
676T / 676R Quick Start Guide 
This guide helps you install and use your 676T / 676R for the rst time.  
Go to www.kramerav.com/downloads/676T or www.kramerav.com/downloads/676R to download the latest 
user manual and check if rmware upgrades are available. 
Step 1:  Check what’s in the b  ox
676T HDMI Optical Transmitter   or  
676R HDMI Optical Receiver 
1 OSP-MM1 Fiber Optic SFP+ Transceiver 
Step 2:  Get to know your 676T and 676R 
676T can be connected to a single 676R device or to multiple devices via optical splitters. When multiple devices are connected,  a 
receiver device is dened as primary when its Tx (SFP+ OUT) optical ber is connected directly to the 676T Rx optical fiber (SFP+ IN). 
Lights green when a connected source device (with an active HDMI  signal) is detected. ™
Flashes 4 times green when resetting the device. 
O when   active signal is detected on the connected HDMI source device. no
Lights green when an HDMI acceptor device (with an active HDMI signal)   detected. is
O when no active signal is detected on the connected acceptor. 
Lights green when OUT IN SFP+ is connected, and an active Tx optical link is detected. 
Lights red when OUT IN SFP+ is connected, and a fault is detected on the single/primary 
676R receiving optical link. 
O when the OUT IN SFP+ is disconnected. 
Lights green when OUT IN SFP+ is connected, and an active   optical link is detected. Rx
Lights red when OUT IN SFP+ is connected, and a fault is detected on the incoming optical 
O when OUT IN SFP+ is disconnected. 
Lights green when the device receives power. 
Connect to an HDMI source. 
RS-  (Tx, Tr, G) 3-pin 232
Connect to a serial controller to communicate serial  with all the connected receivers.  ly
  Receives  -232 communication only from a single/primary receiver. RS
Connect the ber optic cable to the plugged-  SFP+ optical module connectors.  in
Sets the device behavior. 
Press and hold for 5 seconds or less to reset the device. 
Press and hold for over 5 seconds to reset the device to factory default values. 
Connect to a PC to perform rmware upgrade (via K-Upload). 
12V DC connector for powering the unit.