
7700/7800 MultiFrame Manual
7807LT-2 Dual Wideband RF Fiber Transmitter
Revision 1.2 Page - 1
1. OVERVIEW
The 7807LT-2 is a dual fiber optic transmitter for RF signals in the extended L-Band frequency range and
below, for frequencies such as over-the-air DTV. It accepts two RF inputs from coaxial cable and provides
two outputs for optical transmission. An RF monitor output is provided for each input, which offers a
convenient means of obtaining peak satellite signal strength, or additional signal distribution. With two
optical transmitters per single-slot card, the 7807LT-2 provides an economical, high density solution.
Individual monitoring and control is provided for each signal path. Gain may be adjusted manually or
managed automatically via AGC. With SmartMON™, incoming RF signal strength, LNB current, and other
data are relayed over the fiber output for monitoring through SNMP/VistaLINK®at the fiber receiver
(requires SmartMON™ capable companion fiber receiver). LNB power with selectable 13/18V DC and 22
kHz tone is also provided on each RF input.
Features:
•Extended frequency response for extended L-Band, off-air DTV and other signals
•Protocol independent design - transports all modulation formats
•LNB power with selectable 13/18V DC, per input
•LNB current limit & short circuit protection
•LNB current monitoring for advance warning of LNB failure
•22kHz tone on/off for LNB local oscillator control, per input
•RF monitoring output ports for signal peaking and signal distribution
•Manual gain and AGC modes for tuning optimal CNR performance
•Multiple versions of the 7807LT-2 are available to address single-mode/multi-mode fiber, single/dual
fiber and CWDM/DWDM applications.
•The 7807LT13/15-2-W is a dual channel card that features and on-board fiber coupler, requiring only
a single fiber for the link (companion receiver is the 7807LR-2-W)
•Dual fiber transmitters on a single-slot card provides the industry’s highest density solution
•SmartMON™ capability provides remote status monitoring via SNMP without a separate data
connection
•VistaLINK® capability is available for monitoring and control when modules are used in a 3RU
7800FR frame and a 7700FC VistaLINK® frame controller is installed in slot 1 of the frame
•Form-C dry contact GPO alarm contacts for monitoring
•Fiber link provides electrical isolation between antenna and facility, mitigating ground loop and
lightning issues
•Compatible with all 2406LR, 7706LR, 7708LR and 7807LR-2 series receivers