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Functional Overview
GB1400 User Manual 2-7
Analyzer (RX) Display
Like the Generator, the Analyzer has a two-line by 24-character high-contrast
liquid crystal display (LCD).The Analyzer display in its normal (non-menu)
mode is illustrated in the figure below.
Frequency (kHz) Error Rate Totalize
1405000 5.0E-06 2410538
1.2 ns PN23 -0.05 V
Delay/ Memory
Figure 2-8. Analyzer Display in Its Normal (Non-menu) Mode
Like the Generator, the Analyzer has a two-line by 24-character high-contrast
liquid crystal display (LCD). The function of each field in the normal Analyzer
display format -that is the format used when the Analyzer is not in the menu
mode -is described below:
• The top left section of the Analyzer display is used to show the measured
frequency of the input clock signal in MHz. For example a display of
622.05 indicates a measured frequency of 622.05 MHz. Note that the
Analyzer frequency display contains five significant digits while the
Generator frequency display contains six. This is because the frequency
shown in the Analyzer display is a measurement result while the frequency
shown in the Generator display is an instrument setup which is known with
more precision.
• The top middle and top right sections of the display normally show measured
bit error rate and bit errors respectively. BER is expressed in exponential or
"E" notation. For example, a display of 1.5E-09 indicates a measured BER
of 1.5 x 10
-9
. The Analyzer calculates BER and counts bit errors in three
modes simultaneously: Window, Test, and Totalize. The symbol in front of
the BER field indicates which mode has been selected for display. Window
results are preceded by a blank space, that is no symbol. Totalize results will
be preceded by an ∞ (infinity) symbol. Test results will be preceded by a T,
U, or R depending on the selected test mode: timed, untimed, or repeat.
Refer to Chapter 4 for more information on displaying Analyzer results and
starting and stopping tests.