
7700 MultiFrame Manual
7700DA-HD SMPTE292M Re-Clocking Distribution Amplifier
5.1. SELECTING RECLOCK OR NON-RECLOCK MODE
There are two jumpers J8 and J9 that determine whether the module will operate as a reclocking
distribution amplifier with SMPTE 292M (1.5 Gb/s) video signals or as a non-reclocking distribution
amplifier with other data rates.
For the A and B revision of the board:
HD / BYPASSTo select the normal reclocking mode remove both of these jumpers. For convenience you
may re-install the jumper so that only one side is connected.
To select the non-reclocking mode install both of these jumpers.
For the C revision and later of the board:
RCLK/NON-RCLK To select the normal reclocking mode put both of these jumpers in the RCLK
position. To select the non-reclocking mode install both of these jumpers in the NON-RCLK
position.
5.2. SELECTING WHETHER LOCAL FAULTS WILL BE MONITORED
BY THE GLOBAL FRAME STATUS
The FRAME STATUS jumper located at the front of the module determines whether local faults (as shown
by the Local Fault indicator) will be connected to the 7700FR frame's global status bus.
FRAME STATUS To monitor faults on this module with the frame status indicators (on the PS FRAME
STATUS LED's and on the Frame's Fault Tally output) install this jumper in the On position.
On Rev A and B boards install the jumper. (default)
When this jumper is installed in the Off position local faults on this module will not be
monitored. On rev Rev A and B boards remove the jumper and re-install it so that only one
side is connected.
5.3. SETTING THE EQUALIZER WARNING THRESHOLD
The EQ trimpot R28 located near jumper J8 is used to set the threshold of the cable equalizer warning.
The equalizer warning is factory set to 125 meters of Belden 1684 cable, but may be adjusted for other
cable types or cable lengths. To adjust the cable equalizer warning threshold, connect a signal to the
input of the DA using the required length of cable. Adjust the trimpot slowly until the Equalizer warning
LED comes on. You can verify that the equalizer warning is operating correctly by removing a few meters
of cable from the input. The LED should go off.
Revision 1.3
7700DA-HD-5