📡
Frequency
1924 MHz
Frequency
1924 MHz
🧭
Range
1920–1980 MHz
Range
1920–1980 MHz
🧩
Band Group
PCS Guard Band
Band Group
PCS Guard Band
🌐 Summary
The 1924 MHz allocation is part of the PCS Guard Band spectrum. This range is used worldwide for critical applications that keep our communications and infrastructure running smoothly. On this page we highlight how each band is applied in real systems, from regulatory assignments to everyday devices. Our goal is to make spectrum data clear and practical for engineers, regulators, and enthusiasts alike.
Key uses of this band include: REGIONAL ALLOCATION: Americas – Guard band (1920-1930 MHz) separating PCS uplink from downlink. Europe/Asia/Africa – Band 1 uplink (mobile devices transmit to towers, 1920-1980 MHz, paired with 2110-2170 downlink). Same frequency range, completely different regional uses. Multi-band devices must support both allocations for global roaming..
REGIONAL DIFFERENCES: Americas – Guard band (1920-1930 MHz) between PCS UL/DL. Europe/Asia/Africa – Band 1 UPLINK (mobile devices transmit 1920-1980 MHz, paired with 2110-2170 MHz downlink). Same frequency, completely different uses by region. NOT globally harmonized.
🔍 Explore the full RF Spectrum database
📡 Band & Geometry key
| Field | Value |
|---|---|
| Wavelength (m) | 0.15581728586279 |
| Waveforms | N/A (guard band – no transmissions) |
| Antenna Form Factor (Typical) | N/A (guard band) |
| Band Family | PCS 1900 Guard |
| Band | PCS Guard Band (1920-1930 MHz) |
| Primary Common Name | PCS Guard Band (1920-1930 MHz) |
| FSPL @ 1 km [dB] | 98.134101354036 |
| FSPL @ 10 km [dB] | 118.13410135404 |
| Fresnel Radius @ 1 km (m) | 6.2413397172159 |
| Band Group | PCS Guard Band |
| Tax Band Family | IMT / Cellular (PCS 1900 – Americas) |
| Tax Band Class | Americas: Terrestrial Mobile Downlink (Band 2); Europe/Asia: Terrestrial Mobile Uplink (Band 1) (Mobitex) |
🧩 Applications & Usage
| Field | Value |
|---|---|
| Primary Application | Spectrum separation between PCS uplink (1850-1910 MHz) and downlink (1930-1990 MHz) |
| Lower Neighbor Use | 1920–1930 MHz PCS guard band |
| Upper Neighbor Use | 1980–1990 MHz PCS downlink continuation |
| Typical Services Devices | N/A (guard band) |
| Market Common Devices | N/A (guard band – no devices operate here) |
| Refarming Use | N/A (guard band – must be maintained) |
| Device Ecosystem Size | Very large (hundreds of millions of devices) |
| Device Hotspots (MHz) | N/A (guard band – no channels assigned) |
| Device Category | N/A (guard band) |
| Typical Use Cases | Spectrum separation to prevent interference between uplink and downlink |
| Modulation (Device) | N/A (guard band) |
| Channel Width (Device) [kHz] | N/A (guard band) |
| Device Region Profiles | N/A (guard band) |
| Per-Region EIRP Or Duty (Device) | Restricted – no transmissions permitted in guard band |
| Allocation Relevance (Device) | N/A (guard band) |
| Adjacent-Band Collision Risks (Device) | N/A (guard band) |
| Example Devices Or Skus | N/A (guard band) |
| Common Protocols | N/A (guard band) |
🗒️ Notes
| Field | Value |
|---|---|
| Receiver Selectivity Notes | N/A (guard band) |
| Interference Notes | Guard band prevents interference between PCS uplink and downlink operations |
| Compatibility Risk Notes | Not interchangeable with global Band 1 uplink usage |
| Notes | REGIONAL DIFFERENCES: Americas – Guard band (1920-1930 MHz) between PCS UL/DL. Europe/Asia/Africa – Band 1 UPLINK (mobile devices transmit 1920-1980 MHz, paired with 2110-2170 MHz downlink). Same frequency, completely different uses by region. NOT globally harmonized. |
| Propagation Notes | N/A (guard band – no transmissions) |
⚙️ Technical Rules
| Field | Value |
|---|---|
| Lower Band Frequency Limit | 1920 |
| Upper Band Frequency Limit | 1980 |
| EIRP Indoor Limits | Restricted (guard band) |
| EIRP Outdoor Limits | Restricted (guard band) |
| PSD Limit | Restricted (guard band – no transmissions permitted) |
| Emission Mask Class | N/A (guard band) |
| Guardband Minimum [kHz] | Entire 10 MHz serves as guard (1920-1930 MHz) |
| Typical Bandwidths | N/A (guard band) |
| Autocalculated Bandlimits | N/A (guard band) |
| Typical Bandwidths (Estimated) | N/A (guard band) |
| Max EIRP [dBm] | Restricted – no transmissions permitted in guard band |
| Power Source Or Duty Profile (Typical) | N/A (guard band) |
| Channelization Plan | N/A (guard band) |
| Channelization | N/A (guard) |
| Guard Band Requirement | N/A (guard band) |
| OOB Emission Limit [dBm/MHz] | N/A (guard band) |
| Spurious Emission Limit (dBm) | Restricted (guard band) |
| RX Blocking Min [dBm] | N/A (guard band) |
| Duplexing | N/A (guard band) |
| Duplexing Information | Downlink portion of PCS 1900; paired with 1850–1910 MHz uplink |
| Uplink Pairing | 1850–1910 MHz |
| Downlink Pairing | 1930–1990 MHz (includes 1930–1980 MHz segment) |
| Paired Band Info | 3GPP Band 2 downlink paired with Band 2 uplink |
| Max EIRP [dBm] | Restricted (guard band) |
| Channelization Block Size | N/A (guard band) |
| 3GPP Band Number | |
| Example 3GPP Bands | N/A (guard band) |
| LTE Uplink Bands | N/A (guard band) |
| LTE Downlink Bands | N/A (guard band) |
| NR Uplink Bands | N/A (guard band) |
| NR Downlink Bands | N/A (guard band) |
| Guard Bands | THIS IS the guard band |
| Protocol Or Standard | FCC Part 27 (guard band) |
🌎 Country Overrides
| Field | Value |
|---|---|
| Tax Service Category | Terrestrial Mobile (PCS) |
| Tax License Type | Licensed (FCC/ISED PCS assignments) |
| Tax Regions | Americas (United States, Canada, Latin America) |
| ITU Region 1 (Europe, Africa, Middle East (west of Persian Gulf), Western Russia & Mongolia) | N/A (Region 1 uses Band 1 uplink; Americas has guard band) |
| ITU Region 2 (North America, South America, Central America, Caribbean, Greenland, Eastern Pacific Islands (Americas region)) | Guard band (PCS spectrum separation) |
| ITU Region 3 (Asia, Australia, Pacific Islands, Oceania, Indian Subcontinent, East Asia & Southeast Asia) | N/A (Region 3 uses Band 1 uplink; Americas has guard band) |
| License Type | Part of licensed PCS allocation (maintained as guard) |
| Primary Application | Spectrum separation between PCS uplink (1850-1910 MHz) and downlink (1930-1990 MHz) |
| Primary Services | Guard band (no active service) |
| Spurious Emission [dBm] | Restricted (guard band) |
| Lower Neighbor Use | 1920–1930 MHz PCS guard band |
| Upper Neighbor Use | 1980–1990 MHz PCS downlink continuation |
| Licensing Model | Guard band – restricted |
| Typical Services Devices | N/A (guard band) |
| US FCC Alloc | Guard band (PCS Part 27)– |
| CA IC Alloc | Guard band (PCS SRSP-512)– |
| UK Ofcom Alloc | N/A (UK uses different allocation – Band 1 uplink)– |
| US Ref | FCC Part 27 (guard) |
| Typical Bandwidths | N/A (guard band) |
| Market Licensing Model | N/A (guard band – not licensed for active use) |
| Market Common Devices | N/A (guard band – no devices operate here) |
| Fresnel Radius (1st, 1 km) [m] | 6.2413397172159 |
| Typical Bandwidths (Estimated) | N/A (guard band) |
| Auction Status | N/A (guard band maintained in spectrum allocation) |
| Refarming Use | N/A (guard band – must be maintained) |
| Typical Site Spacing km | N/A (guard band) / N/A (guard band) |
| Device Ecosystem Size | Very large (hundreds of millions of devices) |
| Traffic Load Share | N/A (guard band) |
| Device Hotspots (MHz) | N/A (guard band – no channels assigned) |
| Device Category | N/A (guard band) |
| Typical Use Cases | Spectrum separation to prevent interference between uplink and downlink |
| Typical Center Frequencies [MHz] | N/A (guard band) |
| Rule Part (Fcc Or Region) | FCC Part 27 (guard band); ISED SRSP-512 |
| Modulation (Device) | N/A (guard band) |
| Channel Width (Device) [kHz] | N/A (guard band) |
| Device Region Profiles | N/A (guard band) |
| Per-Region EIRP Or Duty (Device) | Restricted – no transmissions permitted in guard band |
| Allocation Relevance (Device) | N/A (guard band) |
| Adjacent-Band Collision Risks (Device) | N/A (guard band) |
| Example Devices Or Skus | N/A (guard band) |
| Antenna Form Factor (Typical) | N/A (guard band) |
| Power Source Or Duty Profile (Typical) | N/A (guard band) |
🛡️ Regulatory & Neighbors
| Field | Value |
|---|---|
| Lower Band Frequency Limit | 1920 |
| Upper Band Frequency Limit | 1980 |
| Rx Blocking Min dBm | N/A (guard band) |
| Lower Neighbor Use | 1920–1930 MHz PCS guard band |
| Upper Neighbor Use | 1980–1990 MHz PCS downlink continuation |
| Lower Neighbor Band | PCS Guard Band |
| Lower Neighbor Range | 1920–1930 MHz |
| Upper Neighbor Label | PCS Downlink (Band 2) |
| Upper Neighbor Range | 1980–1990 MHz |
| Adjacent-Band Collision Risks (Device) | N/A (guard band) |
| Real-World Range (Indoor/Outdoor) | N/A (guard band) |
| US FCC Alloc | Guard band (PCS Part 27)Guard band (PCS Part 27) |
| CA IC Alloc | Guard band (PCS SRSP-512)Guard band (PCS SRSP-512) |
| UK Ofcom Alloc | N/A (UK uses different allocation – Band 1 uplink)N/A (UK uses different allocation – Band 1 uplink) |
| Regulatory References | US: FCC Part 27 (guard); CA: ISED SRSP (guard); UK: 3GPP TS 36.101 (Band 1 UL); Ofcom |
| Global Harmonization | Not harmonized globally. Americas: PCS guard band. Other regions: Band 1 uplink. |
| Crossborder Coordination | Critical – guard band must be maintained at US-Canada and US-Mexico borders |
| Sharing Mechanism | N/A (guard band) |
| Auction Status | N/A (guard band maintained in spectrum allocation) |
| Guard Or Pair | Paired (FDD) |
📈 Market & Measurements
| Field | Value |
|---|---|
| Noise Floor | N/A (guard band – no active receivers) |
| Interference Cases | N/A (guard band) |
| Lower Neighbor Range | 1920–1930 MHz |
| Upper Neighbor Range | 1980–1990 MHz |
| Interference Notes | Guard band prevents interference between PCS uplink and downlink operations |
| Market Licensing Model | N/A (guard band – not licensed for active use) |
| Market Commercial Value | N/A (guard band – no commercial use) |
| Market Common Devices | N/A (guard band – no devices operate here) |
| Market Deployment Density | N/A (guard band) |
| Noise Floor (Estimated) | N/A (guard band – no active receivers) |
| Market Commercial Value (Estimated) | N/A (guard band – no commercial use) |
| Ecosystem Maturity | N/A (guard band) |
| Indoor Penetration | N/A (guard band) |
| Known Interference | Potential interference from PCS uplink (1850-1910 MHz below) and PCS downlink (1930-1990 MHz above) without proper filtering |
| Device Ecosystem Size | Very large (hundreds of millions of devices) |
| Real-World Range (Indoor/Outdoor) | N/A (guard band) |
| Antenna Form Factor (Typical) | N/A (guard band) |
| Ecosystem Maturity | N/A (guard band) |
| Device Ecosystem Size | Very large (hundreds of millions of devices) |
| Chipset Availability | High |
| Operator Deployments | N/A (guard band) |
| Technology Generations Deployed | N/A (guard band) |
| Roaming Support | N/A (guard band) |
| Traffic Load Share | N/A (guard band) |
| Indoor Penetration | N/A (guard band) |
| Known Interference | Potential interference from PCS uplink (1850-1910 MHz below) and PCS downlink (1930-1990 MHz above) without proper filtering |
| Occupancy | N/A (guard band – unoccupied by design) |
| Occupancy Bucket Pct | N/A (guard band) |
| Latency Profile | N/A (guard band) |
| Common Channels Or Profiles | N/A (guard band – no channels) |
| Security Features | N/A (guard band) |
| Lbt Or Fhss Requirement | N/A (guard band) |
| Popularity (Installed Base) | N/A (guard band) |
| Coexistence Tips | Maintain strict emission limits on both adjacent bands (1850-1910 UL below, 1930-1990 DL above) |
| Latency Class | N/A (guard band) |
| Device Hotspots (Scoped && Tagged) | N/A (guard band) |