Boonton 4500B Peak Power Meter - Manual (Page 67)

Boonton 4500B RF Peak Power Analyzer
Getting Started 3-33
MENU ITEM EXERCISE
CHAN (continued)
Chan 1 > Exten
Press the Chan 1 > Extensions > Video BW menu key to toggle between the ―Low‖ (narrowband)
> Video BW and ―High‖ (wideband) sensor bandwidths. The bandwidths and risetimes corresponding to the
―Low‖ and ―High‖ sensor selections are presented in the specifications section of the Boonton
Sensor Manual. In general the ―Low‖ position reduces the RF noise level, but has a slower
risetime and falltime. The ―High‖ position is used for most applications, especially when the
fastest risetime and falltime is needed. Some sensor models may have only a single bandwidth
available. In this case the menu setting will have no effect.
TIME
Press the TIME function key to obtain the Statistics controls and perform the following exercises
to become familiar with the items in the Time > menu (Figure 3-7):
Time (Statistics)
Press the Time (Statistics) > Presentation menu key to alternately select a linear > Presentation or
logarithmic probability scale. Both scales have range and offset controls.
Time (Statistics)
Press the Time (Statistics) > Horz Scale menu key to adjust the probability scale.
> Horz Scale
Linear Scale: Use any of the data entry controls to step the horizontal scale through the sensitivity
settings, 10 %/Div, 5%/Div, 2%/Div, 1%/Div, 0.5%/Div, 0.2%/Div and 0.1%/Div.
Log Scale: Use any of the data entry controls to step the horizontal scale through the choices of
number of displayed decades: 1 to 7 decades.
Time (Statistics-LIN)
For linear scales press the Time (Statistics) > Horz Offset menu key to adjust the probability scale
> Horiz Offset linear offset. Use any of the data entry controls to enter the percentage offset required. The
allowable range is 0% to 100% 10*Horiz Scale setting. (e.g. for 0.5%/Div, the max offset is
95%)
Time (Statistics-LOG)
For logarithmic scales press the Time (Statistics) > Full Scale menu key to >Full Scale adjust the
full scale decade value. This is the value of the right hand edge of the display. Use any of the data
entry controls to enter the decade full scale value required. The allowable range is 0.01% to
100%. By shifting in this way a total of 11 decades of probability can be displayed.