Specifications

Guide to Operation - Menus
25
FRONT PANEL MENUS
The lower line of the LCD display is the menu
line. Menu lines are grouped into six menus. To
select a new group or menu, press a new menu
key. The menu line that will be displayed is the
most recently active menu line of the new menu.
Each menu contains several lines. Each line may
consist of 1 or 2 displayed parameters. The
DOWN and UP keys change which menu line
within a menu will be displayed. The DOWN key
displays the next menu line and the UP key, the
previous line. Pressing either key many times in
succession will scroll through all of the menu lines
within a menu.
If the menu line contains two parameters, the
LEFT and RIGHT keys select between the two.
On some lines, the right hand parameter is active
only for certain values of other parameters. On
these lines, the right hand parameter may be
inactive.
The spin knob is used to modify the active
parameter. A flashing cursor precedes the value
which the knob will alter.
The following section details each menu line. The
lines are listed in the order in which the DOWN
key scrolls through each menu. For parameters
with limited choices, all selections are shown. For
numerical parameters, example values are shown.
MODE MENU
COUNT= A,B FOR T PRESET
A-B FOR T PRESET
A+B FOR T PRESET
A FOR B PRESET
This line selects the data display and the preset
counter. The upper line of the LCD is the count
display. There are four displays available; A and B
separately, A-B, A+B, or only A, depending upon
the COUNT selection. All count data is right
justified with leading zeroes off. The preset
counter is either T or B. The appropriate SET LED
will be on indicating which counter is preset. Note
that the choice of inputs to the counters determines
whether the count data measures rate, ratio, or
reciprocal.
Changing this line causes the counters to reset.
A= INPUT 1
10 MHz
The input to counter A can be either the internal
10 MHz timebase or the signal at INPUT 1
discriminated by the A discriminator. The selected
counter input can be viewed at the A DISC output.
The 10 MHz source is used for reciprocal
measurements or for quick testing of the counter
operation. The appropriate A counter source LED
is also lit.
Changing this line during a COUNT PERIOD may
result in a bad data point.
B= INPUT 2 BSET= ****
INPUT 1 1E0
9E11
The input to counter B can be either the signal at
INPUT 1 or INPUT 2 discriminated by the B
discriminator. The selected counter input can be
viewed at the B DISC output. The appropriate B
counter source LED is lit. Changing the counter
input during a COUNT PERIOD may result in a
bad data point.
If counter T is preset, the B SET parameter is
inactive (indicated by the **** on the display). If
counter B is preset (ratio or reciprocal
measurement), B SET is the B preset count from
1E0 to 9E11. Changing B SET during a scan
causes the counters to pause; any COUNT
PERIOD in progress is terminated and ignored. A
START begins the next COUNT PERIOD with
the new preset value.
T= 10 MHz TSET= 1E0 s
INPUT 2 1E7
TRIG 1E3
****