Boonton 4500B Peak Power Meter - Manual (Page 109)

Boonton 4500B RF Peak Power Analyzer
Operation 4-37
4.10 TIME (STAT) Key and Time > Menu
In the Pulse & Mod modes the TIME key activates the Time > menu (Figure 4-24). It controls the timebase and horizontal
position of the waveform display. In Statistical mode the TIME (STATISTICS) key activates the Statistics > menu
(Figure 4-25a and 4-25b). It controls the x-axis linear and logarithmic scales in percent and percent offset. Table 4-8A
describes the functions that appear in the Time > menu for pulse and modulated modes, and Table 4-8B describes the
functions that appear in the Statistics > menu for the statistical mode (Option 10).
Table 4-8A. Time > Menu
Menu Item Function
(Type) Selections (SCPI cmd)
Timebase Pulse & Mod Sets the horizontal sweep speed, time/Div
(Numeric) Discrete Range:
5 ns/Div to Press the Time > Timebase menu key if it is
60 min/Div not already activated. Adjust the timebase
using any of the data entry controls. When
selecting the timebase locally, using the
keypad, or remotely, over the GPIB, any
entry between valid timebase values will be
rounded up to the next valid timebase.
The horizontal (time) axis is subdivided into
ten major divisions of fifty data points (pixels)
each, plus one additional point on the right
border for a total of 501.
The timebase you select determines the time
resolution of all time measurements, including
the time markers (See Section 4-12) and the
trigger delay function (see below). The signal
sampling rate is 50 Msamples/sec. In the
timebase range from 5 ns/Div to 1us/Div,
(Fast Trigger ―off‖) or 5ns/Div to 500 us/Div
(Fast Trigger ―on‖) each pixel is a single
sample. For slower timebases, multiple
samples are averaged together to form each
pixel. The system automatically selects the
minimum number of samples to form each
pixel based on sweep speed and trigger delay.
The maximum and minimum values, before
averaging, and the average for each pixel are
saved for use in measurements and displays. Figure 4-24
See Display > Envelope. Time > Menu (Pulse)
DISPlay:PULSe:TIMEBASE <5e-9 to 3600> (sec/Div)
DISPlay:MODUlated:TIMEBASE <5e-9 to 3600> (sec/Div)