5
SECTION 3: Operation
3.2 O
N
-L
INE
M
ODE
When you operate the KV1518A in On-Line Mode (see Figure 1), the main screen
area displays your interactions with the ASCII device, as if it were the screen of an
ASCII terminal. Simultaneously, the data stream being output by the device is
stored in an eight-page circular buffer, so you can not only access and operate the
device, but you can also review its historical data as needed. Because the buffer is
circular, it always retains the most recent eight pages of data from the device; the
newest data will overwrite the oldest data.
Conveniently, you may program any of the PC keyboard’s twelve function keys to
trigger your most-often-used data-stream commands (see
Section 4
). Pressing any
key you’ve set this way causes the Summit to send the corresponding command to
the device. During the online session, you can also send any of the following key
combinations (press and hold [Ctrl] or [Alt], press and release the command key,
and release [Ctrl or Alt]) to control your communication with the device or to
access the KV1518A’s help and setup screens:
• [Ctrl] + [Break] (the [Pause/Break] key next to the [Scroll Lock] key): Resets
both the KV1518A and the serial communication with the device.
• [Ctrl] + [S] (not case-sensitive): Sends an X-OFF command to the device to
temporarily stop it from sending any data; until the flow is allowed to resume,
all output data will be queued by the device. (If the device doesn’t support
X-ON/X-OFF flow control, this command has no effect.)
• [Ctrl] + [Q] (not case-sensitive): Sends an X-ON command to allow the device
to resume sending data after being halted by the [Ctrl] + [S] command.
• [Alt] + [F1]: Displays the Help screen shown in Figure 3.
• [Alt] + [F2]: Displays the Setup screen shown in Figure 4.
• [Alt] + [F3]: Displays the Set Up Programmable Keys screen shown in Figure 5.
• [Alt] + [F4]: Switch to Buffer Edit Mode, as shown in Figure 2.
3.3 B
UFFER
E
DIT
M
ODE
The KV1518A stores the most recent eight pages of data from the attached ASCII
device in a circular buffer. After you switch the KV1518A from On-Line Mode (see
Section 3.2
) to Buffer Edit Mode by pressing [Alt] + [F4], you can review the
contents of the buffer by moving the cursor with the arrow keys, [PageUp],
[PageDown], [Home], and [End]; see Figure 2. You can also edit the data in the
buffer with [Insert], [Delete], [Backspace], and the other keys listed in the Help
screen in Figure 3.