Instrument Operation - HP 4934A Operating And Calibration Manual

The HP 4934A measures impulse noise with or without a holding tone. The
HP 4934A transmits a holding tone and uses the notch filter in the receiver
when either the C-Message or 3 kHz Flat Filter is selected. With the 15 kHz
Flat, Program or 50 kBit Filter selected, the transmitter is quiet terminated
and the receiver notch filter is not selected.
Instrument Operation
10
1 Use M EAS to select IMPULSE NOISE.
TRANSMITTER
To measure Impulse Noise with a holding tone, go to step 2. To measure Impulse
Noise without a holding tone, go to step 5.
Impulse Noise with a Holding Tone
2 Select either the C-Message or 3 kHz Flat Filter using the FILTER key.
3 Display the transmitted level and frequency using the DISPLAY key (the TRMT
indicator will be lit). Level, in dBm, is in the left window. The frequency (fixed
at 1004 Hz) is in the right window.
4 Set the transmitted level to the nominated data level using the OUTPUT LEVEL
control.
Impulse Noise without a Holding Tone
5 Select either the 15 kHz Flat, PRGM or 50 kBit Filter using the FILTER key. The
2-18 Making Measurements