Boonton 4500B Peak Power Meter - Manual (Page 187)

Boonton 4500B RF Peak Power Analyzer
Operation 4-115
4.20 Automatic Operation
The Model 4500B can make up to 15 automatic measurements. The available measurements depend upon the operating mode
and the characteristics of the displayed waveform. Pressing the Text system key will display all of the available automatic
measurements in the current mode. When the readings are invalid the numeric display will be filled with dashes ―--.-‖. Over
range will be indicated by up arrows " " and under range by down arrows "v ".
A single channel instrument can make the following list of measurements on Channel 1, External Trigger 1, Memory channel
1 and Mem channel 2. For a dual channel instrument add Channel 2 and External Trigger 2. Memory channel measurements
correspond with the type of waveform stored.
AUTOMATIC MEASUREMENTS
– PULSE MODE
The information displayed in the Pulse mode text report is based on the data captured. Parameters such as pulse width,
period, and repetition frequency, can only be displayed if there are a sufficient number of pulse transitions on the display. For
pulse width, there must be at least two pulse transitions; for pulse period, duty cycle and repetition frequency there must be
three. If the number of transitions is insufficient to determine one of these parameters, the display will show ―--.-‖ instead of
a numeric value. Rise and fall times are most accurately measured when the instrument‘s timebase is set so that each
transition takes at least one full display division.
Table 4-57. Pulse Mode – Automatic Measurements I
CH1&2 CH 1&2
Name (Power Units) (Voltage Units)
Width Pulse width Pulse width
Rise Pulse risetime Pulse risetime
Fall Pulse falltime Pulse falltime
Period Pulse Period Pulse Period
PRFreq Pulse repetition frequency Pulse repetition frequency
Duty C Pulse duty cycle Pulse duty cycle
OffTime Pulse offtime Pulse offtime
Peak Peak power Peak voltage
Pulse Pulse (on) average power Pulse (on) average voltage (converted)
Oversh Pulse overshoot (power ratio) Pulse overshoot (voltage ratio)
Avg Average power of pulse period Average voltage (converted) of pulse period
Top Pulse top level power Pulse top level voltage
Bot Pulse bottom level power Pulse bottom level voltage
Skew Pulse time skew, Ch 1 to Ch 2 Pulse time skew, Ch 1 to Ch 2
EdgeDly Edge delay - time from left edge of Edge delay - time from left edge of
display to first mesial edge of either display to first mesial edge of either
slope on the displayed waveform slope on the displayed waveform