SMC Networks D3USG Manual De Usuario
ANSI C63.17-2006
Methods of Measurement of the Electromagnetic and Operational Compatibility of UPCS Devices
8.2
8.2.1
Timing for EUTs using communications channel-type transmissions
This group of tests is applicable for an EUT that implements communications channel transmissions. The
tests are intended to verify the timing of the EUT under conditions where acknowledged transmissions are
expected. Acknowledged transmissions require a companion device; see Figure 7 or Figure 8 for test
configuration.
tests are intended to verify the timing of the EUT under conditions where acknowledged transmissions are
expected. Acknowledged transmissions require a companion device; see Figure 7 or Figure 8 for test
configuration.
Acknowledgements
This subclause tests the EUT response to the lack of initial or continuing acknowledgements from the
companion device under conditions where acknowledged transmissions are expected.
For the purposes of this test, the companion device or its interconnection shall be controllable
companion device under conditions where acknowledged transmissions are expected.
For the purposes of this test, the companion device or its interconnection shall be controllable
so that
acknowledgements to the EUT of EUT transmissions may be blocked. If a beacon signal from the
companion device is necessary for the EUT to attempt the start of a communications channel, the EUT
shall be provided with the beacon from the companion device.
The test procedure of step a) in this subclause verifies that a starting EUT will cease transmission within 1 s
if an initial acknowledgement from a companion device is not received during the establishment of a
communications channel. The test procedure of step c) in this subclause verifies that an EUT will cease
transmission on the communications channel if an acknowledgement is not received at least every 30 s, for
an established communications channel.
Starting the activation of a communications channel in this context means sending the first message(s) on
the selected communications channel. For the test procedure of step a) in this subclause, the EUT is the
starting device. For the test procedure of step c) in this subclause, either the EUT or the companion device
may be the starting device, as appropriate.
The test procedure is as follows:
companion device is necessary for the EUT to attempt the start of a communications channel, the EUT
shall be provided with the beacon from the companion device.
The test procedure of step a) in this subclause verifies that a starting EUT will cease transmission within 1 s
if an initial acknowledgement from a companion device is not received during the establishment of a
communications channel. The test procedure of step c) in this subclause verifies that an EUT will cease
transmission on the communications channel if an acknowledgement is not received at least every 30 s, for
an established communications channel.
Starting the activation of a communications channel in this context means sending the first message(s) on
the selected communications channel. For the test procedure of step a) in this subclause, the EUT is the
starting device. For the test procedure of step c) in this subclause, either the EUT or the companion device
may be the starting device, as appropriate.
The test procedure is as follows:
a) This step applies only to an EUT that can start the activation of the communications channel.
Block acknowledgements from the companion device. Have the EUT start transmission on the
communications channel. Verify that the EUT does not transmit on the communications channel
for more than 1 s, since an initial acknowledgement is not received.
communications channel. Verify that the EUT does not transmit on the communications channel
for more than 1 s, since an initial acknowledgement is not received.
b) Unblock acknowledgements from the companion device, and verify that the EUT can initiate
and maintain a communications channel when acknowledgements are present.
c) This step tests that an EUT terminates transmissions on the communications channel within 30 s
if acknowledgements cease, for an established communications channel. This test applies for
both an EUT that starts the activation and an EUT that only responds. Activate the
communications channel transmissions with unblocked acknowledgements between the EUT
and the companion device. Then block acknowledgements from the companion device and
verify that the EUT terminates its transmission on the communication channel in 30 s or less.
both an EUT that starts the activation and an EUT that only responds. Activate the
communications channel transmissions with unblocked acknowledgements between the EUT
and the companion device. Then block acknowledgements from the companion device and
verify that the EUT terminates its transmission on the communication channel in 30 s or less.
23
See 47CFR15.323(c)(4).
24
For the purpose of testing the response of the EUT to the lack of initial or continuing acknowledgements, the acknowledgement by
the companion device of EUT transmissions may be prevented by turning off the companion device, by the insertion of attenuation
between the companion device and the EUT, by the application of blocking interference to the companion device, by administrative
commands applied to the companion device, or by any means appropriate to the purpose of the test.
between the companion device and the EUT, by the application of blocking interference to the companion device, by administrative
commands applied to the companion device, or by any means appropriate to the purpose of the test.
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