Kramer Electronics VP-8x8TP - Manual (Page 27)

Operating Multiple VP-8x8TP Units Remotely via RS-232
23
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3. Press either the (+) button or the minus (–) button to increase or decrease
respectively the audio gain setting.
The display changes accordingly.
4. Press the AUDIO LEVEL button to exit the gain level setting mode. If no
button is pressed for 40 seconds, the VP-8x8TP automatically exits the gain
level setting mode and the display reverts to normal operation.
7.8 Using the IR Transmitter
You can use the RC-IR3 IR transmitter to control the machine via the built-in IR
receiver on the front panel or, instead, via an optional external IR receiver1. The
external IR receiver can be located up to 15m (49ft) away from the machine. This
distance can be extended to up to 60m (196ft) when used with three extension
cables
2
Before using the external IR receiver, be sure to arrange for your Kramer dealer to
insert the internal IR connection cable
39F
3
with the 3.5mm mini connector that fits
into the REMOTE IR opening on the rear panel. Connect the external IR receiver
to the REMOTE IR 3.5mm mini connector.
8 Operating Multiple VP-8x8TP Units Remotely via RS-232
You can operate up to 16 VP-8x8TP units remotely via the RS-485 bus with
control from a PC or serial controller equipped with an RS-232 interface
40F
4
.
To operate up to 16 VP-8x8TP units remotely via RS-485 (see Figure 14 ):
1. Connect the sources and acceptors to the VP-8x8TP (see Section 6.1 ).
2. Connect the RS-232 port of the first VP-8x8TP unit to the PC or serial
controller.
3. Connect the RS-485 port on the first VP-8x8TP to the RS-485 port on the
second VP-8x8TP unit, and so on (see Section 6.2 ), connecting all the RS-485
ports.
4. Set the Machine number of the first VP-8x8TP to Machine number 1 (see
Section 6.2.2 ).
5. Set the other VP-8x8TP units to be Machine numbers between 2 and 16.
6. On the first and last VP-8x8TP units, set the RS-485 TERM Dipswitch ON
(terminating the RS-485 line at 120
Ω) (see
Section 6.2 ).
7. On all other VP-8x8TP units, set the RS-485 TERM Dipswitch OFF.
1 Model: C-A35M/IRR-50
2 Model: C-A35M/A35F-50
3 P/N: 505-70434010-S
4 Alternatively, the Ethernet port can be used for PC control (instead of RS-232)