MultiDyne DVM-2200 - Manual (Page 5)

Instruction Manual, DVM-2200 FEATURES and OPERATION 5
*** Confidential *** Multidyne Video & Fiber Optic Systems
TRANSMITTER, DVM-2200-FTX
The transmitter unit, designated by model number DVM-2200-FTX, includes a VIDEO IN
BNC connector, J5, in the rear of the UTIL-200-DVM Tray and a front edge equalizer monitoring
BNC. The gain and equalizing flatness of the input video can be adjusted from the front edge and
monitored from the front edge output. The VIDEO gain and video EQU controls can be found on
the transmitter front edge. For optimal system performance the VIDEO gain and video EQU
adjustments should be set for 100 IRE units and a flat frequency response, respectively. The
transmitter front panel includes a VIDEO PRES LED to indicate the delivery of video to the A to
D. The laser FAIL LED indicates a laser failure when RED. The audio level OVF LEDs indicate
an audio level overflow in the audio A to D when RED. This typically occurs when the input level
exceeds +18 dBm. The SDI Serial Digital Video input is J1 on the rear of the Tray. When an SDI
signal is present, it takes priority and is transported through the system. When no SDI is present,
the analog video and audio signals are transported. The POWER LED indicates that power is
ON the UTIL-200-DVM power supply units. The SDI input has a squelch circuit controlled by
R51. The clock-wise position turns the squelch OFF. The squelch is set to prevent false SDI
triggers due to noise.
RECEIVER, DVM-2200-FRX
The receiver unit, designated by model number DVM-2200-FRX, includes a VIDEO OUT
BNC connector, J5, on the rear of the UTIL-200-DVM. The receiver front panel includes a VIDEO
PRESENT LED, labeled VIDEO, to indicate the delivery of video to the A to D. The NO
LOCK/SDI LED, labeled NO LOCK, indicates that the decoder multiplexer is not locked or that an
SDI signal is present when RED. The SDI Serial Digital Video output is J1 on the rear of the
Tray. When an SDI signal is present, it takes priority and is transported through the system. The
VIDEO GAIN is controlled by the potentiometer VID. The AUDIO GAIN is controlled for channels
1 through 6 via the potentiometers labeled 1 through 6. The POWER LED indicates that power
is ON. The jumper J5 should be set in the SYNC mode with the jumper in the left most position.
The jumper J4 should be in the upper position.
AUDIO CHANNELS
The fiber optic system includes 6 channels of high quality CD grade audio encoded in 24
bits. The balanced audio inputs are High impedance by default. When the optional –DVMAUDIO
Screw Terminal Adapters are used, the input impedance is 600 Ohms by default. 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
brought to a 25-pin D-type connector on the rear of the UTIL-200-DVM Tray. When using the
optional –DVMAUDIO adapter board, the audio I/O’s 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 D2. The terminal labeled GND is
the data ground connection.