Spectracom Corporation PathAlign-R
2200 / 2240 / 2241 PathAlign-R Manual
2.9.2 Band 2, Band 3, and Band 4 Field Verification Check
1. First, connect the coax cable to the proper Band connector on each PathAlign-R and
then, connect the waveguide adapter (transition) to the other end of this coax making
sure that the waveguide adapter band is appropriate for the PathAlign-R’s frequency
band range. Note: It is absolutely necessary for the proper waveguide to the used.
Waveguides are designed to work within a limited frequency range and a
waveguide’s cutoff frequency WILL NOT allow frequencies to propagate below
this cutoff frequency! Frequencies above the waveguide’s passband will
encounter multi-mode effects and their throughput will be unpredictable.
2. Using the thumbwheel switches, select the appropriate Band frequency on both
PathAlign-R’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 appropriate band connector on each unit is lit, indicating
operation of that band.
5. Face the opening of each waveguide adapter towards the other, with approximately a 3-
foot space between them.
6. If both PathAlign-Rs, coax cables, and waveguide adapters are operating correctly, you
should observe the following path loss (displayed on each PathAlign-R’s meter):
For Band 2 (5.8 – 6.6 GHz) & a WR-137 waveguide adapter: approx. -40dB;
For Band 3 (11 - 12 GHz) & a WR-90 waveguide adapter: approx. -50 dB;
For Band 4 (18.1-19.4 GHz) & a WR-42 waveguide adapter: approx. -60 dB.
Note: The two PathAlign-Rs should typically read within 4 dB of one another.
7. The path loss you observe should be close to the above numbers. If the loss is
significantly different, check or replace the coax cables or waveguide adapters and
repeat the above test.
8. This completes the field operational confidence check.
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