PathAlign-R
Spectracom Corporation
2200 / 2240 / 2241 PathAlign-R Manual
2-16
2.9
Field Verification Check
The following operational checks of the PathAlign-R may be made by personnel in the field to
confirm proper operation of both PathAlign-R units, their coax cables and the waveguide
adapters (transitions). This confirmation may be made prior to climbing the towers or whenever
an operational confidence check needs to be made in the field, without access to test equipment
or electronic technicians. The Band 1 (1.5 – 2.5 GHz) check is given first, using a 40 dB
attenuator. Bands 2, 3, and 4 are given next, using the appropriate waveguide adapters. Figures
2-1 (Band 1) and 2-2 (Bands 2, 3, and 4) illustrate the setups.
2.9.1 Band 1 (1.5 - 2.5 GHz) Field Verification Check
1. First, using two SMA terminated coax cables, connect one end to the Band 1 connector
on each PathAlign-R. Connect the other end of each cable to a 40 dB in line attenuator.
Note: Without the attenuator, the input circuits of the PathAlign-R would overload.
The attenuator needs to pass frequencies from DC through 18 GHz. An
appropriate attenuator is manufactured by Mini-Circuits, model BW-S40W2.
2.
Using the thumbwheel switches, select any Band 1 frequency.
Note: The 2240’s
thumbwheels must be set to the same frequency on both units.
3. Set one PathAlign-R to ’MASTER’ and the other PathAlign-R to ’SLAVE’ and then power
up both units.
4. Observe that the LED over the Band 1 connector on each unit is lit, indicating operation
of that band.
5. The path loss indicated on the meter should be close to 40 dB. If the loss is significantly
different, check or replace the coax cables or attenuator and repeat the test.
Note:
The
two PathAlign-Rs should typically read within 4 dB of one another.
6. This completes the field operational confidence check of Band 1.
Figure 2-1. Band 1 Field Verification Check Test Setup
Summary of Contents for Pendulum PathAlign-R 2200
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