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© Sage Instruments 2000
9100-2930-02 01/31/00
Sage Instruments 930i Communications Test Set
5-89 OPTION MENU #:89 PRINTER HAND SHAKE
OPTION MENU #:89, PRINTER HAND SHAKE, is a standard feature that enables you to select a form
of flow control when the 930i sends data to the printer. This allows the printer to tell the 930i to stop
sending when the printer’s buffer is full or the printer is off-line.
If your printer misses characters sent by the 930i, especially during long printouts such as digit analysis
or E1 BERT history, select a lower baud rate or use OPTION MENU #:89, PRINTER HAND SHAKE,
to output data at the greatest efficiency. The 930i supports DTR and XON/XOFF protocols.
To select a form of flow control when data is sent to a printer:
1. Press the Option Menu function key.
2. Use the Up/Down Arrow keys to scroll through the option menus, OR select 89 using the
numeric keypad and then press the Option Menu function key. The display reads:
OPTION MENU #: 89 PRINTER HAND SHAKE
K1
K2
K3
K4
3. Press ENT or any soft key (K1-K4) to activate your selection. The display reads:
HAND SHAKE: XON-XOFF DTR OFF
K1
K2
K3
K4
The factory default is
OFF
(no hand shake).
4. Press K2 under
XON-XOFF
to tell the 930i to wait for a n
XOFF
character. A cursor will appear
over your selection.
XON-XOFF enables the 930i to stop sending characters to the printer when it receives the XOFF
character (CNTL-S) from the printer. It will resume sending characters when it receives the XON
character (CNTL-Q). XON-XOFF protocol is useful when communicating over modems or other media
which do not allow a separate hardware hand shake, such as the DTR line.
5. Press K3 to enable DTR handshaking. A cursor will appear over your selection.
DTR handshaking allows the 930i to send characters to the printer only when it sees positive voltage
on DTR (pin 20). If your printer is off-line, powered down, or has a full buffer, it will not provide this voltage
and the 930i will “hang” when attempting to print. DTR handshaking allows the printer to “catch up” by
printing the contents of its buffer while the 930i waits. (The printers supplied by Sage Instruments are
shipped with DTR handshaking enabled.)
6. Press K4 under
OFF
to allow the 930i to send to any serial device.
Option Menu #:
89
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Содержание 930i
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