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Overview
This guide explains how to interpret SNYPER survey results in practical deployment scenarios. It explains how to compare operators, assess signal strength and signal quality, identify unsuitable networks, decide when to reposition antennas and select the most appropriate network technology for an application.
A cellular survey provides more than a simple signal strength reading.
A good deployment decision should consider:
The strongest signal is not always the best network.
This guide explains:
Expected Result
At the end of this guide the user will be able to make practical network selection decisions using SNYPER survey results.
When reviewing survey results, use a structured process rather than selecting the strongest signal.
| Step | Action |
|---|---|
| 1 | Identify available operators |
| 2 | Review available technologies |
| 3 | Compare signal strength |
| 4 | Compare signal quality |
| 5 | Check consistency across repeated surveys |
| 6 | Consider application requirements |
| 7 | Select the most suitable network |
| 8 | Confirm antenna position and installation location |
The first step is to identify which operators are visible at the survey location.
A good deployment location should ideally show:
| Result | Interpretation |
|---|---|
| Multiple operators visible | Good choice and redundancy |
| One operator visible | Limited deployment choice |
| No operators visible | Unsuitable location or antenna issue |
Important Note
The strongest operator is not always the best operator. Signal quality, technology availability and application requirements must also be considered.
Different cellular technologies are suitable for different applications.
| Technology | Typical Use |
|---|---|
| GSM / GPRS / EDGE | Legacy telemetry and low-speed applications |
| UMTS / HSPA | Legacy packet data applications |
| LTE | General industrial routers, modems and high-speed applications |
| 5G NR | High throughput and low latency applications |
| LTE-M | Low power mobile IoT applications |
| NB-IoT | Low power fixed IoT applications |
| NTN | Remote satellite-based IoT applications |
| GNSS | Positioning, mapping and survey location reference |
UMTS End of Life
UMTS (3G) networks have been retired in many countries and continue to be phased out globally. Existing deployments should be reviewed and migration to LTE, LTE-M, NB-IoT or 5G technologies should be considered where appropriate.
Signal strength indicates how powerful the received signal is.
Typical strength measurements include:
| Technology | Signal Strength Measurement |
|---|---|
| GSM | RSSI / RxLev / dBm |
| UMTS | RSCP |
| LTE | RSRP |
| 5G NR | SSB RSRP |
| LTE-M | RSRP |
| NB-IoT | RSRP |
| NTN | RSRP / RSSI |
| GNSS | C/N0 |
A stronger signal generally improves reliability, but strength alone is not enough.
| LTE RSRP Signal Quality Scale (dBm) | |||
| Poor | Fair | Good | Excellent |
| < -100 | -100 to -90 | -90 to -80 | > -80 |
| Min -140 dBm | Max -44 dBm | ||
Signal quality indicates how clean and usable the received signal is.
Typical quality measurements include:
| Technology | Signal Quality Measurement |
|---|---|
| UMTS | EC/IO |
| LTE | RSRQ / SINR |
| 5G NR | SSB RSRQ / SSB SINR |
| LTE-M | RSRQ / SINR |
| NB-IoT | RSRQ / SINR |
| NTN | RSRQ / SINR |
| GNSS | HDOP / PDOP / C/N0 |
Important Note
A strong signal with poor quality may perform worse than a weaker signal with good quality.
| LTE RSRQ Signal Quality Scale (dB) | |||
| Poor | Fair | Good | Excellent |
| < -15 | -15 to -12 | -12 to -8 | > -8 |
| Min -19.5 dB | Max -3 dB | ||
| SINR Signal Quality Scale (dB) | |||
| Poor | Fair | Good | Excellent |
| < 0 | 0 to 10 | 10 to 20 | > 20 |
| Min -20 dB | Max 30+ dB | ||
Use the following matrix when comparing survey results.
| Signal Strength | Signal Quality | Practical Interpretation |
|---|---|---|
| Strong | Good | Best candidate network |
| Strong | Poor | Possible congestion or interference |
| Weak | Good | May be usable with suitable antenna |
| Weak | Poor | Usually unsuitable |
| Variable | Variable | Repeat survey or review installation position |
| Measurement | Example Value |
|---|---|
| RSRP | -75 dBm |
| RSRQ | -8 dB |
| SINR | 22 dB |
This is a strong candidate network.
It indicates:
Select this network if it supports the required technology and service.
| Measurement | Example Value |
|---|---|
| RSRP | -75 dBm |
| RSRQ | -16 dB |
| SINR | -2 dB |
The network signal is strong, but the quality is poor.
This may indicate:
Do not select this network based on signal strength alone.
Compare against other operators and repeat the survey from a slightly different antenna position.
| Measurement | Example Value |
|---|---|
| RSRP | -106 dBm |
| RSRQ | -8 dB |
| SINR | 18 dB |
The network signal is weak, but the quality is good.
This may indicate:
Consider using a higher gain antenna or relocating the antenna to improve signal strength.
| Measurement | Example Value |
|---|---|
| RSRP | -112 dBm |
| RSRQ | -17 dB |
| SINR | -5 dB |
This is normally an unsuitable deployment candidate.
It indicates:
Select another operator, change antenna position or use a different technology.
When comparing operators, use a balanced assessment rather than choosing the strongest signal.
| Factor | Why It Matters |
|---|---|
| Signal strength | Indicates coverage level |
| Signal quality | Indicates usability |
| Technology | Determines service capability |
| Number of cells | Indicates local network density |
| Consistency | Indicates reliability |
| Application fit | Determines suitability |
| Operator | Technology | RSRP | RSRQ | SINR | Assessment |
|---|---|---|---|---|---|
| Operator A | LTE | -78 | -15 | 0 | Strong but poor quality |
| Operator B | LTE | -92 | -8 | 17 | Weaker but cleaner |
| Operator C | LTE | -104 | -13 | 5 | Marginal |
Operator B may be the best candidate despite having lower signal strength than Operator A.
A single survey shows the network condition at one moment in time.
For critical deployments, perform multiple surveys.
| Survey Pattern | Benefit |
|---|---|
| Multiple surveys at same location | Confirms consistency |
| Surveys at different times | Reveals congestion variation |
| Surveys at different antenna positions | Identifies best installation point |
| Surveys with different SIMs | Checks operator-specific behaviour |
Important Note
Cellular networks are dynamic. Load, weather, interference, maintenance and operator configuration changes can affect results.
LTE is suitable for:
| Priority | Measurement |
|---|---|
| Coverage | RSRP |
| Quality | RSRQ |
| Performance | SINR |
| Stability | Repeated survey consistency |
5G is suitable for:
| Priority | Measurement |
|---|---|
| 5G availability | 5G NR cell detection |
| Strength | SSB RSRP |
| Quality | SSB RSRQ |
| Performance | SSB SINR |
| Architecture | NSA or SA |
Important Note
For 5G NSA deployments, LTE anchor coverage may be required before 5G service is available.
LTE-M is suitable for:
| Priority | Measurement |
|---|---|
| Coverage | RSRP |
| Quality | RSRQ / SINR |
| Mobility | LTE-M network support |
| Power saving | PSM / eDRX support |
NB-IoT is suitable for:
| Priority | Measurement |
|---|---|
| Coverage | RSRP |
| Deep indoor suitability | Coverage enhancement |
| Quality | RSRQ / SINR |
| Stability | Repeated survey consistency |
Important Note
NB-IoT can operate at lower signal levels than conventional LTE, but poor signal quality can still affect reliability and battery life.
NTN is suitable for:
| Priority | Measurement |
|---|---|
| Satellite visibility | Clear sky view |
| Elevation angle | Higher is normally better |
| Signal strength | RSRP / RSSI |
| Signal quality | RSRQ / SINR |
| Consistency | Repeat over time |
GNSS is used to provide survey location, mapping position and timing.
| Priority | Measurement |
|---|---|
| Satellite visibility | Satellites in view |
| Fix quality | Satellites used |
| Horizontal accuracy | HDOP |
| Signal quality | C/N0 |
| Stability | Consistent position |
Antenna position can significantly affect survey results.
| Observation | Possible Issue |
|---|---|
| Low RSRP | Weak signal or poor antenna position |
| Poor RSRQ | Reflections, interference or congestion |
| Negative SINR | High interference |
| Unstable results | Marginal coverage |
| No GNSS fix | Poor sky visibility |
| No NTN result | Obstructed satellite view |
Repeat the survey when:
Some SNYPER survey modes can operate without a SIM card.
However, a SIM card may be useful when:
Important Note
A SIM-enabled survey may show only networks that the SIM is permitted to access. A SIM-free survey is usually better for comparing all visible operators.
Some cellular networks share physical radio infrastructure.
This means two apparent networks may use the same:
For resilience applications, compare:
If two operators appear to share the same physical cell, selecting both for a dual-SIM router may not provide true infrastructure redundancy.
Use the following decision table.
| Condition | Recommendation |
|---|---|
| Strong signal and good quality | Preferred candidate |
| Strong signal but poor quality | Investigate before selecting |
| Weak signal but good quality | Consider antenna improvement |
| Weak signal and poor quality | Avoid where possible |
| Multiple good networks | Select based on application and commercial requirements |
| Only one marginal network | Consider external antenna or alternative technology |
| No terrestrial network | Consider NTN |
| Mistake | Why It Causes Problems |
|---|---|
| Selecting strongest signal only | Ignores quality and interference |
| Ignoring SINR | Misses interference problems |
| Ignoring repeated surveys | Misses network variability |
| Comparing different technologies directly | Different technologies behave differently |
| Ignoring antenna placement | Installation may not match survey conditions |
| Ignoring SIM restrictions | SIM may limit visible networks |
| Ignoring cell sharing | May overestimate resilience |
Before confirming a network:
| Check | Complete |
|---|---|
| Multiple operators compared | |
| Required technology available | |
| Signal strength acceptable | |
| Signal quality acceptable | |
| Repeated surveys consistent | |
| Antenna position confirmed | |
| SIM tested if required | |
| Cell sharing considered | |
| Application requirements reviewed |
| Step | Action |
|---|---|
| 1 | Identify available operators |
| 2 | Confirm available technologies |
| 3 | Compare signal strength |
| 4 | Compare signal quality |
| 5 | Review repeated survey consistency |
| 6 | Review possible shared infrastructure |
| 7 | Match results to application requirements |
| 8 | Confirm antenna placement |
| 9 | Select the most suitable network |
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