DB and 18 dB Output Pads, Computer Connections

ENGLISH

12 dB and 18 dB Output Pads

Each DFR22 output has a 12 dB pad and an 18 dB pad that can be engaged through the software interface. Use these pads when con- necting the DFR22 to lower-level inputs. They cannot be used to prevent clipping at the output stage of the DFR22

NOTE: The Output meters indicate the signal level present at the digital-to-analog converters. The 12 and 18 dB pads act upon the signal after the digital-to-analog converters, so the meters do not reflect the pads.

COMPUTER CONNECTIONS

RS-232 Connections

Connect the COM port on your computer to the 9-pin RS-232 con- nector on the front panel of the DFR22, shown in Figure 9, using a male-to-female serial cable. Pin outs for a 9–pin RS–232 cable are shown in Figure 10 and listed in Table 1.

NOTE: Only the TX, RX, and GND pins need to be connected in order to communicate with the DFR22.

You can also connect a computer or control system to the 3–pin RS-232 Phoenix connector on the back panel of the DFR22, as shown in Figure 11.

IMPORTANT: You CANNOT connect two PCs to the DFR22 at the same time. However, you CAN connect an AMX or Crestron sys- tem and a PC to the DFR22 at the same time.

RS-232 SERIAL PORT CONNECTION

Figure 9

9-PIN FEMALE	COMPUTER 9-PIN RS-232
9-PIN FEMALE	MALE CONNECTOR
TO COMPUTER

9-PIN MALE	DFR22 9–PIN RS-232
TO DFR22	FEMALE CONNECTOR

RS-232 CABLE PINOUTS

Figure 10

Shure Link Network

RS-232

PHOENIX RS-232 SERIAL PORT CONNECTION

Figure 11

Table 1. RS-232 PIN OUTS

DFR22	COMPUTER	PIN NO.

––	––	1

TX	RX	2

RX	TX	3

––	DTR	4

GND	GND	5

––	DSR	6

––	RTS	7

––	CTS	8

––	––	9

Up to 16 Shure Link devices, including the DFR22, DFR11EQ, DP11EQ, P4800, and UA888, can be linked and controlled from one computer. Using 5-pin DIN cables, connect the Shure Link IN and Shure Link OUT of each device, as shown in Figure 12.

NOTE: The last device in the chain MUST be connected to the first device (the one connected directly to the computer) to form a loop.

SHURELINK IN

DEVICE ID # 0

RS-232

DEVICE ID # 1

DEVICE ID # 2

SHURELINK OUT

SHURELINK NETWORK CONNECTIONS

Figure 12