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AM5(e) Classic Instruction Manual
6.
MEASURE FUNCTIONS AND PARAMETERS
The AM5(e) Classic contains highly versatile detectors and filters which are connected
to the receive line under test. The term MEASURE refers to the detection mode that has
been selected by the MEASURE key to detect and display the characteristics of the
received signal. The labels for the LEDs above the MEASURE key are different for the
AM5 Classic and the AM5e Classic to accommodate the characteristics of IEEE
Standard or CCITT Recommendations. The front panel areas for MEASURE functions
are shown below:
NOISE
IMP N
W/T
W/T
NOISE
IMP
NOISE
L/F
S/N
15kHz
RATIO
AM5 Classic
LEVEL
NTG
FREQ
M EA SUR E
This section describes all the MEASURE functions in the order they are selected by each
press of the MEASURE key (bottom to top, left to right). Unless otherwise specified, the
descriptions apply to both the AM5 Classic and the AM5e Classic. Views of the LED
indicators and displays showing typical readings are provided. A lighted LED is shown
by shading, as shown by above defaults.
If the LINE selection is 4W , the signal being measured must be connected to the RX
jack (or T1 and R1 terminals).
If the LINE selection is 4W REVerse, 2W, or 2W+2.16µf, the signal being measured
must be connected to the TX/2W jack (or T and R terminals).
For NTG (Noise-to-Ground) measurements, a reference ground must be connected to
the ground terminal on the rear panel or to the sleeve terminal of the RX (or TX/2W)
bantam jack.
Impulse Noise (IMP NOISE) and Impulse Noise with Tone (IMP N W/T) are the only
MEASURE functions that have parameters.
November 19, 1997
(18-0047)
MEASURE FUNCTIONS
AM5e Classic
Page 6-1
NOISE
IMP N
W/T
W/T
IMP
NOISE
NOISE
S/N
L/F
RATIO
UNWTD
NTG
LEVEL
FREQ
MEA SUR E
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