mirror of
https://github.com/Telecominfraproject/oopt-gnpy.git
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38cc0e3cc5
gnpy currently uses the same parameter for tx output power and span input power: this prevents from modelling low tx power effect. This patch introduces a new tx-cannel-power and uses it to propagate in ROADM. Signed-off-by: EstherLerouzic <esther.lerouzic@orange.com> Change-Id: Id3ac75e2cb617b513bdb38b51a52e05d15af46f5
244 lines
7.7 KiB
Python
244 lines
7.7 KiB
Python
# SPDX-License-Identifier: BSD-3-Clause
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#
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# Copyright (C) 2020 Telecom Infra Project and GNPy contributors
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# see LICENSE.md for a list of contributors
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#
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from pathlib import Path
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import pytest
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from gnpy.core.exceptions import NetworkTopologyError
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from gnpy.core.network import span_loss, build_network
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from gnpy.tools.json_io import load_equipment, load_network, network_from_json
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from gnpy.core.utils import lin2db, automatic_nch
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from gnpy.core.elements import Fiber, Edfa
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TEST_DIR = Path(__file__).parent
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EQPT_FILENAME = TEST_DIR / 'data/eqpt_config.json'
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NETWORK_FILENAME = TEST_DIR / 'data/bugfixiteratortopo.json'
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@pytest.mark.parametrize("node, attenuation", [
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# first fiber span
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['fiber1', 10.5],
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['fiber2', 10.5],
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['fused1', 10.5],
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# second span
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['fiber3', 16.0],
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# third span
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['fiber4', 16.0],
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# direct link between a ROADM and an amplifier
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['fused5', 0],
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# fourth span
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['fiber6', 17],
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['fused7', 17],
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# fifth span
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['fiber7', 0.2],
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['fiber8', 12],
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# all other nodes
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['Site_A', 0],
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['nodeA', 0],
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['amp2', 0],
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['nodeC', 0],
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['Site_C', 0],
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['amp3', 0],
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['amp4', 0],
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['nodeB', 0],
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['Site_B', 0],
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])
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def test_span_loss(node, attenuation):
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equipment = load_equipment(EQPT_FILENAME)
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network = load_network(NETWORK_FILENAME, equipment)
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for x in network.nodes():
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if x.uid == node:
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assert attenuation == span_loss(network, x, equipment)
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return
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assert not f'node "{node}" referenced from test but not found in the topology' # pragma: no cover
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@pytest.mark.parametrize("node", ['fused4'])
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def test_span_loss_unconnected(node):
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'''Fused node that has no next and no previous nodes should be detected'''
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equipment = load_equipment(EQPT_FILENAME)
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network = load_network(NETWORK_FILENAME, equipment)
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x = next(x for x in network.nodes() if x.uid == node)
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with pytest.raises(NetworkTopologyError):
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span_loss(network, x, equipment)
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@pytest.mark.parametrize('typ, expected_loss',
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[('Edfa', [11, 11]),
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('Fused', [11, 10])])
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def test_eol(typ, expected_loss):
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"""Check that EOL is added only once on spans. One span can be one fiber or several fused fibers
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EOL is then added on the first fiber only.
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"""
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json_data = {
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"elements": [
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{
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"uid": "trx SITE1",
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"type": "Transceiver"
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},
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{
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"uid": "trx SITE2",
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"type": "Transceiver"
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},
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{
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"uid": "roadm SITE1",
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"type": "Roadm"
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},
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{
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"uid": "roadm SITE2",
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"type": "Roadm"
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},
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{
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"uid": "fiber (SITE1 → ILA1)",
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"type": "Fiber",
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"type_variety": "SSMF",
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"params": {
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"length": 50.0,
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"loss_coef": 0.2,
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"length_units": "km"
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}
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},
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{
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"uid": "fiber (ILA1 → SITE2)",
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"type": "Fiber",
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"type_variety": "SSMF",
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"params": {
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"length": 50.0,
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"loss_coef": 0.2,
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"length_units": "km"
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}
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},
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{
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"uid": "east edfa in SITE1 to ILA1",
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"type": "Edfa"
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},
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{
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"uid": "west edfa in SITE2 to ILA1",
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"type": typ
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},
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{
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"uid": "east edfa in ILA1 to SITE2",
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"type": "Edfa"
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}
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],
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"connections": [
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{
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"from_node": "trx SITE1",
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"to_node": "roadm SITE1"
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},
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{
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"from_node": "roadm SITE1",
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"to_node": "east edfa in SITE1 to ILA1"
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},
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{
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"from_node": "east edfa in SITE1 to ILA1",
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"to_node": "fiber (SITE1 → ILA1)"
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},
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{
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"from_node": "fiber (SITE1 → ILA1)",
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"to_node": "east edfa in ILA1 to SITE2"
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},
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{
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"from_node": "east edfa in ILA1 to SITE2",
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"to_node": "fiber (ILA1 → SITE2)"
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},
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{
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"from_node": "fiber (ILA1 → SITE2)",
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"to_node": "west edfa in SITE2 to ILA1"
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},
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{
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"from_node": "west edfa in SITE2 to ILA1",
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"to_node": "roadm SITE2"
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},
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{
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"from_node": "roadm SITE2",
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"to_node": "trx SITE2"
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}
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]
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}
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equipment = load_equipment(EQPT_FILENAME)
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equipment['Span']['default'].EOL = 1
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network = network_from_json(json_data, equipment)
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p_db = equipment['SI']['default'].power_dbm
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p_total_db = p_db + lin2db(automatic_nch(equipment['SI']['default'].f_min,
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equipment['SI']['default'].f_max, equipment['SI']['default'].spacing))
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build_network(network, equipment, p_db, p_total_db)
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fibers = [f for f in network.nodes() if isinstance(f, Fiber)]
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for i in range(2):
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assert fibers[i].loss == expected_loss[i]
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@pytest.mark.parametrize('p_db, power_mode, elem1, elem2, expected_gain, expected_delta_p, expected_voa', [
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(-17, True, 'edfa', 'fiber', 15.0, 15, 15.0),
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(-17, True, 'fiber', 'edfa', 15.0, 5.0, 5.0),
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(-17, False, 'edfa', 'fiber', 0.0, None, 0.0),
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(-17, False, 'fiber', 'edfa', 10.0, None, 0.0),
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(10, True, 'edfa', 'fiber', -9.0, -9.0, 0.0),
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(10, True, 'fiber', 'edfa', 1.0, -9.0, 0.0),
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(10, False, 'edfa', 'fiber', -9.0, None, 0.0),
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(10, False, 'fiber', 'edfa', 1.0, None, 0.0)])
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def test_design_non_amplified_link(elem1, elem2, expected_gain, expected_delta_p, expected_voa, power_mode, p_db):
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"""Check that the delta_p, gain computed on an amplified link that starts from a transceiver are correct
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"""
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json_data = {
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"elements": [
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{
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"uid": "trx SITE1",
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"type": "Transceiver"
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},
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{
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"uid": "trx SITE2",
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"type": "Transceiver"
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},
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{
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"uid": "edfa",
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"type": "Edfa",
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"type_variety": "std_low_gain"
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},
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{
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"uid": "fiber",
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"type": "Fiber",
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"type_variety": "SSMF",
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"params": {
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"length": 50.0,
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"loss_coef": 0.2,
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"length_units": "km"
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}
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}
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],
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"connections": [
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{
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"from_node": "trx SITE1",
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"to_node": elem1
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},
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{
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"from_node": elem1,
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"to_node": elem2
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},
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{
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"from_node": elem2,
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"to_node": "trx SITE2"
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}
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]
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}
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equipment = load_equipment(EQPT_FILENAME)
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equipment['Span']['default'].power_mode = power_mode
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equipment['SI']['default'].power_dbm = p_db
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equipment['SI']['default'].tx_power_dbm = p_db
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network = network_from_json(json_data, equipment)
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edfa = next(a for a in network.nodes() if a.uid == 'edfa')
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edfa.params.out_voa_auto = True
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p_total_db = p_db + 20.0
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build_network(network, equipment, p_db, p_total_db)
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amps = [a for a in network.nodes() if isinstance(a, Edfa)]
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for amp in amps:
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assert amp.out_voa == expected_voa
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assert amp.delta_p == expected_delta_p
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# max power of std_low_gain is 21 dBm
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assert amp.effective_gain == expected_gain
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