HP 1652B Getting Started Manual page 201

.-
The User-defined option lets you set the threshold to a specific voltage
between - 9.9 V and + 9.9 V. If you select this option you will see a
Numeric Entry pop-up menu as shown.
[[""""I
Figure
9-6.
User-defined Numeric Entry Pop-Up Menu
You can change the value in the pop-up either with the keypad on the
front panel or with the KNOB, which you rotate until you get the
desired voltage. When the correct voltage is displayed, press SELECI'.
The pop-up will close and your new threshold will be placed in the pod
threshold field.
The threshold level you specify for the 16 data bits also applies to a
pod's clock threshold.
*-
Specify Symbols
This field provides access to the Specify Symbols menu. It differs from
the other fields in the State Format Specification menu in that it
displays a complete menu instead of a pop-up. The complete
description of the Specify Symbols Menu follows the State Format
Specification Menu fields later in this chapter.
Clock
The
Clock
field in the Format Specification menu displays the clocks
for clocking your system. The display will be referred to as the
"clocking arrangement."
The HP 1652B Logic Analyzer has five clock channels, each of which is
on a pod. The clocks are connected through the pods simply for
convenience. The clock channels are labeled J, K, L, M, and N and are
on pods 1 through 5, respectively. The clocking of the state analyzer is
synchronous with your system because your analyzer uses the signals
present in your system. The signal you use must clock the analyzer
when the data you want to acquire is valid.
The HP 1653B Logic Analyzer has two clock channels, each on one of
the pods. The J clock is on pod 1 and the K clock is on pod 2.
HP 16528/1653B
State Format Specification Menu
Front-Panel Reference
Q-7