Instruction manual

Page 34
UTY4422-001 Page 34 of 74
3.6.5 Display / Push Buttons
This interface supports a variety of controls and status displays, including the following:
1. Status.
2. Selecting and configuring the Serial Port devices.
3. Setting the LNB LO's.
4. Front panel email.
See the Display / Push Button Menus, Appendix A, for complete details.
3.7 SERIAL PORT - COMMAND SYNTAX
The UNITY4422 contains two serial ports. These are labeled Serial Port 1 and Serial Port 2.
Each can support a printer, a terminal, a modem, or an auxiliary data device. However, there are
restrictions as to what device combinations can be used at one time. There are only 2 rules for
this, and they are shown below. (Also, see Table 16, this Page.)
1. The same device type (Printer, terminal/modem, or aux. data) cannot be configured
on both ports at the same time. (Terminals and modems are considered the same
device type. See Rule 2.)
2. The combination of a terminal on one port and a modem on the other is not allowed.
The statements on the second line of Table 16 tell which devices can be connected to Serial Port
2 when the device on the top line is connected to Serial Port 1.
Table 16. Serial Port Device Combinations
Serial Port 1 Printer Aux. Data Terminal Modem
Serial Port 2 Any but Printer Any but Aux. Data Any but Terminal
or Modem
Any but Terminal
or Modem
Port Communication is fixed at 1 stop bit and 8 data bits, and there is no handshaking. The
serial port’s behavior for each of its device types is shown in the following table.
Table 17. Serial Port Settings
Device Serial Port Behavior
Printer Configured to B, N, 8, 1 (* see note 1 below.).
Aux. Data Configured to B, N (* See note 2 below.).
Terminal Configured to 19200, N, 8, 1. The unit responds to the terminal/modem
commands described in Sections 3.6.1 & 3.6.2, and Appendix A.
Modem Configured to B, N, 8, 1 (* see note 3 below.). The unit responds to the
terminal/modem commands described in Sec. 3.6.1, 3.6.2 and Apdx A.