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AM5(e) Classic Instruction Manual
5.2.11 SEND QUIET selection: The signal generator is
disconnected from the line when QUIET has been
selected by the left SEND switch; however the TX/2W
line remains terminated by the selected TX/2W
impedance.
NOTE: For an "open circuit" configuration refer to
the description in sub-section 9.7.
5.2.12 SEND SF SKIP selection: This is a lock-out which
prevents the SEND circuits from sending any
frequencies in the SF signaling band. It has no effect on
the impedance presented to the TX/2W line.
5.2.13 FILTER selections: Noise-Weighting Filters are
selected by the left FILTER key, and are provided to
limit certain parts of the signal spectrum being applied
at the RX jack (or TX/2W in either 2W mode) from
reaching the measure circuits. The filters have no effect
on the impedance presented to the line, but they will
affect the levels measured in accordance with the filter
characteristics. Refer to Section 7 for filters supplied
with the AM5 Classic and Section 8 for filters supplied
with the AM5e Classic.
NOTE: These filters are only switched into the circuitry
when noise measurements are being made. Refer to Section 6.
5.2.14 FILTER 60 Hz selection: The 60 Hz filter, selected by
the right FILTER key produces a sharp roll-off in low
frequency response below 60 Hz. It takes effect
independently of other FILTER selections. Its primary
purpose is to limit power-line interference from
affecting readings. This filter has no effect on the
impedance presented to the RX line.
November 19, 1997
(18-0047)
Page 5-5
LINE FUNCTIONS
F4
SWEEP
2713Hz
F3
VAR Hz
2804Hz
F2
1004 Hz
1004Hz
SF
F1
QUIET
404Hz
SKIP
SEN D
(AM5 Classic)
F4
SWEEP
3004Hz
F3
Hz
2004Hz
F2
1004 Hz
1004Hz
SF
F1
QUIET
SKIP
304Hz
SEN D
(AM5e Classic)
15kHz
WIDE
3kHz
50kBit
PGM
60 Hz
CMSG
FI LTER
(AM5 Classic)
UNWTD
WIDE
RMS
2kHz
SWTD
FLAT
Q PEAK
SWTD
0
1
0 0
1 1
UNWTD
RMS
RMS
PSHO
60 Hz
1 1
0 0
1 1
0 0
0 0
1 1
1 1
0 0
FI LTER
(AM5e Classic)
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