3M Dynatel 965AMS Manuel utilisateur
121
3M™ Dynatel™ Advanced Modular System 965AMS Measurement Functions
POTS
Tests available with the POTS key include Loss, Noise,
Longitudinal Balance, Load Coil Counter, Caller ID, Ringers,
and Level Trace.
POTS>Loss
Use Loss to measure the loss from the far-end of a circuit to the
near-end using a precision tone between 200 Hz and 20kHz.
Note: You must use a device at the far end to generate the tone.
This could be the milliwatt number in the central office or an
965AMS set to the tone mode.
POTS>Loss>Hook-Up
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Measurement Functions 3M™ Dynatel™ Advanced Modular System 965AMS
POTS>Loss>Operation
1. Press the blue key to
enter POTS menu. Use the
up and down arrow keys to
select Loss.
2. Press OK to start the test.
3. Dial a milliwatt number.
There are 2 ways to enter
the milliwatt numbers:
1.
Use the blue keys to
enter the number just
like you were dialing a
standard telephone.
Press Dial when you
have entered all of the
digits.
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3M™ Dynatel™ Advanced Modular System 965AMS Measurement Functions
POTS>Loss>Operation
2.
Or, use the memory
mode. The 965AMS
can store up to 10
numbers in the quiet
line memory list.
Press Setup to select
or edit numbers from
memory.
a. Use the up and down
arrow keys to find the
quiet line number for
the central office you
want to measure.
b. Use Edit Number to
add new numbers
or to edit existing
numbers using the
blue keys.
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124
Measurement Functions 3M™ Dynatel™ Advanced Modular System 965AMS
POTS>Loss>Operation
c. Press Select to
move to the DTMF
or Pulse dialing
section. Use the Up
and Down arrow
keys to select a
dialing method.
DTMF pulsing is
the default value.
d. Press Select to
move to the loop
start-ground start
section. Use the
Up and Down
arrow keys to select
a method. The
default is loop start.
Press OK to return
to the main Dial
Noise screen.
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125
3M™ Dynatel™ Advanced Modular System 965AMS Measurement Functions
POTS>Loss>Operation
e. Press Dial to begin
the test.
4. Point to Point
Measurements
1. Use a 965AMS tester
or a 965DSP tester set
to the tone mode.
2. Verify that both ends
of the circuit are on the
same frequency.
3. Press Send Tone at the
sending end.
4. Press Measure at the
receiving end.
5. Results screen:
POTS Loss Measurement Normal Range
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126
Measurement Functions 3M™ Dynatel™ Advanced Modular System 965AMS
Parameter OK Marginal Not OK
Balance > 60 p 50-60 < 50 dBm
Loss > 8.5 — < 8.5 dBm
Noise < 80 20-30 < 30 dBmC
POTS>Noise
Use Noise to measure the Noise, Power Influence, and the
calculated Balance of a pair.
POTS>Noise>Hook-Up
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POTS>Noise>Operation
1. Press the blue key to
enter POTS menu. Use the
up and down arrow keys to
select Noise.
2. Press OK to start the test.
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3M™ Dynatel™ Advanced Modular System 965AMS Measurement Functions
POTS>Noise>Operation
3. Enter the quiet line number
for the central office you
are calling.
There are 2 ways to enter
the quiet line numbers:
1.
Use the blue keys to
enter the number just
like you were dialing a
standard telephone.
If you have a
combination milliwatt
and quiet line, enter
the number 3 as the
telephone number. This
will provide the proper
termination for the
noise measurement.
Press Dial when you
have entered all of the
digits.
2. Or, use the memory
mode. Up to 10
numbers can be
stored in the quiet line
memory list.
Press Setup to select
or edit numbers from
memory.
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Measurement Functions 3M™ Dynatel™ Advanced Modular System 965AMS
POTS>Noise>Operation
a. Use the up and down
arrow keys to find the
quiet line number for
the central office you
want to measure.
b. Use Edit Number to
add new numbers
or to edit existing
numbers using the
blue keys.
c. Press Select to
move to the DTMF
or Pulse dialing
section. Use the Up
and Down arrow
keys to select a
dialing method.
DTMF pulsing is
the default value.
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129
3M™ Dynatel™ Advanced Modular System 965AMS Measurement Functions
POTS>Noise>Operation
d. Press Select to
move to the loop
start-ground start
section. Use the
Up and Down
arrow keys to select
a method. The
default is loop start.
Press OK to return
to the main Dial
Noise screen.
e. Press Dial to begin
the test.
4. Results screen:
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Measurement Functions 3M™ Dynatel™ Advanced Modular System 965AMS
POTS Noise Normal Range
Parameter OK Marginal Not OK
Balance > 60 50–60 < 50dBm
Loss > 8.5 — < 8.5dBm
Noise < 80 20–30 < 30dBmC
POTS>Longitudinal Balance
Use Longitudinal Balance to measure the active Longitudinal
Balance on the pair. This test measures the ability of the Tip and
Ring to reject noise and crosstalk.
POTS>Longitudinal Balance>Hook-Up
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