Kramer Electronics VP-885 - Manual (Page 30)

KRAMER: SIMPLE CREATIVE TECHNOLOGY
Controlling the VP-885
26
When increasing/ decreasing the audio gain, the output signal level is
higher/lower than the input signal level.
Gain level values are relative since the audio input signal can be also adjusted
independently of the output level adjustment.
7.8 Resetting the Unit
To reset the unit:
• Press and hold the Reset button on the rear panel while powering on the
device.
The unit resets and a Status display self-test is performed (see
Section 7.4.1
8 Controlling the VP-885
)
The VP-885 can be controlled via any of the following:
• RS-232 (see Section 8.1
• RS-485 (see
)
Section 8.2
• Ethernet (see
)
Section 8.3
8.1 Controlling the VP-885 via RS-232
)
To control up to sixteen VP-885 units from a PC or serial controller via
RS-232, as illustrated in Figure 21 :
1. Connect the video sources and acceptors, the appropriate audio sources
and acceptors, and the power cord to each VP-885.
2. Connect the PC to the first VP-885 via an RS-232 serial cable (see
Section 6.2
3. Set the Machine number on the first VP-885 to be Machine 1 (see
)
Section 6.5
4. Terminate the RS-485 line on both the first VP-885 and on the last
VP-885 (see
).
Section 6.5
5. Set the Machine number on all VP-885 units other than Machine 1 to a
unique number
).
1 between 2 and 16 (see Section 6.5
6. Connect the RS-485 port on the first VP-885 to the RS-485 terminal
block on the second VP-885 unit as follows:
).
 Connect the A (+) pin on the RS-485 rear terminal block of the first
VP-885 to the A (+) pin on the RS-485 rear panel terminal block on
the second VP-885
1 Set the first unit to Machine number 2, the second unit to Machine number 3, etc. up to 16