Low-Speed Signaling Conventions; Table 8-4: Passive Drive Characteristics; Table 8-5: Low-Speed Data Port Signaling Conventions - DirecTV D10 Installation Manual

DIRECTV Set-Top Box Information for the Installer

8.5 Low-Speed Signaling Conventions

The data port signaling conventions will be as listed in Table 8-5.

Table 8-5: Low-Speed Data Port Signaling Conventions

The idle state for data port pins two (2) and three (3) will be "mark".
DIRECTV, Inc.
Version 2.2

Table 8-4: Passive Drive Characteristics

Parameter
-2 mA ±20% at + 3 volts and –10
Output
mA ±20% at –5 volts
Interchange Voltage
Binary state
Signaling state
Function
Page 41 of 42
Specification
Negative or Positive
1 or 0
mark or space
OFF or ON
March 5, 2008
DTV-MD-0058