Example Program - Keysight Technologies E1445A Service Manual

Verification Tests
4 Set marker source to "ROSC" or "TRIG", as specified in Table 2-7:
5 If the marker source is "TRIG", use the following commands to output a square
where <frequency> is the value given in the "square wave Frequency" column of
Table 2-7.
6 Measure frequency with the Counter and record the reading in Table 2-11.
Table 2-8 Frequency Accuracy Test Points
Ref Oscillator
Source
INT1
INT2
INT2
INT2
INT2
*Add aging rate of ± 20 ppm/year

Example Program

This program performs the Frequency Accuracy Test.
58
ROSC:SOUR INT1
or
ROSC:SOUR INT2
MARK:FEED "ROSC"
or
MARK:FEED "TRIG"
wave (otherwise, skip this step):
FUNC SQU;
:FREQ2 <frequency>;
:TRIG:SOUR INT2
INIT:IMM
If the marker source is "TRIG", the marker output frequency will be
four times the frequency of the square wave, since it takes four
points to produce a square wave. See Table 2-7 for the expected
frequencies.
Marker Source
"ROSC"
"ROSC"
"TRIG"
"TRIG"
"TRIG"
10! RE-STORE "OSC_FREQ"
20 DIM Freq(1:5)
30 !
40 !---------- Set up I/O path and reset AFG ----------
Set ref osc to INT1
Set ref osc to INT2
Set marker source to "ROSC"
Set marker source to "TRIG"
Select square wave
Set AFG frequency
Set trig source
Initiate
square wave Test Limits (Hz)*
Frequency (Hz)
---------- 42.94967 E6
---------- 40 E6
5.0 E6 20 E6
3.333 E3 13.3333 E6
76.294 305.176
Keysight E1445A Arbitrary Function Generator Service Guide
Test 2-7: Frequency Accuracy
±
0.005%
±
0.005%
±
0.005%
±
0.005%
±
0.005%