Ametek 7270 - Appendix A: Specifications; Measurement Modes

Specifications
Appendix A
A-1
Measurement Modes
X In-phase
Y Quadrature The unit can simultaneously show any
R Magnitude four of these outputs on the front panel
 Phase Angle display
Noise
Harmonic nF, n  127
Dual Harmonic Simultaneously measures the signal at two different
harmonics F
1
and F
2
of the reference frequency
Dual Reference Simultaneously measures the signal at two different
reference frequencies, F
1
and F
2
, where F
1
and F
2
can be
set to be derived from the internal and/or external
reference sources.
Tandem Reference A variation of the Dual Reference mode, where the
signal is demodulated using the internal reference
frequency F
1
, and the resulting X1 channel output is
passed to a second demodulator running at an external
reference frequency F
2
Virtual Reference Locks to and detects a signal without a reference
(100 Hz  F  250 kHz)
Noise Measures noise in a given bandwidth centered at the
reference frequency F
Spectral Display Gives a visual indication of the spectral power
distribution of the input signal in a user-selected
frequency range lying between 1 Hz and 250 kHz. The
display is calibrated for frequency, but not amplitude,
and is intended to assist in choosing the best reference
frequency.
Display
320  240 pixel (¼ VGA) color TFT display panel giving digital, analog bar-graph
and graphical indication of measured signals. Menu system with dynamic key
function allocation.