Instruction Manual, DVM-2000
FEATURES and OPERATION
5
TRANSMITTER, DVM-2000-FTX
The transmitter unit, designated by model number DVM-2000-FTX, includes a
VIDEO IN
BNC connector in the rear and a front panel equalizer monitoring BNC, labeled
CLAMPED
VIDEO
. The gain and equalizing flatness of the input video can be adjusted from the front panel
and monitored from the
CLAMPED VIDEO
output. The
VIDEO GAIN
and
VIDEO EQ
controls
can be found on the transmitter front panel. For optimal system performance the
VIDEO GAIN
and
VIDEO EQ
adjustments should be set for 100 IRE units and a flat frequency response,
respectively. The transmitter front panel includes a
VIDEO PRESENT
LED to indicate the
delivery of video to the A to D. The
LASER FAIL.
LED indicates a laser failure when RED. The
AUDIO LEVELS OVERF.
LEDs indicate an audio level overflow in the audio A to D when RED.
This typically occurs when the input level e18 dBm. The
POWER
LED indicates that
power is ON.
RECEIVER, DVM-2000-FRX
The receiver unit, designated by model number DVM-2000-FRX, includes a
VIDEO OUT
BNC connector on the rear panel. The front panel control
VIDEO GAIN
is used to set the video
output level. The receiver front panel includes a
VIDEO PRESENT
LED to indicate the delivery
of video to the A to D. The
LASER FAIL.
LED indicates a laser failure on the transmitter or loss
of received optical signal when RED. The
POWER
LED indicates that power is ON.
AUDIO CHANNELS
The fiber optic system includes 6 channels of high quality CD grade audio encoded in 24
bits. The balanced audio inputs are configurable for 600 Ohm or High impedance terminations.
The termination can be found on the audio adapter board included with the unit. The factory
setting is 600 Ohms. The 600 Ohm termination may be removed for high impedance operation.
The balanced audio outputs have a source termination of 50 Ohms. The system is able to
accommodate a maximum input and output level of +18 dBm with a 600-Ohm termination. The
input level to the transmitter should not exceed +18 dBm. The
AUDIO OUTPUT LEVELS
on the
receiver have a +/- 6 dBm gain adjustment for setting system audio levels, labeled
CH1
through
CH6
. The audio I/Os are labeled
A1+, A1-
through
A6+, A6-
respectively. The terminal labeled
GND
is the audio ground connection.
DATA CHANNELS
The fiber optic system can accommodate up to 3 simplex RS-232 data channels. The 3
RS-232C data channel connections are labeled as
D0
,
D1
and
ALARM2
. The terminal labeled
GND
is the data ground connection. The third data channel can be configured as a local video
presence alarm on the transmitter side and as a remote alarm on the receiver side.
OPTICAL OPTIONS
The DVM-2000 Fiber Optic system is available in several different optical configurations.
There are multi-mode systems available with 1310 nm wavelengths. The multi-mode systems
are available with ST connectors. The singlemode laser systems are available in 1310 nm and
