Instruction Manual, HD-3500 Series
7
REV F, April 1, 2015
Data and GPIO Transport
As introduced earlier, this link includes three bi-directional asynchronous data
channels. These channels can be set with RS232 or RS422 levels by setting a switch, see
table 7 for the selections in the RX side. These selections are independent from those in the
TX side of the link allowing translation between RS-232 and RS-422 devices if needed. As in
the TX side, we have the same four GPIO bidirectional channels and, a Tally with a front
indicator in the RX side. Read the TX section of this manual for more information on GPIO.
Sw 1
Position
Function
Setting (Default values in Bold)
1
Data 1 Type
on=RS232
off=RS422
2
Data 2 Type
on=RS232
off=RS422
3
Data 3 Type
on=RS232
off=RS422
4
TBD
-
-
POWER REQUIREMENTS
The HD-3500 Series operates from 110 or 220 VAC with the included wall-mount 12V
power supply or other source in a range from 9 to 24 VDC and at least 25W of power. It uses
a coaxial type connector (sleeve ground) on the rear panel labeled POWER. If desired, the
units can be powered from a battery pack or automotive battery instead of the wall unit.
INSTALLATION
The installation and start up of the HD-3500 Series does not have special
requirements. No special sequence must be followed to connect and start up the unit. RG59
or other 75 Ohms Coax cable must be used for the SDI inputs and outputs, and single mode
fiber with the proper connectors must be used for the fiber link. Multimode fiber cannot be
used reliably with the HD-3500. The HD-3500 Series come standard as stand-alone units.
An optional rack-mounting kit is available to mount up to 3 units in a 1 Rack-unit or 1 ¾” by
19” rack space. The part number is –RMT.
Table 6. Settings for Analog Audio Channel 2
Sw 3
Position
Function
Setting (Default values in Bold)
1-2
An. Audio 1 FS
on-on= 28dBu FS on-off = 16dBu FS off-on = 10dBu FS
off-off = 4dBu FS
3-4
An. Audio 2 FS
on-on= 28dBu FS on-off = 16dBu FS off-on = 10dBu FS
off-off = 4dBu FS
Table 7. Settings for Data Types