Signal To Noise Ratio Accuracy - HP 4934A Operating And Calibration Manual

Signal to Noise Ratio Accuracy
SPECmCATION
TRANSMITTER
Holding Tone Frequency : 1004 Hz fixed tone
Other Specifications : See LEVEL FREQ in the Specifications in Chapter 3.
RECEIVER
Filters: C-Message, 3 kHz Flat, 15 kHz Flat, Program and 50 kBit (all +
Notch Filter)
Signal Level Range 600, 900 and 12000 :-40 to +10 dBm
Signal to Noise Ratio Range (Signal Level >-30 dBm) : lOto 45 dB
Signal to Noise Ratio Accuracy : 10 to 40 dB±l dB
: 40 to 45 dB±2 dB
DESCRIPTION
A Synthesizer and Power Adder (SA2) are used to check the Signal to Noise
Ratio accuracy. Signal to Noise Ratio is the amplitude ratio of the holding
tone to the background noise. An 1800 Hz tone is used to simulate the noise
and is added to the HP 4934A 1004 Hz holding tone using the Power Adder.
EQUIPMENT
Synthesizer : HP 3336B
Power Adder : SA2 (see Appendix B)
N OTE Do not use an AC Calibrator in place of a Synthesizer with a 600Q balanced output
or errors will occur.
Performance Tests 5-37