Boonton 9240 RF Voltmeter - Manual (Page 41)

Boonton 9240 Series RF Voltmeter
3.3.2 Sensor Key.
Pressing the <Sensor> key brings the instrument to the Sensor menu and facilitates viewing and editing of the voltage probe’s
parameters. An access code is required to enter the editing mode (refer to Figure 3-14). A sample display of the Sensor menu
is shown in Figure 3-13.
The instrument is capable of using sensor calibration data from either the sensor data adapters or from any one of four internal
tables. The sensor calibration data contained within the sensor data adapter is only accessible to the installed channel. For
example, Channel 1 can use the sensor calibration data from any of the internal tables or the sensor data adapter 1. Similarly,
Channel 2 can use the sensor calibration data from any of the internal tables or the sensor data adapter 2.
Referring to Figure 3-13, the cursor can be positioned to three fields. The two fields below the 'CH1' and 'CH2' indicate the
serial number of the sensor whose calibration data is selected for channels 1 and 2 respectively. The instrument uses this data
for the linearity and high frequency correction data and automatically applies the correction to the measured value.
C H 1 C H 2
S E R # > 2 9 3 9 1 3 3 3 7 2
E D I T D A T A 2 9 3 9 1
Figure 3-13. Sensor Display Menu
To change the current selection for channel 1, use the arrow keys to move to the SER# command line and position the cursor
below the 'CH1' field. Press the <Enter> key and use the up/down arrow keys to scroll through the parameter list. The
parameter list typically consists of serial numbers for each voltage probe. Scroll through the list until the desired serial number
is displayed and press <Enter> to accept. Move the cursor below the 'CH2' field and follow the same procedure used to change
the table for channel 2.
The instrument detects the presence of the Data Adapter and automatically down-loads the sensor calibration data. This occurs
when the power to the unit is first applied or after plugging the Data Adapter into the instrument. The voltage probe and
corresponding Data Adapter have matching serial numbers for maintaining them as a matched pair.
EDIT DATA ACCESS CODE
The access code to enter the Edit Data menu is as follows:
Press the front panel switches in the following order:
<FREQ> <AVG> <AVG> <FREQ> <Sensor> <Enter>
Figure 3-14. Access Code
Getting Started
3-15