Agilent Technologies 35670A User Manual

3 Specify the measurement parameters.
Press [
Freq
][
MAX ORDER
] <number> [
ORDERS
] to specify the maximum number of
orders you want to measure.
Press [
MIN RPM
] <number> [
RPM
], then press [
MAX RPM
] <number> [
RPM
]tospecify
the range of frequencies over which you will measure.
Press [
DELTA ORDER
]1[
ORDERS
].
Press [
Input
].
For both channels, press [
CHANNEL 1 2
] (or [
CHANNEL 1 2 3 4
]) to highlight its channel
number, then press [
CHANNEL x RANGE
] <number> <unit>.
4 Press [
Scale
], then press [
AUTOSCALE ON OFF
] to highlight ON.
5 Turn on the device-under-test (DUT), then press [
Start
].
With a four-channel Agilent 35670A, you can use four transducers to display two
independent orbit diagrams. This allows you to measure two points on the DUT
simultaneously. Use channels 1 and 2 to measure one point, and channels 3 and 4 to
measure the other (with the horizontal transducers connected to channels 1 and 3).
You must modify the last few instructions in step 2, as shown below:
Press [
CHANNELS 1 2 4
] to highlight 4 (rather than 2), then press [
REF CHANS 1 1,3
]to
highlight 1,3.
Press [
Disp Format
][
UPPER/LOWER
].
Activate traces A and B, then press [
Meas Data
][
ALL CHANNELS
][
ORBITS */*
].
Activate trace B, then press [
CHANNEL 1 2 3 4
] to highlight 3.
Agilent 35670A
Operator's Guide Measuring Rotating Machinery
1-21

Agilent Technologies 35670A Specifications

General

Brand	Agilent Technologies
Model	35670A
Category	Measuring Instruments
Language	English