HP 8590 E-Series User Manual page 198

HP 8592L and HP 8593E only.
1 9 . 1 - 2 2
BAND 4 locks onto harmonic band 4. Harmonic band 4 is preselected and has a
specified tuning range of 19.1 to 22 GHz.
Front-Panel Key Access:
9 kHz
allows a 6 dB resolution bandwidth of 9 kHz. This bandwidth is useful when
performing electromagnetic interference (EMI) measurements.
EM1 BW
Front-Panel Key Access: m
1 2 0 kHz
allows a 6 dB resolution bandwidth of 120 kHz. This bandwidth is useful when
EM1 BW performing electromagnetic interference (EMI) measurements.
Front-Panel Key Access: (Bw
200
Hz
EM1 BW allows a 6 dB resolution bandwidth of 200 Hz. This bandwidth is useful when
performing electromagnetic interference (EMI) measurements.
Front-Panel Key Access: m
exchanges the contents of the trace A register with the trace B register and
A<-->B
puts trace A in view mode.
Front-Panel Key Access: C-1
A-B -3 A
when ON is underlined, subtracts the data in trace B from the measured data
in trace A. A minus sign (-) appears between the trace A status and the trace
ON OFF
B status in the screen annotation while the function is active.
To deactivate this function, press A - B + A ON OFF so that OFF is
underlined. The A-B -+ A and B-DL + B functions are math functions.
Unlike operations on dBm units, math functions operate on measurement units.
Measurement units are used to format trace data for data within the graticule
limits. The displayed amplitude of each element falls on one of 8000 vertical
points with the value of 8000 being equal to the reference level. For log scale
data, each point is equal to 0.01 dB. The peak of a signal equal to -10 dBm,
or one division below the reference level, is equal to 7000 measurement
units (8000 - 1000 = 7000). In linear mode, each point has a resolution of
[reference level in volts/8000].
For example, if trace A contains amplitude values of -10 dBm and trace B
contains amplitude values of -40 dBm, the result of the A - B + A function
would be -10.004 dBm if dBm units were used. Since measurement units
are used for the A - B -+ A function, the result of A - B + A is -50 dBm
(- 10 dBm = 7000 measurement units, -40 dBm = 4000 measurement units;
the result is 3000 measurement units, which is equal to -50 dBm).
Front-Panel Key Access: (TRACE)
copies trace A into trace C.
A - C
Front-Panel Key Access: [TRACE)
accesses the softkey menu for selecting screen title characters A through F.
ABCDEF
Front-Panel Key Access: (CAL), t-1, fjj), [RECALL), or (SAVE_)
Key Descriptions 7-5