSI option PCB plugs directly into the main PCB (support circuitry being
fitted as standard). It is fitted to the T855, T875 and T885 whenever receiver signal
strength monitoring is required, e.g. trunking or voting. Its function is to provide a DC
voltage proportional to the signal level at the receiver input.
Refer to the appropriate service manual.
T800-08-0000 Ancillary Chassis
The T800-08-0000 is a general purpose chassis designed to be mechanically and elec-
tronically compatible with a T800 Series II rack frame. It comprises the following items:
• top and bottom chassis rails
• side panels
• rear panel
• PCB mounting brackets
• double D-range plug assembly (for mounting directly on a PCB)
• T800 Series II blank front panel complete with handle.
Custom designed PCBs for special applications can be mounted in several positions
inside the chassis to provide a convenient, plug-in module that interfaces directly with a
T800 Series II rack frame.
Refer to Application Note AN-RSD-002 for further information.
T800-10-0000 Channel Select PCB
The T800-10-0000 is a small PCB that plugs into the Micromatch connector (SK805) in
the microcontroller compartment of a T800 Series II receiver, exciter or transmitter. It is
fitted with an eight-switch DIP switch which allows the manual selection of any one of
the channels already programmed into the module by PGM800Win. The T800-10-0000
is also fitted with a Micromatch socket to provide access to SK805 for programming pur-
poses.
T800-80 Local Microphone
A 600
Ω
microphone complete with 300mm cord terminated in a ¼" stereo plug.