AVALON RF, INC.
Page 4
OTX627 Series User’s Guide & Operating Manual
1.1 Video.
Depending on the model, the unit features either 1 or 2 video inputs.
The video inputs are standard 75 ohm impedance and accept
composite video with negative sync tips.
In case of dual video inputs, the switchover between Video A & Video
B can be made via a serial mode command.
1.2 Audio.
The audio interface is stereo. Both left & right channels are balanced
line level inputs. The input impedance is high – 100K.
1.3 Meta Data.
The transmitter also carries digital meta data with the video. The
standard baud rate is 38.4K with a 8N1 format.
1.4 Talk Back Audio Channel (optional).
The talk back audio channel allows the transmit side (e.g camera
operator on the transmit side) to receive instructions from the
operator at the receiver’s side. It drives an earpiece or the output can
be used with a PA system.
1.4 Two Way Wireless Digital Link (WDL) (optional).
The WDL serves as a Pan-Tilt-Zoom (PTZ) / general-purpose two-
way RS422/RS485 digital link.
1.5 RF Outputs.
The transmitters have two RF outputs (Only 1 for a standard unit,
without WDL or Talk Back Audio Option). A female SMA connector
for the main transmitter and a BNC for the WDL.
Both outputs feed antennas, either directly or through a cable.
