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3.0 Product Signal Format & Specifications
The FT/FR-4W2D/2D-x series products transmit and receive the following signals:
Signal Type
Channels
Transmit
Receive
NTSC/PAL/SECAM video
1 to 4
FT-4W2D/2D-x
FR-4W2D/2D-x
RS-232 (Tx & Rx data)
2
Yes
Yes
The tables below identify the specifications for the various signals that these
modems transmit/receive.
Video
Format
NTSC, PAL, SECAM
Voltage/Impedance
1Vp-p, 75 Ohm, 1.5Vp-p (max)
Bandwidth
5 Hz to 7 MHz @ -3 dB
Differential Gain
<0.6%
Differential Phase
<0.3
o
SNR
>67dB (weighted)
Return Loss
>30dB
Field Tilt
<0.5%
Data
Formats
RS-232
Date Rate (RS-232)
DC to 125 Kb/s
Bit Error Rate (BER)
Better than 10
-9
Connectors
Video
75 Ohm BNC w/gold center pin
Data
RJ45
Optical
Singlemode – ST or FC
Multimode - ST
3.1 Optical Specifications
The table below lists the optical specifications for both singlemode and multimode fiber
applications.
Optical Specifications
Fiber Type/Size
(um)
Optical
Output
(dBm)
Rx
Sensitivity
(dBm)
Optical
Budget
(dB)
Wavelength
(nm)
Optical
connector
Optical
Dynamic
Range (dB)
Multimode (FP Laser)
62.5 / 125
-5
-25
20
1300/850
ST
25
Singlemode (FP Laser)
9 / 125
-5
-25
20
1310/1550
ST, FC
25
