Black Box ME760A-R2, User Manual

Page: 34 / 48

33
CHAPTER 4: Card Installation
Table 4-2. Strap Selection, Card Version (continued)
Strap Identity Function Possible Standard
Settings Factory Settings
No. 11 Enables/disables control of the DIG, DIS
SWITCH ANA, and REM loopbacks with the EN EN
front-panel pushbuttons.
No. 12 CONNECT: Connects Signal Ground CONNECT CONNECT
GND to Chassis Ground. DIS CONN
DIS: Isolates grounds from each other.
No. 13 ON: AGC always ON. ON ON
AGC CTRL: AGC ON if DCD is ON, remains CTRL
at last level of amplification if DCD
goes OFF.
No. 14 ON: Activates V.54 delay, preventing ON
V.54-DLY multiple loopback of tail-end circuits. OFF OFF
OFF: No delay.
No. 15 S3 and S4 determine character lengths S3 S4 # bits
ASYNC when unit is in async mode. See OFF OFF = 8
LENGTH Table 3-3 on page 26. OFF ON = 9
ON
OFF = 10 10 bits
ON ON = 11
S2 determines amount of stop-bit ON = 25%
shortening for async mode. OFF = 12.5% 12.5%
(S1 is not used)