Henderson Springs Rooftop Antenna Spacing Trial

Henderson Springs rooftop antenna frame after restoration to the original configuration — Henderson Springs after the antenna pair was returned to its original rooftop configuration for final RF validation.

Trial work: Across three visits, we tested the rooftop antenna pair at 6 feet, 3 feet, and the original layout. I documented the RRU32 port plan, pre/post checks, sweep and PIM records, and final validation after the original configuration was restored.

3 visitsThree trial visits over two weeks

6 ft → 3 ftTwo test spacings before returning to the original layout

24/24 PASSFinal-configuration PIM reports across LTE 700 and AWS

48 tracesFinal DTF and return-loss sweep files across 24 feeder paths

Three documented rooftop configurations

April 17: 6-foot spacing. We tested the antenna pair at 6 feet apart. RRU32 ports A and B were assigned to the left antenna, with C and D on the right. I documented the LTE and AWS sweep, PIM, and pre/post results.
April 24: 3-foot spacing. We changed the pair from 6 feet to 3 feet apart. Rain prevented new sweep and PIM runs, so the same lines stayed in place. I documented the pre/post checks; the site update records no alarms.
May 1: original layout restored. We returned the antennas to the original layout. I documented new LTE 700 and AWS sweep, PIM, and pre/post results, with no alarms recorded.

Henderson Springs rooftop antenna frame during the documented six-foot spacing visit — **Visit 1:** rooftop array documented during the 6-foot spacing checkpoint.

Henderson Springs antenna pair during the documented three-foot spacing visit — **Visit 2:** antenna pair documented after the change to 3-foot spacing.

Henderson Springs antenna pair restored to its original rooftop configuration — **Visit 3:** original configuration restored before the final sweep, PIM, and pre/post checks.

RF evidence across the trial

The project files include 60 Kaelus PIM reports. Two initial 700 MHz checks failed the -143.0 dBc threshold, and both same-day retests passed. After the antennas were returned to the original layout, all 24 PIM reports passed. The final files also include 48 raw sweeps—distance-to-fault and return-loss traces for 24 LTE 700 and AWS feeder paths.

Representative Gamma 700 BY PIM sequence · threshold -143.0 dBc

Checkpoint	PIM	Peak PIM	Result
Initial pre-check · April 16	-140.5 dBc	-140.2 dBc	FAIL
Same-day retest · April 16	-161.6 dBc	-160.6 dBc	PASS
Restored-configuration check · April 30	-157.7 dBc	-157.7 dBc	PASS

Henderson Springs Gamma 700 BY pre-check PIM report failing at negative 140.5 dBc — **Initial check:** Gamma 700 BY failed at -140.5 dBc.

Henderson Springs Gamma 700 BY same-day PIM retest passing at negative 161.6 dBc — **Controlled retest:** the same feeder passed at -161.6 dBc.

Henderson Springs Gamma 700 BY final restored-configuration PIM report passing at negative 157.7 dBc — **Restored configuration:** Gamma 700 BY passed at -157.7 dBc, below the -143.0 dBc threshold.

Physical configuration and documentation

The photos show the labels, color-coded jumpers, connector paths, and mechanical readings used to keep each setup consistent. They also confirm how the antennas and cabling were returned to the original layout.

Labeled Henderson Springs RRU units and color-coded RF jumper connections — Labeled RRU units and color-coded RF paths used during the trial.

Digital level reading documented on the Henderson Springs A1 antenna — Digital level reading taken at the A1 antenna.

Henderson Springs rooftop RF jumpers dressed and routed around the antenna frame — Jumper routing and slack after the antennas were returned to the original layout.

What the records show: The records document all three configurations, the testing completed, and the return to the original layout. They do not say which spacing worked best, so I am not claiming that result.