GE A8950CC installation instructions Installing audio modules, Channel sequence is as follows

AUDIO INPUT TERMINATION Note: One switch per channel

ON

S1

Ch A

Ch B

High Z 600Ω

ON

S2

Ch C

Ch D

	AUDIO INPUT RANGE			AUDIO OUTPUT RANGE
Note: Two switches per channel				Note: One switch per channel
		ON		S7		ON
S3							Ch A
			Ch A				Ch B
	Low	High			Low	High
S4		ON		S8		ON
							Ch C
			Ch B				Ch D

High Z 600Ω

The A8920A units are shipped with the input impedance set at (high-Z). To select a 600Ω input impedance in place of the high-Z input, set switches SW1 and SW2 on the audio to 600Ω.

Figure 2. Audio Level Switch Positions

S5

S6

Low High

ON

Ch C

Low High

ON

Ch C

Low High

If a low audio level causes the output audio signal to degrade, the input sensitivity of the A8920A can be increased by switching to the 8 dBu maximum scale.

You can set the transmitter input to 8 dBu and the receiver output to 18 dBu to add 10 dB of gain to the system, however, this also increases system signal-to-noise ratio (S/N).

Low High

2. Installing audio modules:

Audio modules must be installed in slots 15, 16, 17, or 18 (color coded black). Up to four Audio modules can be installed per Phoenix node.

The channel sequence is as follows:

Slot 15, top RJ45 connector is assigned to Channel Inputs 1 and 2. The second RJ45 connector gets assigned to Channel Inputs 3 and 4. The third RJ45 connector gets assigned to Channel Outputs 1 and 2. The bottom RJ45 connector gets assigned to Channel Outputs 3 and 4. Subsequent modules, placed in slots 16, 17, and 18 are assigned

to Channels 5-8, 9-12, and 13-16 respectively.

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