HP E1563A User Manual page 151

Filter
This test checks the filter input bandwidth for the 25 kHz filter on the HP E1563A
or each of the four filters (1.5 kHz, 6 kHz, 25 kHz and 100 kHz) on the HP E1564A.
Bandwidth
The test This test uses an external source connected to the HI and LO Input
terminals and has the "L" terminal connected to the "G" terminal. The digitizer is
set to the 1V range for all tests.
1. Set up the digitizer as follows:
Reset the digitizer *RST
Set all channel's to 1V range; VOLT1:RANG 1; VOLT2:RANG 1; etc.
Set input filter frequency to 25 kHz;INPut1:FILTer:FREQ 25e3
Enable the input filter;
2. Set the AC Standard output to 0.95V @ 25 kHz and connect it to the
digitizer's channel 1.
3. Perform the filter bandwidth measurement using the INITiate command.
Retrieve the reading using the DATA? 1,(@1) command.
4. Record the result on the Performance Test Record and verify the result is
within specified limits.
5. Move the AC Standard output to the channel 2 input. Perform the filter
bandwidth measurement using the INITiate command. Retrieve the reading
using the DATA? 1,(@2) command.
6. Verify the result is within specified limits and record the result.
7. Repeat steps 1 through 6 for channels 3 and 4 on the E1564A 4-Channel
Digitizer using:
VOLT3:RANG 1, INPut3:FILTer:FREQ 25e3,
INPut3:FILTer:STATe ON, VOLT4:RANG 1,
INPut4:FILTer:FREQ 25e3, INPut4:FILTer:STATe ON.
8. HP E1564A 4-Channel Digitizer: Test the remaining three filters present on
the HP E1564A 4-Channel Digitizer. Repeat steps 2 through 6 for the
remaining three input frequencies listed at the bottom of Table D-5 for
channels 3 and 4.
This requires you change input filters before you begin testing by executing
the INPut<channel>:FILTer:FREQ <filter_frequency> command.
Additionally, step 3 requires the DATA? 1,(@3) command and step 5
requires the DATA? 1,(@4) command.
INPut2:FILTer:FREQ 25e3
INPut1:FILTer:STATe ON
INPut2:FILTer:STATe ON
HP E1563A and E1564A Verification Tests 151