Performance Verification and Adjustments
1
Keysight 8990B Service Guide
25
Equipment or high power verification (>+10 to +20 dBm):
– PSG analog signal generator (E8257D)
– Power sensor (N8481A/N8487A)
– Power meter (N1914A/E4417A)
– PEAK Power Analyzer and sensor [DUT] (8990B and N1923A/N1924A)
– Power amplifier
– Directional RF coupler
– Low-pass filter (for reducing the high harmonic content of the test signal to
approximately -30 dBm for the 2nd harmonics)
Procedure
Low power verification
NOTE
– The accuracy error measured in this verification includes a combination of
errors for linearity, calibration factor, and temperature compensation.
– The maximum input power to the 11667A splitter is 0.5 W or +27 dBm.
– To set the sensor mode (Average/Normal mode), send the SENS:DET:FUNC
AVER|NORM command. (Use with Power sensor and Power meter)
– To set the sensor video bandwidth, send the SENS:BAND:VID OFF command.
(use with Power sensor and Power meter)
– To set the sensor video bandwidth, send the CHAN 1|4:BWID OFF command.
(use with PEAK Power Analyzer and sensor [DUT])
– The hardware paths for the OFF and HIGH video bandwidth are identical,
while the paths for the LOW and Low video bandwidths are identical.
– Verification for the sensor's Normal mode can be performed in the Off video
bandwidth settings.
Содержание 8990B
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