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
Ω
, 1.5Vp-p (max)
Differential Gain
<1%
Differential Phase
<0.7
o
SNR >60dB
(weighted)
Return Loss
>30dB
Field Tilt
<0.5%
Data
Formats RS-485
(4-wire)
Data Rate (RS-485)
DC to 300Kb/s
Bit Error Rate (BER)
Better than 10
-9
Connectors
Video 75
Ω
BNC w/gold center pin
Data DB9
Female
Optical
Singlemode – ST or FC
Multimode - ST
4.0 Data SIM Signal Assignment (Pinouts)
There is one data SIM card in these modules. This data cards transmits/receives two
RS-485 (4-wire) data channels. The data SIM has a DB9 female connector.
The table below shows the appropriate pinout for each of the connectors
RS-485 Data Connector Pinout Assignment
(Port #4)
Pin #
DT-2V2K/2K
DR-2V2K/2K
1
Ch1 OUT (+)
Ch1 IN+
2
Ch1 OUT (-)
Ch1 IN (-)
3
Ch 2 OUT+
Ch2 IN (+)
4
Ch 2 OUT (-)
Ch2 IN (-)
5 Gnd
Gnd
6
Ch 1 IN+
Ch1 OUT (+)
7
Ch 1 IN (-)
Ch1 OUT (-)
8
Ch 2 IN+
Ch2 OUT (+)
9
Ch 2 IN (-)
Ch2 OUT (-)
700 Elmont Rd, Elmont, NY 11003, Tel: 516-285-1000; Fax: 516-285-6300
www.Meridian-tech.com
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