Teledyne MODEL T703 ユーザーズマニュアル

Each of the calibrator’s serial ports can be configured to operate in a number of different modes, listed in Table 
7-1.  As modes are selected, the calibrator sums the Mode ID numbers and displays this combined number on 
the front panel display.  For example, if quiet mode (01), computer mode (02) and Multi-Drop-enabled mode (32) 
are selected, the Calibrator would display a combined MODE ID of 35.   

Quiet mode suppresses any feedback from the calibrator (such as warning messages) 
to the remote device and is typically used when the port is communicating with a 
computer program where such intermittent messages might cause communication 
problems.   
Such feedback is still available but a command must be issued to receive them. 

Computer mode inhibits echoing of typed characters and is used when the port is 
communicating with a computer operated control program. 

When enabled, the serial port requires a password before it will respond.  The only 
command that is active is the help screen (?  CR).   

When turned on this mode switches the COM port settings 
 from 

No parity; 8 data bits; 1 stop bit 

to 

Even parity; 7 data bits; 1 stop bit 

Configures the COM2 Port for RS-485 communication.  RS-485 mode has precedence 
over multidrop mode if both are enabled. 

Multidrop protocol allows a multi-instrument configuration on a single communications 
channel.  Multidrop requires the use of instrument IDs. 

Enables to send a modem initialization string at power-up.  Asserts certain lines in the 
RS-232 port to enable the modem to communicate. 

Fixes certain types of parity errors at certain Hessen protocol installations. 

Disables XON/XOFF data flow control also known as software handshaking. 

Enables CTS/RTS style hardwired transmission handshaking.  This style of data 
transmission handshaking is commonly used with modems or terminal emulation 
protocols as well as by Teledyne Instrument’s APICOM software. 

Disables the HARDWARE FIFO (First In – First Out), When FIFO is enabled it 
improves data transfer rate for that COM port. 

Enables a command prompt when in terminal mode. 

1

 Modes are listed in the order in which they appear in the  

SETUP  MORE  COMM  COM[1 OR 2]  MODE menu 

2

 The default setting for this feature is ON.  Do not disable unless instructed to by Teledyne API’s Customer Service 

personnel. 

 

07223B DCN6378