Front Panel Operation
2-125
GENERAL MENU selection is used to set the time date and
format (12-hour or 24-hour) for the real time clock.
TIME: This item is used to set the time for the clock. If the
12-hour format is selected, “AM” or “PM” will be displayed.
The absence of “AM” or “PM” denotes the 24-hour format.
The format for time can be changed with the FORMAT menu
item. Use the cursor keys and the range keys to set the time
(hours:minutes:seconds). Press AUTO to set seconds to zero.
DATE: This item is used to set the date for the clock. Use the
cursor keys and the range keys to set the date. Note that the
day of the week (Sun, Mon, etc.) is automatically calculated
and displayed for the date.
FORMAT: This item is used to select the time format for the
clock:
• 12-HOUR — With this selection, real-time timestamps
for buffer readings are provided in the 12-hour format
(AM or PM). Also, the real-time clock control source
for the Arm Layer must be set using the 12-hour format.
• 24-HOUR — With this selection, real-time timestamps
for buffer readings are provided in the 24-hour format.
Also, the real-time clock control source for the Arm
Layer must be set using the 24-hour format.
Note that real-time timestamps for bus readings are always
provided in the 24-hour format, regardless of the FORMAT
selection.
2.20 Scanning
The Model 6517A can be used with an internal scanner card
(i.e., Model 6521 or 6522) or with external scanner cards in-
stalled in switching mainframes such as the Models 706,
7001 and 7002.
A scanner allows you to switch among a number of input sig-
nals to the Model 6517A for measurement. The channel con-
trol and scanning capabilities depend on whether an internal
or external scanner card is being used, as well as on the ca-
pabilities of the scanner card in question.
2.20.1 Internal scanning
By installing one of the optional scanner cards in the rear
panel option slot, the Model 6517A can close and open indi-
vidual channels, or scan through the channels.
Detailed operating instructions for internal scanning are pro-
vided in the instruction manual for that particular scanner
card. For example, to use the Model 6521 scanner card, refer
to the Model 6521/6522 Instruction Manual for operating in-
formation.
2.20.2 External scanning
When using external scanning, you can configure the Model
6517A to measure up to 400 channels. In order to synchro-
nize Model 6517A measurements with external channel clo-
sure, connect the Model 6517A external trigger inputs or the
trigger link to the external switching mainframe trigger in-
puts and outputs. Refer to paragraphs 2.15.4 and 2.15.5 for
examples on using external triggering and the trigger link.
Use the following information to configure the Model 6517A
for external scanning, and to start the external scan. Refer to
the documentation supplied with the switching mainframe
and the scanner card for specific configuration and connec-
tion information.
The following procedure uses menu structures to configure
the instrument for external scanning. General rules to navi-
gate through the menus are provided in paragraph 2.3.5.
1. Set up the Model 6517A for the desired measurement
(i.e., set function, range, etc.).
NOTE
If there is no card installed in the option
slot of the Model 6517A, external scan-
ning will automatically be selected. If
there is a card installed in the option slot,
you will have to select external scanning
as explained in the following step:
2. Press CONFIG and then CARD, and perform step a or b.
A. Option slot empty — You will be prompted to spec-
ify the number of external channels (inputs) to scan.
After entering the value, press ENTER.
B. Card installed in option slot — Select the ENTER-
NAL-INPUTS (CHANNELS) option from the
menu and then specify the number of external chan-
nels (inputs) to scan. After entering the value, press
ENTER. Use the EXIT key to back out of the menu
structure.
3. Press the CARD key and perform step a or b.
A. Option slot empty — The displayed message will
prompt you to reset the external scanner. Press EN-
TER when ready.
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