724-746-5500 | blackbox.com
724-746-5500 | blackbox.com
Page 15
Chapter 3: Installation
3.3.5 Config Mode 1: 4th-Pair Modes
Step
Number*
LED 4
LED 5
LED 6
Front-Panel View
4th-Pair Operating Mode
1
dim
dim
dim
4th-pair signals are disabled. This effectively “mutes” anything sent on the 4th pair.
Use this for diagnostics.
2
dim
dim
ON
Direct pass-through of 4th-pair wires. Use this for custom applications.
3
dim
ON
dim
External analog (L + R summed) audio. This is the factory default mode.
4
dim
ON
ON
External S/PDIF digital audio. Input impedance = 75 ohms.
5
ON
dim
dim
Simplex serial.
Table 3-2. Config mode 1, 4th-pair operating mode options.
Follow these steps*:
1. (starting in normal-mode) Press and release the CFG button once to access configuration mode-1. CFG indicator = on.
2. Press and release the SEL button twice. You will now be able to change 4th-pair option settings.
3. LED indicators 4–6 should be illuminated (either DIM or ON); all others (indicators 1–3, 7, and 8) should be off.
4. Press the CFG button repeatedly to step through the available 4th-pair option settings.
5. To leave configuration mode, step through all the options OR leave the buttons untouched for 10 seconds.