Black Box Cable Box May-95 User Manual
16
MULTI-FUNCTION LD CARD
Table 3-4. Recommended Impedance Settings
S3-4: Mode Selection
Set position 4 of switch S3 to determine whether the Multi-Function LD Card
operates in point-to-point or multipoint mode.
Set position 4 of switch S3 to determine whether the Multi-Function LD Card
operates in point-to-point or multipoint mode.
S3-4
Operation
On
Point-to-point (also multipoint as the “master”) (default)
Off
Multipoint (as a “slave”)
S3-5: DTE RS-232 Initiation of Local Loopback Test
Set position 5 of switch S3 to determine whether or not the attached DTE can
initiate the Multi-Function LD Card’s local analog loopback test by raising the
Local Loopback (LL) signal on Pin 18 of the RS-232 interface.
Set position 5 of switch S3 to determine whether or not the attached DTE can
initiate the Multi-Function LD Card’s local analog loopback test by raising the
Local Loopback (LL) signal on Pin 18 of the RS-232 interface.
S3-5
DTE Initiation of Local Loopback
On
Enabled
Off
Disabled (default)
S3-6: DTE RS-232 Initiation of Remote Loopback Test
Set position 6 of switch S3 to determine whether or not the Multi-Function
LD Card’s remote analog loopback test can be initiated by raising the Remote
Loopback (RL) signal on Pin 21 of the RS-232 interface.
Set position 6 of switch S3 to determine whether or not the Multi-Function
LD Card’s remote analog loopback test can be initiated by raising the Remote
Loopback (RL) signal on Pin 21 of the RS-232 interface.
S3-6
DTE Initiation of Remote Loopback
On
Enabled
Off
Disabled (default)
Cable
Data Rates in kbps
Gauge
1.2
1.8
2.4
3.6
4.8
7.2
9.6
14.4 19.2 28.8 38.4 57.6
19
320
320
200
200
200
200
200
130
130
130
130
130
22
320
320
320
200
200
200
200
200
130
130
130
130
24
320
320
320
320
200
200
200
200
200
130
130
130
26
320
320
320
320
320
200
200
200
200
200
130
130